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

Static analysis result for SHA-256 cd8ad573fb6bee6e…

MALICIOUS

Office (OLE) / .XLS

50.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: 8806c925f3fa2d03249dea96f332acaf SHA-1: b4d0929c8d0d60a3b72b5df46e37aab8a6809224 SHA-256: cd8ad573fb6bee6e44a08c5b9bc6cbb3669153fc613043a12b6bbaaa7bb311e7
80 Risk Score

Malware Insights

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

The file is an Excel 4.0 spreadsheet containing an Auto_Open macro, which is a known technique for executing malicious code. The macro uses dangerous functions like RUN and FileToFileA to download a file from the URL https://exploshot.com/24.gif and save it to C:\ProgramData\Triolexplorer\24.gif, likely to execute a second-stage payload. The presence of a macro-enable lure further supports the malicious intent.

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://exploshot.com/24.gif�
    • https://exploshot.com/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