G-Blog: Juni 2013

membuat antivirus bagi semua orang merupakan suatu hal yang terlihat sulit bagi mereka,apalagi bagi mereka yang sangat awam bahasa pemrograman

disini aku mau memberikan tutorial tentang cara pembuatan antivirus dari dasar dengan kemampuan sebagai berikut :

-> Teknik checksum
antivirus ini tidak menggunakan teknik scan menggunakan CRC32 melainkan menggunakan teknik READ BYTE langsung dari tubuh virus/worm nya

"Mengapa saya menerapkan teknik ini ?
tentu saja karena waktu scan akan lebih cepat daripada menggunakan CRC32,akurat pada saat pendeteksian & menghemat penggunaan string agar ukuran antivirus nya tidak terlalu besar

-> Fitur karantina file yang terdeteksi
"Dengan adanya fitur ini user tidak perlu takut file nya akan terhapus,karena dengan menggunakan fitur ini,file akan dikarantina oleh antivirus ke dalam suatu folder dan file yang terdeteksi tidak akan bisa di jalankan/di eksekusi"

-> Fitur Heuristic
"Heuristic dalam dunia antivirus berarti mendapatkan virus/worm baru"
pada antivirus ini akan diterapkan 2 teknik heuristic yaitu :

1. Heuristic Icon
Hampir rata-rata semua virus lokal menggunakan icon seperti icon Office word,winamp,Icon Folder yang bertujuan agar user awam mengklik file virus tersebut,
dengan teknik ini antivirus dapat melihat mana file virus yang menyamar dengan icon palsu atau file asli yang tidak terinfeksi virus

2. Heuristic VBS
Dengan teknik ini antivirus mampu membaca source dari file VBS yang biasa di pakai virus,
antivirus akan mencocokan source yang ada pada database dengan source yang terdapat pada virus,jika cocok maka akan langsung di anggap virus

Itu sedikit penjelasan tentang antivirus yang akan kita buat sekarang,
yuk langsung saja kita mulai membuat antivirus nya
saya akan berikan source code fullnya pada akhir postingan

-------------------------------------------
Author : Dias Taufik Rahman a.k.a mydisha
Compiller : Microsoft Visual Basic 6.0
Program Type : Antivirus
Source Code : Yes
-------------------------------------------

1.Buka program microsoft visual basic 6.0 -> Standard EXE -> OK
maka akan tampil form baru sesuai dengan gambar di bawah,desain form sesuai keinginan anda

SPOILER: HIDE

Beri nama form tersebut : frmUtama

2.Setelah form selesai di rubah namanya tambahkan component Mscomctl.Ocx dengan cara
Klik Project -> Components -> Microsoft Windows Common Controls 6.0 -> lalu klik OK
Contoh seperti gambar di bawah

SPOILER: HIDE

3.Setelah component sukses di tambahkan langkah selanjutnya adalah menambah Command Button,Textbox,Listview,Picture Box
disini saya menggunakan desain yang sangat sederhana,desain bisa anda rubah sendiri sesuai kreatifitas anda ^^

- Tambahkan Listview kedalam form dan beri nama lvScan

SPOILER: HIDE

yang saya lingkari merah adalah listview yang telah di tambahkan ke dalam form.

setelah itu setting listview dengan cara
Klik Listview -> Disebelah kanan bawah ada kotak properties -> Custom
lalu ikuti settingan seperti pada gambar di bawah ini

SPOILER: HIDE

Lalu pada tab Column Headers klik insert column
- Column 1 beri nama : Virus Name
- Column 2 beri nama : Path
- Column 3 beri nama : Checksum Virus
- Column 4 beri nama : Status Virus
lalu klik Ok

Tambahkan picture box buat picture box itu sekecil mungkin dan beri nama sIcon
Setting :
Appearance : Flat
Auto Redraw : True
Border Style : None
Visible : False

Tambahkan Textbox ke dalam form dengan nama txtPath
Setting :
Appearance : Flat
Border Style : None

Tambahkan Command Button dengan nama cmdBrowse di samping Textbox yang telah di buat tadi
Setting :
Caption : ...

Masukan Code ini ke dalam cmdBrowse

Code:

Dim Pathnya As String
Pathnya = ""
Pathnya = BrowseFolder("Pilih folder yang akan di Scan:", Me)
If Pathnya <> "" Then
txtPath.Text = Pathnya
End If

Code di atas berfungsi untuk membuka kotak dialog yang berisi path" yang ada di dalam komputer lalu mencetaknya ke dalam textbox yang bernama txtPath

Tambahkan label dengan nama default
Setting :
Caption : Dir Scanned

Tambahkan label dengan nama lblDirScan
Setting :
Caption : 0

Tambahkan label dengan nama default
Setting :
Caption : Detected

Tambahkan label dengan nama lblFileDet
Setting :
Caption : 0

Tambahkan label dengan nama default
Setting :
Caption : File Scanned

Tambahkan label dengan nama lblFileScan
Setting :
Caption : 0

Tambahkan Textbox dengan nama txtFileScan
Setting :
Multiline : True
Scroll Bar : 2-Vertical

Tambahkan Command Button dengan nama cmdScan
Setting :
Caption : &Scan

Code:

