Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 1c3408506a1fa10d…

MALICIOUS

Office (OLE)

40.5 KB Created: 2010-01-07 19:30:00 Authoring application: Microsoft Word 11.5.0
MD5: 85f8dd2779db275bfe670105787920d4 SHA-1: 7c34362f51490d9e4a560f1d0d83c37a528550f9 SHA-256: 1c3408506a1fa10d18a9ea057161b69c47464e916245e6ca37726fdca21737eb
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File T1059.005 Visual Basic

The sample is identified as malicious by ClamAV with the signature Doc.Trojan.Thus-8. Static analysis detected an Equation Editor OLE object and VBA macros, including a Document_Open macro. These findings strongly suggest an exploit targeting the Equation Editor vulnerability, likely delivered as a malicious attachment. The VBA macros are likely responsible for executing the exploit.

Heuristics 6

  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Contains Equation Editor object — related to CVE-2017-11882 / CVE-2018-0802 exploitation, but CLSID presence alone is not the malformed MTEF exploit primitive.
  • ClamAV: Doc.Trojan.Thus-8 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.Thus-8
  • ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV
    ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • 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://www.math.ucdavis.edu/~kouba/CalcOneDIRECTORY/maxmindirectory/MaxMin.html
    • http://www.math.ucdavis.edu/~kouba/CalcOneDIRECTORY/maxmindirectory/MaxMin.htmlCalculus

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
ca4b87bd8c2215ef732bea004db9ae4556baaf83aaeaf6301676a95777a7ee94		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 2403 bytes
Detection
ClamAV: Doc.Trojan.Thus-8
Obfuscation or payload: unlikely

Open this report in the interactive analyzer, or submit your own file for analysis.