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

Static analysis result for SHA-256 f6e5b19cf852ea69…

MALICIOUS

Office (OLE) / .DOC

116.5 KB Created: 2021-01-08 08:51:00 Authoring application: Microsoft Office Word
MD5: 1cf149340f4b67414890419f99d97493 SHA-1: cdc87def9c35ea59ed05a493f4d04d8d5ed031f8 SHA-256: f6e5b19cf852ea69b7a3f6654863156a47298e26e4884fd3271da9ef29161cdc
240 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1218.005 System Binary Proxy Execution: Mshta

The sample contains VBA macros, including a Document_Open auto-execution macro, which is a common delivery mechanism for malware. The heuristics indicate the use of certutil for downloading and decoding, and a GetObject call, suggesting the execution of a secondary payload. The presence of a LOLBin reference further supports this. The embedded URL, though benign, is noted.

Heuristics 7

  • LOLBin reference in VBA critical OLE_VBA_LOLBIN
    LOLBin reference in VBA
  • Reference to certutil (download/decode) high SC_STR_CERTUTIL
    Reference to certutil (download/decode)
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • GetObject call high OLE_VBA_GETOBJ
    GetObject call
  • 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.
  • 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
bdefd95d75ff96c4bd2045f9344d36f4cdbd69a0642487a452ed77d0874ce6e7		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 6720 bytes

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