Backdoor.Java.ADWIND.THBBGBO

This Backdoor arrives as an attachment to email messages mass-mailed by other malware/grayware or malicious users.

Arrival Details

This Backdoor arrives as an attachment to email messages mass-mailed by other malware/grayware or malicious users.

Installation

This Backdoor adds the following folders:

• %User Profile%\Oracle
• %User Profile%\.oracle_jre_usage
• %User Profile%\java

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

It drops the following copies of itself into the affected system:

• %User Profile%\java\JRE.text

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

It adds the following processes:

• %Program Files%\Java\jdk1.8.0_77\bin\javaw.exe" -jar "{Original File Path}
• %Application Data%\Oracle\bin\javaw.exe -jar %User Profile%\java\JRE.text
• cmd.exe /C cscript.exe %User Temp%\Retrive{Random Numbers}.vbs
• cscript.exe %User Temp%\Retrive{Random Numbers}.vbs
• xcopy "%Program Files%\Java\jdk1.8.0_77\jre" "%Application Data%\Oracle\" /e
• reg add HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run /v java /t REG_EXPAND_SZ /d "\"%Application Data%\Roaming\Oracle\bin\javaw.exe\" -jar \"%User Profile%\java\JRE.text\"" /f
• attrib +h "%User Profile%\java\*.*"
• attrib +h "%User Profile%\java"

(Note: %Program Files% is the default Program Files folder, usually C:\Program Files in Windows 2000(32-bit), Server 2003(32-bit), XP, Vista(64-bit), 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit) , or C:\Program Files (x86) in Windows XP(64-bit), Vista(64-bit), 7(64-bit), 8(64-bit), 8.1(64-bit), 2008(64-bit), 2012(64-bit) and 10(64-bit).. %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name} on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).. %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Local\Temp on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)

Autostart Technique

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

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
java = %Application Data%\Roaming\Oracle\bin\javaw.exe" -jar "%User Profile%\java\JRE.text

Dropping Routine

This Backdoor drops the following files:

• %System%\test.txt
• %User Profile%\java\ID.txt
• %User Profile%\.oracle_jre_usage\f9b9f6b9014e1b80.timestamp
• %User Profile%\.oracle_jre_usage\4b2fb7921108293.timestamp
• %User Temp%\hsperfdata_{username}\{process ID}
• %User Temp%\Retrive{Random Numbers}.vbs

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