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

Static analysis result for SHA-256 42a722c129c612e1…

MALICIOUS

Office (OLE) / .XLS

50.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: 8e67da5b67fb0ca9099fd1d0d354444d SHA-1: 76e109bbd45844d5e6ebfd74b611faf67865be30 SHA-256: 42a722c129c612e1f3dd44c162687b48094e2021c11f398f879b98dcb7433802
80 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1204.002 Malicious File T1059.001 PowerShell T1059.003 Windows Command Shell T1059.004 JScript/VBScript

The sample is an Excel 4.0 (XLM) macro sheet that uses the Auto_Open function to execute dangerous formula APIs. It contains a lure instructing the user to enable macros, disguised as a DocuSign notification. The embedded URL 'http://condochicks.com/ynwnx/222222.png' is used in conjunction with the `URLDownloadToFileA` function to download a file, which is then saved as 'C:\ProgramData\Triolexplorer.exe'. This indicates a downloader functionality.

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://condochicks.com/ynwnx/222222.png�
    • http://condochicks.com/ynwnx/222222.png

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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