Emotet — Office (OLE) malware analysis

Static analysis result for SHA-256 858406ec8fcc6d86…

MALICIOUS

Office (OLE)

133.0 KB Created: 2020-10-14 19:03:00 Authoring application: Microsoft Office Word
MD5: 1e4983f29edba02cb7c9b282f5a980c6 SHA-1: f2b274bc6f71c077c56f32dadf2f7f099b3a360d SHA-256: 858406ec8fcc6d86951cea8677cbce8aab2b53b480d01137957af3f60539ccb8
202 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample was detected as Emotet by ClamAV and exhibits high-confidence heuristics for VBA macros, including an auto-executing Document_Open macro and a CreateObject call. The VBA script contains obfuscated code, but the presence of `CreateObject` suggests it is designed to download and execute a second-stage payload. The `macros.bas` file is identified as the source of this malicious behavior.

Heuristics 6

  • ClamAV: Doc.Downloader.Emotet-9778091-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Emotet-9778091-0
  • 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
35ba581a7d07c242723817cd679240b29046cc2a7f4485862374591738596dda		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 9454 bytes

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