MALICIOUS
340
Risk Score
Malware Insights
MITRE ATT&CK
T1059.001 PowerShell
T1204.002 Malicious File
T1055.012 Process Hollowing
T1055.001 Process Injection
The sample contains numerous high and critical heuristic firings related to process injection techniques, including CreateProcess, VirtualAlloc, WriteProcessMemory, CreateRemoteThread, LoadLibrary, and GetProcAddress. This strongly suggests the document is designed to inject malicious code into a legitimate process. The embedded URL is likely used to download a second-stage payload. The OLE slack anomaly and NOP sled further indicate a packed or obfuscated payload.
Heuristics 9
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Reference to WriteProcessMemory API critical SC_STR_WRITEPROCESSMEMORYReference to WriteProcessMemory API
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Reference to CreateRemoteThread API critical SC_STR_CREATEREMOTETHREADReference to CreateRemoteThread API
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NOP sled detected high SC_NOP_SLEDFound 20+ consecutive 0x90 bytes
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Reference to CreateProcess API high SC_STR_CREATEPROCESSReference to CreateProcess API
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Reference to LoadLibrary API high SC_STR_LOADLIBRARYReference to LoadLibrary API
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Reference to GetProcAddress API high SC_STR_GETPROCADDRESSReference to GetProcAddress API
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OLE document has large unaccounted-for region high OLE_SLACK_ANOMALYOLE file is 234,888 bytes but its declared streams total only 31,351 bytes — 203,537 bytes (87%) 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).
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Reference to VirtualAlloc API medium SC_STR_VIRTUALALLOCReference to VirtualAlloc API
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Embedded URL info EMBEDDED_URLOne 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.winimage.com/zLibDll
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