Trojan:W32/Agent.KOG

Threat description

Details

Category: Malware
Type: Trojan
Platform: W32

Summary

Trojan:W32/Agent.KOG is a trojan that is capable of functioning as a backdoor.



Removal

Automatic action

Depending on the settings of your F-Secure security product, it will either automatically delete, quarantine or rename the suspect file, or ask you for a desired action.

More scanning & removal options

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Technical Details

Once installed on a machine, Agent.KOG allows remote attackers to connect to the infected machine and steal information from it.The trojan itself is a Windows DLL component may be dropped on the system as part of the payload of another malware. Installation on execution, the DLL component is installed as a Windows service. To do so, the following registry keys are created:

  • [HKLM\SYSTEM\CurrentControlSet\Services\RaS{4 random characters}] "ErrorControl" = dword:00000004 "Start" = dword:00000004 "ImagePath" = "%systemroot%\system32\svchost.exe -k netsvcs" "ObjectName" = "LocalSystem"

It aslo creates the following subkeys:

  • [HKLM\SYSTEM\CurrentControlSet\Services\RaS{4 random characters}\Security]
  • [HKLM\SYSTEM\CurrentControlSet\Services\RaS{4 random characters}\Parameters]

In addition, it also modifies the registry data "netsvcs" in the existing svchost service:

  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\SvcHost\"netsvcs"

to function as a launchpoint for the trojan backdoor.

Activity

Once installed, the DLL component uses the Windows socket to send data from the infected machine to an external server, as well as potentially receiving data/commands from the remote attacker.






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