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  Buzus.DPBC
Buzus.DPBC is a Trojan. A Trojan is a program that pretends to have a valid use, but in fact modifies the user's computer in malicious way. Trojans do not replicate or spread to other computers.

File Related Changes
It drops the following file(s) on the system:
  • "c:\Windows\System32\runocx.exe"
  • "c:\Windows\System32\rundll20.exe"
  • "c:\Users\Admin\AppData\Roaming\SystemProc\lsass.exe"
  • "c:\Windows\System32\Googleop.exe"
  • "c:\Users\Admin\AppData\Local\Temp\geurge.exe"
  • "c:\tujserrew.bat"

Process Related Changes
It creates the following mutex(es):
  • "Local\_!MSFTHISTORY!_"
  • "SERPv2"
  • "IESQMMUTEX_0_208"
  • "Googleop.exeDm28sf0V@XK$NX8hOu"

It creates the following process(es):
  • C:\Users\Admin\AppData\Roaming\SystemProc\lsass.exe
  • C:\Windows\system32\net1.exe [ C:\Windows\system32\net1 stop \Security Center ]
  • C:\Windows\system32\net.exe [ net.exe stop \Security Center ]
  • C:\Windows\system32\net.exe [ net.exe stop \Windows Firewall/Internet Connection Sharing (ICS) ]
  • C:\Windows\system32\rundll20.exe
  • C:\Windows\system32\runocx.exe
  • C:\Windows\system32\cmd.exe [ cmd /c \C:\tujserrew.bat\ ]
  • C:\Users\Admin\AppData\Local\Temp\geurge.exe

Network Activity
It attempts to connect to the following remote servers:
  • config.installstorm.com:88 (173.230.xxxxxx)
  • www.whatismyip.com:80 (190.93.xxxxxx)

We observed the following DNS query/queries:
  • relay.unicode.org
  • mail.microsoft.com
  • CMU-MX-01.ANDREW.cmu.edu
  • bar.foo
  • mail-in100.apple.com
  • mx1.apple.com
  • ns.unicode.org
  • mxs.apple.com
  • mx.microsoft.com
  • CMU-MX-02.ANDREW.cmu.edu
  • www.whatismyip.com
  • mx1.unicode.org
  • microsoft.com
  • CMU-MX-03.ANDREW.cmu.edu
  • mail-in2.apple.com
  • mail-in5.apple.com
  • apple.com
  • gate.unicode.org
  • mail.apple.com
  • mail.unicode.org
  • mail-in24.apple.com
  • CMU-MX-04.ANDREW.cmu.edu
  • mxs.unicode.org
  • mail-in23.apple.com
  • mx.unicode.org
  • mail-in25.apple.com
  • mail-in21.apple.com
  • mail-in6.apple.com
  • microsoft-com.mail.protection.outlook.com
  • mail-in7.apple.com
  • unicode.org
  • smtp.apple.com
  • cmu.edu
  • mail-in22.apple.com
  • mx.apple.com
  • mail1.unicode.org
  • config.installstorm.com
  • smtp.unicode.org
  • mail-in4.apple.com

The sample sends Spam mails to a number of sources

    Registry Related Changes
    It makes the following registry modifications to ensure infection after system reboot:
    • HKCU\Software\Microsoft\Windows\CurrentVersion\Run\rthdbpl = C:\Users\Admin\AppData\Roaming\SystemProc\lsass.exe
    • HKCU\Software\Microsoft\Windows\CurrentVersion\Run\googleupdaterc5 = C:\Windows\system32\Googleop.exe
    • HKLM\Software\Microsoft\Windows\CurrentVersion\Run\ewrgetuj = C:\Users\Admin\AppData\Local\Temp\geurge.exe


    Relevant Information