Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon] 'Userinit' = '<SYSTEM32>\userinit.exe,,<LS_APPDATA>\jwaroevi\rarexsdb.exe'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'RarExsdb' = '<LS_APPDATA>\jwaroevi\rarexsdb.exe'
Creates or modifies the following files:
- %HOMEPATH%\Start Menu\Programs\Startup\rarexsdb.exe
Malicious functions:
To bypass firewall, removes or modifies the following registry keys:
- [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile] 'DisableNotifications' = '00000001'
- [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile] 'DoNotAllowExceptions' = '00000000'
- [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile] 'EnableFirewall' = '00000000'
To complicate detection of its presence in the operating system,
blocks execution of the following system utilities:
- Windows Update
- Windows Security Center
blocks the following features:
- User Account Control (UAC)
- Windows Security Center
Creates and executes the following:
- '%TEMP%\byjjjqlf.exe'
Executes the following:
- '<SYSTEM32>\svchost.exe'
Injects code into
the following system processes:
- <SYSTEM32>\svchost.exe
Modifies file system:
Creates the following files:
- %ALLUSERSPROFILE%\Application Data\ybfcuwpc.log
- <LS_APPDATA>\lawhwilb.log
- <LS_APPDATA>\jwaroevi\rarexsdb.exe
- %TEMP%\byjjjqlf.exe
- %TEMP%\ifqydaby.exe
Sets the 'hidden' attribute to the following files:
- %HOMEPATH%\Start Menu\Programs\Startup\rarexsdb.exe
Network activity:
Connects to:
- 'j7#####hstwr61ki.com':443
- '74.##5.232.51':80
UDP:
- DNS ASK iq#####whddcbrglqld.com
- DNS ASK hx#####beflnpwqs.com
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- DNS ASK hx###lgkdw.com
- DNS ASK rb####ybddfnbtk.com
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- DNS ASK sp###gvk.com
- DNS ASK bing.com
- DNS ASK kq####cptlrbjot.com
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- DNS ASK hk#####fcyotykfko.com
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- DNS ASK jr####atqmqh.com
- DNS ASK hp####vguvywdcb.com
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- DNS ASK xf#####jclptdgdsug.com
- DNS ASK sx####ryoqts.com
- DNS ASK cp#####hujfhrerb.com
- DNS ASK oc###mne.com
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- DNS ASK hv###fytcx.com
- DNS ASK google.com
- DNS ASK j7#####hstwr61ki.com
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- DNS ASK ac###yrasn.com
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- DNS ASK bi#####dybjrgwodpb.com
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- DNS ASK rx#####gdeimlrbl.com
- DNS ASK gs###fendh.com
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- DNS ASK rq###xlm.com
- DNS ASK cc####xvtfve.com
- DNS ASK da#####vujrsmjkbkdd.com
- DNS ASK vv#####wxaikfrqjw.com
