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

Static analysis result for SHA-256 4bb4e4e1b44c388a…

MALICIOUS

Office (OLE) / .XLS

88.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: 1af54d57411fbcc869e5e1529fb44ea7 SHA-1: dbc1869ef77fd68867db0b8fce0fbff53b19354e SHA-256: 4bb4e4e1b44c388a8244e7d13a7d68797c5b6cc1cc9d93e2bc16a6b47b929c91
80 Risk Score

Malware Insights

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

The file contains Excel 4.0 macros, specifically an Auto_Open function that utilizes dangerous formula APIs like RUN. The document body and extracted URLs suggest a lure to download and execute a second-stage payload. The macro is likely responsible for fetching and running the content from the provided URLs.

Heuristics 4

  • XLM Auto_Open with dangerous formula APIs high OLE_XLM_DANGEROUS_FN
    Excel 4.0 macro sheet contains an Auto_Open / Auto_Close entry and dangerous XLM formula APIs that can invoke programs, write files, or transfer control without VBA.
  • 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://casadodestino.com/ds/1802.Dc
    • https://casadodestino.com/ds/1802.gif

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
xlm_macros.txt
10cce2ab17678fe0b5e0170fb2b30d1eb62b7815ec98c2e7862752c60079d04e		 xlm-macro oletools.olevba.extract_all_macros (XLM macro listing) 3265 bytes

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