If cmdScan.Caption = "Scan" Then
Pathnya = txtPath.Text
If Mid(Pathnya, 2, 1) <> ":" Or Pathnya = "" Then
MsgBox "Direktori Tidak Ditemukan", vbCritical, "Error"
Exit Sub
Else
lvScan.Enabled = False
cmdEnable False, False, False
clear_log
cmdScan.Caption = "Stop"
StopScan = False
FindFilesEx txtPath.Text, CBool(chkSubDir.Value)
MsgBox "Scan finished !" & vbNewLine & vbNewLine & "Total Dir Scanned = " & lblDirScan.Caption & _
        vbNewLine & "Total File Scanned = " & lblFileScan.Caption & vbNewLine & "Total File Detected = " & lblFileDet.Caption, vbInformation, "Finish"
If lblFileDet.Caption <> "0" Then
cmdEnable True, True, True
Else
cmdEnable False, False, True
End If
lvScan.Enabled = True
cmdScan.Caption = "Scan"
End If
Else
cmdScan.Caption = "Scan"
StopScan = True
End If

fungsi kode di atas adalah untuk memulai scan pada antivirus

Tambahkan Command Button dengan nama cmdAction
Setting :
Caption : &Delete

Tambahkan Command Button dengan nama cmdAction
Setting :
Caption : &Quarantine

Tambahkan Command Button dengan nama cmdViewQ
Setting :
Caption : &View Quarantine File

Tambahkan Command Button dengan nama cmdAction
Setting :
Caption : &Delete

Tambahkan kode ini di dalamnya

Code:

Dim DftrFile As String
DftrFile = GetSelected(lvScan)
If DftrFile = "" Then
MsgBox "No Detected File(s) Selected", vbCritical, ""
Exit Sub
End If
Select Case Index
Case 0
clean = Action(DftrFile, lvScan, "D")
MsgBox clean & " File(s) has been deleted"
Case 1
clean = Action(DftrFile, lvScan, "Q")
MsgBox clean & " File(s) has been quarantine"
End Select

Fungsi di atas adalah fungsi untuk menghapus/mengkarantina file yang terdeteksi

Tambahkan Command Button dengan nama cmdAction
Setting :
Caption : &Quarantine

Tambahkan Command Button dengan nama cmdViewQ
Setting :
Caption : &View Quarantine File

Lalu masukan code ini ke dalamnya

Code:

frmQuarantine.Show , Me
frmUtama.Enabled = False

Code di atas berfungsi untuk memunculkan form quarantine dan meng enabled form utama

nah selesai untuk memasukan control ke dalam formnya
contoh form yang telah selesai

SPOILER: HIDE

lalu klik kanan pada form masukan kode di bawah ini

Code:

Private Sub lvScan_ItemCheck(ByVal Item As MSComctlLib.ListItem)
UnSelect lvScan, "Di Karantina"
UnSelect lvScan, "Di Hapus"
End Sub

Private Function cmdEnable(hapus As Boolean, Quarantine As Boolean, openQuarantine As Boolean)
cmdAction(0).Enabled = hapus
cmdAction(1).Enabled = Quarantine
cmdViewQ.Enabled = openQuarantine
End Function

Private Function clear_log()
lblDirScan.Caption = 0
lblFileScan.Caption = 0
lblFileDet.Caption = 0
lvScan.ListItems.Clear
jumlahDir = 0
jumlahFile = 0
jumlahVirus = 0
End Function

lalu di Form_load() masukan kode ini

Code:

On Error Resume Next
MkDir "Quarantine"
BuildDatabase

Lalu buatlah 1 module dengan nama modAPI

Lalu tambahkan code di bawah ini

Code:

Public Declare Function FindFirstFile Lib "kernel32" Alias "FindFirstFileA" (ByVal lpFileName As String, lpFindFileData As WIN32_FIND_DATA) As Long
Public Declare Function FindNextFile Lib "kernel32" Alias "FindNextFileA" (ByVal hFindFile As Long, lpFindFileData As WIN32_FIND_DATA) As Long
Public Declare Function FindClose Lib "kernel32" (ByVal hFindFile As Long) As Long
Public Declare Function PathIsDirectory Lib "shlwapi.dll" Alias "PathIsDirectoryA" (ByVal pszPath As String) As Long
Public Declare Function CopyFile Lib "kernel32.dll" Alias "CopyFileA" (ByVal lpExistingFileName As String, ByVal lpNewFileName As String, ByVal bFailIfExists As Long) As Long
Public Declare Function MoveFile Lib "kernel32.dll" Alias "MoveFileA" (ByVal lpExistingFileName As String, ByVal lpNewFileName As String) As Long
Public Declare Function DeleteFile Lib "kernel32" Alias "DeleteFileA" (ByVal lpFileName As String) As Long
Public Declare Function PathFileExists Lib "shlwapi.dll" Alias "PathFileExistsA" (ByVal pszPath As String) As Long
Public Declare Function GetSystemDirectory Lib "kernel32.dll" Alias "GetSystemDirectoryA" (ByVal lpBuffer As String, ByVal nSize As Long) As Long
Public Declare Function GetWindowsDirectory Lib "kernel32.dll" Alias "GetWindowsDirectoryA" (ByVal lpBuffer As String, ByVal nSize As Long) As Long
Public Declare Function SHGetPathFromIDList Lib "shell32.dll" Alias "SHGetPathFromIDListA" (ByVal pidl As Long, ByVal pszPath As String) As Long
Public Declare Function SHBrowseForFolder Lib "shell32.dll" Alias "SHBrowseForFolderA" (lpBrowseInfo As BROWSEINFO) As Long
Private Declare Function RealizePalette Lib "gdi32" (ByVal hDC As Long) As Long
Public Declare Function CreateFile Lib "kernel32" Alias "CreateFileA" (ByVal lpFileName As String, ByVal dwDesiredAccess As Long, ByVal dwShareMode As Long, lpSecurityAttributes As Any, ByVal dwCreationDisposition As Long, ByVal dwFlagsAndAttributes As Long, ByVal hTemplateFile As Long) As Long
Public Declare Function CloseHandle Lib "kernel32" (ByVal hObject As Long) As Long
Public Declare Function GetFileSize Lib "kernel32" (ByVal hFile As Long, lpFileSizeHigh As Long) As Long
Public Declare Function VirtualAlloc Lib "kernel32" (lpAddress As Any, ByVal dwSize As Long, ByVal flAllocationType As Long, ByVal flProtect As Long) As Long
Public Declare Function ReadFile Lib "kernel32" (ByVal hFile As Long, lpBuffer As Any, ByVal nNumberOfBytesToRead As Long, lpNumberOfBytesRead As Long, lpOverlapped As Any) As Long
Public Declare Function WriteFile Lib "kernel32" (ByVal hFile As Long, lpBuffer As Any, ByVal nNumberOfBytesToWrite As Long, lpNumberOfBytesWritten As Long, lpOverlapped As Any) As Long
Public Declare Function SetFilePointer Lib "kernel32" (ByVal hFile As Long, ByVal lDistanceToMove As Long, lpDistanceToMoveHigh As Long, ByVal dwMoveMethod As Long) As Long
Public Declare Function SetEndOfFile Lib "kernel32" (ByVal hFile As Long) As Long

