Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 8ff4ea6a496893e8…

MALICIOUS

Office (OLE)

7.0 KB First seen: 2012-06-14
MD5: 93ec63929614d0ba86fff72bb5a5f3da SHA-1: 80d54644ee26a8af8a4ef7465defb6dc83364ec9 SHA-256: 8ff4ea6a496893e8f11d16961da8bcf9ab5a43c09557fe83b5f15b11be822a6d
102 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic

The critical ClamAV detection and the presence of legacy WordBasic macro virus markers strongly indicate malicious intent. The document body explicitly mentions "RSN MACRO VIRUS Goat file" and includes various macro-related keywords like AutoOpen, FileClose, and PayLoad, suggesting the file's purpose is to execute malicious macros. The file's age and the explicit mention of 'Antivirus' within the macro names suggest a historical attempt at malware propagation.

Heuristics 3

  • ClamAV: Win.Trojan.Attach-1 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Win.Trojan.Attach-1
  • 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) 871 bytes
SHA-256: 2e9798bbce7ceac66f40049af20e6a47e8a51c745ad34f0667f7da3f50853e55
Preview script
First 1,000 lines of the extracted script
17253 29551 29551   8300    
          -         -    
29797
MAIN
            25701
, -
sMe$ = @cmd8025
sTMacro$ = sMe$ = ":AutoOpen"
@cmd80c2 "Global:Antivirus" , sTMacro$
sTMacro$ = sMe$ = ":FileClose"
@cmd80c2 "Global:FileClose" , sTMacro$
@cmd80a0
MAIN
, -
iMacroCount = @cmd80b7 0 , 0
sMe$ = @cmd8025
sMacro$ = sMe$ = ":FileClose"
@cmd80c2 sMacro$ , "Global:FileClose"
sMacro$ = sMe$ = ":AutoOpen"
@cmd80c2 sMacro$ , "Global:AntiVirus"
i = 1 iMacroCount
@cmd80b8 i , 1 , 1 = "PayLoad"
sMacro$ = "PayLoad"
@cmd00d7 = sMacro$ ,
@cmd00d7 = "Global:PayLoad" ,
@cmd80b8 i , 1 , 1 = "FileSaveAs"
sMacro$ = "FileSaveAs"
@cmd00d7 = sMacro$ ,
@cmd00d7 = "Global:FileSaveAs" ,
@cmd80b8 i , 1 , 1 = "AAAZFS"
sMacro$ = "AAAZFS"
@cmd00d7 = sMacro$ ,
@cmd00d7 = "Global:AAAZFS" ,
@cmd80b8 i , 1 , 1 = "AAAZAO"
sMacro$ = "AAAZAO"
@cmd00d7 = sMacro$ ,
@cmd00d7 = "Global:AAAZAO" ,
i

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