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

Static analysis result for SHA-256 b8a9d5f54e75467b…

MALICIOUS

Office (OLE) / .DOCX

152.9 KB Created: 2020-09-24 05:47:00 Authoring application: Microsoft Office Word
MD5: 52b08a6f1ed1dcaa8cd64cfd4deedfaa SHA-1: 4c358d71ca86cc2e579674905b44b32918848710 SHA-256: b8a9d5f54e75467b003cb37db317d9537fc49705aa3334531937929937b0eaae
240 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1059.005 Visual Basic

The sample contains a large VBA macro that is auto-executed via the Document_Open event. This macro utilizes CreateObject to execute obfuscated PowerShell commands. The obfuscated PowerShell commands are likely intended to download and execute a second-stage payload. The DOC BODY appears to be a heavily obfuscated string that may represent part of the PowerShell command.

Heuristics 7

  • 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.
  • Suspicious extracted artifact high EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
  • 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
b0798fb7450882311ba60b57e039433588cb794c6cc8a10f75d1de73c5c7973a		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 19490 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved macro source contains an auto-exec entry point and execution/download terms.

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