Technical Information
Malicious functions
Executes the following
- '%WINDIR%\syswow64\net.exe' stop "audioendpointbuilder" /y
- '%WINDIR%\syswow64\net.exe' stop "samss" /y
Injects code into
the following system processes:
- <SYSTEM32>\dwm.exe
- <SYSTEM32>\taskhost.exe
the following user processes:
- iexplore.exe
Modifies file system
Creates the following files
- %ALLUSERSPROFILE%\microsoft\crypto\rsa\machinekeys\08e575673cce10c72090304839888e02_36d1130a-ac2e-44f7-9dc1-e424fbcbe0ee
- C:\documents and settings\default\documents\my music\ryukreadme.html
- C:\documents and settings\default\documents\my pictures\ryukreadme.html
- C:\documents and settings\default\documents\my videos\ryukreadme.html
- C:\documents and settings\default\downloads\ryukreadme.html
- C:\documents and settings\default\favorites\ryukreadme.html
- C:\documents and settings\default\links\ryukreadme.html
- C:\documents and settings\public\ryukreadme.html
- C:\documents and settings\user\appdata\local\adobe\ryukreadme.html
- C:\documents and settings\public\downloads\ryukreadme.html
- C:\documents and settings\public\libraries\ryukreadme.html
- C:\documents and settings\public\recorded tv\ryukreadme.html
- C:\documents and settings\public\recorded tv\sample media\ryukreadme.html
- C:\documents and settings\user\ryukreadme.html
- C:\documents and settings\user\appdata\ryukreadme.html
- C:\documents and settings\default\saved games\ryukreadme.html
- C:\documents and settings\user\appdata\local\ryukreadme.html
- C:\documents and settings\default\appdata\roaming\microsoft\windows\templates\ryukreadme.html
- C:\documents and settings\default\appdata\roaming\microsoft\windows\start menu\programs\maintenance\ryukreadme.html
- C:\documents and settings\default\appdata\roaming\microsoft\windows\start menu\programs\accessories\system tools\ryukreadme.html
- C:\documents and settings\default\appdata\roaming\microsoft\windows\start menu\programs\accessories\accessibility\ryukreadme.html
- C:\documents and settings\default\appdata\roaming\microsoft\windows\start menu\programs\accessories\ryukreadme.html
- C:\documents and settings\default\appdata\roaming\microsoft\windows\start menu\programs\ryukreadme.html
- C:\documents and settings\default\appdata\roaming\microsoft\windows\start menu\ryukreadme.html
- C:\documents and settings\default\appdata\roaming\microsoft\windows\sendto\ryukreadme.html
- C:\documents and settings\default\appdata\roaming\microsoft\windows\recent\ryukreadme.html
- C:\documents and settings\default\appdata\roaming\microsoft\windows\printer shortcuts\ryukreadme.html
- C:\documents and settings\default\appdata\roaming\microsoft\windows\network shortcuts\ryukreadme.html
- C:\documents and settings\default\appdata\roaming\microsoft\windows\cookies\ryukreadme.html
- C:\documents and settings\default\appdata\roaming\microsoft\windows\ryukreadme.html
- C:\documents and settings\default\appdata\roaming\microsoft\internet explorer\quick launch\ryukreadme.html
- C:\documents and settings\default\documents\ryukreadme.html
- C:\documents and settings\all users\application data\application data\application data\application data\application data\application data\application data\microsoft\crypto\keys\68383f0e45dd9b02...
- C:\documents and settings\user\appdata\local\adobe\acrobat\ryukreadme.html
- C:\documents and settings\user\appdata\local\application data\application data\application data\application data\application data\application data\adobe\acrobat\dc\shareddataevents
- C:\documents and settings\default\ntuser.dat{016888bd-6c6f-11de-8d1d-001e0bcde3ec}.tmcontainer00000000000000000002.regtrans-ms
- C:\documents and settings\public\recorded tv\sample media\win7_scenic-demoshort_raw.wtv
- C:\documents and settings\user\appdata\local\adobe\acrocef\dc\acrobat\cookie\cookies
- C:\documents and settings\all users\application data\application data\application data\application data\package cache\{0d3e9e15-de7a-300b-96f1-b4af12b96488}v14.0.23026\packages\vcruntimeminimum...
