Emotet — Office (OLE) / .DOCX malware analysis

Static analysis result for SHA-256 7606c587c9a22687…

MALICIOUS

Office (OLE) / .DOCX

199.0 KB Created: 2020-10-21 13:40:00 Authoring application: Microsoft Office Word
MD5: 1def9e2bc352857f1c0968816279ab3b SHA-1: 0013bc93330b338e6976a852769c9bd37a7e0247 SHA-256: 7606c587c9a22687f99deb394aedd9be63d066c53c44d9cb78dc3a03319f670c
202 Risk Score

Malware Insights

Emotet · confidence 95%

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

The file is identified as malicious by ClamAV with the signature 'Doc.Dropper.EmotetBlueUpdate1020-9780531-0', indicating a known Emotet variant. Heuristics confirm the presence of VBA macros, including an auto-executing 'Document_Open' macro that uses 'CreateObject', a common technique for executing malicious code. The VBA script is heavily obfuscated, but its structure and the heuristic firings strongly suggest it's designed to download and execute a second-stage payload, consistent with Emotet's behavior.

Heuristics 6

  • ClamAV: Doc.Dropper.EmotetiBlueUpdate1020-9780531-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Dropper.EmotetiBlueUpdate1020-9780531-0
  • 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
95eb3c5d035a5c49033717199bc50764986e3b5ab99bba0bc56e259ec5a3061f		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 23248 bytes

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