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

Static analysis result for SHA-256 34193a09b87ec1dd…

MALICIOUS

Office (OLE) / .DOCX

161.9 KB Created: 2020-12-30 10:10:00 Authoring application: Microsoft Office Word
MD5: f45dc51d3bb62ba85562ca0f7fa4a3f3 SHA-1: 695c495f4334e6d6b3409b04743cadedcc3574c9 SHA-256: 34193a09b87ec1ddb0eeb0bef1296cef50961ff44f74655870b6894b7ec22871
202 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1204.002 Malicious File T1127.001 Trusted Developer Utilities: Code Signing Certificates

The sample contains a VBA macro that executes upon opening the document, as indicated by the Document_Open heuristic. This macro utilizes CreateObject to instantiate a Scripting.FileSystemObject, which is then used to create and write to files with suspicious paths like 'K:\gtkeHBHHK\oBDpLs.edMUAlIJF'. This behavior suggests the macro is designed to download and execute a second-stage payload. The ClamAV detection also points to a downloader family.

Heuristics 6

  • 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.
  • 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
663869ec393d0a50f151da4884835577fc196722b5e56686c64f3948abebb4bb		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 6571 bytes

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