Emotet — Office (OLE) malware analysis

Static analysis result for SHA-256 5cc2c35639df7e40…

MALICIOUS

Office (OLE)

80.8 KB Created: 2018-11-08 23:11:00 Authoring application: Microsoft Office Word First seen: 2019-03-18
MD5: 27fb231b63c9d21a51de7495b7431674 SHA-1: 75331d6790135e4095ea41d535344c2a80fc35aa SHA-256: 5cc2c35639df7e4087bfb94f330de88596ddf81209d25de9f4b92fe5175ef7c7
182 Risk Score

Malware Insights

Emotet · confidence 95%

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

This document contains a heavily obfuscated PowerShell command that, when deobfuscated, downloads and decompresses a second-stage payload. The ClamAV detection and the PowerShell heuristic strongly indicate this is an Emotet dropper. The embedded URL is benign and likely a remnant of document formatting.

Heuristics 5

  • 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
  • OLE document has large unaccounted-for region high OLE_SLACK_ANOMALY
    OLE file is 82,688 bytes but its declared streams total only 48,195 bytes — 34,493 bytes (42%) live in unallocated sector slack. This is the canonical hiding place for pre-macro-era Office exploit payloads (XOR-encoded shellcode reached via a parser pointer-corruption bug in the document structure).
  • 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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