- Threat Encyclopedia
- Malware
- WORM_SDBOT.JAB
Backdoor:Win32/IRCbot.gen!U (Microsoft), Backdoor.Win32.IRCBot.gen (Kaspersky), Bloodhound.Exploit.8 (Symantec), Exploit-DcomRpc.gen (McAfee), Mal/IRCBot-C (Sophos), Trojan.Win32.Ircbot!cobra (Sunbelt), W32/IRCBot.C!tr.bdr (Fortinet); Virus.Win32.IRCBot (Ikarus), Win32/AutoRun.IRCBot.FC (Nod32), Trojan W32/Ircbot.BFOH (Norman),
Windows 2000, Windows XP, Windows Server 2003
Propagates via network shares, Propagates via peer-to-peer networks, Propagates via removable drives, Downloaded from the Internet
This worm arrives by connecting affected removable drives to a system. It arrives via peer-to-peer (P2P) shares. It arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
It drops an AUTORUN.INF file to automatically execute the copies it drops when a user accesses the drives of an affected system. It uses a list of passwords to gain access to password-protected shares.
It joins an Internet Relay Chat (IRC) channel.
65,024 bytes
EXE
Yes
24 Jan 2012
Compromises system security, Terminates processes
Arrival Details
This worm arrives by connecting affected removable drives to a system.
It arrives via peer-to-peer (P2P) shares.
It may arrive via network shares.
It arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
Installation
This worm drops the following copies of itself into the affected system:
(Note: %Application Data% is the current user's Application Data folder, which is usually C:\Windows\Profiles\{user name}\Application Data on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Application Data on Windows NT, and C:\Documents and Settings\{user name}\Local Settings\Application Data on Windows 2000, XP, and Server 2003.. %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003.)
It adds the following mutexes to ensure that only one of its copies runs at any one time:
Autostart Technique
This worm adds the following registry entries to enable its automatic execution at every system startup:
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
SunJavaUpdateSched = "%Application Data%\dnsupdater.exe"
Propagation
This worm drops copies of itself in the following shared folders:
It drops the following copy(ies) of itself in all removable drives:
It drops an AUTORUN.INF file to automatically execute the copies it drops when a user accesses the drives of an affected system.
The said .INF file contains the following strings:
[autorun]
open=autorunme.exe
icon=%SystemRoot%\system32\SHELL32.dll,8
label=USB Drive
action=USB Drive explorer
shellexecute=autorunme.exe
It uses the following list of passwords to gain access to password-protected shares:
Backdoor Routine
This worm connects to any of the following IRC server(s):
It joins any of the following Internet Relay Chat (IRC) channels:
Process Termination
This worm terminates the following processes if found running in the affected system's memory:
NOTES:
This worm drops copies of itself in the following folders used in peer-to-peer networks:
The folder path where it drops copies of itself is obtained by checking the following registry entries:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion
%Program Files& = "{folder path}"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders
Personal = "{folder path}"
It uses the following file names for the copies it drops in the folders mentioned above:
It also searches for all .RAR files in the affected computer and adds a copy of itself all .RAR archives. It adds a copy using any of the following file names:
This worm terminates itself if the user name of the currently logged on user is the same as the following:
9.200
Step 1
For Windows XP and Windows Server 2003 users, before doing any scans, please make sure you disable System Restore to allow full scanning of your computer.
Step 2
Terminate a malware/grayware process
*Note: If the detected process is not displayed in theWindows Task Manager, continue doing the next steps.
Step 3
Delete this registry value
Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.
Step 4
Search and delete AUTORUN.INF files created by WORM_SDBOT.JAB that contain these strings
Step 5
Scan your computer with your Trend Micro product to delete files detected as WORM_SDBOT.JAB. If the detected files have already been cleaned, deleted, or quarantined by your Trend Micro product, no further step is required. You may opt to simply delete the quarantined files. Please check this Knowledge Base page for more information.