Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 abdb51a48125bf04…

MALICIOUS

Office (OLE)

6.5 KB First seen: 2012-06-14
MD5: 300dc0837bd1bf4006bfb954fa1f3f37 SHA-1: 5c441c532ad43fc6494c8e9398d82a2daae317cf SHA-256: abdb51a48125bf043eb0a9b2b363406ee732846b8b738a777a41a245738be9b2
102 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic

The critical ClamAV detection and the "OLE_LEGACY_WORDBASIC_MACRO_VIRUS" heuristic firing strongly indicate malicious intent. The document body contains markers typical of older macro viruses, including author information and file paths, suggesting a focus on replication and potential system compromise through legacy macro execution. The SHA256 hash is included as a primary IOC.

Heuristics 3

  • ClamAV: Win.Trojan.MDMA-4 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Win.Trojan.MDMA-4
  • 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) 582 bytes
SHA-256: 37470457a6bfc53d6e54b79c0db79cd63700c8036de428e084db1b6bc5a809ac
Preview script
First 1,000 lines of the extracted script
29551
MAIN
install
infect
install
total = @cmd80b7 0
installed = 0
total 0
i = 1 total
@cmd80b8 i , 0 = "AutoClose"
installed = 1
installed = 0
@cmd80c2 @cmd803b = ":AutoClose" , "Global:AutoClose"
total = @cmd80b7 1
installed = 0
total 0
i = 1 total @cmd80b8 i , 1 = "AutoClose"
installed = 1
installed = 0
@cmd0054 = 1
@cmd80c2 "Global:AutoClose" , @cmd803b = ":AutoClose"
infect
@cmd810c 21 = "Windows" @cmd810c 21 = "Windows NT"
"c:\shmk." 1
@cmd80aa 1 4 @cmd80f2 @cmd80f7 20
1
@cmd800a @cmd80b5 21 , 1 , 3 = "Mac" @cmd80f2 @cmd80f7 4
@cmd80ac "HD:"
count = @cmd80e8
i = 1 count

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