Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 f28257175a229bff…

MALICIOUS

Office (OLE)

303.5 KB Created: 2020-07-15 07:56:55 Authoring application: Microsoft Excel
MD5: a9f1b07edab2c292b4e38b8c76409a4d SHA-1: 9e0121e5fa6899a9452b30715ffb76897f18b1ec SHA-256: f28257175a229bff967088192456a010d4111942543228c1dce4d4bda202815a
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 suggests that the macro is designed to execute automatically upon opening the document. The document body is heavily obfuscated and unreadable, preventing further analysis of its specific intent. However, the encryption and auto-execution strongly suggest a malicious downloader or dropper.

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.