Malicious Office (OLE) / .DOC — malware analysis report

Static analysis result for SHA-256 8abe053b19bfb289…

MALICIOUS

Office (OLE) / .DOC

37.0 KB Created: 1999-05-27 13:23:00 Authoring application: Microsoft Word 8.0
MD5: 90b0981ff96edafc9055faf74ef3c7cd SHA-1: d57df6ba701849f084307e3e9bd42433a427a88a SHA-256: 8abe053b19bfb289df3027c12721adf020847d60cea5918abde2734fcf732355
220 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment

The file is a Microsoft Word document containing VBA macros, specifically triggering AutoOpen and Auto_Close events. Heuristics indicate the presence of malicious VBA code, and ClamAV detections confirm it as malware. The macros are likely designed to download and execute a secondary payload, as suggested by the ClamAV detections on extracted artifacts.

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.

FilenameKindSourceSize
macros.bas
2e9cd5d70d02e85d614642b675060905ffddadba0079c9e1d77708d458e5896a
vba-macro oletools.olevba.extract_macros (decoded VBA source) 19741 bytes
Detection
ClamAV: Doc.Trojan.Class-1
Obfuscation or payload: unlikely