Emotet — Office (OLE) malware analysis

Static analysis result for SHA-256 5c8b1254a5bd8b05…

MALICIOUS

Office (OLE)

156.9 KB Created: 2020-09-15 16:41:00 Authoring application: Microsoft Office Word
MD5: 01b684504be0f1d1857e41e6e8b28200 SHA-1: a26454d41eb6dc9096cd96a54bf5eab7deacab21 SHA-256: 5c8b1254a5bd8b057c07b44b9235e0d3ace748a6164e164221a31eef0e15d90f
202 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1140 Deobfuscate/Decode Files or Information

The sample is identified as malicious by ClamAV with the signature 'Doc.Malware.Emotet-9762373-0', indicating a known Emotet variant. High-severity heuristics confirm the presence of a VBA macro with an auto-execution function ('Document_open') that uses 'CreateObject', a common technique for Emotet to download and execute further stages. The VBA code itself is heavily obfuscated, but the presence of these indicators strongly suggests a macro-based downloader. No specific URLs or further obfuscated strings were directly extractable from the provided script excerpt to include as IOCs.

Heuristics 6

  • ClamAV: Doc.Malware.Emotet-9762373-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.Emotet-9762373-0
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • VBA p-code auto-exec with execution tokens high OLE_VBA_PCODE_AUTOEXEC_EXEC
    Compiled VBA/cache stream contains an auto-execution token together with shell/download/object-execution tokens. This catches p-code-only or source-extraction-failure macro documents where visible source is unavailable.
  • VBA macros detected medium OLE_VBA_MACROS
    Document contains VBA macro code
  • 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

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
093df0d9d9ab28d17e10b8a3d4d0d2f7c34db272923888f5dfa322b516df3f65		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 22905 bytes

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