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

Static analysis result for SHA-256 b7973e59b9a1fefd…

MALICIOUS

Office (OLE) / .XLS

51.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: 23698f860130f13983c51c6b0adc0ba6 SHA-1: fcc002dd8eb98c32759f427817747ff2b9837524 SHA-256: b7973e59b9a1fefd3b89a76c84ee3edf69ac71f4a1293adf1dac8f6aafcd57cb
80 Risk Score

Malware Insights

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

The file is an Excel 4.0 (XLM) macro-enabled spreadsheet. It contains an Auto_Open macro that uses dangerous formula APIs, specifically the RUN function, indicating an attempt to execute external code. The document also contains a lure to encourage users to enable macros or editing. The embedded URLs suggest a download location for a second-stage payload. No scripts were extracted from this sample.

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://blinko.fun/ptqhxluivdbb/D�
    • http://blinko.fun/ptqhxluivdbb/3415201.png

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
xlm_macros.txt
407b5d40067caff84fd7803b751c089af3c1c224ac1c33794264fa7fe8b1ae17
xlm-macro oletools.olevba.extract_all_macros (XLM macro listing) 3673 bytes