Emotet — Office (OLE) malware analysis

Static analysis result for SHA-256 c7f874d459197ee0…

MALICIOUS

Office (OLE)

72.1 KB Created: 2018-11-06 12:14:00 Authoring application: Microsoft Office Word First seen: 2019-01-20
MD5: b4672a154ae9b21468b5e307e187afe1 SHA-1: 9ca1c947ab73ed7e3a5fb87133aefbcda16863e9 SHA-256: c7f874d459197ee0209f51fa13ccf05fd1e78a7ac80d09e9953142125fca0828
182 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.001 PowerShell T1059.003 Windows Command Shell T1566.001 Spearphishing Attachment

The file was detected as Emotet by ClamAV. Heuristics indicate the use of cmd.exe and PowerShell, and the document body contains a heavily obfuscated PowerShell command. This command reconstructs and executes a PowerShell script from a Base64 encoded, Deflate compressed blob, which is then used to invoke further commands, likely to download and execute a second-stage payload.

Heuristics 5

  • ClamAV: Doc.Dropper.Emotet-6769504-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Dropper.Emotet-6769504-0
  • Suspicious cmd.exe invocation with execution flag high SC_STR_CMD
    Suspicious cmd.exe invocation with execution flag
  • Reference to PowerShell high SC_STR_POWERSHELL
    Reference to PowerShell
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://schemas.openxmlformats.org/drawingml/2006/main In document text (OLE body)

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