- C:\documents and settings\user\appdata\local\application data\application data\application data\application data\application data\adobe\acrobat\dc\adobecmapfnt15.lst
- C:\documents and settings\user\appdata\local\adobe\color\profiles\wscrgb.icc
- C:\documents and settings\user\appdata\local\application data\application data\application data\application data\adobe\acrocef\dc\acrobat\cache\index
- C:\documents and settings\user\appdata\local\adobe\acrobat\dc\ryukreadme.html
- C:\documents and settings\user\appdata\local\application data\application data\application data\application data\adobe\acrocef\dc\acrobat\cache\data_1
- C:\documents and settings\user\appdata\local\application data\application data\application data\application data\adobe\acrocef\dc\acrobat\cache\data_2
- C:\documents and settings\user\appdata\local\application data\application data\application data\application data\application data\application data\application data\application data\application ...
- C:\documents and settings\user\appdata\local\adobe\acrobat\dc\iconcacherdr.dat
- C:\documents and settings\user\appdata\local\application data\application data\application data\application data\application data\application data\application data\application data\adobe\acroba...
- C:\documents and settings\user\appdata\local\application data\application data\application data\application data\application data\adobe\acrobat\dc\adobesysfnt15.lst
- C:\documents and settings\default\ntuser.dat{016888bd-6c6f-11de-8d1d-001e0bcde3ec}.tmcontainer00000000000000000001.regtrans-ms
- C:\documents and settings\default\ntuser.dat{016888bd-6c6f-11de-8d1d-001e0bcde3ec}.tm.blf
- C:\documents and settings\user\appdata\local\adobe\acrobat\dc\cache\ryukreadme.html
- C:\documents and settings\user\appdata\local\adobe\color\ryukreadme.html
- C:\documents and settings\user\appdata\local\adobe\acrobat\dc\cache\acrofnt15.lst
- volume{600ba660-c712-11e6-a54f-080027cffa47}\system volume information\tracking.log.tmp
- C:\documents and settings\user\appdata\local\adobe\acrocef\dc\acrobat\cache\data_0
- C:\documents and settings\public\libraries\recordedtv.library-ms
- C:\documents and settings\default\ntuser.dat
- C:\documents and settings\default\desktop\ryukreadme.html
- C:\documents and settings\user\appdata\local\adobe\color\profiles\ryukreadme.html
- C:\documents and settings\default\appdata\roaming\microsoft\internet explorer\ryukreadme.html
- C:\documents and settings\user\appdata\local\adobe\acrocef\dc\acrobat\cache\ryukreadme.html
- C:\documents and settings\user\appdata\local\adobe\acrocef\dc\acrobat\ryukreadme.html
- C:\documents and settings\user\appdata\local\adobe\acrocef\dc\ryukreadme.html
- C:\documents and settings\user\appdata\local\adobe\acrocef\ryukreadme.html
- C:\documents and settings\user\appdata\local\adobe\acrobat\dc\toolssearchcacherdr\ryukreadme.html
- C:\documents and settings\user\appdata\local\adobe\acrocef\dc\acrobat\cookie\ryukreadme.html
- C:\documents and settings\default\appdata\roaming\microsoft\ryukreadme.html
- C:\documents and settings\default\appdata\roaming\media center programs\ryukreadme.html
- C:\documents and settings\default\appdata\roaming\ryukreadme.html
- C:\documents and settings\all users\adobe\setup\{ac76ba86-7ad7-1033-7b44-ac0f074e4100}\ryukreadme.html
- C:\documents and settings\all users\application data\application data\application data\application data\application data\application data\application data\application data\microsoft\search\data...
- C:\documents and settings\all users\application data\application data\application data\application data\application data\application data\application data\application data\microsoft\assistance\...
- C:\documents and settings\all users\application data\application data\application data\application data\application data\application data\application data\application data\microsoft\device stag...
- C:\documents and settings\all users\application data\application data\application data\application data\application data\application data\application data\application data\application data\star...
- C:\documents and settings\all users\application data\application data\application data\application data\application data\application data\application data\application data\application data\pack...
