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F-Secure Trojan Information Pages: Rbot.BIC
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Summary
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| RBot represents a large family of backdoors - remote access tools. These tools allow for the contol of a victims' computers from a remote location by sending specific commands via IRC channels. These backdoors can also steal data and spread to computers vulnerable to exploits. |
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Disinfection
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Automatic Disinfection
Usually standalone malware (backdoors, worms, trojans, etc.) is automatically removed by F-Secure Anti-Virus (FSAV) starting from version 5.40. Malware files get automatically renamed by FSAV, so they can not be started any more. In some rare cases, when automatic disinfection is not possible, a user can select disinfection action by him/herself to make FSAV rename or delete an infected file. In some special cases it is recommended to use specific disinfection tools provided by F-Secure. They can be downloaded from our ftp site:
ftp://ftp.f-secure.com/anti-virus/tools/
F-Secure Anti-Virus can be purchased from our webshop or from our authorised distributors. A trial version F-Secure Anti-Virus, limited to 30 days, can be downloaded from our website:
http://www.f-secure.com/download-purchase/
All the latest versions of FSAV can download anti-virus database updates automatically. However, these updates can be also downloaded and installed manually from our web or ftp sites:
http://www.f-secure.com/download-purchase/updates.shtml
Manual Disinfection
To manually disinfect standalone malware (backdoors, worms, trojans, etc.) it's usually enough to delete all infected files from a computer and to restart it. Active malware files are usually locked by operating system so different disinfection approaches are required for different operating systems.
Please note that manual disinfection is a risky process, so it is recommended only for advanced users.
If Windows 95, 98 and ME operating system is used, it is recommended to restart a computer from a bootable system diskette and to delete an infected file from command prompt. For example if a malicious file named ABC.EXE is located in Windows folder, it is usually enough to type the following command at command prompt:
DEL C:\WINDOWS\ABC.EXE
and to press Enter. After that an infected file will be gone. If Windows NT, 2000 or XP is used, a malicious file has to be renamed with a different extension (for example .VIR) and then a system has to be restarted. After restart a renamed malicious file will no longer be active and it can be easily deleted manually.
Malware Disinfection Tools
F-Secure provides disinfection tools for certain malware. These tools can be downloaded from this webpage:
http://www.f-secure.com/download-purchase/tools.shtml
ftp://ftp.f-secure.com/anti-virus/tools/
Windows System Restore Issues
If Windows ME or XP is used, it is recommended to disable System Restore feature of these operating systems to prevent a computer from re-infection by an already removed malware. The fact is that System Restore feature of these operating systems might save an infected file into the special folder and copy it back to a hard drive it every time it's been renamed or deleted by F-Secure Anti-Virus or by a user. Instructions on how to disable System Restore feature are here:
Windows ME:
http://www.f-secure.com/v-descs/sfc_dis.shtml
Windows XP:
http://www.f-secure.com/v-descs/sfc_dis1.shtml
It is recommended to re-enable System Restore after disinfection in order to restore stable system configuration in the future, if any crash or incompatibility issue occurs.
Failed Disinfection
In some cases F-Secure Anti-Virus might not disinfect a system automatically. In this case please visit our Support pages:
http://support.f-secure.com/enu/home/virusproblem/howtoclean/ |
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Detailed Description
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RBot represents a large family of backdoors - remote access tools. These tools allow for the contol of a victims' computers from a remote location by sending specific commands via IRC channels. These backdoors can also steal data and spread to computers vulnerable to exploits.
Upon execution, it creates a copy of itself in the Windows folder and run from this location:
- %windir%\system32\glossary.exe
It will terminate certain services and applications such as the system's firewall, security and antivirus applications.