Public Const GENERIC_READ = &H80000000
Public Const GENERIC_WRITE = &H40000000
Public Const FILE_SHARE_READ = &H1
Public Const OPEN_EXISTING = 3
Public Const FILE_ATTRIBUTE_NORMAL = &H80
Public Const INVALID_HANDLE_VALUE = -1
Public Const FILE_END = 2
Public Const FILE_BEGIN = 0
Public Const FILE_CURRENT = 1
Public Const LWA_COLORKEY = &H1
Public Const GWL_EXSTYLE = (-20)
Public Const WS_EX_LAYERED = &H80000
Public Const MAX_PATH = 260
Public Const SW_SHOWNORMAL = 1

Public Type FileTime
    dwLowDateTime       As Long
    dwHighDateTime      As Long
End Type

Public Type WIN32_FIND_DATA
    dwFileAttributes    As Long
    ftCreationTime      As FileTime
    ftLastAccessTime    As FileTime
    ftLastWriteTime     As FileTime
    nFileSizeHigh       As Long
    nFileSizeLow        As Long
    dwReserved0         As Long
    dwReserved1         As Long
    cFileName           As String * MAX_PATH
    cAlternate          As String * 14
End Type

Type BROWSEINFO
     hOwner As Long
     pidlRoot As Long
     pszDisplayName As String
     lpszTitle As String
     ulFlags As Long
     lpfn As Long
     lParam As Long
     iImage As Long
End Type

'untuk browse folder
Public Function BrowseFolder(ByVal aTitle As String, ByVal aForm As Form) As String
Dim bInfo As BROWSEINFO
Dim rtn&, pidl&, path$, pos%
Dim BrowsePath As String
bInfo.hOwner = aForm.hWnd
bInfo.lpszTitle = aTitle
bInfo.ulFlags = &H1
pidl& = SHBrowseForFolder(bInfo)
path = Space(512)
t = SHGetPathFromIDList(ByVal pidl&, ByVal path)
pos% = InStr(path$, Chr$(0))
BrowseFolder = Left(path$, pos - 1)
If Right$(Browse, 1) = "\" Then
    BrowseFolder = BrowseFolder
    Else
    BrowseFolder = BrowseFolder + "\"
End If
If Right(BrowseFolder, 2) = "\\" Then BrowseFolder = Left(BrowseFolder, Len(BrowseFolder) - 1)
If BrowseFolder = "\" Then BrowseFolder = ""
End Function

Public Function StripNulls(ByVal OriginalStr As String) As String
    If (InStr(OriginalStr, Chr$(0)) > 0) Then
        OriginalStr = Left$(OriginalStr, InStr(OriginalStr, Chr(0)) - 1)
    End If
    StripNulls = OriginalStr
End Function

'fungsi untuk menentukan file script atau bukan
Public Function IsScript(Filename As String) As Boolean
IsScript = False
ext = Split("|vbs|vbe", "|")
For i = 1 To UBound(ext)
If LCase(Right(Filename, 3)) = LCase(ext(i)) Then IsScript = True
Next
End Function

Code di atas adalah Fungsi API yang di butuhkan untuk antivirus

Buat 1 module dengan nama modChecksum
masukan code di bawah ini

Code:

Public Function GetChecksum(FilePath As String) As String
Dim CheckSum(1 To 2) As String
CheckSum(1) = CalcBinary(FilePath, 499, 4500)
CheckSum(2) = CalcBinary(FilePath, 499, 4000)
GetChecksum = CheckSum(1) & CheckSum(2)
End Function
Public Function CalcBinary(ByVal lpFileName As String, ByVal lpByteCount As Long, Optional ByVal StartByte As Long = 0) As String
On Error GoTo err
Dim Bin() As Byte
Dim ByteSum As Long
Dim i As Long
ReDim Bin(lpByteCount) As Byte
Open lpFileName For Binary As #1
    If StartByte = 0 Then
        Get #1, , Bin
    Else
        Get #1, StartByte, Bin
    End If
Close #1
For i = 0 To lpByteCount
    ByteSum = ByteSum + Bin(i) ^ 2
Next i
CalcBinary = Hex$(ByteSum)
Exit Function
err:
CalcBinary = "00"
End Function

potongan code di atas di gunakan untuk meng kalkulasi checksum

buat 1 module lagi dengan nama modDatabase
lalu tambahkan code di bawah ini

Code:

