Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 1369f1076675f806…

MALICIOUS

Office (OLE)

390.5 KB Created: 2020-04-23 12:26:24 Authoring application: Microsoft Excel First seen: 2020-07-24
MD5: 9acf4fdfed5ee983f6ce6916238a78b4 SHA-1: c9e17a1b04276976edfe94e48186cee0f88b9c16 SHA-256: 1369f1076675f806c3dd92cec3d1115f2e94487a2701af820d31043550b9dc02
60 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic

The file is an Excel 4.0 macro sheet that is encrypted, which is a strong indicator of malicious intent. The presence of an 'AUTOOPEN' macro further suggests that malicious code is designed to execute automatically when the document is opened. No specific family could be identified due to the encryption and lack of further script details.

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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