Malicious Office (OLE) / .DOC — malware analysis report

Static analysis result for SHA-256 36666797c56f8fba…

MALICIOUS

Office (OLE) / .DOC

75.5 KB Created: 2002-06-27 04:35:00 Authoring application: Microsoft Word 9.0
MD5: 762645157dbc893c564928edfed2413b SHA-1: 66a67434fd6e3771666e4adaa28fd9b481f2b4bc SHA-256: 36666797c56f8fba9a1839607990fb8a556a77bebd6fe8006640997d6c7cf522
460 Risk Score

Heuristics 10

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • WScript.Shell usage critical OLE_VBA_WSCRIPT
    WScript.Shell usage
  • ClamAV: Win.Trojan.Kallisti-1 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Win.Trojan.Kallisti-1
  • 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.
  • Reference to Windows Script Host high SC_STR_WSCRIPT
    Reference to Windows Script Host
  • 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
bb6769eb300b6f077f14c63a72d9fa208f8a8d69dc1a93ba74e04f7287cd2eca		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 70705 bytes
Detection
ClamAV: Win.Trojan.C-286
Obfuscation or payload: likely
Carved artifact contains 2 shell/COM execution token(s). Carved macro source contains an auto-exec entry point and execution/download terms.

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