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

Static analysis result for SHA-256 c52d2a4203765c17…

MALICIOUS

Office (OLE)

22.0 KB Created: 1997-07-16 06:58:00 Authoring application: Microsoft Word 6.0 First seen: 2012-06-14
MD5: b035aaaf7f5b69f5cb2585c93816cd92 SHA-1: 5fca023a465c2dc3ffd7ffbd35f84d199016e88f SHA-256: c52d2a4203765c172ec20573dc98ed828e73b3dc52eaf94119a8cc6453d4aa99
100 Risk Score

Malware Insights

Win.Trojan.Four-1 · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic

The sample was detected as Win.Trojan.Four-1 by ClamAV and exhibits legacy WordBasic macro virus markers. The embedded document body contains text indicating it is the '4in1 (Four in One)' virus from July 97, authored by 'Foxz [NoMercy]'. The macro code includes routines like 'ToolsMacro' and 'AutoClose' which likely aim to infect other documents or obfuscate the malware's presence.

Heuristics 2

  • ClamAV: Win.Trojan.Four-1 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Win.Trojan.Four-1
  • Legacy WordBasic macro-virus markers high OLE_LEGACY_WORDBASIC_MACRO_VIRUS
    OLE Word document contains legacy WordBasic auto-execution macro markers such as AutoOpen plus ToolsMacro/MacroFile/fileMacro/globMacro or named historical macro-virus strings. These old Word 6/95 macro forms are not exposed as a modern VBA project, so normal VBA source extraction can miss them.

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