Office (OLE) malware analysis — malicious · 3a27a72d23e8b2d5

MALICIOUS

Office (OLE)

50.0 KB Created: 2006-08-08 14:03:00 Authoring application: Microsoft Word 10.1

MD5: f4f38123739a708437969290116b4004 SHA-1: e14b9265e02abc7416350d9fbf88936a733bcd3f SHA-256: 3a27a72d23e8b2d5e3e70862ab4109996d700ee692bb9ff6859659f54b988020

180 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic for Applications T1204.002 Malicious File

The sample is an Office document containing VBA macros, specifically a Document_Open macro, which is a common technique for initial execution. The document body presents itself as educational material, a common lure to trick users into enabling macros. The presence of ClamAV detections (Doc.Trojan.Marker-40 and Doc.Trojan.Marker-2) indicates known malicious behavior, likely involving the execution of a second-stage payload. No specific IOCs like URLs or hashes were extracted from the document body or scripts.

Heuristics 4

ClamAV: Doc.Trojan.Marker-40 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Trojan.Marker-40
ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV

ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
Document_Open macro high OLE_VBA_DOCOPEN

Document_Open macro
VBA macros detected medium OLE_VBA_MACROS

Document contains VBA macro code

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `4d840735f64370eed491ae174d4c3cebc63d105512970d4d44c50b8d8ee19f18`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	4261 bytes
Detection ClamAV: Doc.Trojan.Marker-2 Obfuscation or payload: unlikely

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