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

Static analysis result for SHA-256 489f54798c12257c…

MALICIOUS

Office (OLE) / .XLS

50.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: 9c3c80b8aee5e2e360550ae54f572dd7 SHA-1: 5169321af7e65e5a9616ac03602b9cf5e69edd10 SHA-256: 489f54798c12257c22af3b8107322df50ecd7c0540397e3df557c270f40e3028
80 Risk Score

Malware Insights

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

The sample is an Excel 4.0 (XLM) macro-enabled spreadsheet. Heuristics indicate the presence of an Auto_Open macro that uses dangerous functions, specifically the RUN function, and a lure to enable macros. The document body contains text suggesting a fake DocuSign interface and references a URL that is likely used for downloading a second-stage payload. The macro is designed to download a file from the embedded URL and save it as an executable.

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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