Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 25c8462c3d18ac0a…

MALICIOUS

Office (OLE)

345.0 KB Created: 2020-07-21 07:21:33 Authoring application: Microsoft Excel First seen: 2020-09-07
MD5: c449b1fd5eda51bcc3a80add9713e458 SHA-1: 5ecdfb0b793f24b4e62ef2a38f3c03535c081952 SHA-256: 25c8462c3d18ac0ad963783b306ae9060253102524dfd5c664f8007e792d7cc8
60 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic

The sample is an Excel 4.0 macro sheet, indicated by the OLE_XLM_ENCRYPTED_MACROSHEET and OLE_XLM_AUTOOPEN heuristics. This suggests the file is designed to execute embedded XLM macros upon opening. The encrypted nature of the macros and the presence of an auto-execute function point towards a malicious intent, likely to download and execute a secondary payload.

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.