Office (OLE) malware analysis — malicious · c50de7a405bd7032

MALICIOUS

Office (OLE)

47.5 KB Created: 2009-12-23 18:20:00 Authoring application: Microsoft Word 11.5.0

MD5: 1b455a1a038b279af07028f1b63acd9c SHA-1: a6ad0eeee244d6d610c8eb1b27ff34c27ee6399e SHA-256: c50de7a405bd703232776820c4fa2f137f463fafcc63905f9c5d422b5d34b6e2

220 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious Link T1059.005 Visual Basic

The file contains a high-severity heuristic indicating the presence of an Equation Editor OLE object, a known vector for exploiting vulnerabilities. The presence of VBA macros, specifically a Document_Open macro, further suggests malicious intent. ClamAV detections confirm the file is malicious, identifying it as Doc.Trojan.Thus-8. The document body discusses quadratic functions and geometry, which appears to be a lure to disguise the malicious nature of the file.

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-8 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Trojan.Thus-8
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` `8112eaf30248369ca3ff4ed2c5cb980fa4bf6adccab86df4411dc34ae79507f7`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	2401 bytes
Detection ClamAV: Doc.Trojan.Thus-8 Obfuscation or payload: unlikely

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