Rbot.BIC further installs itself to run during system startup by modifying the system registry:
- [HKLM\Software\Microsoft\Windows NT\CurrentVersion\Winlogon]
Shell=explorer.exe %windir%\system32\glossary.exe - [HKLM\Software\Microsoft\Windows NT\CurrentVersion\Winlogon]
Userinit=%windir%\system32\userinit.exe,%windir%\system32\glossary.exe - [HKLM\Software\Microsoft\Windows NT\CurrentVersion\Winlogon]
Userinit=%windir%\system32\userinit.exe,%windir%\system32\glossary.exe - [HKLM\Software\Microsoft\Windows\CurrentVersion\Run]
RBot v2 with NetAPI exploit traded with billgates I gave my mother Greetz - OG - Bluehell Irc Server=%windir%\system32\glossary.exe
The following IRC server and ports are used by the backdoor:
The backdoor joins the following password-protected IRC channels:
- ##.sec.##
- ##.sec-cashlog.##
- ##.sec-exp.##
- ##.sec-keyl0g.##
A hacker can send commands to the bots on the IRC channel to control the infected computers. Several tasks can be performed, including the following:
- Start an FTP server
- Perform ping, SYN, ICMP and UDP flood
- Get system information including information about OS, network and drives
- Update the backdoor's file from Internet
- Operate backdoor's bot (nick change, join/part channels, etc.)
- Start remote shell (cmd.exe)
- Download and execute files
- Enumerate remote shares
- Scan and exploit computers vulnerable to exploits
- Steal user information and log keyboard and mouse events
- Send copies using different IM applications
- Visit websites
- Patch system files
When spreading, the bot can exploit the following vulnerabilities:
- ASN.1 (MS04-007) ports 80 and 139
- MS SQL (MS02-056) port 1433
- NetpIsRemote (MSO6-040) port 139
- Real VNC port 5800
RBot.BIC disables Windows Firewall and Windows Update, and terminates active security related applications that contains the following strings in their filenames:
- anti
- blackice
- firewall
- f-pro
- lockdown
- mcafee
- nod32
- norton
- reged
- sniff
- spybot
- troja
- viru
- vsmon
- zonea
It uses the following user accounts:
- administrador
- administrateur
- administrator
- to connect to the target machine's hidden shares:
It also tries to brute force its way into the Administrator Group accounts by using the following list of passwords:
- admin
- root
- asdfgh
- server
- 0
- 00
- 000
- 0000
- 00000
- 000000
- 0000000
- 00000000
- 1
- 12
- 123
- 1234
- 12345
- 123456
- 1234567
- 12345678
- 123456789
- secret
- secure
- security
- setup
- shadow
- shit
- sql
- super
- sys
- system
- abc123
- access
- adm
- alpha
- anon
- anonymous
- backdoor
- backup
- beta
- bin
- coffee
- computer
- crew
- database
- debug
- default
- demo
- free
- go
- guest
- hello
- install
- internet
- login
- mail
- manager
- money
- monitor
- network
- new
- newpass
- nick
- nobody
- nopass
- oracle
- pass
- passwd
- password
- poiuytre
- private
- public
- qwerty
- random
- real
- remote
- ruler
- telnet
- temp
- test
- test1
- test2
- visitor
- windows
Once a target Windows machine has successfully been exploited, it will create and execute a Visual Basic Script (VBS) file remotely to download and execute a copy of this malware.
It also spies on the user by logging mouse and keyboard events when a specific window with the following strings is active:
- bank
- Bank
- eBay
- iKobo
- PayPal
- StormPay
- WorldPay
It accepts the following BOT commands:
- cdsfmd
- cmderstop
- disconsdfnect
- httpxcvdos
- httxcvvpstop
- imsxcvpread
- imsxcvtop
- irtycraw
- kehgjylog
- kfgnlobvnad
- kiltryltrqead
- logsdfout
- lxcoxcvg
- masssxcvcan
- openxcvcmd
- rdsfmd
- recosdnsdfnect
- scacxvnstats
- scacxvnstop
- sccxvan
- scxvyxn
- socbnks4
- socsdfsktop
- synsxcvtop
- threddsads
- twist
- ucxvdp
- udpcxvsctop
- updghjate
- uptidsfme
- vifdgsit
- visyjghit2
RBot.BIC is also able to send itself in Instant Messages with the following details:
- filename: photo_.SCr
- message: <= :D:D
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F-Secure Corporation |
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Last Modified: September 01, 2006
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