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

Static analysis result for SHA-256 e324d844a2bea9e4…

MALICIOUS

Office (OLE) / .XLS

164.6 KB
MD5: a7e55b42ecfd3ca5276fd82338d61b0e SHA-1: 3d3ca5fa152e59a9f607810af17798beb4d099a7 SHA-256: e324d844a2bea9e4ac7a5151b0bd3fcdc81b81957f027666b2506b4429fd95e3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File

The sample is an OLE document with a significant slack space anomaly, suggesting hidden or embedded malicious content. High-severity heuristics indicate the use of Windows API functions commonly employed for memory allocation and code execution (VirtualAlloc, VirtualProtect, LoadLibrary, GetProcAddress). While no specific malicious URLs or scripts were extracted, these API calls strongly suggest the file is designed to download and execute a secondary payload. The document body appears to be corrupted or heavily obfuscated, preventing a more precise analysis of its lure.

Heuristics 6

  • 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 168,560 bytes but its declared streams total only 56,346 bytes — 112,214 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
  • 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.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

Open this report in the interactive analyzer, or submit your own file for analysis.