Ransom.Win32.SUGARCRYPT.YXCBC

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

It connects to certain websites to send and receive information.

It drops files as ransom note. It avoids encrypting files with the following file extensions.

Arrival Details

This Ransomware 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 Ransomware adds the following processes:

• "notepad.exe" %Desktop%\BackFiles_encoded01.txt

(Note: %Desktop% is the current user's desktop, which is usually C:\Documents and Settings\{User Name}\Desktop on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\Desktop on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)

Other System Modifications

This Ransomware adds the following registry entries:

HKEY_LOCAL_MACHINE\SOFTWARE\9F42BF46A4453FD39BB6BBD8BEFFBE21
1 = 1

HKEY_CURRENT_USER\Software\9F42BF46A4453FD39BB6BBD8BEFFBE21
1 = 1

HKEY_CURRENT_USER\Software\9F42BF46A4453FD39BB6BBD8BEFFBE21
2 = +MI/icAn8e2FnCZTEPQ3Gy/r9GQ0PeuvwoWTYt0dK2Zk4Vl3ggpHJFBxX3BG2gTEQF7Vj6B1ikvGT0pDv4iOQ7vKeOLHjr6kAlnphbSHvVBI3lOE8uP7t5kKbUda/qIpg9vOU8/dHXZ12VLkg+tSN0vx1i3NB5Qdm/S1Kc8/qixJXkZIanOgXb6EJZ298

HKEY_CURRENT_USER\Software\9F42BF46A4453FD39BB6BBD8BEFFBE21
3 = EWm26Hx+MeXQwSz0UG9SzqPKB92RJWQqWwCYYg==

Dropping Routine

This Ransomware drops the following files:

• %Desktop%\BackFiles_encoded01.txt

(Note: %Desktop% is the current user's desktop, which is usually C:\Documents and Settings\{User Name}\Desktop on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\Desktop on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)

Download Routine

This Ransomware connects to the following URL(s) to download its component file(s):

• http://cdn2546713.{BLOCKED}afiles.com/data23072021_1.dat

Other Details

This Ransomware adds the following registry keys:

HKEY_LOCAL_MACHINE\SOFTWARE
9F42BF46A4453FD39BB6BBD8BEFFBE21 =

HKEY_CURRENT_USER\Software
9F42BF46A4453FD39BB6BBD8BEFFBE21 =

It connects to the following URL(s) to get the affected system's IP address:

• http://{BLOCKED}myipaddress.com/

It connects to the following website to send and receive information:

• http://{BLOCKED}.{BLOCKED}.{BLOCKED}.195/ → Used HTTP POST request

It accesses the following URL(s) to get the affected system's location:

• http://www.{BLOCKED}ation.com/

Ransomware Routine

This Ransomware avoids encrypting files with the following strings in their file name:

• BOOTNXT
• bootmgr
• pagefile

It avoids encrypting files found in the following folders:

• \windows
• \DRIVERS
• \PerfLogs
• \temp
• \boot

It appends the following extension to the file name of the encrypted files:

• .encoded01

It drops the following file(s) as ransom note:

• {Encrypted Directory}\BackFiles_encoded01.txt
  

It avoids encrypting files with the following file extensions:

• .exe
• .dll
• .sys
• .lnk
• .bat
• .cmd
• .ttf
• .manifest
• .ttc
• .cat
• .msi