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

Static analysis result for SHA-256 f1d61f4415e35f4f…

MALICIOUS

Office (OLE) / .DOCX

144.6 KB Created: 2021-01-05 07:06:00 Authoring application: Microsoft Office Word
MD5: fc59bf0dc1610f692a98c99baec41a01 SHA-1: b58c2ea4490c574bfbf0eb31f4949cc95c43c46a SHA-256: f1d61f4415e35f4fbff441b2dfb744721b4cbcfe2ae78a1f52bba612457d22be
180 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1027 Obfuscated Files or Information

The file contains a VBA macro that is automatically executed upon opening, indicated by the 'Document_Open' macro and 'CreateObject' call heuristics. The macro is obfuscated and likely intended to download and execute a second-stage payload, as suggested by the 'Suspicious extracted artifact' firing. No specific family could be identified, but the execution of an auto-executing macro is a common delivery mechanism.

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
d3b097275af7032178b4c001ca8fbb5e7bf0f68c090585141a79334ce9cb0a60		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 10798 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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