Backdoor:W32/SdBot.CKN

Classification

Category :

Malware

Type :

Backdoor

Aliases :

Backdoor:W32/SdBot.CKN

Summary

A remote administration tool (RAT) that bypasses the security features of a program, computer or network to give unauthorized access or control to its user.

Removal

Based on the settings of your F-Secure security product, it will either move the file to the quarantine where it cannot spread or cause harm, or remove it.

A False Positive is when a file is incorrectly detected as harmful, usually because its code or behavior resembles known harmful programs. A False Positive will usually be fixed in a subsequent database update without any action needed on your part. If you wish, you may also:

  • Check for the latest database updates

    First check if your F-Secure security program is using the latest updates, then try scanning the file again.

  • Submit a sample

    After checking, if you still believe the file is incorrectly detected, you can submit a sample of it for re-analysis.

    Note: If the file was moved to quarantine, you need to collect the file from quarantine before you can submit it.

  • Exclude a file from further scanning

    If you are certain that the file is safe and want to continue using it, you can exclude it from further scanning by the F-Secure security product.

    Note: You need administrative rights to change the settings.

Technical Details

Backdoor:W32/SdBot.CKN is a backdoor trojan that attempts to contact a remote server and allow a remote attacker access to the infected machine.

Installation

After the backdoor's file is run, it checks for the existence of Virtual Machines (VM) and immediately exits if any VM environment such as VMware is detected.

If no VM environment is present, the backdoor decrypts its code and injects it into the explorer.exe process.

Activity

Once active, the backdoor attempts to connect to the following remote IRC server on TCP port 81:

  • [Removed].xn--mg-kka.com

The backdoor generates a random nickname and joins a password-protected channel:

  • #ohai

The backdoor then waits for commands from a channel operator.

A remote hacker who is controlling the backdoor can do any of the following:

  • Update the backdoor's file from the Internet
  • Perform an SYN flood
  • Perform a Distributed Denial of Service (DDoS) attack

File System Changes

Creates these files:

  • ise32.exe

Process Changes

Creates these mutexes:

  • asd-6+094997__