Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 22c8c25451ead774…

MALICIOUS

Office (OLE)

523.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2021-07-10
MD5: 5dc0dbb9a817db4a5f589f670c6b9241 SHA-1: 6e51ed7744080f5583beb20fd7052e2fcbf7cd3a SHA-256: 22c8c25451ead7742914a869f775af6e8751907a83b46077b8439d03a9105c81
102 Risk Score

Malware Insights

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

The sample is an Excel 4.0 macro sheet (XLM) that uses an 'enable content' lure to trick the user into running macros. The macro sheet contains embedded URLs that are likely used to download and execute a second-stage payload. The presence of XLM macros and the lure technique are indicative of a downloader malware.

Heuristics 4

  • XLM Auto_Open workbook with payload URL or enable-content lure critical OLE_XLM_AUTOOPEN_PAYLOAD_LURE
    Workbook contains an Excel 4.0 macro sheet with Auto_Open / Auto_Close and also exposes a payload URL or enable-content lure in the OLE bytes. This combination is a high-confidence XLM downloader/social-engineering pattern even when formula recovery cannot decode the full macro chain.
  • 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
  • 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 https://hallakjewelry.com/wRVyQrkX/utka.html In document text (OLE body)
    • https://founderscirclecapital.eu/BMqXKrcdkQ4/utka.htmlIn document text (OLE body)

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