Public VirusDB(5), IconDB(48), Bahaya(5) As String
Public Sub BuildDatabase()
Call Checksum_DB
Call IconCompare_DB
Call Script_DB
End Sub
Private Sub Checksum_DB()
VirusDB(1) = "Alman.A|8911D290F723"
VirusDB(2) = "Malingsi.A|A6292EA60230"
VirusDB(3) = "Conficker.A|9EC112ABB2F3"
VirusDB(4) = "N4B3.A|B5CCD36CDB98"
VirusDB(5) = "N4B3.B|A1FE6D6DBE07"
End Sub
Public Sub IconCompare_DB()
On Error Resume Next
IconDB(1) = "20938B2"
IconDB(2) = "19F4ED6"
IconDB(3) = "133BE0B"
IconDB(4) = "18EDEAE"
IconDB(5) = "1EF89C2"
IconDB(6) = "1C915FF"
IconDB(7) = "24563C4"
IconDB(8) = "1B2DB74"
IconDB(9) = "208EA72"
IconDB(10) = "22A064D"
IconDB(11) = "19B64EE"
IconDB(12) = "1D4B7E1"
IconDB(13) = "2087762"
IconDB(14) = "29C7258"
IconDB(15) = "1B18705"
IconDB(16) = "1B5FCAB"
IconDB(17) = "126D4CF"
IconDB(18) = "1C58E5C"
IconDB(19) = "15D7730"
IconDB(20) = "1FB82B7"
IconDB(21) = "112763E"
IconDB(22) = "2165AF9"
IconDB(23) = "25F46BE"
IconDB(24) = "206556B"
IconDB(25) = "22A8D69"
IconDB(26) = "19237F8"
IconDB(27) = "15022B4"
IconDB(28) = "1D8B4EB"
IconDB(29) = "1DBC1EA"
IconDB(30) = "2333F5D"
IconDB(31) = "1F37C2F"
IconDB(32) = "1C9CCA4"
IconDB(33) = "1DFDFB4"
IconDB(34) = "1C1283E"
IconDB(35) = "1F6598C"
IconDB(36) = "27F4C1A"
IconDB(37) = "22F92E0"
IconDB(38) = "191DBDC"
IconDB(39) = "27BFE4A"
IconDB(40) = "20E0907"
IconDB(46) = "2FA4C88"
IconDB(47) = "25AA630"
IconDB(48) = "1DE28E2"
End Sub
Public Sub Script_DB()
On Error Resume Next
    Bahaya(1) = "Scripting.FileSystemObject|Wscript.ScriptFullName|WScript.Shell|.regwrite|.copy"
    Bahaya(2) = "Wscript.ScriptFullName|createobject|strreverse|.regwrite"
    Bahaya(3) = "createobject|Wscript.ScriptFullName|.regwrite|[autorun]"
    Bahaya(4) = "createobject|Wscript.ScriptFullName|specialfolder|.regwrite"
    Bahaya(5) = "chr(asc(mid(|createobject|Wscript.ScriptFullName|.GetFolder|.RegWrite"
End Sub

potongan code di atas adalah database pada antivirusnya

buat lagi 1 buah module dengan nama modQuar
masukan code yang ada di bawah ini

Code:

Option Explicit
Public Function EncodeFile(SourceFile As String, DestFile As String)
    Dim ByteArray() As Byte, Filenr As Integer
    Filenr = FreeFile
    Open SourceFile For Binary As #Filenr
        ReDim ByteArray(0 To LOF(Filenr) - 1)
        Get #Filenr, , ByteArray()
    Close #Filenr
    Call Coder(ByteArray())
    If (PathFileExists(DestFile)) <> 0 Then DeleteFile DestFile
    Open DestFile For Binary As #Filenr
        Put #Filenr, , ByteArray()
    Close #Filenr
End Function
Public Function DecodeFile(SourceFile As String, DestFile As String)
    Dim ByteArray() As Byte, Filenr As Integer
    Filenr = FreeFile
    Open SourceFile For Binary As #Filenr
        ReDim ByteArray(0 To LOF(Filenr) - 1)
        Get #Filenr, , ByteArray()
    Close #Filenr
    Call DeCoder(ByteArray())
    If (PathFileExists(DestFile)) <> 0 Then DeleteFile DestFile
    Open DestFile For Binary As #Filenr
        Put #Filenr, , ByteArray()
    Close #Filenr
End Function
Private Sub Coder(ByteArray() As Byte)
    Dim x As Long
    Dim Value As Integer
    Value = 0
    For x = 0 To UBound(ByteArray)
        Value = Value + ByteArray(x)
        If Value > 255 Then Value = Value - 256
        ByteArray(x) = Value
    Next
End Sub
Private Sub DeCoder(ByteArray() As Byte)
    Dim x As Long
    Dim Value As Integer
    Dim newValue As Integer
    newValue = 0
    For x = 0 To UBound(ByteArray)
        Value = newValue
        newValue = ByteArray(x)
        Value = ByteArray(x) - Value
        If Value < 0 Then Value = Value + 256
        ByteArray(x) = Value
    Next
End Sub

Code di atas adalah code untuk enkripsi/dekripsi pada virus yang akan di karantina

Buat lagi 1 module dengan nama modHeuristic
lalu masukan code di bawah ini

Code:

