Office (OLE) malware analysis — malicious · 6f74a9f10c8dd5cc

MALICIOUS

Office (OLE)

17.0 KB Created: 1997-02-21 16:22:00 Authoring application: Microsoft Word 6.0 First seen: 2012-06-14

MD5: bab57b7d63a5a50a448a5022b5fdfa9f SHA-1: ff0703683cc056898212d0df28dd37b309eea4ea SHA-256: 6f74a9f10c8dd5ccdc502cb5704e4da87574d96be17fe91e3a8c1564cf115aed

240 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic

The file exhibits characteristics of a legacy WordBasic macro virus, indicated by the 'OLE_LEGACY_WORDBASIC_MACRO_VIRUS' heuristic. The presence of an embedded OLE object with suspicious static findings further supports malicious intent. While no specific family is identified, the macro execution points to an attempt to compromise the system.

Heuristics 4

ClamAV: Win.Trojan.Lunch-6 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Win.Trojan.Lunch-6
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 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.
CFB header with no readable streams medium OLE_PARSE_EMPTY_STREAMS

This finding applies to a carved embedded Office document found at a nonzero offset inside the submitted file, not directly to the top-level document. 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_off00001c40.ole`	embedded-office	Embedded OLE/CFB Office body inside ole container at offset 0x1C40	10176 bytes
SHA-256: `de80a28dffe4edc9e9488fed32c72050ae396b327fe820973418f9d61f20f28b`
Detection ClamAV: Win.Trojan.Lunch-6 Obfuscation or payload: unlikely

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