Office (OLE) malware analysis — malicious · 858ca5eee2cc675d

MALICIOUS

Office (OLE)

109.5 KB Created: 2010-05-13 15:14:00 Authoring application: Microsoft Word 10.0

MD5: a940d64f09468df80d081477a4fac0ff SHA-1: c0d8a018b604ad94f3324f8d3db3f619190f4058 SHA-256: 858ca5eee2cc675d7cbfc41aa53b2976877d0db3b7d6af604afae0055d76ea07

220 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic for Applications T1566.001 Spearphishing Attachment

The file is a Microsoft Word document containing VBA macros, specifically triggering AutoOpen and Auto_Close heuristics, indicating malicious intent. The document body presents insurance underwriting information, a common lure for social engineering. The presence of VBA macros and the ClamAV detections suggest the document is designed to execute malicious code, likely to download a secondary payload.

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` `eb46ad9af91a649042af9e28115d831b761a47d404163e4ed1849f95ff95b948`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	7382 bytes
Detection ClamAV: Doc.Trojan.Class-1 Obfuscation or payload: unlikely

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