Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 ba5aaf2c62315e49…

MALICIOUS

Office (OLE)

201.6 KB Created: 2007-09-10 16:39:00 Authoring application: Microsoft Office Word21 Normal.dotmyThe following Collective Training information is being pulled from the database and merged in with an existing Word doc…@ꨀ犿ĵ
MD5: d78c2196776fb190813782223a07a8fe SHA-1: e50b77257a6271f466708c337a75abe25b2edf85 SHA-256: ba5aaf2c62315e492430cdc0a49c57e2eb42401b965a73f5031705e941d9a2db
60 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic

The file is an OLE document with a significant amount of slack space, indicating potential obfuscation or appended data. Crucially, it contains VBA macros, flagged as malicious. While the document body appears to be military-related training notes, the presence of macros strongly suggests a malicious intent, likely to download and execute a secondary payload. No specific IOCs were extracted beyond the macro presence itself.

Heuristics 3

  • OLE document has large unaccounted-for region high OLE_SLACK_ANOMALY
    OLE file is 206,454 bytes but its declared streams total only 104,019 bytes — 102,435 bytes (50%) live in unallocated sector slack. This is the canonical hiding place for pre-macro-era Office exploit payloads (XOR-encoded shellcode reached via a parser pointer-corruption bug in the document structure).
  • VBA macros detected medium OLE_VBA_MACROS
    Document contains VBA macro code
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd
    • http://www.w3.org/1999/xhtml

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
9c6bcde570a96d22e67d2e5da40d41bd6dbf827da53f2f005a59667214094ce8		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 828 bytes

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