Office (OLE) malware analysis — malicious · b91a41961fde2696

MALICIOUS

Office (OLE)

45.0 KB Created: 1999-05-12 06:29:00 Authoring application: Microsoft Word 8.0

MD5: 407683550399bb8be6bf23a33cb08ac1 SHA-1: bb2d9fdaebbea14c494582e3231a1be7d5df0ee9 SHA-256: b91a41961fde2696eb07d9e216c9f4b9b1f9a3d7f0aff2002a47a953b239145c

220 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV with critical heuristic firings for OLE_VBA_MACROS, OLE_VBA_AUTOOPEN, and OLE_VBA_AUTOCLOSE. The presence of a large VBA macro, specifically an AutoOpen macro, indicates that malicious code is intended to execute automatically when the document is opened. The embedded artifact is a VBA macro, confirming the malicious intent. The document body content appears to be a resume and is not directly related to the malicious functionality, suggesting a lure or decoy.

Heuristics 5

ClamAV: Doc.Trojan.Class-37 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Trojan.Class-37
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.
AutoOpen macro high OLE_VBA_AUTOOPEN

AutoOpen macro
Auto_Close macro high OLE_VBA_AUTOCLOSE

Auto_Close 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` `46720b299ee2e57484e857a4b125fccc7e46ccae83c7400b59584aa50cd88715`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	19113 bytes
Detection ClamAV: Doc.Trojan.Class-1 Obfuscation or payload: unlikely

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