Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 2247794b2db5cb5b…

MALICIOUS

Office (OLE)

39.0 KB Created: 2008-11-10 17:37:00 Authoring application: Microsoft Word 11.5.0
MD5: 88ef093d6623af0ea95e7e2e319d606d SHA-1: 37505b3715fd3c1f38fca19e4311c9b95da9da40 SHA-256: 2247794b2db5cb5bfd11507d85049cd6a2bed4e90f1a757fc383cf2665ceb0e5
180 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 heuristics firing for OLE_VBA_MACROS and OLE_VBA_DOCOPEN, indicating the presence and execution of VBA macros. The embedded VBA macro, named 'macros.bas', is the primary mechanism for the malicious activity. While the specific payload is not detailed, the presence of a Document_Open macro strongly suggests an attempt to automatically execute code upon opening the document, likely to download and run a second-stage payload.

Heuristics 4

  • ClamAV: Doc.Trojan.Marker-40 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.Marker-40
  • 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.

FilenameKindSourceSize
macros.bas
abd4b24aaaa8c7fdb75db109f43b73e90b439eaf9dae4afb1e7fd715c71f3150		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 4253 bytes
Detection
ClamAV: Doc.Trojan.Marker-2
Obfuscation or payload: unlikely

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