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HackTool:WinNT/Tcpz.A
Detected by Microsoft Defender Antivirus
Aliases: Win-Trojan/Rootkit.11656 (AhnLab) Worm.Win32.AutoRun.ezt (Kaspersky) Win32/TCPZ.A (ESET) Win32/TCPZ.A (CA) Hacktool.Rootkit (Symantec) HKTL_TCPAGENT (Trend Micro)
Summary
HackTool:WinNT/Tcpz.A is a device driver that patches the Windows TCP/IP stack device driver to modify the concurrent TCP connection attempts limit.
Manual removal is not recommended for this threat. To detect and remove this threat and other malicious software that may have been installed, run a full-system scan with an up-to-date antivirus product such as the Microsoft Safety Scanner (http://go.microsoft.com/fwlink/?LinkId=212742). For more information, see http://www.microsoft.com/protect/computer/viruses/vista.mspx.