Private Declare Function ExtractIconEx Lib "shell32.dll" Alias "ExtractIconExA" (ByVal lpszFile As String, ByVal nIconIndex As Long, ByRef phiconLarge As Long, ByRef phiconSmall As Long, ByVal nIcons As Long) As Long
Private Declare Function DestroyIcon Lib "user32.dll" (ByVal hIcon As Long) As Long
Private Declare Function DrawIconEx Lib "user32" (ByVal hDC As Long, ByVal xLeft As Long, ByVal yTop As Long, ByVal hIcon As Long, ByVal cxWidth As Long, ByVal cyWidth As Long, ByVal istepIfAniCur As Long, ByVal hbrFlickerFreeDraw As Long, ByVal diFlags As Long) As Boolean
Private Declare Function ExtractIcon Lib "shell32.dll" Alias "ExtractIconA" (ByVal hInst As Long, ByVal lpszExefileName As String, ByVal nIconIndex As Long) As Long
Private Const DI_MASK = &H1
Private Const DI_IMAGE = &H2
Private Const DI_NORMAL = &H3
Private Const DI_COMPAT = &H4
Private Const DI_DEFAULTSIZE = &H8
Private Const SHGFI_DISPLAYNAME = &H200
Private Const SHGFI_EXETYPE = &H2000
Private Const SHGFI_SYSICONINDEX = &H4000
Private Const SHGFI_LARGEICON = &H0
Private Const SHGFI_SMALLICON = &H1
Private Const ILD_TRANSPARENT = &H1
Private Const SHGFI_SHELLICONSIZE = &H4
Private Const SHGFI_TYPENAME = &H400
Private Const BASIC_SHGFI_FLAGS = SHGFI_TYPENAME Or SHGFI_SHELLICONSIZE Or SHGFI_SYSICONINDEX Or SHGFI_DISPLAYNAME Or SHGFI_EXETYPE
Private SIconInfo As SHFILEINFO
Private SectionHeaders() As IMAGE_SECTION_HEADER
Dim i As Integer
Dim j As Integer
Public Function CekHeuristic(Filename As String)
CekHeuristic = ""
On Error GoTo hError
Dim hFile As Long, bRW As Long
Dim DOSheader As IMAGE_DOS_HEADER
Dim NTHeaders As IMAGE_NT_HEADERS
Dim Filedata As String
DOS_HEADER_INFO = ""
NT_HEADERS_INFO = ""
hFile = CreateFile(Filename, ByVal (GENERIC_READ Or GENERIC_WRITE), FILE_SHARE_READ, ByVal 0&, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, ByVal 0)
ReadFile hFile, DOSheader, Len(DOSheader), bRW, ByVal 0&
SetFilePointer hFile, DOSheader.e_lfanew, 0, 0
ReadFile hFile, NTHeaders, Len(NTHeaders), bRW, ByVal 0&
If NTHeaders.Signature <> IMAGE_NT_SIGNATURE Then
If IsScript(Filename) = True Then
Open Filename For Binary As #1
Filedata = Space$(LOF(1))
Get #1, , Filedata
Close #1
CekHeuristic = CekHeur(Filedata)
End If
Exit Function
End If
CekHeuristic = CekIconBinary(Filename)
hError:
End Function
Private Function CekHeur(Data As String)
Dim hsl, asl As Integer
strasli = LCase(Replace(Data, vbNewLine, "$"))
For i = 1 To UBound(Bahaya)
hsl = 0
strData = Split(Bahaya(i), "|")
asl = 0
For k = 0 To UBound(strData)
xxx = LCase(strData(k))
If InStr(strasli, xxx) > 0 Then hsl = hsl + 1
asl = asl + 1
Next
If hsl = asl Then
CekHeur = "Malicious-Script"
Exit Function
End If
Next
CekHeur = ""
End Function
Private Function CekIconBinary(PathFile As String)
Dim q As Integer
Dim IconIDNow As String
        CekIconBinary = ""
    IconIDNow = CalcIcon(PathFile)
    If IconIDNow = "" Then Exit Function
        For q = 1 To UBound(IconDB)
            If IconDB(q) = IconIDNow Then
                CekIconBinary = "Malicious-Icon"
                Exit Function
            End If
        Next q
End Function
Private Function CalcBinary(ByVal lpFileName As String, ByVal lpByteCount As Long, Optional ByVal StartByte As Long = 0) As String
Dim Bin() As Byte
Dim ByteSum As Long
Dim i As Long
ReDim Bin(lpByteCount) As Byte
Open lpFileName For Binary As #1
    If StartByte = 0 Then
        Get #1, , Bin
    Else
        Get #1, StartByte, Bin
    End If
Close #1
For i = 0 To lpByteCount
    ByteSum = ByteSum + Bin(i) ^ 2
Next i
CalcBinary = Hex$(ByteSum)
End Function
Private Function CalcIcon(ByVal lpFileName As String) As String
Dim PicPath As String
Dim ByteSum As String
Dim IconExist As Long
Dim hIcon As Long
IconExist = ExtractIconEx(lpFileName, 0, ByVal 0&, hIcon, 1)
If IconExist <= 0 Then
    IconExist = ExtractIconEx(lpFileName, 0, hIcon, ByVal 0&, 1)
    If IconExist <= 0 Then Exit Function
End If
frmUtama.sIcon.BackColor = vbWhite
DrawIconEx frmUtama.sIcon.hDC, 0, 0, hIcon, 0, 0, 0, 0, DI_NORMAL
DestroyIcon hIcon
PicPath = Environ$("windir") & "\tmp.tmp"
SavePicture frmUtama.sIcon.Image, PicPath
ByteSum = CalcBinary(PicPath, FileLen(PicPath))
DeleteFile PicPath
CalcIcon = ByteSum
End Function

Fungsi di atas adalah fungsi untuk mengecek suatu file dengan metode heuristic icon + heuristic untuk virus VBS

Buat 1 module dengan nama modIconCompare
lalu masukan code di bawah ini

Code:

Option Explicit
Private Const SHGFI_DISPLAYNAME = &H200, SHGFI_EXETYPE = &H2000, SHGFI_SYSICONINDEX = &H4000, SHGFI_LARGEICON = &H0, SHGFI_SMALLICON = &H1, SHGFI_SHELLICONSIZE = &H4, SHGFI_TYPENAME = &H400, ILD_TRANSPARENT = &H1, BASIC_SHGFI_FLAGS = SHGFI_TYPENAME Or SHGFI_SHELLICONSIZE Or SHGFI_SYSICONINDEX Or SHGFI_DISPLAYNAME Or SHGFI_EXETYPE
Public Type SHFILEINFO
    hIcon As Long: iIcon As Long: dwAttributes As Long: szDisplayName As String * MAX_PATH: szTypeName As String * 80
End Type
Private Declare Function SHGetFileInfo Lib "shell32.dll" Alias "SHGetFileInfoA" (ByVal pszPath As String, ByVal dwFileAttributes As Long, psfi As SHFILEINFO, ByVal cbSizeFileInfo As Long, ByVal uFlags As Long) As Long
Private Declare Function ImageList_Draw Lib "comctl32.dll" (ByVal himl As Long, ByVal i As Long, ByVal hdcDest As Long, ByVal x As Long, ByVal y As Long, ByVal flags As Long) As Long
Private shinfo As SHFILEINFO, sshinfo As SHFILEINFO
Private Declare Function DrawIconEx Lib "user32.dll" (ByVal hDC As Long, ByVal xLeft As Long, ByVal yTop As Long, ByVal hIcon As Long, ByVal cxWidth As Long, ByVal cyWidth As Long, ByVal istepIfAniCur As Long, ByVal hbrFlickerFreeDraw As Long, ByVal diFlags As Long) As Long
Private SIconInfo As SHFILEINFO

