Xls.Dropper.Agent-7836246-0 — Office (OLE) malware analysis

Static analysis result for SHA-256 752d2969aa9d5098…

MALICIOUS

Office (OLE)

56.0 KB Created: 2020-05-18 07:32:17 Authoring application: Microsoft Excel First seen: 2020-09-07
MD5: e46b4a4de548fef6b187da2ccb62ac37 SHA-1: 5919f70120c9f17a18d749ac0cfac773d3426ead SHA-256: 752d2969aa9d5098f46a1ba6463741b1e2ec4fec3307c58216c40664d65ea4dd
120 Risk Score

Malware Insights

Xls.Dropper.Agent-7836246-0 · 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 malicious dropper. The macro sheet is likely responsible for downloading and executing a secondary payload, a common technique for this type of malware. The specific ClamAV detection name provides a strong indicator for the family.

Heuristics 3

  • ClamAV: Xls.Dropper.Agent-7836246-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Xls.Dropper.Agent-7836246-0
  • 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.