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

Static analysis result for SHA-256 81f08599b7fccb01…

MALICIOUS

Office (OLE) / .XLS

523.5 KB Created: 2015-06-05 18:17:20 Authoring application: Microsoft Excel First seen: 2021-05-23
MD5: 5edbe2bc368176618975e0dd981ae209 SHA-1: 05eb0626c3013a0de95221fee7c780ceeeb2e245 SHA-256: 81f08599b7fccb01100f002b3c161cf33dbd0dbb2ba0dae9c8c98bf555252982
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 attempts to download and execute a payload from one of the provided URLs. It also attempts to establish persistence by writing to the registry Run key.

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://psq.com.mx/hDHqOp58UBQv/filter.html In document text (OLE body)
    • https://academy.haleemcampus.com/GxaCS5azoZlJ/filter.htmlIn document text (OLE body)

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