Emotet — Office (OLE) / .XLSX malware analysis

Static analysis result for SHA-256 4082a7ccfab37544…

MALICIOUS

Office (OLE) / .XLSX

138.0 KB Created: 2022-02-09 09:48:26 Authoring application: Microsoft Excel
MD5: 8c59c001ba5314da302de4084706b903 SHA-1: ecef0f97865f2a2f4f7596978ad5d6d6d6354788 SHA-256: 4082a7ccfab375442bc1fcb1907f2c125293ca6aed9b3ec09b04b6252d5a4f6a
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 the URLs: 'http://midnighsilverbcraft.com/store/wBjNOUwc/B110N4cA6R3/', 'http://tempra.com/NAT_05_22_2009/BI710N4cA6R3/', and 'https://redington.karmat'. It also writes two files to disk: '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
5cd105e88d3aaa29b94f111179566b52261ce5df80e42f029365d6abaf2c6c1b		 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.