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

Static analysis result for SHA-256 1d40640eea28b463…

MALICIOUS

Office (OLE) / .XLS

189.5 KB Created: 2020-10-18 22:55:56 Authoring application: Microsoft Excel
MD5: 450e704a0e7bdf1683b9b971a6476f18 SHA-1: 2b7a48cbc0c379fdcea0d9dc905d2e3428e14502 SHA-256: 1d40640eea28b463d143cebdcd48c1493c4608cd66d15d2b05d62711ec36e2ae
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. The presence of an auto-open macro (OLE_XLM_AUTOOPEN) suggests that malicious code is intended to execute automatically when the file is opened. Due to the encrypted nature of the macro sheet, the specific actions and payloads could not be determined.

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.