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

Static analysis result for SHA-256 ccf3379e55edc270…

MALICIOUS

Office (OLE) / .XLS

53.0 KB Created: 2020-04-28 14:00:40 Authoring application: Microsoft Excel
MD5: 6c01edca96a547333147a5cb745ea257 SHA-1: b80d0ba0e898d6dcb28eb24b2b93cd8e386e3b6a SHA-256: ccf3379e55edc2703beb26a65062870896653b7fb64215a2ff59302edf7f7c06
60 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic

The sample is an encrypted Excel 4.0 macro sheet, indicated by the OLE_XLM_ENCRYPTED_MACROSHEET heuristic. The presence of an auto-open macro (OLE_XLM_AUTOOPEN) suggests an attempt to automatically execute malicious code upon opening. Due to the encryption and lack of readable document body or script content, the exact payload and delivery mechanism cannot be determined, leading to an unknown family attribution and reduced confidence.

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.

Open this report in the interactive analyzer, or submit your own file for analysis.