Malicious Office (OLE) / .XLS — malware analysis report

Static analysis result for SHA-256 6e2fa17e0a572833…

MALICIOUS

Office (OLE) / .XLS

187.5 KB Created: 2021-02-23 19:30:17 Authoring application: Microsoft Excel
MD5: 93df50e0beea0a09de04df73866659e2 SHA-1: 9ae443441f77e63f74ce13fc9f5b43e2bb63c39a SHA-256: 6e2fa17e0a572833becb3cc5b06d9bd4f4e8d60d8e80e1b6a23e3af72579ce29
60 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic

The sample is an Excel file identified as malicious, containing an encrypted Excel 4.0 macro sheet. The presence of encrypted macros suggests an attempt to hide malicious functionality, likely for execution upon opening. No specific family could be identified from the available evidence.

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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