high
Summary
Summary
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| How it spreads |
|
|---|---|
| Affected operating systems | Windows |
| Characteristics |
|
| Protection available since | 22 June 2005 11:40:24 (GMT) |
| Detected by | All Sophos products |
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Action
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W32/Rbot-AGE is a worm and IRC backdoor Trojan for the Windows platform.
W32/Rbot-AGE spreads to other network computers by exploiting the buffer overflow vulnerabilites LSASS (MS04-011), RPC-DCOM (MS04-012) and MSSQL (MS02-039) and by copying itself to network shares protected by weak passwords.
W32/Rbot-AGE runs continuously in the background, providing a backdoor server which allows a remote intruder to gain access and control over the computer via IRC channels.
W32/Rbot-AGE includes functionality to access the internet and communicate with a remote server via HTTP.
When first run W32/Rbot-AGE copies itself to <Windows>\msdevnull.exe and creates the file <System>\msriv1.sys.
The file msriv1.sys is detected as Troj/Rootkit-W.
The file msdevnull.exe is registered as a new system driver service named "msdevnull", with a display name of "Microsoft Null Development Monitor" and a startup type of automatic, so that it is started automatically during system startup. Registry entries are created under:
HKLM\SYSTEM\CurrentControlSet\Services\msdevnull\
The file msriv1.sys is registered as a new system driver service named "msriv1", with a display name of "msriv1". Registry entries are created under:
HKLM\SYSTEM\CurrentControlSet\Services\msriv1\
W32/Rbot-AGE sets the following registry entries, disabling the automatic startup of other software:
HKLM\SYSTEM\CurrentControlSet\Services\Messenger
Start
4
HKLM\SYSTEM\CurrentControlSet\Services\RemoteRegistry
Start
4
HKLM\SYSTEM\CurrentControlSet\Services\TlntSvr
Start
4
Registry entries are set as follows:
HKLM\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate
DoNotAllowXPSP2
1
HKLM\SOFTWARE\Microsoft\Ole
EnableDCOM
N
HKLM\SYSTEM\CurrentControlSet\Control\Lsa
restrictanonymous
1
HKLM\SYSTEM\CurrentControlSet\Hardware Profiles\0001\Software\Microsoft\windows\CurrentVersion\Internet Settings
ProxyEnable
1
HKLM\SYSTEM\CurrentControlSet\Hardware Profiles\Current\Software\Microsoft\windows\CurrentVersion\Internet Settings
ProxyEnable
1
Registry entries are also created under:
HKLM\SOFTWARE\Microsoft\Security Center\
HKLM\SOFTWARE\Policies\Microsoft\WindowsFirewall\DomainProfile\
HKLM\SOFTWARE\Policies\Microsoft\WindowsFirewall\StandardProfile\
The following patches for the operating system vulnerabilities exploited by W32/Rbot-AGE can be obtained from the Microsoft website:
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