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

Static analysis result for SHA-256 645f2f0ffccea1e4…

MALICIOUS

Office (OLE) / .DOCX

155.7 KB Created: 2020-12-28 15:43:00 Authoring application: Microsoft Office Word
MD5: c555fdc49dcf33b97588648b885bebad SHA-1: beb0ce3715039286daf2c91c39bd608ed45c4c6d SHA-256: 645f2f0ffccea1e41116b8363d465f5045b38130a2816e58b993b29ff4ad0abd
242 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1140 Deobfuscate/Decode Files or Information

The sample contains VBA macros, specifically a Document_Open macro that utilizes CreateObject to execute obfuscated code. This behavior, combined with the ClamAV detection of 'Doc.Downloader.EmotetRed02224-9938637-0', strongly suggests the document is designed to download and execute a secondary payload. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates a common tactic of instructing the user to open a password-protected archive, likely containing the actual malware.

Heuristics 7

  • ClamAV: Doc.Downloader.EmotetRed02224-9938637-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.EmotetRed02224-9938637-0
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject 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.
  • 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
a004a96685dc375590aeec65acf06fce9e74ef2bbe0aa7a48bc315f9645e3700		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 6009 bytes

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