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

Static analysis result for SHA-256 ec4ea1d549b7402d…

MALICIOUS

Office (OLE) / .XLS

50.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: 78be13d43095b04ee92492d305dab5b1 SHA-1: 42b1ab8833eff1b35ac68ddcb010b62b3d4648de SHA-256: ec4ea1d549b7402deb97b29a5b3326d44993a9c5adee63ff4975819c6ccd6b9a
80 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic for Applications T1204.002 Malicious File T1071.001 Web Protocols

The sample is an Excel 4.0 (XLM) macro-enabled spreadsheet. It contains an Auto_Open macro that uses dangerous formula APIs, specifically the RUN function, to download and execute a file. The document body presents a fake DocuSign interface to trick the user into enabling macros. The macro attempts to download a file from http://foundation.shanto-mariamfoundation.org/24.gif and save it as C:\ProgramData\Triolexplorer.exe, likely to execute a second-stage payload.

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 http://foundation.shanto-mariamfoundation.org/24.gif�
    • http://foundation.shanto-mariamfoundation.org/24.gif

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
xlm_macros.txt
b85a04030ee15a5823afbe8a5c58782f7c760714b2f75fcf902d376138ea1320		 xlm-macro oletools.olevba.extract_all_macros (XLM macro listing) 2772 bytes

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