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

Static analysis result for SHA-256 cfdbc451d70ad4cc…

MALICIOUS

Office (OLE) / .XLS

525.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2026-05-23
MD5: acff4257c88aaa8ed46a14cd0c557cef SHA-1: 9badc5474d72e496591684e8aa2172787fdd1e0c SHA-256: cfdbc451d70ad4cc76b75535d662a2b75a1fe74c29a4971ffcafa137ba154917
142 Risk Score

Malware Insights

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

The presence of an OLE_XLM_AUTOOPEN heuristic indicates that Excel 4.0 macros are present and likely configured to execute automatically. The SE_ENABLE_LURE heuristic confirms that the document contains content designed to trick the user into enabling macros. The embedded URLs likely serve as download locations for further stages of the attack. The XLM macros are suspected to download and execute a second-stage payload.

Heuristics 5

  • 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 uses dangerous capability functions high OLE_XLM_DANGEROUS_FN_STATIC
    Workbook contains an Excel 4.0 macro sheet whose formulas reference two or more dangerous capability functions (e.g. CALL into a Win32 API such as URLDownloadToFile, EXEC to launch a process, REGISTER an external DLL procedure, or FWRITE/FOPEN to drop a file) with an Auto_Open / Auto_Close auto-execution name. This is the canonical XLM downloader/dropper shape and is recovered directly from the BIFF records, so it fires even when the full macro chain cannot be deobfuscated.
  • 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://kashishbd.com/qLQ59E1q2/solo.html In document text (OLE body)
    • https://maatdeur.com/aTmGQK0DBT/solo.htmlIn document text (OLE body)

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