Antivirus and Security Software from Sophos

Sophos blogs

W32/Rbot-ATS

Aliases
  • Packed.Win32.CryptExe
  • W32.Spybot.Worm
Category
Type
What to do
Prevalence low high

Summary

 
How it spreads
  • Network shares
Affected operating systems Windows
Characteristics
  • Installs itself in the registry
Protection available since 27 October 2005 14:02:51 (GMT)
Detected by All Sophos products
Download Free virus scan
Download the Threat Detection Test
  • Free virus, spyware, and adware scan
  • Test your existing anti-virus protection
  • Find threats your anti-virus missed

Action

More Information

W32/Rbot-ATS is a worm for the Windows platform.

W32/Rbot-ATS may spread by copying itself to network shares with no passwords or by exploiting any of the following vulnerabilities: LSASS (MS04-011), RPC-DCOM (MS04-012), WKS (MS03-049), WebDav (MS03-007), IIS5SSL (MS04-011), UPNP (MS01-059), Veritas (CAN-2004-1172), Dameware (CAN-2003-1030), PNP (MS05-039), ASN.1 (MS04-007).

When first run W32/Rbot-ATS copies itself to <System>\lsasser.exe.

The following registry entries are created to run lsasser.exe on startup:

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
msupdater25
lsasser.exe

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\RunServices
msupdater25
lsasser.exe

Registry entries are set as follows:

HKCU\Software\Microsoft\OLE
msupdater25
lsasser.exe

HKLM\SOFTWARE\Microsoft\Ole
EnableDCOM
N

HKLM\SYSTEM\CurrentControlSet\Control\Lsa
restrictanonymous
1

RSS|Atom
Get reports about the latest virus and spyware threats delivered to your computer