Doc.Trojan.Melissa-7 — Office (OLE) malware analysis

Static analysis result for SHA-256 57f44410a0589036…

MALICIOUS

Office (OLE)

32.0 KB Created: 2003-01-28 22:22:00 Authoring application: Microsoft Word 9.0
MD5: 815b12d750900b494e9f7a5ca3cd4299 SHA-1: 3d113da3ddbe768bbd014626903ac725cfcdf2fb SHA-256: 57f44410a0589036724929f9fa88bd9a3a114f93cfbeaf6b8cd44fe411de99e3
300 Risk Score

Malware Insights

Doc.Trojan.Melissa-7 · confidence 95%

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

The file is identified as Doc.Trojan.Melissa-7 by ClamAV, indicating a known malicious macro. The presence of a Document_Open macro and CreateObject calls strongly suggests the execution of malicious VBA code. This macro is likely designed to download and execute a second-stage payload, as indicated by the 'OLE_VBA_PCODE_AUTOEXEC_EXEC' heuristic firing.

Heuristics 7

  • ClamAV: Doc.Trojan.Melissa-7 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.Melissa-7
  • 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
fe47e96a2000d8799af5e0c61b6e89381be03192e8bd3a8bda89bfef6c12caec		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 3882 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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