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

Static analysis result for SHA-256 f9195ae045a066a3…

MALICIOUS

Office (OLE) / .XLS

181.5 KB Created: 2021-02-23 19:30:17 Authoring application: Microsoft Excel
MD5: 7e9409ac72b5361df78c3c06bf0d56d2 SHA-1: e65f0b3df3670997589185980c26fdac15d40e49 SHA-256: f9195ae045a066a3a00cf701d165a0cabbe402e9921c150c403f7fa98bd50e6b
60 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic

The sample is an encrypted Excel 4.0 macro sheet, indicated by the OLE_XLM_ENCRYPTED_MACROSHEET heuristic. The presence of an OLE_XLM_AUTOOPEN heuristic further confirms the use of XLM macros. The document body is heavily obfuscated and unreadable, preventing further analysis of its specific intent. However, the combination of encrypted macros and the auto-execution heuristic strongly suggests a malicious payload delivery mechanism.

Heuristics 2

  • Encrypted Excel 4.0 macro sheet high OLE_XLM_ENCRYPTED_MACROSHEET
    Workbook contains an Excel 4.0 macro sheet and BIFF FILEPASS encryption. Password-protected XLM macro sheets, especially the default Excel password path, are a common malware evasion pattern because static formula extraction may fail until the workbook is decrypted.
  • 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.

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