Technical Information
To ensure autorun and distribution:
Creates the following services:
- [<HKLM>\SYSTEM\ControlSet001\services\sppsvc] 'Start' = '00000002'
Malicious functions:
Creates and executes the following:
- '%TEMP%\~nsu.tmp\Au_.exe' _?=<Current directory>\
Executes the following:
- '<SYSTEM32>\slui.exe' -Embedding
- '<SYSTEM32>\sppsvc.exe'
- '<SYSTEM32>\Wat\WatAdminSvc.exe' /run
- '<SYSTEM32>\Wat\WatAdminSvc.exe'
Modifies file system :
Creates the following files:
- %WINDIR%\ServiceProfiles\LocalService\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\C24EC5BDAF13613245B4CECC3DE91DC6
- %TEMP%\nsaCEF4.tmp\UserInfo.dll
- %TEMP%\nsaCEF4.tmp\md5dll.dll
- %WINDIR%\ServiceProfiles\LocalService\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\C24EC5BDAF13613245B4CECC3DE91DC6
- %WINDIR%\ServiceProfiles\NetworkService\AppData\Local\Temp\Cab77DF.tmp
- %WINDIR%\ServiceProfiles\NetworkService\AppData\Local\Temp\Cab77AE.tmp
- %WINDIR%\Temp\tmp558E.tmp
- %TEMP%\nsaCEF4.tmp\nsisos.dll
- %TEMP%\nsuCED3.tmp
- %TEMP%\~nsu.tmp\Au_.exe
- %TEMP%\nsfCB6A.tmp
- %TEMP%\nsaCEF4.tmp\StdUtils.dll
- %TEMP%\nsaCEF4.tmp\InstallerUtils2.dll
- %TEMP%\nsaCEF4.tmp\InstallerUtils.dll
- %TEMP%\nsaCEF4.tmp\System.dll
Deletes the following files:
- %TEMP%\nsaCEF4.tmp\UserInfo.dll
- %TEMP%\nsaCEF4.tmp\System.dll
- %WINDIR%\Temp\tmp558E.tmp
- %WINDIR%\ServiceProfiles\NetworkService\AppData\Local\Temp\Cab77DF.tmp
- %WINDIR%\ServiceProfiles\NetworkService\AppData\Local\Temp\Cab77AE.tmp
- %TEMP%\nsaCEF4.tmp\InstallerUtils2.dll
- %TEMP%\nsaCEF4.tmp\InstallerUtils.dll
- %TEMP%\nsaCEF4.tmp\md5dll.dll
- %TEMP%\nsaCEF4.tmp\StdUtils.dll
- %TEMP%\nsaCEF4.tmp\nsisos.dll
Network activity:
Connects to:
- '20#.#6.232.182':80
- 'ct###.#indowsupdate.com':80
- 'st###.###clientstaticsrv.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?a9##############
- st###.###clientstaticsrv.com/apps.gif?ac#########################################################################################################################################################################################################################################################################################################################################################
- ct###.#indowsupdate.com/msdownload/update/v3/static/trustedr/en/disallowedcertstl.cab?ee##############
- 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 st###.###clientstaticsrv.com
- DNS ASK ct###.#indowsupdate.com
Miscellaneous:
Searches for the following windows:
- ClassName: 'CabinetWClass' WindowName: ''