- C:\documents and settings\all users\application data\application data\application data\application data\application data\application data\application data\application data\application data\docu...
- C:\documents and settings\all users\application data\application data\application data\application data\application data\application data\application data\application data\application data\micr...
- C:\documents and settings\all users\application data\application data\application data\application data\application data\application data\application data\application data\application data\appl...
- C:\documents and settings\all users\adobe\setup\{ac76ba86-7ad7-1033-7b44-ac0f074e4100}\acroread.msi
- C:\documents and settings\all users\adobe\setup\{ac76ba86-7ad7-1033-7b44-ac0f074e4100}\data1.cab
- C:\documents and settings\all users\adobe\arm\s\armmanifest.msi
- C:\documents and settings\all users\adobe\arm\reader_15.007.20033\readerdcmanifest.msi
- C:\documents and settings\all users\adobe\setup\{ac76ba86-7ad7-1033-7b44-ac0f074e4100}\acrordrdcupd1500820082.msp
- C:\documents and settings\all users\adobe\arm\reader_15.007.20033\acrordrdcupd1500920077.msp
- C:\documents and settings\all users\adobe\setup\ryukreadme.html
- C:\documents and settings\all users\adobe\ryukreadme.html
- C:\documents and settings\all users\adobe\arm\{291aa914-a987-4ce9-bd63-ac0a92d435e5}\ryukreadme.html
- C:\documents and settings\all users\adobe\arm\s\10428\ryukreadme.html
- C:\documents and settings\all users\adobe\arm\s\ryukreadme.html
- C:\documents and settings\all users\adobe\arm\reader_15.008.20082\ryukreadme.html
- C:\documents and settings\all users\adobe\arm\reader_15.007.20033\ryukreadme.html
- C:\documents and settings\all users\adobe\arm\ryukreadme.html
- C:\documents and settings\user\appdata\local\adobe\acrocef\dc\acrobat\cache\data_3
- C:\documents and settings\all users\ryukreadme.html
- C:\documents and settings\ryukreadme.html
- C:\ryukreadme.html
- D:\$recycle.bin\s-1-5-21-1960123792-2022915161-3775307078-1001\ryukreadme.html
- D:\$recycle.bin\ryukreadme.html
- D:\ryukreadme.html
- %TEMP%\ryukreadme.html
- C:\documents and settings\all users\application data\application data\application data\application data\application data\application data\application data\application data\package cache\{0d3e9e...
- C:\documents and settings\user\appdata\local\adobe\color\acecache11.lst
- C:\documents and settings\all users\application data\application data\application data\application data\application data\application data\application data\application data\package cache\{a2563e...
- C:\documents and settings\all users\application data\application data\application data\application data\application data\application data\application data\package cache\{bc958bd2-5dac-3862-bb1a...
- C:\documents and settings\all users\application data\application data\application data\application data\application data\application data\package cache\{be960c1c-7bad-3de6-8b1a-2616fe532845}v14...
- C:\documents and settings\all users\application data\application data\application data\application data\application data\application data\microsoft\windows\wer\reportqueue\noncritical_x64_4a8ed...
- C:\documents and settings\all users\application data\application data\application data\application data\application data\application data\microsoft\windows\wer\reportqueue\noncritical_x64_5d5d8...
- C:\documents and settings\all users\application data\application data\application data\application data\application data\application data\microsoft\windows\wer\reportqueue\noncritical_x64_d473a...
- C:\documents and settings\all users\application data\application data\application data\application data\application data\application data\package cache\{0d3e9e15-de7a-300b-96f1-b4af12b96488}v14...
- C:\documents and settings\all users\application data\application data\application data\application data\application data\application data\package cache\{a2563e55-3bec-3828-8d67-e5e8b9e8b675}v14...
- C:\documents and settings\all users\application data\application data\application data\application data\application data\application data\package cache\{bc958bd2-5dac-3862-bb1a-c1be0790438d}v14...
- C:\documents and settings\all users\application data\application data\application data\application data\application data\microsoft\windows\wer\reportqueue\appcrash_autokms.exe_efd62e343880604c4...
