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msvcrt.dll Relive.dll msvcrt.bak病毒变种解决方案 | |||
2007-7-18 8:47:31 文/海色の月 出处:C.I.S.R.T | |||
病毒别名:Trojan.PSW.Win32.Agent.qs(瑞星) 病毒大小:23,087 字节 加壳方式:PE_Patch.UPX UPX 样本MD5:3d4d01638f3e206c7bbbde769a3f2182 样本SHA1:8d6d71216a588155554226efe84eed2c8011c38a 发现时间:2007.7.10 更新时间:2007.7.17 关联病毒: 传播方式:通过恶意网页传播,其它木马或病毒下载 技术分析 ========== 变种: Relive.dll msvcrt.dll木马的手动清除 木马运行后复制自身到: %ProgramFiles%\Internet Explorer\msvcrt.bak 释放dll注入Explorer.exe进程: %ProgramFiles%\Internet Explorer\msvcrt.dll 同时还创建msvcrt.dll的副本,作为BHO启动: %ProgramFiles%\Common Files\Relive.dll 创建ShellExecuteHooks启动方式: [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\ShellExecuteHooks] "{0FAD2E16-C8EF-5AC1-1E6A-AE3FD8EF56B3}"="" [HKEY_CLASSES_ROOT\CLSID\{0FAD2E16-C8EF-5AC1-1E6A-AE3FD8EF56B3}\InProcServer32] @="%ProgramFiles%\Internet Explorer\msvcrt.dll" 创建浏览器加载项(BHO): [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{D3626E66-B13B-C628-ACDF-BDABCFA265E1}] [HKEY_CLASSES_ROOT\CLSID\{D3626E66-B13B-C628-ACDF-BDABCFA265E1}\InProcServer32] @="%ProgramFiles%\Common Files\Relive.dll" 删除注册表ShellExecuteHooks位置下其它木马创建的信息: [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\ShellExecuteHooks] {B8A170A8-7AD3-4678-B2FE-F2D7381CC1B5} {131AB311-16F1-F13B-1E43-11A24B51AFD1} {274B93C2-A6DF-485F-8576-AB0653134A76} {1496D5ED-7A09-46D0-8C92-B8E71A4304DF} {0CB68AD9-FF66-3E63-636B-B693E62F6236} {09B68AD9-FF66-3E63-636B-B693E62F6236} {754FB7D8-B8FE-4810-B363-A788CD060F1F} {A6011F8F-A7F8-49AA-9ADA-49127D43138F} {06A68AD9-FF56-6E73-937B-B893E72F6226} {01F6EB6F-AB5C-1FDD-6E5B-FB6EE3CC6CD6} {06E6B6B6-BE3C-6E23-6C8E-B833E2CE63B8} {BC0ACA58-6A6F-51DA-9EFE-9D20F4F621BA} {AEB6717E-7E19-11d0-97EE-00C04FD91972} {99F1D023-7CEB-4586-80F7-BB1A98DB7602} {FEB94F5A-69F3-4645-8C2B-9E71D270AF2E} {923509F1-45CB-4EC0-BDE0-1DED35B8FD60} {42A612A4-4334-4424-4234-42261A31A236} {DE35052A-9E37-4827-A1EC-79BF400D27A4} {DD7D4640-4464-48C0-82FD-21338366D2D2} *{AEB6717E-7E19-11d0-97EE-00C04FD91972} 删除目录: %temp%\smss.exe %temp%\csrss.exe %temp%\svchost32.exe %temp%\svchost.exe %temp%\conime.exe %temp%\ctfmon.exe %temp%\mmc.exe %temp%\services.exe %temp%\IEXPLORE.EXE %temp%\stpgldk.exe %temp%\srogm.exe %temp%\spglsdr.exe %temp%\copypfh.exe %temp%\okfile.exe %temp%\fyso.exe %temp%\jtso.exe %temp%\mhso.exe %temp%\wdso.exe %temp%\wgso.exe %temp%\wlso.exe %temp%\wmso.exe %temp%\woso.exe %temp%\ztso.exe %temp%\daso.exe %temp%\tlso.exe %temp%\rxso.exe %temp%\fyso0.dll %temp%\jtso0.dll %temp%\mhso0.dll %temp%\qjso0.dll %temp%\wdso0.dll %temp%\wgso0.dll %temp%\wlso0.dll %temp%\wmso0.dll %temp%\woso0.dll %temp%\ztso0.dll %temp%\tlso0.dll %temp%\daso0.dll %temp%\rxso0.dll %ProgramFiles%\Internet Explorer\msvcrt.dll %ProgramFiles%\Internet Explorer\msvcrt.bak %ProgramFiles%\Internet Explorer\msvcrt.ebk 删除文件: %System%\drivers\etc\hosts 尝试访问网络下载其它木马程序保存到%temp%目录并运行,之前的操作即是为这些木马的种植做准备。 通过注册表找到反病毒软件的安装目录: HKEY_LOCAL_MACHINE\SOFTWARE\rising\Rav\installpath HKEY_LOCAL_MACHINE\SOFTWARE\Kingsoft\AntiVirus\ProgramPath HKEY_LOCAL_MACHINE\SOFTWARE\JiangMin HKEY_LOCAL_MACHINE\SOFTWARE\KasperskyLab\InstalledProducts\Kaspersky Anti-Virus Personal HKEY_LOCAL_MACHINE\SOFTWARE\KasperskyLab\SetupFolders HKEY_LOCAL_MACHINE\SOFTWARE\Network Associates\TVD\Shared Components\Framework HKEY_LOCAL_MACHINE\SOFTWARE\Symantec\SharedUsage HKEY_LOCAL_MACHINE\SOFTWARE\Eset\Nod\CurrentVersion\Info 在反病毒软件安装目录下创建名为ws2_32.dll目录影响反病毒软件的正常运行,并在ws2_32.dll目录中创建不规则命名!O!0.的目录使得ws2_32.dll目录不能被删除。比如: C:\KAV2007\ws2_32.dll\!O!0. C:\Program Files\Rising\Rav\ws2_32.dll\!O!0. 清除步骤 ========== 1. 删除木马创建的注册表信息(注册表进入步骤:开始菜单-运行-输入“regedit”): [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\ShellExecuteHooks] "{0FAD2E16-C8EF-5AC1-1E6A-AE3FD8EF56B3}" [HKEY_CLASSES_ROOT\CLSID\{0FAD2E16-C8EF-5AC1-1E6A-AE3FD8EF56B3}] [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{D3626E66-B13B-C628-ACDF-BDABCFA265E1}] [HKEY_CLASSES_ROOT\CLSID\{D3626E66-B13B-C628-ACDF-BDABCFA265E1}] 2. 重新启动计算机 3. 删除木马相关文件(如遇提示无法删除文件,到down.45its.com下载费尔木马强制删除器工具进行强制删除): %ProgramFiles%\Internet Explorer\msvcrt.bak %ProgramFiles%\Internet Explorer\msvcrt.dll %ProgramFiles%\Common Files\Relive.dll 4. 删除反病毒软件安装目录下的ws2_32.dll目录,可以使用rd /s命令,比如: rd /s C:\KAV2007\ws2_32.dll rd /s "C:\Program Files\Rising\Rav\ws2_32.dll" 5. 创建%System%\drivers\etc\hosts文件: 内容为一行即可: 127.0.0.1 localhost
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