Content

IRC/Flood.bu

Type
Trojan
SubType
Denial Of Svc
Discovery Date
04/08/2003
Length
Varies
Minimum DAT
4258 (04/16/2003)
Updated DAT
4279 (07/23/2003)
Minimum Engine
5.1.00
Description Added
04/10/2003
Description Modified
04/10/2003 5:28 PM (PT)
Risk Assessment
Corporate User
Low
Home User
Low

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Characteristics

This description is intended as a general guide. The specific actions taken are decided by the hacker who creates the dropper file or uses the trojan.

This is an Internet Relay Chat BOT/DDoS tool. It is dropped by a self-extracting archive which includes a copy of the mIRC client within itself. This allows users who do not run mIRC to become used in a DDoS attack.

When run, the dropper creates a directory and extracts several files to it. The extracted files are in the following categories:

  • IRC script instruction for various trojan activities.
  • mIRC configuration file.
  • Batch file to perform remote login, remote launches.
  • mIRC executable for remote connection and remote access.
  • HideWindow application to hide the mIRC window.
  • RemoteProcessLaunch application to launch EXEs.

    • The following username/password combinations are used by the batch file (username, password):

  • administrator, administrator
  • administrator, "" (blank)
  • test, test
  • administrator, 123
  • administrator, temp
  • administrator, 1234
  • administrator, pass
  • administrator, password
  • administrator, admin
  • root, root
  • Administrator, Jrjestelmnvalvoja
  • admin, admin

    • The dropper file received by AVERT created a registry entry to run again at Windows startup:

  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
    "NTFix" = %Trojan File%
    (the path for the file being the directory where the dropper file was initially run from)

    Infected machines should be carefully examined, since IRC/Flood droppers are often repackaged with new files, so it is possible that an attacker has installed further hacktools or backdoors.

    If mIRC is already installed on a system, registry entries pointing to the installed product will be redirected to the version dropped by the trojan.

    • Symptoms

    Existence of the files and Registry key detailed above
    Unexpected network traffic

    Method of Infection

    Trojans do not self-replicate. They are spread manually, often under the premise that the executable is something beneficial. Distribution channels include IRC, peer-to-peer networks, newsgroup postings, etc.

    Removal

    All Users:
    Use current engine and DAT files for detection and removal.

    Modifications made to the system Registry and/or INI files for the purposes of hooking system startup, will be successfully removed if cleaning with the recommended engine and DAT combination (or higher).

    Additional Windows ME/XP removal considerations

    Variants

    Variants

      N/A

    All Information

    Overview -

    This is a trojan detection. Unlike viruses, trojans do not self-replicate. They are spread manually, often under the premise that they are beneficial or wanted. The most common installation methods involve system or security exploitation, and unsuspecting users manually executing unknown programs. Distribution channels include email, malicious or hacked web pages, Internet Relay Chat (IRC), peer-to-peer networks, etc.

    Characteristics

    Characteristics -

    This description is intended as a general guide. The specific actions taken are decided by the hacker who creates the dropper file or uses the trojan.

    This is an Internet Relay Chat BOT/DDoS tool. It is dropped by a self-extracting archive which includes a copy of the mIRC client within itself. This allows users who do not run mIRC to become used in a DDoS attack.

    When run, the dropper creates a directory and extracts several files to it. The extracted files are in the following categories:

  • IRC script instruction for various trojan activities.
  • mIRC configuration file.
  • Batch file to perform remote login, remote launches.
  • mIRC executable for remote connection and remote access.
  • HideWindow application to hide the mIRC window.
  • RemoteProcessLaunch application to launch EXEs.

    • The following username/password combinations are used by the batch file (username, password):

  • administrator, administrator
  • administrator, "" (blank)
  • test, test
  • administrator, 123
  • administrator, temp
  • administrator, 1234
  • administrator, pass
  • administrator, password
  • administrator, admin
  • root, root
  • Administrator, Jrjestelmnvalvoja
  • admin, admin

    • The dropper file received by AVERT created a registry entry to run again at Windows startup:

  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
    "NTFix" = %Trojan File%
    (the path for the file being the directory where the dropper file was initially run from)

    Infected machines should be carefully examined, since IRC/Flood droppers are often repackaged with new files, so it is possible that an attacker has installed further hacktools or backdoors.

    If mIRC is already installed on a system, registry entries pointing to the installed product will be redirected to the version dropped by the trojan.

    • Symptoms

    Symptoms -

    Existence of the files and Registry key detailed above
    Unexpected network traffic

    Method of Infection

    Method of Infection -

    Trojans do not self-replicate. They are spread manually, often under the premise that the executable is something beneficial. Distribution channels include IRC, peer-to-peer networks, newsgroup postings, etc.

    Removal -

    Removal -

    All Users:
    Use current engine and DAT files for detection and removal.

    Modifications made to the system Registry and/or INI files for the purposes of hooking system startup, will be successfully removed if cleaning with the recommended engine and DAT combination (or higher).

    Additional Windows ME/XP removal considerations

    Variants

    Variants -

      N/A