Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 81a38ea5bd699a13…

MALICIOUS

Office (OLE)

70.5 KB Created: 2020-04-15 05:50:52 Authoring application: Microsoft Excel
MD5: 163f16eeab378ec103b7fa0fe6b33fc6 SHA-1: 63d961a59956b09793165f590ab160b2f2d4b1bd SHA-256: 81a38ea5bd699a13a2364e7bfeb41018bd13e54aa660ddd1b0540900db8cb3a1
60 Risk Score

Malware Insights

MITRE ATT&CK
T1564.003 Obfuscated Files or Information: Software Packing T1059.005 Command and Scripting Interpreter: Visual Basic

The sample is an encrypted Excel 4.0 macro sheet, which is a strong indicator of malicious intent. The presence of an 'AUTOOPEN' macro suggests that the malicious code executes automatically upon opening the document. The encrypted nature of the macros prevents further analysis of the specific payload or delivery mechanism.

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.