Public Enum IconRetrieve
    ricnLarge = 32
    ricnSmall = 16
End Enum

Public Sub RetrieveIcon(fName As String, DC As PictureBox, icnSize As IconRetrieve)
    Dim hImgSmall, hImgLarge As Long
    Debug.Print fName
    Select Case icnSize
    Case ricnSmall
        hImgSmall = SHGetFileInfo(fName$, 0&, shinfo, Len(shinfo), BASIC_SHGFI_FLAGS Or SHGFI_SMALLICON)
        Call ImageList_Draw(hImgSmall, shinfo.iIcon, DC.hDC, 0, 0, ILD_TRANSPARENT)
    Case ricnLarge
        hImgLarge& = SHGetFileInfo(fName$, 0&, shinfo, Len(shinfo), BASIC_SHGFI_FLAGS Or SHGFI_LARGEICON)
        Call ImageList_Draw(hImgLarge, shinfo.iIcon, DC.hDC, 0, 0, ILD_TRANSPARENT)
    End Select
End Sub
Public Function ExtractIcon(Filename As String, AddtoImageList As ImageList, PictureBox As PictureBox, PixelsXY As IconRetrieve, iKey As String) As Long
    Dim SmallIcon As Long
    Dim NewImage As ListImage
    Dim IconIndex As Integer
    On Error GoTo Load_New_Icon
    If iKey <> "Application" And iKey <> "Shortcut" Then
        ExtractIcon = AddtoImageList.ListImages(iKey).Index
        Exit Function
    End If
Load_New_Icon:
    On Error GoTo Reset_Key
    RetrieveIcon Filename, PictureBox, PixelsXY
    IconIndex = AddtoImageList.ListImages.Count + 1
    Set NewImage = AddtoImageList.ListImages.Add(IconIndex, iKey, PictureBox.Image)
    ExtractIcon = IconIndex
    Exit Function
Reset_Key:
    iKey = ""
    Resume
End Function
Public Sub GetLargeIcon(icPath$, pDisp As PictureBox)
Dim hImgLrg&: hImgLrg = SHGetFileInfo(icPath$, 0&, SIconInfo, Len(SIconInfo), BASIC_SHGFI_FLAGS Or SHGFI_LARGEICON)
ImageList_Draw hImgLrg, SIconInfo.iIcon, pDisp.hDC, 0, 0, ILD_TRANSPARENT
End Sub

kode di atas di butuhkan untuk metode heuristic icon pada antivirus

Buat 1 module dengan nama modLV
lalu masukan code di bawah ini

Code:

Public Function GetSelected(TheLV As ListView)
Dim Sel As String
For i = 1 To TheLV.ListItems.Count
If TheLV.ListItems.Item(i).Checked = True Then
Sel = Sel & "|" & TheLV.ListItems.Item(i).SubItems(1)
End If
Next
GetSelected = Sel
End Function

Public Function SelectedAll(TheLV As ListView)
For i = 1 To TheLV.ListItems.Count
TheLV.ListItems.Item(i).Checked = True
Next
End Function

Public Function SelectedNone(TheLV As ListView)
For i = 1 To TheLV.ListItems.Count
TheLV.ListItems.Item(i).Checked = False
Next
End Function

Public Function GetIndex(TheLV As ListView, Data As String) As Integer
For i = 1 To TheLV.ListItems.Count
If TheLV.ListItems.Item(i).SubItems(1) = Data Then
GetIndex = i
End If
Next
End Function

Public Function UnSelect(TheLV As ListView, Data As String)
For i = 1 To TheLV.ListItems.Count
If TheLV.ListItems.Item(i).SubItems(3) = Data Then
TheLV.ListItems.Item(i).Checked = False
End If
Next
End Function

Public Function AddDetect(TheLV As ListView, FilePath As String, VirData As String)
With TheLV
If Left(VirData, 9) <> "Malicious" Then
Set lvItm = .ListItems.Add(, , Split(VirData, "|")(0), , frmUtama.ImgSmall.ListImages(1).Index)
lvItm.SubItems(1) = FilePath
lvItm.SubItems(2) = Split(VirData, "|")(1)
lvItm.SubItems(3) = "Virus File"
Else
Set lvItm = .ListItems.Add(, , VirData, , frmUtama.ImgSmall.ListImages(1).Index)
lvItm.SubItems(1) = FilePath
lvItm.SubItems(2) = GetChecksum(FilePath)
lvItm.SubItems(3) = "Virus File"
End If
End With
End Function

Code di atas berguna untuk dengatur Listview pada saat virus terdeteksi

Buat 1 module dengan nama modPE
lalu masukan code di bawah ini

Code:

Public Type IMAGE_DOS_HEADER
    e_magic As Integer
    e_cblp As Integer
    e_cp As Integer
    e_crlc As Integer
    e_cparhdr As Integer
    e_minalloc As Integer
    e_maxalloc As Integer
    e_ss As Integer
    e_sp As Integer
    e_csum As Integer
    e_ip As Integer
    e_cs As Integer
    e_lfarlc As Integer
    e_ovno As Integer
    e_res(1 To 4) As Integer
    e_oemid As Integer
    e_oeminfo As Integer
    e_res2(1 To 10)    As Integer
    e_lfanew As Long
End Type

