Backdoor.Pcclient是一種於2004年7月9日發現的木馬病毒，可以感染Windows 2000, Windows 95, Windows 98, Windows Me, Windows NT, Windows Server 2003, Windows XP等作業系統，被感染後會有記錄鍵盤滑鼠操作，自動重啟，下載檔案，強行關機等行為
基本介紹
- 中文名：Backdoor.Pcclient
- 發現日期：2004年7月9日
- 病毒類型：木馬病毒
- 屬性：計算機病毒
- 感染系統：Windows 2000, Windows 95,等
- 行為：註銷當前帳戶, 強行關機
基本信息,相關信息,
基本信息
Backdoor.Pcclient 病毒剖析
該病毒最初發現日期：2004年7月9日。
病毒類型：木馬病毒。
可以被感染的作業系統: Windows 2000, Windows 95, Windows 98, Windows Me, Windows NT, Windows Server 2003, Windows XP
Backdoor.Pcclient 病毒檔案被運行後會有如下行為:
1. 在system32目錄下創建一個dll檔案.
相關信息
注釋:
· 通過監測, 該病毒在system32目錄下創建的檔案名稱是smss.dll
· 並將下列參數值添加到註冊表啟動項:
"PcClient" = "[path to Trojan]"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
2. 該木馬病毒會嘗試以隨機的連線埠以http套用層協定連線預先定義好的網站, 並將被感染機器的用戶名, CPU型號, 計算機名等信息傳送到連線的主機. 已知的連線網站有:
· saap.meibu.com
· ps7.meibu.com
· net918.dns0755.net
· xjtomb.20cn.com
3. 該木馬病毒可以有下列行為:
· 註銷當前帳戶, 強行關機, 重新啟動你的計算機, 下載和運行更多的檔案,
· 記錄鍵盤滑鼠 行為.
實例公布:
UC2008beta2綠色顯IP顯隱身版被Norton查出有Backdoor Pcclient 病毒. 經過多方及本人的專業手段測試, 這是對UC外掛程式ucplugin.dll內嵌顯隱身技術地封殺. ucplugin.dll動態庫檔案為uc.exe檔案工作模組, 沒有任何上述後門木馬病毒的行為. uc玩家盡可放心使用 ”uc2008beta2綠色顯IP顯隱身去聊天室限制版本”.
以下為Norton公司的安全建議. 非常實用, 供有一定專業英語基礎的讀者自行翻譯閱讀:
Symantec Security Response encourages all users and administrators to adhere to the following basic security "best practices":
· Use a firewall to block all incoming connections from the Internet to services that should not be publicly available. By default, you should deny all incoming connections and only allow services you explicitly want to offer to the outside world.
· Enforce a password policy. Complex passwords make it difficult to crack password files on compromised computers. This helps to prevent or limit damage when a computer is compromised.
· Ensure that programs and users of the computer use the lowest level of privileges necessary to complete a task. When prompted for a root or UAC password, ensure that the program asking for administration-level access is a legitimate application.
· Disable AutoPlay to prevent the automatic launching of executable files on network and removable drives, and disconnect the drives when not required. If write access is not required, enable read-only mode if the option is available.
· Turn off file sharing if not needed. If file sharing is required, use ACLs and password protection to limit access. Disable anonymous access to shared folders. Grant access only to user accounts with strong passwords to folders that must be shared.
· Turn off and remove unnecessary services. By default, many operating systems install auxiliary services that are not critical. These services are avenues of attack. If they are removed, threats have less avenues of attack.
· If a threat exploits one or more network services, disable, or block access to, those services until a patch is applied.
· Always keep your patch levels up-to-date, especially on computers that host public services and are accessible through the firewall, such as HTTP, FTP, mail, and DNS services.
· Configure your email server to block or remove email that contains file attachments that are commonly used to spread threats, such as .vbs, .bat, .exe, .pif and .scr files.
· Isolate compromised computers quickly to prevent threats from spreading further. Perform a forensic analysis and restore the computers using trusted media.
· Train employees not to open attachments unless they are expecting them. Also, do not execute software that is downloaded from the Internet unless it has been scanned for viruses. Simply visiting a compromised Web site can cause infection if certain browser vulnerabilities are not patched.
· If Bluetooth is not required for mobile devices, it should be turned off. If you require its use, ensure that the device's visibility is set to "Hidden" so that it cannot be scanned by other Bluetooth devices. If device pairing must be used, ensure that all devices are set to "Unauthorized", requiring authorization for each connection request. Do not accept applications that are unsigned or sent from unknown sources.
· For further information in this document, please refer to the Security Response glossary.
· Reference: http://www.symantec.com/business/security_response/glossary.jsp
