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

Static analysis result for SHA-256 81c53ed228ffde29…

MALICIOUS

Office (OLE) / .DOCX

157.5 KB Created: 2020-12-30 07:47:00 Authoring application: Microsoft Office Word
MD5: 7f41ff3a29d6f02110734362902fcd17 SHA-1: 15f5a183531d4fc532bb46bcbda3b384a0a8f227 SHA-256: 81c53ed228ffde29d71ceab29c0cad80bee160c21b5160091f0d85ef6fe9fa76
202 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1105 Ingress Tool Transfer

The sample contains a VBA macro that automatically executes upon opening the document. This macro utilizes CreateObject to interact with the file system, attempting to create and write to specific file paths. This behavior strongly suggests the macro's purpose is to download and execute a second-stage payload, a common technique for malware delivery. The ClamAV detection also points to a downloader variant.

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
9bf607663b8a2bf6d5409ee86f6e92f88c816fbcbd12854fba6197389a76ce81		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 6567 bytes

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