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

Static analysis result for SHA-256 f983be9d613d6367…

MALICIOUS

Office (OLE) / .XLS

85.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: 652259f1f6393d71240d6643573c09f4 SHA-1: b18ff26e82916eba8a7a69e5f5ccf6ba0f87ccf9 SHA-256: f983be9d613d636731beba91e404fda55467350aa963ca3896fc1995f12c708d
80 Risk Score

Malware Insights

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

The sample is an Excel 4.0 (XLM) macro-enabled spreadsheet. It contains an Auto_Open macro that uses dangerous functions, including RUN, indicating it likely executes arbitrary code. The document body suggests a DocuSign lure to trick users into enabling macros. The embedded URL is likely used to download 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://rlvq27rmjej02sfvb.com/fedara.Z

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
xlm_macros.txt
4d122bd5a74bb0f54ca9644c00591689067947ab2c1980f137d2ed6d091fb16f
xlm-macro oletools.olevba.extract_all_macros (XLM macro listing) 2099 bytes