Trojan.XF.EMOTET.YXCBC

February 15, 2022
 Analysis by: Maria Emreen Viray
 ALIASES:

TrojanDownloader:O97M/Emotet.SM!MTB (MICROSOFT)

 PLATFORM:

Windows

 OVERALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:
 INFORMATION EXPOSURE:

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

  TECHNICAL DETAILS

File Size:

154,112 bytes

File Type:

XLS

Memory Resident:

No

Initial Samples Received Date:

14 Feb 2022

Arrival Details

This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Installation

This Trojan drops the following files:

  • %ProgramData%\wetidjks.vbs
  • %ProgramData%\jledshf.bat
  • %ProgramData%\vbkwk.dll

(Note: %ProgramData% is a version of the Program Files folder where any user on a multi-user computer can make changes to programs. This contains application data for all users. This is usually C:\ProgramData on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit), or C:\Documents and Settings\All Users on Windows Server 2003(32-bit), 2000(32-bit) and XP.)

It adds the following processes:

  • wscript %ProgramData%\wetidjks.vbs
  • cmd /c ""%ProgramData%\jledshf.bat" "
  • powershell -enc {encoded string}
  • "%System%\cmd.exe" /c start /B %Windows%\syswow64\rundll32.exe %ProgramData%\vbkwk.dll,dfsgeresd

(Note: %ProgramData% is a version of the Program Files folder where any user on a multi-user computer can make changes to programs. This contains application data for all users. This is usually C:\ProgramData on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit), or C:\Documents and Settings\All Users on Windows Server 2003(32-bit), 2000(32-bit) and XP.. %Windows% is the Windows folder, where it usually is C:\Windows on all Windows operating system versions.)

Other Details

This Trojan connects to the following possibly malicious URL:

  • http://actividades.{BLOCKED}tlanguages.com/wp-admin/BlkdOKDXL/
  • http://{BLOCKED}live.com.br/rjuz/w/
  • https://{BLOCKED}x.com/wp-admin/y5Aa1jt0Sp2Qk/
  • https://www.{BLOCKED}sons.co.in/abc/Y6Y0fTbUEg6/
  • https://biz.{BLOCKED}n.ua/wp-admin/W6agtFSRZGt371dV/
  • http://{BLOCKED}vn.site/3yztzzvh/nmY4wZfbYL/
  • https://{BLOCKED}kood.com/wp-content/NR/
  • https://{BLOCKED}aharajmandir.org/wp-includes/63De/
  • https://{BLOCKED}ts.com/wp-includes/Zkj4QO/
  • https://{BLOCKED}ahmasinternasional.co.id/wp-admin/SJbxE5I/
  • https://{BLOCKED}c.cl/sistemas/3ZbsUAU/
  • https://{BLOCKED}lbasateen.com/Fox-C404/mDHkfgebMRzmGKBy/