Office (OLE) / .DOC malware analysis — malicious · 930df6b44c36a7b5

MALICIOUS

Office (OLE) / .DOC

90.0 KB Created: 2009-12-16 11:01:00 Authoring application: Microsoft Word 10.0

MD5: 8edca3f6e0910f63206c966b45b3e6d3 SHA-1: 6b643d696f71d5872907cd43af55197702f1ad9f SHA-256: 930df6b44c36a7b532c2f21988f6811a4cf299e6b8eeeaa64daccd332cf21048

240 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1059.001 PowerShell

The file is a Microsoft Word document containing what appears to be a medical report. Heuristics indicate the presence of VBA macros and a critical finding of a Shell() call within the VBA code. ClamAV detections further confirm its malicious nature. The presence of VBA macros and the Shell() call suggests the document is designed to execute arbitrary commands upon macro enablement, likely to download and run a secondary payload. The specific medical report content serves as a pretext to encourage macro execution.

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` `cbad5ac8e5c7df8fc600c90a3d2e7ab55657e8eaff7b1f69983fc4be9793448a`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	5509 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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