Public Type IMAGE_SECTION_HEADER
    nameSec As String * 6
    PhisicalAddress As Integer
  
    VirtualSize As Long
    VirtualAddress As Long
    SizeOfRawData As Long
    PointerToRawData As Long
    PointerToRelocations As Long
    PointerToLinenumbers As Long
    NumberOfRelocations As Integer
    NumberOfLinenumbers As Integer
    Characteristics As Long
  
End Type

Public Type IMAGE_DATA_DIRECTORY
    VirtualAddress As Long
    size As Long
End Type

Public Type IMAGE_OPTIONAL_HEADER
    Magic As Integer
    MajorLinkerVersion As Byte
    MinorLinkerVersion As Byte
    SizeOfCode As Long
    SizeOfInitializedData As Long
    SizeOfUninitializedData As Long
    AddressOfEntryPoint As Long
    BaseOfCode As Long
    BaseOfData As Long
    ImageBase As Long
    SectionAlignment As Long
    FileAlignment As Long
    MajorOperatingSystemVersion As Integer
    MinorOperatingSystemVersion As Integer
    MajorImageVersion As Integer
    MinorImageVersion As Integer
    MajorSubsystemVersion As Integer
    MinorSubsystemVersion As Integer
    Win32VersionValue As Long
    SizeOfImage As Long
    SizeOfHeaders As Long
    CheckSum As Long
    Subsystem As Integer
    DllCharacteristics As Integer
    SizeOfStackReserve As Long
    SizeOfStackCommit As Long
    SizeOfHeapReserve As Long
    SizeOfHeapCommit As Long
    LoaderFlags As Long
    NumberOfRvaAndSizes As Long
    DataDirectory(0 To 15) As IMAGE_DATA_DIRECTORY
End Type

Public Type IMAGE_FILE_HEADER
    Machine As Integer
    NumberOfSections As Integer
    TimeDateStamp As Long
    PointerToSymbolTable As Long
    NumberOfSymbols As Long
    SizeOfOptionalHeader As Integer
    Characteristics As Integer
End Type

Public Type IMAGE_NT_HEADERS
    Signature As Long
    FileHeader As IMAGE_FILE_HEADER
    OptionalHeader As IMAGE_OPTIONAL_HEADER
End Type

Public Type IMAGE_EXPORT_DIRECTORY
    Characteristics As Long
    TimeDateStamp As Long
    MajorVersion As Integer
    MinorVersion As Integer
    Name As Long
    Base As Long
    NumberOfFunctions As Long
    NumberOfNames As Long
    AddressOfFunctions As Long
    AddressOfNames As Long
    AddressOfNameOrdinals As Long
End Type

Public Type IMAGE_IMPORT_DESCRIPTOR
    OriginalFirstThunk As Long
    TimeDateStamp As Long
    ForwarderChain As Long
    Name As Long
    FirstThunk As Long
End Type

Public Type IMAGE_IMPORT_BY_NAME
    Hint As Integer
    Name As String * 255
End Type

Public Const IMAGE_SIZEOF_SECTION_HEADER = 40
Public Const IMAGE_DOS_SIGNATURE = &H5A4D
Public Const IMAGE_NT_SIGNATURE = &H4550
Public Const IMAGE_ORDINAL_FLAG = &H80000000

Public Enum SECTION_CHARACTERISTICS
    IMAGE_SCN_LNK_NRELOC_OVFL = &H1000000   'Section contains extended relocations.
    IMAGE_SCN_MEM_DISCARDABLE = &H2000000   'Section can be discarded.
    IMAGE_SCN_MEM_NOT_CACHED = &H4000000    'Section is not cachable.
    IMAGE_SCN_MEM_NOT_PAGED = &H8000000     'Section is not pageable.
    IMAGE_SCN_MEM_SHARED = &H10000000       'Section is shareable.
    IMAGE_SCN_MEM_EXECUTE = &H20000000      'Section is executable.
    IMAGE_SCN_MEM_READ = &H40000000         'Section is readable.
    IMAGE_SCN_MEM_WRITE = &H80000000        'Section is writeable.
End Enum

Public Enum IMAGE_DIRECTORY
    IMAGE_DIRECTORY_ENTRY_EXPORT = 0           ' Export Directory
    IMAGE_DIRECTORY_ENTRY_IMPORT = 1           ' Import Directory
    IMAGE_DIRECTORY_ENTRY_RESOURCE = 2         ' Resource Directory
    IMAGE_DIRECTORY_ENTRY_EXCEPTION = 3        ' Exception Directory
    IMAGE_DIRECTORY_ENTRY_SECURITY = 4         ' Security Directory
    IMAGE_DIRECTORY_ENTRY_BASERELOC = 5        ' Base Relocation Table
    IMAGE_DIRECTORY_ENTRY_DEBUG = 6            ' Debug Directory
    IMAGE_DIRECTORY_ENTRY_ARCHITECTURE = 7     ' Architecture Specific Data
    IMAGE_DIRECTORY_ENTRY_GLOBALPTR = 8        ' RVA of GP
    IMAGE_DIRECTORY_ENTRY_TLS = 9              ' TLS Directory
    IMAGE_DIRECTORY_ENTRY_LOAD_CONFIG = 10     ' Load Configuration Directory
    IMAGE_DIRECTORY_ENTRY_BOUND_IMPORT = 11    ' Bound Import Directory in headers
    IMAGE_DIRECTORY_ENTRY_IAT = 12             ' Import Address Table
    IMAGE_DIRECTORY_ENTRY_DELAY_IMPORT = 13    ' Delay Load Import Descriptors
    IMAGE_DIRECTORY_ENTRY_COM_DESCRIPTOR = 14  ' COM Runtime descriptor
End Enum

code di atas berfungsi untuk pengecekan PE HEADER

buat 1 module dengan nama modScanning
lalu tambahkan code di bawah ini

Code:

