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

Static analysis result for SHA-256 774059c5c371964d…

MALICIOUS

Office (OLE) / .DOCX

259.4 KB Created: 2020-10-29 09:30:00 Authoring application: Microsoft Office Word
MD5: ed2db564083a049a79a442ddcdabfe89 SHA-1: 10c59bd88ce81544684a31d25e32439a81127bda SHA-256: 774059c5c371964d14cb4894f7a1699d2bb5b3ce2bcb1544bd9a6ef92e845547
202 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1204.002 Malicious File

The file contains VBA macros, including a Document_Open auto-execution macro, which is a common technique for initiating malicious actions. The script attempts to obfuscate its actions by using string concatenation and random number generation, but the presence of CreateObject and the overall structure strongly suggest it is designed to download and execute a second-stage payload. The ClamAV detection further supports its malicious nature.

Heuristics 6

  • ClamAV: Doc.Downloader.Generic-9785156-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Generic-9785156-0
  • 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.
  • 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
2c8aded1cc33908777d3554a19067d8f93ed6d8269cc13dcdcff33eca45ebd5f		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 18919 bytes

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