Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 947360d96fa78134…

MALICIOUS

Office (OLE)

84.0 KB Created: 1996-12-17 01:32:42 Authoring application: Microsoft Excel
MD5: 294196ee527fc2729602dd23165a7e27 SHA-1: e2f6ccd80162c9fde22ffc0e297212570ed5eb68 SHA-256: 947360d96fa781341686f65893718830dd7531d44d0c5eee16557f37e313426a
140 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1027 Obfuscated Files or Information

The file is an Excel OLE document with a large slack space anomaly, indicating potential obfuscation or embedded malicious content. Heuristics indicate XOR-encoded strings and PEB access, suggesting attempts to evade detection. An embedded URL, http://www.cigoutlet.net, was extracted and is likely used to download a secondary payload. The document body contains text related to application forms, which serves as a lure to trick users into interacting with the malicious content.

Heuristics 4

  • XOR-encoded strings (key 0x97) critical SC_XOR_ENCODED
    Found 6 Windows library/API name(s) XOR-encoded with single-byte key 0x97: 'KERNEL32.DLL', 'LoadLibraryA', 'GetProcAddress', 'VirtualAlloc', 'VirtualProtect', 'RegOpenKeyExA'
  • PEB access via FS segment (x86) high SC_PEB_ACCESS
    PEB access via FS segment (x86)
  • OLE document has large unaccounted-for region high OLE_SLACK_ANOMALY
    OLE file is 86,016 bytes but its declared streams total only 21,308 bytes — 64,708 bytes (75%) 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).
  • 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.cigoutlet.net

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