Emotet — Office (OLE) / .DOC malware analysis

Static analysis result for SHA-256 70ea160fde803539…

MALICIOUS

Office (OLE) / .DOC

138.9 KB Created: 2020-09-28 21:18:00 Authoring application: Microsoft Office Word
MD5: ecc79292759f11dadbba5a4b88b0e8a0 SHA-1: e763159d5050e5e2ea22bdd0fe5cb325a81b71a3 SHA-256: 70ea160fde803539083eb208609b17b5910f502f8bb0a3e36e053ece5b214df2
202 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment

The sample contains a VBA macro that is automatically executed upon opening the document, as indicated by the 'Document_Open' and 'OLE_VBA_PCODE_AUTOEXEC_EXEC' heuristics. The macro uses 'CreateObject' to instantiate objects and executes obfuscated code, which is a common technique for Emotet. The ClamAV detection also explicitly names Emotet. The macro appears to be designed to download and execute a second-stage payload.

Heuristics 6

  • ClamAV: Doc.Malware.Emotet-9769000-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.Emotet-9769000-0
  • 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
af1832d1f4c91fc85d2c99e2822b1b7480a5e715a732a96dc374f162b3694b82
vba-macro oletools.olevba.extract_macros (decoded VBA source) 6632 bytes