Emotet — Office (OLE) / .XLSX malware analysis

Static analysis result for SHA-256 314cc878a7cd08c1…

MALICIOUS

Office (OLE) / .XLSX

121.0 KB Created: 2015-06-05 18:17:20 Authoring application: Microsoft Excel
MD5: 41cb9d1c02832af649fb2e5350693e59 SHA-1: afcec74380ff0d5c46e8bd67c4eda2fc7a6f1848 SHA-256: 314cc878a7cd08c145e55ef7252f7c99aca00881faaab6b0c643ac4b7a017b8b
280 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.001 PowerShell T1059.003 Windows Command Shell T1204.002 Malicious File T1566.001 Spearphishing Attachment

The file is detected as Emotet by ClamAV and exhibits high-confidence heuristics for VBA macros, specifically a Workbook_Open auto-execution event and a CreateObject call to Wscript.Shell. The embedded VBA script, while obfuscated, appears to be designed to execute commands from the document body. The document body contains a long, obfuscated batch command that attempts to download and execute a payload from multiple URLs. The reconstructed URL 'http://lbsbriefs.com/cg/2kl8X826xEKeuhI/' is a primary indicator. The presence of Wscript.Shell and the execution of external commands strongly suggest a downloader functionality.

Heuristics 7

  • ClamAV: Xls.Downloader.Emotet-ab81c42b2bd4747e-9951196-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Xls.Downloader.Emotet-ab81c42b2bd4747e-9951196-0
  • Reference to Windows Script Host high SC_STR_WSCRIPT
    Reference to Windows Script Host
  • Workbook_Open macro high OLE_VBA_WBOPEN
    Workbook_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

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
faf50200d5a9adeeda00cc1da1bbf8f6abf0317a1e97a58db8ae804ba12ba446		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 13985 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved macro source contains an auto-exec entry point and execution/download terms.

Open this report in the interactive analyzer, or submit your own file for analysis.