Summary
Trojan:W32/Agent.KOG is a trojan that is capable of functioning as a backdoor.
Removal
Based on the settings of your F-Secure security product, it will either move the file to the quarantine where it cannot spread or cause harm, or remove it.
A False Positive is when a file is incorrectly detected as harmful, usually because its code or behavior resembles known harmful programs. A False Positive will usually be fixed in a subsequent database update without any action needed on your part. If you wish, you may also:
Check for the latest database updates
First, check if your F-Secure security program is using the latest updates, then try scanning the file again.
Submit a sample
After checking, if you still believe the file is incorrectly detected, you can submit a sample of it for re-analysis.
Note: If the file was moved to quarantine, you need to collect the file from quarantine before you can submit it.
Exclude a file from further scanning
If you are certain that the file is safe and want to continue using it, you can exclude it from further scanning by the F-Secure security product.
Note: You need administrative rights to change the settings.
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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