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

Static analysis result for SHA-256 7733cf028809d7fb…

MALICIOUS

Office (OLE) / .DOC

323.5 KB Created: 2001-12-14 14:26:00 Authoring application: Microsoft Word 9.0
MD5: 0bdad99e65974a0b65f3151a18e8d0c8 SHA-1: c68c1242112013ecc82beddbbdc158c5396b3176 SHA-256: 7733cf028809d7fb63d1e6a8cedf5571f2f3422a21561d96618d7598c904612d
362 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.003 Windows Command Shell

The sample exploits CVE-2006-6456, a known vulnerability in Microsoft Word's table parsing, to achieve code execution. Heuristics indicate the use of WinExec, CreateProcess, VirtualAlloc, LoadLibrary, and GetProcAddress, suggesting the loading and execution of a secondary payload. Suspicious cmd.exe invocation with an execution flag further supports this. The embedded URLs are likely related to the payload delivery or command and control infrastructure.

Heuristics 10

  • CVE-2006-6456 — Microsoft Word malformed table SPRM critical CVE exact CVE_2006_6456
    WordDocument contains a malformed table border-color SPRM in the CVE-2006-6456 shape: a valid table-SPRM cluster is followed by an invalid high-byte 0xFF SPRM where Word expects a normal sprmTBrc*Cv record. Vulnerable Word 2000/2002/2003 parsers corrupt memory while handling this malformed data structure.
  • Reference to WinExec API high SC_STR_WINEXEC
    Reference to WinExec API
  • Reference to CreateProcess API high SC_STR_CREATEPROCESS
    Reference to CreateProcess API
  • Suspicious cmd.exe invocation with execution flag high SC_STR_CMD
    Suspicious cmd.exe invocation with execution flag
  • 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 331,264 bytes but its declared streams total only 94,801 bytes — 236,463 bytes (71%) 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).
  • OLE file has appended executable-looking payload bytes high OLE_APPENDED_PAYLOAD
    OLE compound file contains a large high-entropy region beyond the declared major streams and that region includes shellcode, PE, or loader API markers. This is a payload-carrier signal, not a specific CVE attribution by itself.
  • Reference to VirtualAlloc API medium SC_STR_VIRTUALALLOC
    Reference to VirtualAlloc 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://ihearttibet.org/?page_id=20
    • http://www.tibetnetwork.org/resources-10march2010

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