Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 3eb8d4428390aff1…

MALICIOUS

Office (OLE)

367.0 KB Created: 2020-07-10 10:41:45 Authoring application: Microsoft Excel
MD5: 68ccc298d38de0e6e0342d69314c1cae SHA-1: 55cf4de58c3a4963198233aa23bea062e7721219 SHA-256: 3eb8d4428390aff16ffb7d9c85f82b449c250363eb4df033c279543a4f86e1b9
60 Risk Score

Malware Insights

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

The sample is an Excel file containing an Excel 4.0 macro, indicated by the OLE_XLM_AUTOOPEN heuristic. It also employs a lure to trick the user into enabling macros by impersonating a document signing service. The macro sheet itself contains obfuscated text that appears to be part of a URL, but it is too fragmented to reconstruct reliably. The embedded URLs are confirmed benign.

Heuristics 4

  • Excel 4.0 (XLM) macro sheet present medium OLE_XLM_AUTOOPEN
    Workbook contains an Excel 4.0 macro sheet sub-stream — XLM is rarely seen in modern legitimate workbooks and was a major Office malware vector during 2020-2022.
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • Document signing service impersonation lure medium SE_DOCUSIGN_LURE
    Document impersonates DocuSign, Adobe Sign, or a similar signing service in a signing-request context
  • 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.w3.org/1999/02/22-rdf-syntax-ns#
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/sType/ResourceRef#
    • http://ns.adobe.com/xap/1.0/

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