Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 c3b92516dd77bf74…

MALICIOUS

Office (OLE)

340.5 KB Created: 2020-07-13 11:03:58 Authoring application: Microsoft Excel First seen: 2020-09-15
MD5: 1591dce6e9ac5b9cfc8246d1113a14e8 SHA-1: f9248ab4978f521c1052a6d54932aadeb8a56560 SHA-256: c3b92516dd77bf745e32aa4ffc4db810f0dbb9d290989235c71489b75910917d
120 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic

The sample is an encrypted Excel 4.0 macro sheet, identified by heuristics as containing malicious content. The presence of an 'AUTOOPEN' macro suggests an attempt to automatically execute code upon opening. The ClamAV detection 'Xls.Dropper.Agent' further confirms its malicious nature as a dropper.

Heuristics 3

  • ClamAV: Xls.Dropper.Agent-8840554-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Xls.Dropper.Agent-8840554-0
  • 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.

Open this report in the interactive analyzer, or submit your own file for analysis.