Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run] 'Spool' = '%WINDIR%\spoolsv.exe /waitservice'
- [<HKCU>\Software\Microsoft\Windows NT\CurrentVersion\Windows] 'load' = '%TEMP%\cisvc.exe'
- [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run] 'IEudinit' = '%TEMP%\ieudinit.exe /waitservice'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run] 'Esent Utl' = '%APPDATA%\Roaming\Microsoft\esentutl.exe /waitservice'
Creates the following services:
- [<HKLM>\SYSTEM\ControlSet001\services\sppsvc] 'Start' = '00000002'
Malicious functions:
Creates and executes the following:
- '%TEMP%\cisvc.exe' /waitservice
Executes the following:
- '<SYSTEM32>\slui.exe' -Embedding
- '<SYSTEM32>\conhost.exe'
- '<SYSTEM32>\Wat\WatAdminSvc.exe' /run
- '<SYSTEM32>\Wat\WatAdminSvc.exe'
Modifies file system :
Creates the following files:
- %WINDIR%\Temp\tmp6566.tmp
- %WINDIR%\ServiceProfiles\LocalService\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\C24EC5BDAF13613245B4CECC3DE91DC6
- %WINDIR%\ServiceProfiles\NetworkService\AppData\Local\Temp\Cab896C.tmp
- %WINDIR%\ServiceProfiles\NetworkService\AppData\Local\Temp\Cab893B.tmp
- %WINDIR%\ServiceProfiles\LocalService\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\C24EC5BDAF13613245B4CECC3DE91DC6
- %APPDATA%\Roaming\Microsoft\esentutl.exe
- %TEMP%\ieudinit.exe
- %TEMP%\cisvc.exe
- %WINDIR%\spoolsv.exe
Deletes the following files:
- %WINDIR%\ServiceProfiles\NetworkService\AppData\Local\Temp\Cab896C.tmp
- %WINDIR%\ServiceProfiles\NetworkService\AppData\Local\Temp\Cab893B.tmp
- %WINDIR%\Temp\tmp6566.tmp
Network activity:
Connects to:
- '20#.#6.232.182':80
- 'ct###.#indowsupdate.com':80
- 'www.ka###rus.com':80
TCP:
HTTP GET requests:
- 20#.#6.232.182/pki/crl/products/WinPCA.crl
- 20#.#6.232.182/fwlink/?Li###########
- ct###.#indowsupdate.com/msdownload/update/v3/static/trustedr/en/disallowedcertstl.cab?c4##############
- www.ka###rus.com/img/gt.cgi?s=#################
- ct###.#indowsupdate.com/msdownload/update/v3/static/trustedr/en/disallowedcertstl.cab?fa##############
- 20#.#6.232.182/pki/crl/products/microsoftrootcert.crl
UDP:
- DNS ASK www.microsoft.com
- DNS ASK go.###rosoft.com
- DNS ASK crl.microsoft.com
- DNS ASK www.ka###rus.com
- DNS ASK ct###.#indowsupdate.com