Xls.Dropper.Agent-7683512-0 — Office (OLE) malware analysis

Static analysis result for SHA-256 44807659af7eee02…

MALICIOUS

Office (OLE)

59.0 KB Created: 2020-04-22 04:43:55 Authoring application: Microsoft Excel First seen: 2020-07-24
MD5: 17773332e562f970463caf0f91b46608 SHA-1: f7443c4be7f1fcb9947a12f14b4ea310e386c40f SHA-256: 44807659af7eee023cb0b929fe9593007ab48f98455f5a9878d9321a541f8e67
120 Risk Score

Malware Insights

Xls.Dropper.Agent-7683512-0 · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic

The critical ClamAV heuristic and the presence of an encrypted Excel 4.0 macro sheet strongly indicate a dropper functionality. The macro sheet is likely responsible for downloading and executing a secondary payload, a common technique for malware distribution.

Heuristics 3

  • ClamAV: Xls.Dropper.Agent-7683512-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Xls.Dropper.Agent-7683512-0
  • 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.