Threat Description

Backdoor:​W32/Pushbot.gen!A

Details

Category: Malware
Type: Backdoor
Platform: W32

Summary



A remote administration utility which bypasses normal security mechanisms to secretly control a program, computer or network.



Removal



Automatic Disinfection

Allow F-Secure Anti-Virus to disinfect the relevant files.

For more general information on disinfection, please see Removal Instructions.



Technical Details



Pushbot is a backdoor program that can be operated through IRC. The backdoor is usually sized around 28-55KB.Pushbot is able to propagate through multiple vectors:

  • Removable media such as USB thumb drives
  • Instant Messaging (IM) networks such as AIM, MSN, ICQ and Triton
  • Network shares
  • Peer-to-Peer (P2P) networks such as Edonkey2000, Morpheus, KAZAA, LimeWire, BearShare and Grokster (via the application's shared folders)

Installation

During installation, the backdoor program creates a copy of itself in:

  • %windir%\service.exe

Activity

Upon execution, Pushbot displays the following:

While active, the program has the following functionalities:

  • Perform SYN Floods
  • Perform Distributed Denial of Service (DDoS) attacks
  • View MSN, AIM and Triton Threads
  • Propagate via AIM, MSN and Triton
  • Download files
  • Update itself
  • Steal passwords from Protected Storage
  • View processes
  • Create processes
  • Visit user defined websites
  • Perform shell executions

The backdoor program is also able to detect applications or services such as VMware, Nepenthes, sandboxes and honeypots.

Registry

The backdoor program creates the following Registry key in order to automatically execute its copy in the Windows directory:

  • SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Windows Services = "service.exe"

It also creates the following Autorun.inf to facilitate its propagation on removable media such as USB thumb drives:

  • [autorun]open=RECYCLER\S-1-6-21-2434476501-1644491937-600003330-1213\autorunme.exeicon=%SystemRoot%\system32\SHELL32.dll,4action=Open folder to view filesshell\open=Openshell\open\command=RECYCLER\S-1-6-21-2434476501-1644491937-600003330-1213\autorunme.exeshell\open\default=1





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