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

Static analysis result for SHA-256 5ce28b7553593704…

MALICIOUS

Office (OLE) / .DOC

171.5 KB Created: 2021-01-25 09:28:00 Authoring application: Microsoft Office Word
MD5: 992e1be2c96fd2b848f0fd718e5f3466 SHA-1: 5db842fb860afb42dbafa3748b2d78559de2a200 SHA-256: 5ce28b755359370404df6ae21cd464976db2622eccc162c4829911378d842b58
202 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment

The sample is a malicious Office document containing VBA macros, specifically a Document_Open macro that uses GetObject. The ClamAV heuristic identifies it as Doc.Malware.Valyria-10034158-0. The VBA script is heavily obfuscated but appears to be designed to execute a secondary stage, indicated by the auto-execution of the Document_open subroutine and the use of GetObject.

Heuristics 6

  • ClamAV: Doc.Malware.Valyria-10034158-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.Valyria-10034158-0
  • 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
f3c1208957a8588b8a5352b63af9a94a87401fa2b1f98d6dafce63f68312781e		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 8529 bytes

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