JAVA_ADWIND.AUJC

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

It executes commands from a remote malicious user, effectively compromising the affected system. It connects to a website to send and receive information.

It gathers information and reports it to its servers.

Arrival Details

This Backdoor 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 Backdoor drops the following copies of itself into the affected system and executes them:

• %User Profile%\SSyjJfwfiRB\JFCQAmPESvV.FAdufi

(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 the following files:

• %System%\test.txt -> used to check for admin rights
• %User Profile%\{SSyjJfwfiRB}\ID.txt -> contains UUID
• %User Temp%\Retrive{random numbers}.vbs -> script to detect installed AV security and Firewall products (deleted after execution)
• %User Profile%\fUTkALeaTxM\ID.txt -> contains UUID
• %User Temp%\hsperfdata_{username}\{random} -> contains details of the malware
• %ProgramData%\Java\.oracle_jre_usage\{random}.timestamp -> time usage of oracle

(Note: %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.. %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.. %ProgramData% is the Program Data folder, where it usually is C:\Program Files in Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\ProgramData in 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 drops and executes the following files:

• %User Temp%\0.{random numbers}.class -> class to be loaded by main executable JAR, also detected as JAVA_ADWIND.AUJC

(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:

• attrib +h "%User Profile%\{random characters}\*.*" -> set attribute of all files under the folder to hidden
• attrib +h "%User Profile%\{random characters}" -> set attribute of folder to hidden
• xcopy "%Program Files%\Java\jre{version}" "%Application Data%\Oracle\" /e -> copy files and directory trees of Java Installation folder to %Application Data%\Oracle folder

(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.. %Application Data% is the Application Data folder, where it usually is C:\Documents and Settings\{user name}\Application Data on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Roaming 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:

• %Application Data%\Oracle
• %User Profile%\fUTkALeaTxM
• %User Profile%\SSyjJfwfiRB\ELuWKLWnsRe -> plugin folder
• %User Profile%\SSyjJfwfiRB
• %User Temp%\hsperfdata_{User Name}
• %ProgramData%\Java\.oracle_jre_usage

(Note: %Application Data% is the Application Data folder, where it usually is C:\Documents and Settings\{user name}\Application Data on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Roaming 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.. %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.. %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.. %ProgramData% is the Program Data folder, where it usually is C:\Program Files in Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\ProgramData in 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.)

Autostart Technique

This Backdoor modifies the following registry entries to ensure it automatic execution at every system startup:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
fgovbdbXqNj = %Application Data%\Oracle\bin\javaw.exe" -jar "%User Profile%\SSyjJfwfiRB\JFCQAmPESvV.FAdufi"

Backdoor Routine

This Backdoor executes the following commands from a remote malicious user:

• Download Plug-ins
• Download and Execute Files
• Update itself
• Uninstall itself
• Reset Connection
• Terminate Process
• Sceen Capture
• Access Webcam
• Log Keystrokes

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

• {BLOCKED}bk.{BLOCKED}s.net:6050

Other Details

This Backdoor gathers the following information and reports it to its servers:

• Local IP
• Mac Address
• Size of RAM
• Country
• User Name
• OS Name
• OS Version
• If User is Admin
• Java Version