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

Static analysis result for SHA-256 5ce84a611fe65a0a…

MALICIOUS

Office (OLE) / .XLS

196.0 KB Created: 2020-11-10 04:27:50 Authoring application: Microsoft Excel
MD5: e0162c3d7d61bcdd357929d8900d223a SHA-1: 89c4350f8831573e75cea642bfc3055f79d5ed2d SHA-256: 5ce84a611fe65a0a7b3a3a3826b5961a359dbb593c52f213fadb2286d064e360
60 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic

The sample is an Excel 4.0 macro sheet that is encrypted, which is a strong indicator of malicious intent. The presence of XLM macros suggests an attempt to execute arbitrary code, likely to download and run a secondary payload. Without further deobfuscation or script content, the exact family and payload remain unknown.

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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