Public jumlahDir As Long, jumlahFile As Long, jumlahVirus As Long
Public StopScan As Boolean

Public Function CekVirus(FilePath As String) As String
CekVirus = ""
For i = 1 To UBound(VirusDB)
If GetChecksum(FilePath) = Split(VirusDB(i), "|")(1) Then
CekVirus = VirusDB(i)
Exit Function
End If
Next
If FileLen(FilePath) / 1024 <= 512 Then
CekVirus = CekHeuristic(FilePath)
End If
End Function

Public Sub FindFilesEx(ByVal lpFolderName As String, ByVal SubDirs As Boolean)
    Dim i As Long
    Dim hSearch As Long, WFD As WIN32_FIND_DATA
    Dim Result As Long, CurItem As String
    Dim tempDir() As String, dirCount As Long
    Dim RealPath As String, GetViri As String
  
    GetViri = ""
    dirCount = -1
  
    ScanInfo = "Scan File"
  
    If Right$(lpFolderName, 1) = "\" Then
        RealPath = lpFolderName
    Else
        RealPath = lpFolderName & "\"
    End If
  
    hSearch = FindFirstFile(RealPath & "*", WFD)
    If Not hSearch = INVALID_HANDLE_VALUE Then
        Result = True
        Do While Result
            DoEvents
            If StopScan = True Then Exit Do
            CurItem = StripNulls(WFD.cFileName)
            If Not CurItem = "." And Not CurItem = ".." Then
                If PathIsDirectory(RealPath & CurItem) <> 0 Then
                    jumlahDir = jumlahDir + 1
                    frmUtama.lblDirScan.Caption = jumlahDir
                    If SubDirs = True Then
                        dirCount = dirCount + 1
                        ReDim Preserve tempDir(dirCount) As String
                        tempDir(dirCount) = RealPath & CurItem
                    End If
                Else
                    jumlahFile = jumlahFile + 1
                    frmUtama.lblFileScan.Caption = jumlahFile
                    frmUtama.txtFileScan.Text = RealPath & CurItem
                    frmUtama.txtFileScan.SelStart = Len(frmUtama.txtFileScan.Text)
                    If WFD.nFileSizeLow > 5120 Or WFD.nFileSizeHigh > 5120 Then
                        GetViri = CekVirus(RealPath & CurItem)
                        If GetViri <> "" Then
                        AddDetect frmUtama.lvScan, RealPath & CurItem, GetViri
                        jumlahVirus = jumlahVirus + 1
                        frmUtama.lblFileDet.Caption = jumlahVirus
                        End If
                    End If
                End If
            End If
            Result = FindNextFile(hSearch, WFD)
        Loop
        FindClose hSearch
      
        If SubDirs = True Then
            If dirCount <> -1 Then
                For i = 0 To dirCount
                    FindFilesEx tempDir(i), True
                Next i
            End If
        End If
    End If
End Sub

Code di atas adalah code untuk scan file & folder pada antivirus

buat 1 module dengan nama modEtc
masukan code di bawah ini

Code:

Public Function Action(Data As String, TheLV As ListView, Mode As String)
Dim Filedata() As String
Dim fName, tmp, Status As String
Dim y As Integer
Filedata = Split(Data, "|")
For i = 1 To UBound(Filedata)
a = a + 1
If Mode = "Q" Then
fName = GetFileName(Filedata(i))
EncodeFile Filedata(i), AppPath & "Quarantine\" & Left$(fName, Len(fName) - Len(GetExt(Filedata(i)))) & ".avq"
AddQList TheLV, Filedata(i), Left$(fName, Len(fName) - Len(GetExt(Filedata(i)))) & ".avq"
DeleteFile Filedata(i)
Status = "Di Karantina"
ElseIf Mode = "D" Then
DeleteFile Filedata(i)
Status = "Di Hapus"
End If
y = GetIndex(TheLV, Filedata(i))
With TheLV.ListItems.Item(y)
.SubItems(3) = Status
.Checked = False
.SmallIcon = frmUtama.ImgSmall.ListImages(2).Index
End With
Next
Action = a
End Function

Public Function AddQList(TheLV As ListView, FilePath As String, Source As String)
Dim Dat As String
Dat = AppPath & "Quarantine\HN.dat"
If PathFileExists(Dat) <> 0 Then
Open Dat For Input As #1
Input #1, isi
Close #1
DeleteFile Dat
Else
isi = ""
End If
namavir = TheLV.ListItems(GetIndex(TheLV, FilePath))
If InStrRev(isi, Source, , vbTextCompare) = 0 Then
Open Dat For Output As #2
Print #2, isi & "|" & namavir & "?" & FilePath & "?" & Source
Close #2
Else
Open Dat For Output As #3
Print #3, isi
Close #3
End If
End Function

Public Function GetFileName(PathFile As String) As String
Dim i As Long
Dim DirString As Long
    For i = 1 To Len(PathFile)
        If Mid$(PathFile, i, 1) = "\" Then DirString = i
    Next i
    GetFileName = Right$(PathFile, Len(PathFile) - DirString)
End Function

Public Function GetExt(ByVal lpFileName As String)
Dim sTemp As String
Dim i As Long
sTemp = GetFileName(lpFileName)
    If InStr(lpFileName, ".") Then
        For i = 0 To Len(sTemp) - 1
            If Mid$(sTemp, Len(sTemp) - i, 1) = "." Then
                GetExt = Mid$(sTemp, Len(sTemp) - i, i)
                Exit Function
            End If
        Next i
    End If
End Function

Coatas adalah kumpulan fungsi etc untuk scanning,karantina,delete

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