Emotet — Office (OLE) malware analysis

Static analysis result for SHA-256 d5a1cbff46a6271b…

MALICIOUS

Office (OLE)

69.6 KB Created: 2018-11-07 11:39:00 Authoring application: Microsoft Office Word First seen: 2019-09-30
MD5: 613c473d9f8e90ba21a542867d9524a6 SHA-1: 78308f85c26c914a9960e70ee0f7371a5b4b2325 SHA-256: d5a1cbff46a6271bd1a3763250db9a197a3d3ea7471bdf23edccab3885d34c5d
142 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment

The file was detected as Emotet by ClamAV, a known banking trojan and downloader. Heuristics indicate the presence of PowerShell commands and a LOLBin execution attempt. The document body contains a heavily obfuscated PowerShell command that appears to decompress and execute a second-stage payload from a Base64 encoded string, likely for further malicious activity.

Heuristics 4

  • ClamAV: Doc.Dropper.Emotet-6769504-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Dropper.Emotet-6769504-0
  • 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)