Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [\REGISTRY\USER\S-1-5-20\Software\Microsoft\Windows\CurrentVersion\Run] 'Microsoft' = 'rundll32.exe "<LS_APPDATA>\VMware\Microsoft\czulo.dll",CreateInstance'
- [\REGISTRY\USER\S-1-5-19\Software\Microsoft\Windows\CurrentVersion\Run] 'Microsoft' = 'rundll32.exe "<LS_APPDATA>\VMware\Microsoft\czulo.dll",CreateInstance'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'Microsoft' = 'rundll32.exe "<LS_APPDATA>\VMware\Microsoft\czulo.dll",CreateInstance'
Malicious functions:
Executes the following:
- <SYSTEM32>\rundll32.exe "<LS_APPDATA>\VMware\Microsoft\czulo.dll",CreateInstance
- <SYSTEM32>\rundll32.exe "%TEMP%\d60d41ceaefd7a9e33039f9001918d47.tmp\\czulo.dll",CreateInstance
Terminates or attempts to terminate
the following user processes:
- chrome.exe
- firefox.exe
Modifies file system :
Creates the following files:
- <LS_APPDATA>\VMware\Microsoft\czulo.dll
- %APPDATA%\Mozilla\Firefox\Profiles\cwdgt0y8.default\extensions\cjacmycnqj@cjacmycnqj.org.xpi
- %TEMP%\d60d41ceaefd7a9e33039f9001918d47.tmp\czulo.dll
- %TEMP%\nss2.tmp
- %TEMP%\nsn3.tmp\md5dll.dll
Deletes the following files:
- %TEMP%\nsn3.tmp\md5dll.dll
- %TEMP%\d60d41ceaefd7a9e33039f9001918d47.tmp\czulo.dll
Miscellaneous:
Searches for the following windows:
- ClassName: 'Indicator' WindowName: ''
