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

Static analysis result for SHA-256 ad0972d2a239b3ba…

MALICIOUS

Office (OLE) / .DOC

31.5 KB Created: 2021-10-10 21:18:00 Authoring application: Microsoft Office Word
MD5: da6419e4d4e4528990898bcfdaa85e01 SHA-1: 8fdfe23dac4252203c5b7f9ff8b4778676188ca2 SHA-256: ad0972d2a239b3ba4cbe61079c530624e16e8e57159ce21796b3e711888c997d
182 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File T1059.005 Visual Basic

The Document_Open macro is triggered upon opening the document. It constructs and executes a PowerShell command. This command is designed to download a file from 'http://csdn.discoradapp.com/attachment/851045085270539197/8956746270239538953/Server.txt' and save it as 'C:\Users\Public\Documents\zexo.bat', which is then likely executed. The obfuscation in the script suggests an attempt to evade detection.

Heuristics 6

  • 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
81236fecee7ae66a24cc73aeb5bfb8ef621462316a42fd5a0db9e81f0f09a775		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 2526 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 2 long base64-like blob(s). Carved macro source contains an auto-exec entry point and execution/download terms.

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