Xls.Dropper.Agent-7688877-0 — Office (OLE) / .XLS malware analysis

Static analysis result for SHA-256 4b462d7cd8e4ba2d…

MALICIOUS

Office (OLE) / .XLS

55.0 KB Created: 2020-04-23 23:00:38 Authoring application: Microsoft Excel
MD5: 83bc60b05f4fe966447ca1f27babac56 SHA-1: 75a1659e39db7de3e330915397b730b9826a09a1 SHA-256: 4b462d7cd8e4ba2d1da7332df73f99f89a4da71357fb855e9b9e8cc3949f40d6
120 Risk Score

Malware Insights

Xls.Dropper.Agent-7688877-0 · confidence 95%

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.005 Visual Basic

The file is an encrypted Excel 4.0 macro sheet, indicated by the OLE_XLM_ENCRYPTED_MACROSHEET heuristic. The CLAMAV_DETECTION heuristic identifies it as 'Xls.Dropper.Agent-7688877-0', suggesting its purpose is to drop or execute other malware. The presence of an auto-open macro (OLE_XLM_AUTOOPEN) further supports its role as an initial execution vector.

Heuristics 3

  • ClamAV: Xls.Dropper.Agent-7688877-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Xls.Dropper.Agent-7688877-0
  • 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.