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

Static analysis result for SHA-256 f1ca1a8389615ed6…

MALICIOUS

Office (OLE) / .EXE

38.0 KB Created: 1999-11-15 08:15:00 Authoring application: Microsoft Word 8.0
MD5: c07b086d88e97dd2243d45c3ca91f61b SHA-1: c8a4924337e09b513d11c50665eea941021b9d1a SHA-256: f1ca1a8389615ed61dbd382faa7206a31bf90fcb78524b301b8b8fc1cd795174
300 Risk Score

Malware Insights

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

The file is an OLE executable containing VBA macros, specifically a Document_Open macro designed to execute upon opening. Heuristics indicate the use of CreateObject and p-code auto-execution, strongly suggesting the macro is designed to download and execute a secondary payload. ClamAV detections of 'Win.Trojan.Psycho-3' and 'Win.Trojan.wmvg-1' on the main file and an extracted artifact respectively, confirm its malicious nature. The document body content appears to be unrelated boilerplate text.

Heuristics 7

  • ClamAV: Win.Trojan.Psycho-3 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Win.Trojan.Psycho-3
  • 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
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • VBA p-code auto-exec with execution tokens high OLE_VBA_PCODE_AUTOEXEC_EXEC
    Compiled VBA/cache stream contains an auto-execution token together with shell/download/object-execution tokens. This catches p-code-only or source-extraction-failure macro documents where visible source is unavailable.
  • 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.

FilenameKindSourceSize
macros.bas
22cca0283f02d34b4645f3703ab6ae44ba6f6bdfabeddc23df4f5ff33ebb403d		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 12823 bytes
Detection
ClamAV: Win.Trojan.wmvg-1
Obfuscation or payload: likely
Carved macro source contains an auto-exec entry point and execution/download terms.

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