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

Static analysis result for SHA-256 96f42f48d283e61f…

MALICIOUS

Office (OLE) / .XLS

215.5 KB Created: 2020-09-23 01:03:23 Authoring application: Microsoft Excel
MD5: c033723cf6b5a7652003f2df3d9933bf SHA-1: 3c9acf1a9cca782babc0082ba7fbeeedcc3f58f9 SHA-256: 96f42f48d283e61fb71f3bedc2af9cc2460526229ab2add28fdf2ed862773906
60 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic

The sample is an Excel 4.0 macro sheet that is encrypted, as indicated by the OLE_XLM_ENCRYPTED_MACROSHEET heuristic. This type of file is frequently used to download and execute further stages of malware. No specific IOCs were extracted from the document body or scripts.

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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