Technical Information
Malicious functions
Executes the following
- '%WINDIR%\syswow64\taskkill.exe' /f /im chrome.exe
- '%WINDIR%\syswow64\taskkill.exe' /f /im opera.exe
Searches for windows to
detect analytical utilities:
- ClassName: 'OLLYDBG', WindowName: ''
- ClassName: 'GBDYLLO', WindowName: ''
- ClassName: 'pediy06', WindowName: ''
- ClassName: 'FilemonClass', WindowName: ''
- ClassName: '', WindowName: 'File Monitor - Sysinternals: www.sysinternals.com'
- ClassName: 'PROCMON_WINDOW_CLASS', WindowName: ''
- ClassName: '', WindowName: 'Process Monitor - Sysinternals: www.sysinternals.com'
- ClassName: 'RegmonClass', WindowName: ''
- ClassName: '', WindowName: 'Registry Monitor - Sysinternals: www.sysinternals.com'
Modifies file system
Creates the following files
- %TEMP%\nsk4a49.tmp\uac.dll
- %ProgramFiles(x86)%\cryptoss\crypt\1.exe
- %ProgramFiles(x86)%\cryptoss\crypt\2.exe
- %ProgramFiles(x86)%\cryptoss\crypt\3.exe
- %APPDATA%\tgrfet4tgrf.exe
- %APPDATA%\tgrfe4w3e.exe
- %LOCALAPPDATA%\cookies.sqlite1572896069244-shm
Deletes the following files
- %LOCALAPPDATA%\cookies.sqlite1572896069244-shm
- %APPDATA%\tgrfe4w3e.exe
Network activity
TCP
HTTP GET requests
- http://ri##1.ug/exe/starticon.exe
- http://do##.####n7a57a5a743894a0e.club/5.exe
UDP
- DNS ASK ip###ger.org
- DNS ASK ri##1.ug
- DNS ASK do##.####n7a57a5a743894a0e.club
Miscellaneous
Searches for the following windows
- ClassName: '18467-41' WindowName: ''
- ClassName: 'AutoHotkey' WindowName: '%ProgramFiles(x86)%\Cryptoss\Crypt\2.exe'
Creates and executes the following
- '%ProgramFiles(x86)%\cryptoss\crypt\2.exe'
- '%APPDATA%\tgrfet4tgrf.exe'
- '%APPDATA%\tgrfe4w3e.exe'
- '%ProgramFiles(x86)%\cryptoss\crypt\3.exe'
- '%APPDATA%\tgrfet4tgrf.exe' --Admin IsNotAutoStart IsNotTask
- '%WINDIR%\syswow64\cmd.exe' /c ping 127.0.0.1 -n 3 & del "%APPDATA%\tgrfe4w3e.exe"' (with hidden window)
- '%WINDIR%\syswow64\cmd.exe' /c taskkill /f /im chrome.exe' (with hidden window)
- '%WINDIR%\syswow64\cmd.exe' /c taskkill /f /im opera.exe' (with hidden window)
- '%WINDIR%\syswow64\icacls.exe' "%LOCALAPPDATA%\ed7b4e6c-f1c1-4a35-86ab-5887610fdde8" /deny *S-1-1-0:(OI)(CI)(DE,DC)' (with hidden window)
Executes the following
- '%WINDIR%\syswow64\rundll32.exe' 001 install5
- '%WINDIR%\syswow64\rundll32.exe' 002 install5
- '%WINDIR%\syswow64\cmd.exe' /c ping 127.0.0.1 -n 3 & del "%APPDATA%\tgrfe4w3e.exe"
- '%WINDIR%\syswow64\cmd.exe' /c taskkill /f /im chrome.exe
- '%WINDIR%\syswow64\cmd.exe' /c taskkill /f /im opera.exe
- '%WINDIR%\syswow64\ping.exe' 127.0.0.1 -n 3
- '%WINDIR%\syswow64\icacls.exe' "%LOCALAPPDATA%\ed7b4e6c-f1c1-4a35-86ab-5887610fdde8" /deny *S-1-1-0:(OI)(CI)(DE,DC)
