Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 92184cdade7cfd45…

MALICIOUS

Office (OLE)

70.5 KB Created: 2020-04-15 05:50:52 Authoring application: Microsoft Excel
MD5: 7b5f61b613240d332837bd9b1a844cac SHA-1: 6717d72566efb00d0eafe5bb398fc440bb625fe5 SHA-256: 92184cdade7cfd45d527a59a8551708085329100e48048beaef4f0421bc83f00
120 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic for Applications

The sample is identified as an encrypted Excel 4.0 macro sheet, a common technique for delivering malicious payloads. ClamAV detection confirms its malicious nature, specifically flagging it as 'Xls.Dropper.Agent-7669788-0'. The presence of XLM macros indicates an attempt to execute code upon opening, likely to download and run a secondary stage. The document body was not parsable, but the heuristic firings strongly suggest a dropper functionality.

Heuristics 3

  • ClamAV: Xls.Dropper.Agent-7669788-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Xls.Dropper.Agent-7669788-0
  • 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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