Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 31eed9ea0b73f082…

MALICIOUS

Office (OLE)

153.2 KB Created: 2020-09-14 22:09:00 Authoring application: Microsoft Office Word
MD5: 6baff5dcd4f35d1d3d4ec647b46cf9f2 SHA-1: cd0b457dc473ecb06e12856b57bc5e76ecf2abfd SHA-256: 31eed9ea0b73f0824c7e449cf3246f8e914614057c5619e5c4efbdfb1e99b40d
240 Risk Score

Malware Insights

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

The file contains a malicious VBA macro, specifically triggered by the Document_Open auto-exec function. This macro utilizes CreateObject to execute code, as indicated by the p-code analysis. The presence of the 'macros.bas' artifact and ClamAV detection 'Doc.Malware.Generic-9760527-0' further confirms its malicious nature. The macro appears to be designed to download and execute a second-stage payload.

Heuristics 7

  • ClamAV: Doc.Malware.Generic-9760527-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.Generic-9760527-0
  • 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
bf2dc6e4793502154f28a14458af4f5198ccc48932a5641a4c34f7f1fcdc0c82		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 18582 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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