Office (OLE) / .DOC malware analysis — malicious · 434b98e5f4db77b1

MALICIOUS

Office (OLE) / .DOC

110.0 KB

MD5: 280b79c4fbf098ddd52756eb7954289f SHA-1: cc5d3100af690783994d33a36082b0cb3e81df35 SHA-256: 434b98e5f4db77b1238c50ee97f76a23737bccf11f528f9e2fca3d43932c1059

460 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.003 Windows Command Shell T1055.012 Process Hollowing T1105 Ingress Tool Transfer

The sample exhibits characteristics of a malicious OLE document, including a large slack space anomaly and an embedded PE executable. High-severity heuristics indicate the use of Windows API functions such as WriteProcessMemory and CreateRemoteThread, strongly suggesting process injection capabilities. The presence of an embedded executable further supports the likelihood of code execution. While one URL was extracted, it was labeled as benign.

Heuristics 12

Reference to WriteProcessMemory API critical SC_STR_WRITEPROCESSMEMORY

Reference to WriteProcessMemory API
Reference to CreateRemoteThread API critical SC_STR_CREATEREMOTETHREAD

Reference to CreateRemoteThread API
NOP sled detected high SC_NOP_SLED

Found 20+ consecutive 0x90 bytes
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 ShellExecute API high SC_STR_SHELLEXEC

Reference to ShellExecute 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 112,640 bytes but its declared streams total only 31,351 bytes — 81,289 bytes (72%) 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 PE executable high OLE_EMBEDDED_EXE

MZ/PE header found inside document — possible embedded executable
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://spaces.brad.ac.uk:8080/display/ssispsru/Contact

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