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Win32.HLLW.Bobik.18
Added to the Dr.Web virus database:
2014-05-07
Virus description added:
2018-03-15
Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
[<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'gWt' = '<SYSTEM32>\bvwjdzpgsnu.exe'
Malicious functions:
To bypass firewall, removes or modifies the following registry keys:
[<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile] 'EnableFirewall' = '00000000'
[<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile] 'DoNotAllowExceptions' = '00000000'
[<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\DomainProfile] 'EnableFirewall' = '00000000'
[<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\DomainProfile] 'DoNotAllowExceptions' = '00000000'
To complicate detection of its presence in the operating system,
blocks the following features:
System File Checker (SFC)
Windows Security Center
Executes the following:
'<SYSTEM32>\netsh.exe' firewall set opmode mode=disable profile=all
Hides the following processes:
Modifies file system:
Creates the following files:
<SYSTEM32>\bvwjdzpgsnu.exe
Sets the 'hidden' attribute to the following files:
Moves the following files:
from <Full path to file> to %TEMP%\1.tmp
Substitutes the following files:
Modifies the HOSTS file.
Network activity:
Connects to:
'jd####y.dynserv.com':80
'ma#####04.mx.aol.com':25
'wy####ow.afraid.org':80
'fc####ydw.yi.org':80
'nt###zi.hn.org':80
'yu####z.1dumb.com':80
'94.##0.191.201':25
'mx#.#otmail.com':25
'mc###i.3-a.net':80
'ma#####01.mx.aol.com':25
TCP:
HTTP GET requests:
http://wy####ow.afraid.org/reg?u=##########################################################
http://nt###zi.hn.org/reg?u=##########################################################
http://fc####ydw.yi.org/reg?u=##########################################################
http://yu####z.1dumb.com/reg?u=##########################################################
http://mc###i.3-a.net/reg?u=##########################################################
http://jd####y.dynserv.com/reg?u=##########################################################
UDP:
DNS ASK jd####y.dynserv.com
DNS ASK ma#####04.mx.aol.com
DNS ASK wy####ow.afraid.org
DNS ASK fc####ydw.yi.org
DNS ASK nt###zi.hn.org
DNS ASK mc###i.3-a.net
DNS ASK yu####z.1dumb.com
DNS ASK mx#.mail.ru
DNS ASK ma##.#arthlink.net
DNS ASK ma#####01.mx.aol.com
DNS ASK mx#.#otmail.com
Miscellaneous:
Executes the following:
'<SYSTEM32>\sc.exe' config SharedAccess start= disabled
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