Backdoor.Win32.PLEAD.AI

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 does not have any file infection routine.

It does not have any propagation routine.

It executes commands from a remote malicious user, effectively compromising the affected system.

It does not have any information-stealing capability.

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.

Infection Points

This Backdoor does not have any file infection routine.

Installation

This Backdoor drops the following files:

• {malware path}\wmpnetwk.rtf -> contains strings from the resources.
• %User Temp%\{random number}.tmp -> contains date and time malware executed and MUTEX value

(Note: %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).)

It adds the following mutexes to ensure that only one of its copies runs at any one time:

• {date and time executed}_19162222

Propagation

This Backdoor does not have any propagation routine.

Backdoor Routine

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

• Executes arbitrary commands

Rootkit Capabilities

This Backdoor does not have rootkit capabilities.

Information Theft

This Backdoor does not have any information-stealing capability.

Other Details

This Backdoor does the following:

• It will access the following URLs to get the arbitrary codes (However, the said sites don't contain arbitrary codes to execute as of publishing.):
  • http://sakura.{BLOCKED}o.com/Default.jsp -> redirects to the 2nd URL
  • https://www.{BLOCKED}mains.com/domain_profile.cfm?d=wesogo&e=com