Emotet — Office (OLE) / .XLSX malware analysis

Static analysis result for SHA-256 efe397cdcec4b6f6…

MALICIOUS

Office (OLE) / .XLSX

138.0 KB Created: 2022-02-09 09:48:26 Authoring application: Microsoft Excel
MD5: b1d58f80ccdda50a58240d4ab32577a0 SHA-1: 77116657854e9e24986723aefdd3586ed9ac9c82 SHA-256: efe397cdcec4b6f67c69da0b48058689436391d8c6f1771f2a1d47055feb3a15
240 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1059.001 PowerShell T1105 Ingress Tool Transfer

The sample contains VBA macros, specifically a Workbook_Open auto-execution routine, which is a common delivery mechanism for Emotet. The script attempts to download and execute a second-stage payload from multiple URLs, including 'http://midnighsilverbcraft.com/store/wBjNOUw/B710N4cA6R3/' and 'https://redington.karmaat', and saves them as 'c:\programdata\oue4hjld.vbs' and 'c:\programdata\bhnasleil.bat'. The ClamAV detection name 'Doc.Downloader.EmotetRed02220-9938909-0' further supports the Emotet family attribution.

Heuristics 6

  • ClamAV: Doc.Downloader.EmotetRed02220-9938909-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.EmotetRed02220-9938909-0
  • 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
d9e3ff20556809426d86e36a9f2804a6b60e3721c98e10eca31d562b3f8a6a84		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 52433 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.