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

Static analysis result for SHA-256 fad898ec89cc81ba…

MALICIOUS

Office (OLE) / .DOCX

84.8 KB Created: 2020-12-30 06:48:00 Authoring application: Microsoft Office Word
MD5: fd03195f30e3dc65f4bf63c04db48d84 SHA-1: 05f4546d317382343dd052eea79d6f6f785fe927 SHA-256: fad898ec89cc81bacf8a7edea7f43a0a4304e4bb40221c447893f21f969e8ed6
180 Risk Score

Malware Insights

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

The sample contains a VBA macro that is automatically executed upon opening the document, indicated by the 'Document_Open' and 'CreateObject' heuristic firings. This macro likely downloads and executes a second-stage payload, as suggested by the 'macros.bas' artifact. The obfuscated document body text does not provide further context on the lure.

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
f392ec7de4bc91e9168573ed3554ded1ffa8839807d0d22211a4c7f8e84a6f24		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 6590 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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