Office (OLE) / .DOC malware analysis — malicious · fa9b133af96141d2

MALICIOUS

Office (OLE) / .DOC

262.5 KB Created: 2008-07-08 01:52:00 Authoring application: Microsoft Office Word

MD5: 96cd00d2258ce0a9d24026461571b4b7 SHA-1: b1dd93f827f3f8e71f822b0925c790366cbf542c SHA-256: fa9b133af96141d261ae4cf256186f193418b8a2a2b09e48f87c06a95bfa3eef

188 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1059.001 PowerShell

The file is identified as malicious by ClamAV with the signature 'Doc.Trojan.WhiteIce-1'. Static analysis revealed a VBA project with no executable statements, but a critical heuristic 'OLE_VBA_PCODE_AUTOEXEC_EXEC' indicates auto-execution of VBA p-code with execution tokens, specifically 'document_open' and 'Shell'. This suggests the VBA code, despite appearing empty, likely contains obfuscated logic to execute commands. The heap spray pattern further indicates potential exploitation or memory manipulation techniques.

Heuristics 5

ClamAV: Doc.Trojan.WhiteIce-1 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Trojan.WhiteIce-1
Heap-spray pattern detected high SC_HEAP_SPRAY

Repeated 0x41 (A) bytes found
VBA p-code auto-exec with execution tokens high OLE_VBA_PCODE_AUTOEXEC_EXEC

Compiled VBA/cache stream contains an auto-execution token together with shell/download/object-execution tokens. This catches p-code-only or source-extraction-failure macro documents where visible source is unavailable.
Suspicious extracted artifact high EXTRACTED_FILE_STATIC_TRIAGE

One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
VBA project contains no executable statements low OLE_VBA_MACROS

Document contains a VBA project, but extracted modules only contain attributes/options/comments and no executable statements.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `432a1f003dbfd892596be05fa03950d4afd0c8a88a8916484be15662a7d77238`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	69193 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 99 long base64-like blob(s). Carved macro source contains an auto-exec entry point and execution/download terms.

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