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

Static analysis result for SHA-256 c4968bccac3560ee…

MALICIOUS

Office (OLE)

19.0 KB Created: 1998-07-03 00:26:00 Authoring application: Microsoft Word for Windows 95 First seen: 2012-06-14
MD5: c932e8402500104056884daede5e5c9b SHA-1: bbf4c8a34eebff7e958bf8a724c1c1097b34fd0c SHA-256: c4968bccac3560eee1b8e61b6bb20c48036cb53a23302bdbb8252d94eebe1af2
100 Risk Score

Malware Insights

Win.Trojan.Karatka-1 · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic

The sample exhibits legacy WordBasic macro-virus markers, specifically 'ToolsMacro', and is identified by ClamAV as Win.Trojan.Karatka-1. The document body contains numerous references to 'karatka' and related strings, reinforcing the ClamAV detection name. This indicates the file is a malicious macro-based document likely intended to execute arbitrary code.

Heuristics 2

  • ClamAV: Win.Trojan.Karatka-1 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Win.Trojan.Karatka-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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