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 complicate detection of its presence in the operating system,
blocks execution of the following system utilities:
- Windows Update
- Windows Security Center
Creates and executes the following:
- '%HOMEPATH%\Start Menu\Programs\Startup\rarexsdb.exe'
Executes the following:
- '<SYSTEM32>\svchost.exe'
- '%TEMP%\byjjjqlf.exe'
- '<SYSTEM32>\cmd.exe' /C ""%TEMP%\byjjjqlf.exe""
Injects code into
the following system processes:
- <SYSTEM32>\svchost.exe
Modifies file system:
Creates the following files:
- <LS_APPDATA>\lawhwilb.log
- <LS_APPDATA>\jwaroevi\rarexsdb.exe
- %TEMP%\byjjjqlf.exe
- %ALLUSERSPROFILE%\Application Data\ybfcuwpc.log
Sets the 'hidden' attribute to the following files:
- %HOMEPATH%\Start Menu\Programs\Startup\rarexsdb.exe
Network activity:
Connects to:
- 'iu###xdcys.com':443
- 'bc####ucjive.com':443
- 'rs###lwtan.com':443
- '5.###.190.31':443
- '74.##5.232.51':80
UDP:
- DNS ASK iu###xdcys.com
- DNS ASK bc####ucjive.com
- DNS ASK google.com
- DNS ASK rs###lwtan.com
Miscellaneous:
Searches for the following windows:
- ClassName: 'Indicator' WindowName: ''