Office (OLE) / .DOC malware analysis — malicious · 850481976dbfe8c6

MALICIOUS

Office (OLE) / .DOC

97.5 KB Created: 2010-04-15 17:30:00 Authoring application: Microsoft Office Word

MD5: ca608d7c1e121458dff5429b9027381b SHA-1: 14261e9a62a5fc0599c968f47f5a166270852e6c SHA-256: 850481976dbfe8c6e32d1b2b03dbc1cdfc24fe83519eed1dd62e9a671573efb2

240 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1059.001 PowerShell

The sample is a Microsoft Office document containing VBA macros. The critical heuristic 'OLE_VBA_SHELL' indicates that the macros attempt to execute commands using the Shell() function. This is a common technique for downloading and executing further malicious payloads. The presence of 'macros.bas' as an embedded artifact further supports this. The ClamAV detections 'Doc.Trojan.Marker-31' and 'Doc.Trojan.Marker-1' confirm the malicious nature of the file and its extracted components.

Heuristics 5

Shell() call in VBA critical OLE_VBA_SHELL

Shell() call in VBA
ClamAV: Doc.Trojan.Marker-31 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Trojan.Marker-31
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.
Suspicious extracted artifact high EXTRACTED_FILE_STATIC_TRIAGE

One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
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` `e24fae83f20848abc1f6a66651f2cd0d2334183ade6b9238493870316312185c`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	9820 bytes
Detection ClamAV: Doc.Trojan.Marker-1 Obfuscation or payload: likely Carved macro source contains an auto-exec entry point and execution/download terms.

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