JAVA_ADWIND.JEJOTT

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 a copy of itself in the following folders using different file names:

• %User Profile%\JDHDjdjhdHSdd\fkfkfJHDSHDgd.fkdihdLKD

(Note: %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003, or C:\Users\{user name} on Windows Vista and 7.)

It drops and executes the following files:

• %User Temp%\NYdxYINIkY3108010927240480944.exe

(Note: %User Temp% is the user's temporary folder, where it usually is C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local\Temp on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.)

It adds the following processes:

• cmd.exe /c %User Temp%\NYdxYINIkY3108010927240480944.exe -f %User Temp%\mgPAUlXdXk7506812627855498900.txt
• cmd.exe /C cscript.exe %User Temp%\Retrive{random numbers}.vbs

(Note: %User Temp% is the user's temporary folder, where it usually is C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local\Temp on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.)

It creates the following folders with attributes set to System and Hidden to prevent users from discovering and removing its components:

• %User Profile%\JDHDjdjhdHSdd

(Note: %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003, or C:\Users\{user name} on Windows Vista and 7.)

Autostart Technique

This Trojan adds the following registry entries to enable its automatic execution at every system startup:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
DKDKudkjd = "%Application Data%\Oracle\bin\javaw.exe" -jar "%User Profile%\JDHDjdjhdHSdd\fkfkfJHDSHDgd.fkdihdLKD"

Dropping Routine

This Trojan drops the following files:

• Drops files:
• %User Temp%\Retrive{random numbers}.vbs
• %System%\test.txt
• %User Profile%\JDHDjdjhdHSdd\ID.txt
• %User Temp%\Windows6033402269128687774.dll
• %User Profile%\JDHDjdjhdHSdd\FDKkdKD\IlOciRpaHN.djmcjkHS
• %User Temp%\NYdxYINIkY3108010927240480944.exe
• %User Temp%\mgPAUlXdXk7506812627855498900.txt

(Note: %User Temp% is the user's temporary folder, where it usually is C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local\Temp on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.. %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.. %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003, or C:\Users\{user name} on Windows Vista and 7.)

Other Details

This Trojan connects to the following possibly malicious URL:

• {BLOCKED}.{BLOCKED}.217.22:1604