Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yuaobo' = '%HOMEPATH%\yuaobo.exe /l'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yuaobo' = '%HOMEPATH%\yuaobo.exe /u'
Malicious functions:
To complicate detection of its presence in the operating system,
forces the system hide from view:
- hidden files
Creates and executes the following:
- '%HOMEPATH%\yuaobo.exe'
Executes the following:
- '<SYSTEM32>\route.exe' add 207.46.0.0/16 0.0.0.0
- '<SYSTEM32>\route.exe' add 134.170.0.0/16 0.0.0.0
- '<SYSTEM32>\route.exe' add 5.39.93.201 0.0.0.0
- '<SYSTEM32>\route.exe' add 157.60.0.0/16 0.0.0.0
- '<SYSTEM32>\route.exe' add 91.228.166.0/24 0.0.0.0
- '<SYSTEM32>\route.exe' add 91.228.167.0/24 0.0.0.0
- '<SYSTEM32>\route.exe' add 157.54.0.0/15 0.0.0.0
- '<SYSTEM32>\route.exe' add 72.32.67.100 0.0.0.0
- '<SYSTEM32>\route.exe' add 216.239.38.21 0.0.0.0
- '<SYSTEM32>\route.exe' add 74.125.34.46 0.0.0.0
- '<SYSTEM32>\route.exe' add 216.239.32.21 0.0.0.0
- '<SYSTEM32>\route.exe' add 216.239.36.21 0.0.0.0
- '<SYSTEM32>\route.exe' add 65.52.0.0/14 0.0.0.0
- '<SYSTEM32>\route.exe' add 157.56.0.0/14 0.0.0.0
- '<SYSTEM32>\route.exe' add 216.239.34.21 0.0.0.0
- '<SYSTEM32>\route.exe' add 173.194.72.121 0.0.0.0
Modifies file system :
Creates the following files:
- %HOMEPATH%\4.exe
- %HOMEPATH%\RCX3.tmp
- %HOMEPATH%\RCX4.tmp
- %HOMEPATH%\RCX6.tmp
- %HOMEPATH%\RCX5.tmp
- %HOMEPATH%\RCX2.tmp
- %HOMEPATH%\1.exe
- %HOMEPATH%\yuaobo.exe
- %HOMEPATH%\2.exe
- %HOMEPATH%\3.exe
- %HOMEPATH%\RCX1.tmp
Sets the 'hidden' attribute to the following files:
- %HOMEPATH%\yuaobo.exe
Deletes the following files:
- %HOMEPATH%\4.exe
- %HOMEPATH%\3.exe
- %HOMEPATH%\2.exe
Moves the following files:
- from %HOMEPATH%\RCX4.tmp to %HOMEPATH%\4.exe
- from %HOMEPATH%\RCX5.tmp to %HOMEPATH%\4.exe
- from %HOMEPATH%\RCX6.tmp to %HOMEPATH%\4.exe
- from %HOMEPATH%\RCX1.tmp to %HOMEPATH%\2.exe
- from %HOMEPATH%\RCX2.tmp to %HOMEPATH%\3.exe
- from %HOMEPATH%\RCX3.tmp to %HOMEPATH%\3.exe
Network activity:
Connects to:
- 'ns#.#nsfor1.org':7008
- 'ns#.#nsfor2.com':7008
- 'ns#.#nsfor1.net':7008
- 'ns#.#nsfor0.com':7008
- 'ns#.#nsfor1.com':7008
UDP:
- DNS ASK ns#.#nsfor1.org
- DNS ASK ns#.#nsfor2.com
- DNS ASK ns#.#nsfor.net
- DNS ASK ns#.#nsfor0.com
- DNS ASK ns#.#nsfor1.com
- DNS ASK ns#.#nsfor1.net
Miscellaneous:
Searches for the following windows:
- ClassName: 'Indicator' WindowName: ''
