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

Static analysis result for SHA-256 2aa94a2132c3fff4…

MALICIOUS

Office (OLE) / .XLS

45.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: d2059f4327d96d5ecaf79ad3fa253776 SHA-1: 167329901b315a50131866cbfeb9cc2d9fc887e9 SHA-256: 2aa94a2132c3fff4f8cef0c592bdd8f9a17f5a08543da9529642885e30a17c4f
60 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic

The sample is an encrypted Excel 4.0 macro sheet, which is a strong indicator of malicious intent. The presence of an 'AUTOOPEN' macro further suggests that the sheet is designed to execute automatically upon opening. While no specific URLs or scripts were extracted, the encryption and macro usage point towards a downloader or obfuscated payload delivery.

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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