Win.Trojan.Dark-3 — Office (OLE) malware analysis

Static analysis result for SHA-256 334a478918491af6…

MALICIOUS

Office (OLE)

372.0 KB Created: 1996-01-16 00:45:00 Authoring application: Microsoft Word for Windows 95 First seen: 2012-06-14
MD5: 80ced1200b168cb683ae00bcaa9859de SHA-1: c250c0c81e51effe13e17bdab66ac1020944979a SHA-256: 334a478918491af622214d2e659bc63e8f475ec52867ec94ebe29ad4d44fd994
160 Risk Score

Malware Insights

Win.Trojan.Dark-3 · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic

The file contains legacy WordBasic macro virus markers and is identified by ClamAV as Win.Trojan.Dark-3. The document body explicitly describes the virus's self-propagation mechanism, infecting the NORMAL.DOT template and other documents. It also details macros designed to disable macro management features, indicating an intent to hinder removal and analysis.

Heuristics 4

  • ClamAV: Win.Trojan.Dark-3 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Win.Trojan.Dark-3
  • Heap-spray pattern detected high SC_HEAP_SPRAY
    Repeated 0x06 bytes found
    Disassembly hidden — these bytes score as degenerate, not coherent x86 code (single mnemonic 'push' is 96% of instructions — a sled or padding/filler run, not program logic).
  • 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.
  • Suspicious extracted artifact medium 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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
ole10native_00.bin ole-package OLE Ole10Native stream: ObjectPool/_883239594/Ole10Native 179300 bytes
SHA-256: c4c0afba504f6bc79b660ddf1fd22c30705317c4cbc259239033ff0e97aa99d0
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Static shellcode analysis found candidate code region(s). Indicators: heap spray 0x06

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