Emotet — Office (OLE) / .DOCX malware analysis

Static analysis result for SHA-256 c4313307b550b117…

MALICIOUS

Office (OLE) / .DOCX

154.6 KB Created: 2020-12-28 15:43:00 Authoring application: Microsoft Office Word
MD5: f036b732cc4ca32e7f2a49505831c166 SHA-1: 863344abe7fa56cf6a964a5e581a80ccc88bce29 SHA-256: c4313307b550b117674ae7c889b2caa8789d1b3bb43f830c73b4be36bf0ecac3
280 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1204.002 Malicious File

The file contains VBA macros, specifically a Document_Open auto-execution macro, which is a common delivery mechanism for Emotet. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document's content is designed to prompt the user for a password to access an archive, a tactic often used to bypass security scanning. The ClamAV detection further supports the Emotet family attribution. The VBA macro likely downloads and executes a second-stage payload.

Heuristics 8

  • ClamAV: Doc.Downloader.EmotetRed02224-9938637-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.EmotetRed02224-9938637-0
  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Suspicious extracted artifact high EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
  • 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
a004a96685dc375590aeec65acf06fce9e74ef2bbe0aa7a48bc315f9645e3700		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 6009 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved macro source contains an auto-exec entry point and execution/download terms.

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