Win.Trojan.Sunbeam-1 — Office (OLE) malware analysis

Static analysis result for SHA-256 917ef8f83b2ea331…

MALICIOUS

Office (OLE)

14.5 KB Created: 1997-03-16 18:02:00 Authoring application: Microsoft Word 6.0 First seen: 2015-10-04
MD5: dbd0f09b289aa784adeb3c32bf7d3f60 SHA-1: ff5c58831b54e7980feb2738ec23e62050d1fb75 SHA-256: 917ef8f83b2ea33151012f785f1cb52070098549eb50f17920ecb7b23f237098
80 Risk Score

Malware Insights

Win.Trojan.Sunbeam-1 · confidence 90%

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

The sample is identified as Win.Trojan.Sunbeam-1 by ClamAV. Legacy WordBasic macros are present, indicated by the OLE_LEGACY_WORDBASIC_AUTOEXEC heuristic. These macros attempt to execute a batch file named 'die.bat' and write content to it, suggesting a downloader or execution mechanism for a secondary payload.

Heuristics 2

  • ClamAV: Win.Trojan.Sunbeam-1 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Win.Trojan.Sunbeam-1
  • Legacy WordBasic auto-exec macro marker medium OLE_LEGACY_WORDBASIC_AUTOEXEC
    OLE Word document contains a legacy WordBasic auto-execution marker such as AutoOpen, but no modern VBA project was recovered and no stronger macro-virus family marker was present. This is analyst-facing evidence for old Word macro execution surface, not a downloader or parser-CVE attribution by itself.

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