- C:\documents and settings\all users\application data\application data\application data\application data\application data\application data\application data\application data\package cache\42d5bec...
- C:\documents and settings\all users\application data\application data\application data\application data\application data\package cache\{bc958bd2-5dac-3862-bb1a-c1be0790438d}v14.0.23026\packages...
- C:\documents and settings\all users\application data\application data\application data\application data\application data\package cache\{be960c1c-7bad-3de6-8b1a-2616fe532845}v14.0.23026\packages...
- C:\documents and settings\default\ryukreadme.html
- C:\documents and settings\default\appdata\ryukreadme.html
- C:\documents and settings\default\appdata\local\ryukreadme.html
- C:\documents and settings\default\appdata\local\application data\application data\application data\application data\application data\application data\application data\application data\applicati...
- C:\documents and settings\all users\application data\application data\application data\application data\application data\application data\microsoft\windows\wer\reportqueue\appcrash_autokms.exe_...
- C:\documents and settings\all users\application data\application data\application data\application data\application data\application data\application data\microsoft\crypto\rsa\s-1-5-18\d42cc0c3...
- C:\documents and settings\all users\application data\application data\application data\application data\application data\application data\application data\package cache\{a2563e55-3bec-3828-8d67...
- C:\documents and settings\all users\application data\application data\application data\application data\application data\application data\application data\package cache\{0d3e9e15-de7a-300b-96f1...
- C:\documents and settings\all users\application data\application data\application data\application data\application data\application data\application data\package cache\42d5bec7ddfbd49e76467529...
- C:\documents and settings\all users\application data\application data\application data\application data\application data\application data\application data\microsoft\windows defender\definition ...
- C:\documents and settings\all users\application data\application data\application data\application data\application data\application data\application data\documents\my music\sample music\albuma...
- C:\documents and settings\all users\application data\application data\application data\application data\application data\application data\application data\microsoft\crypto\rsa\s-1-5-18\6d14e4b1...
- C:\documents and settings\all users\application data\application data\application data\application data\application data\application data\application data\application data\start menu\programs\m...
- C:\documents and settings\all users\application data\application data\application data\application data\application data\application data\application data\application data\package cache\{bc958b...
- C:\documents and settings\all users\application data\application data\application data\application data\application data\application data\application data\microsoft\crypto\rsa\machinekeys\08e57...
- C:\documents and settings\all users\application data\application data\application data\application data\application data\application data\application data\microsoft\search\data\applications\win...
- C:\documents and settings\all users\application data\application data\application data\application data\application data\application data\application data\microsoft\device stage\task\{e35be42d-...
- C:\documents and settings\all users\application data\application data\application data\application data\application data\application data\application data\microsoft\device stage\task\{07deb856-...
- C:\documents and settings\all users\application data\application data\application data\application data\application data\application data\application data\application data\package cache\{be960c...
- C:\documents and settings\all users\application data\application data\application data\application data\application data\application data\application data\package cache\{be960c1c-7bad-3de6-8b1a...
- C:\documents and settings\all users\application data\application data\application data\application data\application data\application data\application data\microsoft\crypto\rsa\s-1-5-18\5d91c0b7...
