Trojan.X97M.EMOTET.YJCBC

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.

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 -> Detected as Trojan.Win32.FRS.VSNW02B22
• %ProgramData%\jledshf.bat -> Detected as TROJ_FRS.VSNTB422

(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:

• cmd /c ""%ProgramData%\jledshf.bat" "
• powershell -enc {base64 encoded command}
• "%System%\cmd.exe" /c start /B %Windows%\syswow64\rundll32.exe C:\ProgramData\vbkwk.dll,dfsgeresd
• wscript %ProgramData%\wetidjks.vbs

(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.)

Download Routine

This Trojan connects to the following website(s) to download and execute a malicious file:

• http://ac{BLOCKED}es.laforetlanguages.com/wp-admin/BlkdOKDXL/
• http://s{BLOCKED}ve.com.br/rjuz/w/
• https://t{BLOCKED}x.com/wp-admin/y5Aa1jt0Sp2Qk/
• https://www.pa{BLOCKED}ns.co.in/abc/Y6Y0fTbUEg6/
• https://biz.m{BLOCKED}n.ua/wp-admin/W6agtFSRZGt371dV/
• http://b{BLOCKED}.site/3yztzzvh/nmY4wZfbYL/
• https://pa{BLOCKED}d.com/wp-content/NR/
• https://dauji{BLOCKED}ndir.org/wp-includes/63De/
• https://d{BLOCKED}s.com/wp-includes/Zkj4QO/
• https://anu{BLOCKED}nal.co.id/wp-admin/SJbxE5I/
• https://at{BLOCKED}ic.cl/sistemas/3ZbsUAU/
• https://an{BLOCKED}een.com/Fox-C404/mDHkfgebMRzmGKBy/

It saves the files it downloads using the following names:

• C:\ProgramData\vbkwk.dll

NOTES:

This Trojan does the following:

• It contains the following message details luring users to enable macro content: