Office (OLE) / .XLS malware analysis — malicious · 9413731723650df4

MALICIOUS

Office (OLE) / .XLS

525.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2021-05-26

MD5: 84c02e3539dd62653eb82ab41adb8c40 SHA-1: 15e20b2b636aef5c388ff9b100cbcc37e497b876 SHA-256: 9413731723650df4c9172b90c7bafa3b90aad5fc895eb3aaa4a1049b941470c5

142 Risk Score

Malware Insights

MITRE ATT&CK

T1204 User Execution: Malicious Link T1204.002 User Execution: Malicious File

The file is an Excel 4.0 (XLM) macro sheet, which is a legacy format often used for malicious purposes. The presence of an 'enable lure' heuristic indicates the document likely prompts the user to enable macros. Two unknown reputation URLs were extracted, suggesting a potential download or redirection mechanism. No scripts were extracted from this sample.

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://rathnakumar.com/BuTxTGO63eD/solo.html In document text (OLE body)
- https://maidzonemobile.com/Voy4zCN8y1/solo.htmlIn document text (OLE body)

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