Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 cd41dcede252ae1d…

MALICIOUS

Office (OLE)

169.0 KB
MD5: b508adf0603ab78b554ada26b0d1c254 SHA-1: 39274eaa6c2ce9540ef3b7b723edac71a58aea62 SHA-256: cd41dcede252ae1de0d10e8b40a677a57637cc41d9e896b3c1182caea9970af8
180 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1105 Ingress Tool Transfer T1055 Process Injection

The sample is an OLE document with a large slack space anomaly, indicating potential obfuscation or embedded malicious content. Heuristics indicate the use of CreateProcess, VirtualAlloc, LoadLibrary, and GetProcAddress APIs, suggesting the execution of code and loading of dynamic libraries. The embedded URL 'http://%s:%d/index.php' is unknown and likely serves as a command and control or download server for a second-stage payload. No VBA or script content was directly available for analysis, limiting the ability to determine the exact execution flow.

Heuristics 6

  • 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 173,056 bytes but its declared streams total only 56,346 bytes — 116,710 bytes (67%) 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
  • 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://%s:%d/index.php
    • http://www.microsoft.com
    • https://www.verisign.com/rpa
    • http://ocsp.verisign.com/ocsp/status0
    • https://www.verisign.com/rpa0
    • http://crl.microsoft.com/pki/crl/products/CodeSignPCA.crl0

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