Technical Information
To ensure autorun and distribution
Modifies the following registry keys
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'Audio HD Driver' = '%TEMP%\ZhHCH1rhcKV.exe'
- [<HKLM>\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Run] 'Audio HD Driver' = '%TEMP%\ZhHCH1rhcKV.exe'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run] 'Audio HD Driver' = '%APPDATA%\ZhHCH1rhcKV.exe'
- [<HKLM>\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run] 'Policies' = '%ProgramFiles(x86)%\Windows\explorer.exe'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run] 'Policies' = '%ProgramFiles(x86)%\Windows\explorer.exe'
- [<HKLM>\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Run] 'HKLM' = '%ProgramFiles(x86)%\Windows\explorer.exe'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'HKCU' = '%ProgramFiles(x86)%\Windows\explorer.exe'
- [<HKLM>\Software\Wow6432Node\Microsoft\Active Setup\Installed Components\{X1LEEGU2-ICL8-71P0-468T-6S713A37N83N}] 'StubPath' = '%ProgramFiles(x86)%\Windows\explorer.exe Restart'
Malicious functions
To complicate detection of its presence in the operating system,
forces the system hide from view:
- hidden files
blocks the following features:
- User Account Control (UAC)
Injects code into
the following system processes:
- %WINDIR%\twunk_32.exe
Modifies file system
Creates the following files
- %TEMP%\zhhch1rhckv.exe
- %APPDATA%\zhhch1rhckv.exe
- %ProgramFiles(x86)%\windows\explorer.exe
- %TEMP%\xx--xx--xx.txt
- %TEMP%\xxx.xxx
- %TEMP%\uuu.uuu
- %TEMP%\twain.log
Sets the 'hidden' attribute to the following files
- %TEMP%\zhhch1rhckv.exe
- %APPDATA%\zhhch1rhckv.exe
Deletes the following files
- %TEMP%\xx--xx--xx.txt
- %TEMP%\uuu.uuu
- %TEMP%\xxx.xxx
Substitutes the following files
- %TEMP%\uuu.uuu
- %TEMP%\xxx.xxx
Network activity
UDP
- DNS ASK ar#####ch536.no-ip.biz
Miscellaneous
Searches for the following windows
- ClassName: 'shell_traywnd' WindowName: ''
Creates and executes the following
- '%ProgramFiles(x86)%\windows\explorer.exe'
Executes the following
- '%WINDIR%\twunk_32.exe'
