Office (OLE) malware analysis — malicious · 3c441bd29d2547fd

MALICIOUS

Office (OLE)

41.5 KB Created: 2010-08-31 15:10:00 Authoring application: Microsoft Word 10.1

MD5: ef273052b6a1b218e7e0b03f6cc4b8d7 SHA-1: ec7adffcd3c62ab949634d25c03104cfeb2e407a SHA-256: 3c441bd29d2547fd8b4c1493564e0e690c4d6417ba7f9baff5c684b133978563

220 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1559.002 Component Object Model Hijacking T1059.005 Visual Basic

The file is identified as malicious by ClamAV with the signature Doc.Trojan.Thus-5. Static analysis revealed a malicious Equation Editor OLE object and VBA macros, specifically a Document_Open macro, indicating an attempt to execute code upon opening. The document body presents as a calculus worksheet to deceive the user.

Heuristics 5

Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR

Contains Equation Editor object — related to CVE-2017-11882 / CVE-2018-0802 exploitation, but CLSID presence alone is not the malformed MTEF exploit primitive.
ClamAV: Doc.Trojan.Thus-5 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Trojan.Thus-5
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` `bf650797b00819a83809489545675120fbf46357fe98ad78f8266dea4b646eed`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	2358 bytes
Detection ClamAV: Doc.Trojan.Thus-5 Obfuscation or payload: unlikely

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