Worm/Rbot.1258496 - Worm

See also

Summary

Full description

Statistics

Virus:	Worm/Rbot.1258496
Date discovered:	09/10/2006
Type:	Worm
In the wild:	No
Reported Infections:	Low
Distribution Potential:	Medium
Damage Potential:	Medium
Static file:	Yes
File size:	1.258.496 Bytes
MD5 checksum:	6fd7be146c5449dfdb9a0B97e6775523
VDF version:	6.36.00.81 - Sun, 08 Oct 2006 23:21 (GMT+1)
IVDF version:	6.36.00.97 - Thu, 12 Oct 2006 13:32 (GMT+1)

General Method of propagation:
   • Local network

Aliases:
   • Kaspersky: Backdoor.Win32.Rbot.bll
   • TrendMicro: WORM_RBOT.ATW
   • Sophos: W32/Rbot-FPF
   • VirusBuster: virus Worm.RBot.IFS
   • Bitdefender: Backdoor.Rbot.FHQ

Platforms / OS:
   • Windows 95
   • Windows 98
   • Windows 98 SE
   • Windows NT
   • Windows ME
   • Windows 2000
   • Windows XP

Side effects:
   • Drops a malicious file
   • Records keystrokes
   • Registry modification
   • Makes use of software vulnerability
   • Steals information
   • Third party control

Files It copies itself to the following location:
• %WINDIR%\messengersystem.exe

The following file is created:

– Non malicious file:
• %SYSDIR%\drivers\oreans32.sys

Registry The following registry key is added in order to run the process after reboot:

– HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
   • "Messenger91"="messengersystem.exe"

The following registry keys are added in order to load the service after reboot:

– HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\RunServices
   • "Messenger91"="messengersystem.exe"

The following registry key is added:

– HKCU\Software\Microsoft\OLE
   • "Messenger91"="messengersystem.exe"

Network Infection In order to ensure its propagation the malware attemps to connect to other machines as described below.

It drops copies of itself to the following network shares:
   • IPC$
   • %c$
   • ADMIN$

Exploit:
It makes use of the following Exploit:
– NetDevil backdoor (port 903)

Infection process:
Creates an FTP script on the compromised machine in order to download the malware to the remote location.

Remote execution:
–It attempts to schedule a remote execution of the malware, on the newly infected machine. Therefore it uses the NetScheduleJobAdd function.

IRC To deliver system information and to provide remote control it connects to the following IRC Server:

Server: irc.Brokenirc**********
Port: 6667
Channel: #mad-bots1
Nickname: USA[%Windows version%]%eight-digit random character string%
Password: 5t34lth

– This malware has the ability to collect and send information such as:
    • CPU speed
    • Current user
    • Details about drivers
    • Free disk space
    • Free memory
    • Malware uptime
    • Information about the network
    • Information about running processes
    • Size of memory
    • System directory
    • Windows directory
    • Information about the Windows operating system

– Furthermore it has the ability to perform actions such as:
    • connect to IRC server
    • Launch DDoS ICMP flood
    • Launch DDoS SYN flood
    • Launch DDoS UDP flood
    • Disable network shares
    • Download file
    • Enable network shares
    • Execute file
    • Leave IRC channel
    • Open remote shell
    • Perform network scan
    • Perform port redirection
    • Restart system
    • Updates itself
    • Visit a website

Stealing – A logging routine is started after keystrokes are typed that match one of the following strings:
   • paypal
   • e-gold
   • PayPal
   • StormPay

– It captures:
    • Keystrokes

Miscellaneous Anti debugging
It checks if one of the following files are present:
• \\.\SICE
• \\.\NTICE

If it was successful it displays the following and terminates immediately:

If successful, it terminates immediately.
If this was successful it does not create any files.

File details Runtime packer:
In order to aggravate detection and reduce size of the file it is packed with a runtime packer.

See a brief description here.

Description inserted by Bogdan Iliuta on Fri, 03 Nov 2006 16:10 (GMT+1)
Description updated by Bogdan Iliuta on Mon, 20 Nov 2006 16:59 (GMT+1)

» About Malware
» About Phishing
» Viruses In the Wild

« back