Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 e88e52a56f4c7f13…

MALICIOUS

Office (OLE)

91.5 KB Created: 2002-11-14 13:06:00 Authoring application: Microsoft Word 9.0
MD5: 181758508e704ab2a5929c91fc5fbcfc SHA-1: 89511695e2d281ecfb190a577078755f2a545250 SHA-256: e88e52a56f4c7f13d98bf729c16ac938130b2bdf447fa9baffd96a9eb3c30d9c
300 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.001 PowerShell T1204.002 Malicious File

The file is identified as malicious by ClamAV with multiple signatures, including Win.Trojan.Psycho-3 and Doc.Trojan.Melissa-4. High-severity heuristics indicate the presence of VBA macros, specifically a Document_Open macro that uses CreateObject, suggesting it's designed to execute automatically. The primary function appears to be downloading and executing a secondary payload, as indicated by the auto-execution of VBA code.

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
da0348ca234273a8391dc43c8349f60d3e2187bc61a001ca64f2ededcbc2de8e		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 12869 bytes
Detection
ClamAV: Doc.Trojan.Melissa-4
Obfuscation or payload: likely
Carved macro source contains an auto-exec entry point and execution/download terms.

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