Win32: Mutant-AG Trojan / Rootkit

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Uloguj se preko Facebooka da bi skinuo fajl:

Na jednu masinu je stigao trojan putem USB flash diska... dodao je autorun na flash drive, i dupli klik inicira VB skripticu koja sa neta dovlaci ostatak rootkit-a.

Avast je uspeo delimicno da resi stvar, ali je trojanac uspeo da napravi stetu tako sto je par dana slao enormne kolicine spam-a ka svetu, dakle masina je bila hijack-ovana...

HT log:

https://www.mycity.rs/must-login.png

Sumnjiv proces iexplore.exe i to 4x se pojavljuje... naravno IE nije startovan niti se koristi:


Svchost je poceo da luduje, od 20-ak mb punio se do 400... cpu usage 100%...


Posto Avast nije uspeo da se izbori sa ovim cudom, instalirana je Avira AntiVir Personal koja je nasla jos nekoliko exploita/malware-a kao i Rootkit koji nikako ne moze da se obrise (Access denied):



Samo je taj Winnt32.dll ostao u system32 folderu, ni iz safe mode-a, ni sa CMD-a ne moze da se obrise...


Testirane su i druge masine u mrezi, sve je cisto osim na jednoj sumniv proces u poslednjoj liniji loga:
https://www.mycity.rs/must-login.png

Eto, ispade ovo studija slucaja

Inace za ovaj Mutant-AG / Agent-VGV trojanac/crv tesko je naci opis na netu, koliko sam uspeo da nadjem pojavio se tek sada u maju.. znaci sveze celjade dodje i u nase krajeve

====================

Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 22:05:25, on 31.05.2008
Platform: Windows XP SP2 (WinNT 5.01.2600)
MSIE: Internet Explorer v7.00 (7.00.6000.16640)
Boot mode: Normal

Running processes:
C:\WINDOWS\System32\smss.exe
C:\WINDOWS\system32\winlogon.exe
C:\WINDOWS\system32\services.exe
C:\WINDOWS\system32\lsass.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\System32\svchost.exe
C:\Program Files\Alwil Software\Avast4\aswUpdSv.exe
C:\Program Files\Alwil Software\Avast4\ashServ.exe
C:\WINDOWS\Explorer.EXE
C:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
C:\Program Files\Adobe\Reader 8.0\Reader\Reader_sl.exe
C:\WINDOWS\system32\spoolsv.exe
C:\WINDOWS\system32\ctfmon.exe
C:\Program Files\Common Files\Microsoft Shared\VS7DEBUG\MDM.EXE
C:\WINDOWS\System32\svchost.exe
C:\Program Files\Alwil Software\Avast4\ashMaiSv.exe
C:\Program Files\Alwil Software\Avast4\ashWebSv.exe
C:\WINDOWS\system32\wuauclt.exe
C:\Documents and Settings\Misa\Desktop\SECURIT\xclean_micro.exe
C:\Documents and Settings\Misa\Desktop\SECURIT\HiJackThis\HijackThis.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.b92.net/indexs.phtml
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://go.microsoft.com/fwlink/?LinkId=69157
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Search_URL = http://go.microsoft.com/fwlink/?LinkId=54896
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Page = http://go.microsoft.com/fwlink/?LinkId=54896
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page = http://go.microsoft.com/fwlink/?LinkId=69157
O2 - BHO: Adobe PDF Reader Link Helper - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Program Files\Common Files\Adobe\Acrobat\ActiveX\AcroIEHelper.dll
O4 - HKLM\..\Run: [avast!] C:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
O4 - HKLM\..\Run: [C-Media Mixer] Mixer.exe /startup
O4 - HKLM\..\Run: [Adobe Reader Speed Launcher] "C:\Program Files\Adobe\Reader 8.0\Reader\Reader_sl.exe"
O4 - HKLM\..\Run: [NeroCheck] C:\WINDOWS\system32\NeroCheck.exe
O4 - HKLM\..\Run: [KernelFaultCheck] %systemroot%\system32\dumprep 0 -k
O4 - HKCU\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\ctfmon.exe
O4 - HKUS\S-1-5-19\..\Run: [CTFMON.EXE] C:\WINDOWS\System32\CTFMON.EXE (User 'LOCAL SERVICE')
O4 - HKUS\S-1-5-20\..\Run: [CTFMON.EXE] C:\WINDOWS\System32\CTFMON.EXE (User 'NETWORK SERVICE')
O4 - HKUS\S-1-5-18\..\Run: [CTFMON.EXE] C:\WINDOWS\System32\CTFMON.EXE (User 'SYSTEM')
O4 - HKUS\.DEFAULT\..\Run: [CTFMON.EXE] C:\WINDOWS\System32\CTFMON.EXE (User 'Default user')
O8 - Extra context menu item: E&xport to Microsoft Excel - res://C:\PROGRA~1\MICROS~2\OFFICE11\EXCEL.EXE/3000
O9 - Extra button: Research - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~1\MICROS~2\OFFICE11\REFIEBAR.DLL
O9 - Extra button: Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\Program Files\Messenger\msmsgs.exe
O9 - Extra 'Tools' menuitem: Windows Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\Program Files\Messenger\msmsgs.exe
O16 - DPF: {D27CDB6E-AE6D-11CF-96B8-444553540000} (Shockwave Flash Object) - http://fpdownload2.macromedia.com/get/shockwave/cabs/flash/swflash.cab
O20 - Winlogon Notify: WinCtrl32 - C:\WINDOWS\SYSTEM32\WinCtrl32.dll
O20 - Winlogon Notify: WinNt32 - C:\WINDOWS\SYSTEM32\WinNt32.dll
O23 - Service: avast! iAVS4 Control Service (aswUpdSv) - ALWIL Software - C:\Program Files\Alwil Software\Avast4\aswUpdSv.exe
O23 - Service: avast! Antivirus - ALWIL Software - C:\Program Files\Alwil Software\Avast4\ashServ.exe
O23 - Service: avast! Mail Scanner - ALWIL Software - C:\Program Files\Alwil Software\Avast4\ashMaiSv.exe
O23 - Service: avast! Web Scanner - ALWIL Software - C:\Program Files\Alwil Software\Avast4\ashWebSv.exe
O23 - Service: Pml Driver HPZ12 - HP - C:\WINDOWS\system32\hpzipm12.exe

--
End of file - 3890 bytes

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Skini ComboFix sa jedne od sledecih adresa na Desktop:
http://download.bleepingcomputer.com/sUBs/ComboFix.exe
http://www.forospyware.com/sUBs/ComboFix.exe
http://subs.geekstogo.com/ComboFix.exe

Startuj ga i ne diraj prozor programa dok skenira.
Sledi uputstva na ekranu. Kada zavrsi pojavice se log (C:\ComboFix.txt) koji ces nam ovde iskopirati.