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

Static analysis result for SHA-256 1681355c7231be5b…

MALICIOUS

Office (OLE) / .DOCX

151.0 KB Created: 2020-09-24 10:05:00 Authoring application: Microsoft Office Word
MD5: a74f8f0f8751de9a5fd15605fbf8c791 SHA-1: ad3851bc54c35130369142714b941dd2ae57ce08 SHA-256: 1681355c7231be5b8c4de6f34ca51d36069fce69fc52a391eadd66898a10cf9b
202 Risk Score

Malware Insights

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

The sample contains VBA macros, including a Document_Open auto-execution macro, which is a common technique for initial execution. The macro uses CreateObject to likely launch a secondary payload, potentially PowerShell, as indicated by the obfuscated strings in the document body that resemble PowerShell commands. The ClamAV detection 'Doc.Trojan.Agent-9765752-0' further confirms its malicious nature.

Heuristics 6

  • ClamAV: Doc.Trojan.Agent-9765752-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.Agent-9765752-0
  • 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
b39e572cf96864edb4f5c39daa3a8388f74111156690860ca53002be67bbf3ff		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 20583 bytes

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