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

Static analysis result for SHA-256 18b27d5e96bd3972…

MALICIOUS

Office (OLE) / .DOC

113.0 KB Created: 2006-01-25 08:30:00 Authoring application: Microsoft Office Word
MD5: 3ef90263bebcc2d7ce5ff3162d805a1d SHA-1: 6879288c7d2d34952f385e4d50a37f3629a3754a SHA-256: 18b27d5e96bd3972b973031f0ba73db0af3911c90a07df5562223fd7471055e4
422 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059 Command and Scripting Interpreter

The sample exhibits critical heuristic firings related to process injection (WriteProcessMemory, CreateRemoteThread) and code execution (WinExec, CreateProcess, LoadLibrary, GetProcAddress), strongly suggesting it attempts to download and execute a secondary payload. The presence of embedded URLs further supports this, indicating a likely dropper or exploit delivery mechanism. The ClamAV detection as 'Doc.Dropper.Agent-7119450-0' reinforces the assessment of its malicious function.

Heuristics 11

  • Reference to WriteProcessMemory API critical SC_STR_WRITEPROCESSMEMORY
    Reference to WriteProcessMemory API
  • Reference to CreateRemoteThread API critical SC_STR_CREATEREMOTETHREAD
    Reference to CreateRemoteThread API
  • ClamAV: Doc.Dropper.Agent-7119450-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Dropper.Agent-7119450-0
  • Reference to WinExec API high SC_STR_WINEXEC
    Reference to WinExec API
  • Reference to CreateProcess API high SC_STR_CREATEPROCESS
    Reference to CreateProcess API
  • Reference to LoadLibrary API high SC_STR_LOADLIBRARY
    Reference to LoadLibrary API
  • Reference to GetProcAddress API high SC_STR_GETPROCADDRESS
    Reference to GetProcAddress API
  • OLE document has large unaccounted-for region high OLE_SLACK_ANOMALY
    OLE file is 115,714 bytes but its declared streams total only 21,151 bytes — 94,563 bytes (82%) live in unallocated sector slack. This is the canonical hiding place for pre-macro-era Office exploit payloads (XOR-encoded shellcode reached via a parser pointer-corruption bug in the document structure).
  • Reference to VirtualAlloc API medium SC_STR_VIRTUALALLOC
    Reference to VirtualAlloc API
  • Reference to VirtualProtect API medium SC_STR_VIRTUALPROTECT
    Reference to VirtualProtect API
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://www.5iamas-microsoft-com:office:smarttagsV
    • http://www.5iantlavalamp.com/

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