Win.Trojan.Wazzu-18 — Office (OLE) malware analysis

Static analysis result for SHA-256 72234cba96150951…

MALICIOUS

Office (OLE)

6.0 KB First seen: 2012-06-14
MD5: dd2b4f3ee3f551c9d111fa5dc1785800 SHA-1: 9b80c7f4fd35d84f34d3e8adbdecc2f283c5b61d SHA-256: 72234cba961509518f7dcf704e40a538f486d08a3cf6696056eb3454433a6197
102 Risk Score

Malware Insights

Win.Trojan.Wazzu-18 · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic

The sample exhibits characteristics of a legacy WordBasic macro virus, specifically identified by ClamAV as Win.Trojan.Wazzu-18. The document body contains explicit markers like 'RSN MACRO VIRUS Goat file' and references to 'autoOpen' and 'MAIN' macros, which are typical of older macro-based malware. These elements strongly suggest the file's purpose is to execute malicious code upon opening.

Heuristics 3

  • ClamAV: Win.Trojan.Wazzu-18 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Win.Trojan.Wazzu-18
  • 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) 311 bytes
SHA-256: a7f97ebddfe0df05731bc7796c591c479190f9095b5ef41bb392344db70a660a
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$
* bye
@cmd7468
, - * 0

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