Xls.Dropper.Agent-8019488-0 — Office (OLE) / .XLS malware analysis

Static analysis result for SHA-256 f4decddf7c667224…

MALICIOUS

Office (OLE) / .XLS

345.5 KB Created: 2020-04-23 12:26:24 Authoring application: Microsoft Excel
MD5: 1ce9915d75fede3c7f63af69f4e667f3 SHA-1: cc9a586fbe7abfb8a9dc1a40b7cee222bd6b7a57 SHA-256: f4decddf7c66722424bc08001f76f96c7f5fffd00cecdecc6b192f1a48b0c41d
120 Risk Score

Malware Insights

Xls.Dropper.Agent-8019488-0 · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic

The sample is an encrypted Excel 4.0 macro sheet, identified by heuristics as an encrypted macro sheet and an auto-open macro. ClamAV detection confirms it as 'Xls.Dropper.Agent-8019488-0'. The encrypted nature and the presence of an auto-open macro strongly suggest it's a dropper designed to execute a malicious payload upon opening.

Heuristics 3

  • ClamAV: Xls.Dropper.Agent-8019488-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Xls.Dropper.Agent-8019488-0
  • 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.