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

Static analysis result for SHA-256 e758b12ea734ee85…

MALICIOUS

Office (OLE) / .XLS

246.0 KB Created: 2020-09-14 21:28:14 Authoring application: Microsoft Excel
MD5: 81ae5b7e0425ef813f1876a287e3c19f SHA-1: afeb5b8a3fcc28152889600c86374d31b3a1e21e SHA-256: e758b12ea734ee85058f8d42fc1dce15f535bda4ddff3b424c92fa617622a675
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 OLE_XLM_AUTOOPEN heuristic further confirms the presence of an auto-executable macro. The document body is heavily obfuscated and unreadable, suggesting it is designed to hide malicious code. Without readable document content or scripts, the exact payload delivery mechanism cannot be determined, leading to a lower confidence in family attribution.

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.