Win.Trojan.Thebman-2 Office (OLE) malware analysis — malicious · 792d1819772e989a

MALICIOUS

Office (OLE)

21.0 KB Created: 1993-09-28 15:08:00 Authoring application: Microsoft Word for Windows 95 First seen: 2012-06-14

MD5: e18c83e802b24bd7f85726f9d7766b8b SHA-1: aff89fb162af4fbb9cc7d9608059d192f23eb437 SHA-256: 792d1819772e989a7a0a51d55aa88eadd79442fcfafa41d9178a879ad5fb3f31

160 Risk Score

Malware Insights

Win.Trojan.Thebman-2 · confidence 95%

MITRE ATT&CK

T1059.005 Visual Basic

The presence of a legacy WordBasic auto-exec macro marker ('autoopen') and critical heuristics indicating suspicious embedded OLE objects strongly suggest malicious intent. ClamAV detection as 'Win.Trojan.Thebman-2' further supports this. The embedded OLE object is the primary indicator of a potential secondary payload or exploit.

Heuristics 4

ClamAV: Win.Trojan.Thebman-2 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Win.Trojan.Thebman-2
Embedded Office document has suspicious static findings critical EMBEDDED_OFFICE_CHILD_STATIC_TRIAGE

A CFB/OLE Office document was found inside another file type and its carved contents matched Office exploit or payload heuristics. This catches wrapped exploit documents where the top-level file routes to a PE, archive, or generic scanner instead of Office.
Legacy WordBasic auto-exec macro marker medium OLE_LEGACY_WORDBASIC_AUTOEXEC

OLE Word document contains a legacy WordBasic auto-execution marker such as AutoOpen, but no modern VBA project was recovered and no stronger macro-virus family marker was present. This is analyst-facing evidence for old Word macro execution surface, not a downloader or parser-CVE attribution by itself.
CFB header with no readable streams medium OLE_PARSE_EMPTY_STREAMS

The file begins with a valid OLE2/CFB header but exposes no directory streams. A non-empty compound document with an unreadable directory is anomalous — it is seen with truncated/corrupt files and, more importantly, with content deliberately shifted off byte boundaries to defeat parsers while the host application still recovers the object.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_office_off00002100.ole`	embedded-office	Embedded OLE/CFB Office body inside ole container at offset 0x2100	13056 bytes
SHA-256: `355a3cc33d8fa0f020f574c6f81c745fdcc5a3d7c8d132af43e5727a423d7ae6`

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