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

Static analysis result for SHA-256 d4be5ac15795801e…

MALICIOUS

Office (OLE) / .DOC

761.5 KB Created: 2020-10-21 17:11:00 Authoring application: Microsoft Office Word
MD5: 9a5d2c504a660e06c57383c217eedc2f SHA-1: 675d1491016e3b4f9737ceffb8f333373171085a SHA-256: d4be5ac15795801eaf9af1a68b24069051ef2f36d21b7178f60a273f75eb0853
280 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1027 Obfuscated Files or Information

The sample is a malicious OLE document containing VBA macros, specifically a Document_Open macro that executes code. Heuristics indicate a heap spray and a reference to Windows Script Host, suggesting the macro is used to download and execute a second-stage payload. The ClamAV detection name 'Doc.Dropper.Sdrop-9782466-0' further supports this dropper functionality. The document body appears to be corrupted or heavily obfuscated, but the presence of a password-protected archive lure heuristic indicates a common tactic to bypass gateway scanning.

Heuristics 8

  • ClamAV: Doc.Dropper.Sdrop-9782466-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Dropper.Sdrop-9782466-0
  • Heap-spray pattern detected high SC_HEAP_SPRAY
    Repeated 0x41 (A) bytes found
  • Reference to Windows Script Host high SC_STR_WSCRIPT
    Reference to Windows Script Host
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • VBA macros detected medium OLE_VBA_MACROS
    Document contains VBA macro code
  • 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://schemas.openxmlformats.org/drawingml/2006/main

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
a5d7ac9827401de1af06b89a6db714ac7d1041fe92f0e33012cfbcd4559e12e8		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 14029 bytes

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