Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 973b257645dc871d…

MALICIOUS

Office (OLE)

825.0 KB Created: 2020-07-06 14:05:22 Authoring application: Microsoft Excel First seen: 2020-07-24
MD5: 988237dcf4cc42b8262c4875db65df9b SHA-1: e14e5789857df8284705f0902ec96857a1dc5a13 SHA-256: 973b257645dc871da9c57c911ae987fe8be1cb6c7498d3e6355c5508d3c25909
60 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic

The file is an Excel 4.0 macro sheet that is encrypted, which is a strong indicator of malicious intent. The presence of an 'AUTOOPEN' macro further suggests that the file is designed to execute code automatically when opened. No specific family could be identified due to the encryption and lack of further script details.

Heuristics 2

  • 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.

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