Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 c649bb64c9dc1444…

MALICIOUS

Office (OLE)

356.5 KB Created: 2020-07-13 11:03:58 Authoring application: Microsoft Excel First seen: 2020-09-07
MD5: 5c7d60d78ce275b07e473dcfa2bbb5ec SHA-1: 1d770eda584a966708e9ced9501556798129c504 SHA-256: c649bb64c9dc14442065457270d02182ae8e76a950f9ebf55ae20556cd56faae
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 AUTOOPEN macro further suggests that malicious code is intended to execute automatically when the file is opened. The document body was unreadable, preventing a more specific analysis of the lure or payload.

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.