BKDR_GATES.Q

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 is used to load and execute a file.

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.

Backdoor Routine

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

• Perform remote shell
• Launch DDoS (distributed denial of service) attack using any of the following flood methods:
  • UPD flood
  • TCP flood
  • SYN flood
  • ICMP flood
• Update copy of itself
• Download arbitrary files

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

• {BLOCKED}.{BLOCKED}.41.219

Information Theft

This backdoor gathers the following data:

• OS version
• Processor information
• Processor performance (\Processor({number})\% Processor Time)
• Network Interface performance (Network Interface({name})\Bytes Total/sec)
• List of Devices

Other Details

This backdoor is used to load and execute the following file:

• %System%\libamplify.dll

(Note: %System% is the Windows system folder, which is usually C:\Windows\System32.)

NOTES:

It will read the following files:

• {malware path}\conf.n
• {malware path}\cmd.n

It queries the following registry key to get the processor information:

• HKEY_LOCAL_MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\{number}\~MHz

It will not perform its intended routine if the following strings are present in Network Interface:

• Loopback
• Virtual
• MAC

It checks if the following files are present:

• {Directory}\agony.exe
• {Directory}\DNSSupport.exe
• {Directory}\DNSProtection.exe
• {Directory}\agony.sys
• {Directory}\agony.exe
• {Directory}\conf.n
• {Directory}\cmd.n
• {Directory}\svch0st.exe

where {Directory} can be any of the following:

• %Program Files%\Windows Media Player
• {malware path}

If the files are found, it will execute the following as hidden processes:

• {Directory}\agony.exe -tcp 45000
• {Directory}\agony.exe -tcp 45100
• {Directory}\agony.exe -s DNSSupport
• {Directory}\agony.exe -p DNSSupport.exe
• {Directory}\agony.exe -p DNSProtection.exe
• {Directory}\agony.exe -f DNSSupport.exe
• {Directory}\agony.exe -f DNSProtection.exe
• {Directory}\agony.exe -f agony.sys
• {Directory}\agony.exe -f agony.exe
• {Directory}\agony.exe -f conf.n
• {Directory}\agony.exe -f cmd.n
• {Directory}\agony.exe -f svch0st.exe