- C:\documents and settings\user\appdata\local\adobe\color\profiles\wsrgb.icc
Moves the following files
- from C:\documents and settings\all users\adobe\arm\reader_15.007.20033\acrordrdcupd1500920077.msp to C:\documents and settings\all users\adobe\arm\reader_15.007.20033\acrordrdcupd1500920077.msp.ryk
- from C:\documents and settings\user\appdata\local\application data\application data\application data\application data\adobe\acrocef\dc\acrobat\cache\data_2 to C:\documents and settings\user\appdata\local\application data\application data\application data\application data\adobe\acrocef\dc\acrobat\cache\data_2.ryk
- from C:\documents and settings\user\appdata\local\adobe\color\profiles\wscrgb.icc to C:\documents and settings\user\appdata\local\adobe\color\profiles\wscrgb.icc.ryk
- from C:\documents and settings\default\ntuser.dat.log1 to C:\documents and settings\default\ntuser.dat.log1.ryk
- from C:\documents and settings\public\recorded tv\sample media\win7_scenic-demoshort_raw.wtv to C:\documents and settings\public\recorded tv\sample media\win7_scenic-demoshort_raw.wtv.ryk
- from volume{600ba660-c712-11e6-a54f-080027cffa47}\system volume information\tracking.log.tmp to volume{600ba660-c712-11e6-a54f-080027cffa47}\system volume information\tracking.log
- from C:\documents and settings\default\ntuser.dat{016888bd-6c6f-11de-8d1d-001e0bcde3ec}.tmcontainer00000000000000000002.regtrans-ms to C:\documents and settings\default\ntuser.dat{016888bd-6c6f-11de-8d1d-001e0bcde3ec}.tmcontainer00000000000000000002.regtrans-ms.ryk
- from C:\documents and settings\default\ntuser.dat{016888bd-6c6f-11de-8d1d-001e0bcde3ec}.tmcontainer00000000000000000001.regtrans-ms to C:\documents and settings\default\ntuser.dat{016888bd-6c6f-11de-8d1d-001e0bcde3ec}.tmcontainer00000000000000000001.regtrans-ms.ryk
- from C:\documents and settings\default\ntuser.dat{016888bd-6c6f-11de-8d1d-001e0bcde3ec}.tm.blf to C:\documents and settings\default\ntuser.dat{016888bd-6c6f-11de-8d1d-001e0bcde3ec}.tm.blf.ryk
- from C:\documents and settings\public\libraries\recordedtv.library-ms to C:\documents and settings\public\libraries\recordedtv.library-ms.ryk
- from C:\documents and settings\default\ntuser.dat.log to C:\documents and settings\default\ntuser.dat.log.ryk
- from C:\documents and settings\all users\application data\application data\application data\application data\application data\package cache\{be960c1c-7bad-3de6-8b1a-2616fe532845}v14.0.23026\packages... to C:\documents and settings\all users\application data\application data\application data\application data\application data\package cache\{be960c1c-7bad-3de6-8b1a-2616fe532845}v14.0.23026\packages...
- from C:\documents and settings\all users\application data\application data\application data\application data\application data\package cache\{bc958bd2-5dac-3862-bb1a-c1be0790438d}v14.0.23026\packages... to C:\documents and settings\all users\application data\application data\application data\application data\application data\package cache\{bc958bd2-5dac-3862-bb1a-c1be0790438d}v14.0.23026\packages...
- from C:\documents and settings\all users\application data\application data\application data\application data\application data\application data\package cache\{bc958bd2-5dac-3862-bb1a-c1be0790438d}v14... to C:\documents and settings\all users\application data\application data\application data\application data\application data\application data\package cache\{bc958bd2-5dac-3862-bb1a-c1be0790438d}v14...
- from C:\documents and settings\all users\application data\application data\application data\application data\application data\application data\package cache\{be960c1c-7bad-3de6-8b1a-2616fe532845}v14... to C:\documents and settings\all users\application data\application data\application data\application data\application data\application data\package cache\{be960c1c-7bad-3de6-8b1a-2616fe532845}v14...
- from C:\documents and settings\all users\application data\application data\application data\application data\application data\application data\application data\microsoft\windows defender\definition ... to C:\documents and settings\all users\application data\application data\application data\application data\application data\application data\application data\microsoft\windows defender\definition ...
- from C:\documents and settings\all users\application data\application data\application data\application data\application data\application data\application data\microsoft\crypto\rsa\s-1-5-18\d42cc0c3... to C:\documents and settings\all users\application data\application data\application data\application data\application data\application data\application data\microsoft\crypto\rsa\s-1-5-18\d42cc0c3...
- from C:\documents and settings\all users\application data\application data\application data\application data\application data\application data\application data\microsoft\crypto\keys\68383f0e45dd9b02... to C:\documents and settings\all users\application data\application data\application data\application data\application data\application data\application data\microsoft\crypto\keys\68383f0e45dd9b02...
- from C:\documents and settings\all users\application data\application data\application data\application data\application data\application data\application data\microsoft\crypto\rsa\s-1-5-18\6d14e4b1... to C:\documents and settings\all users\application data\application data\application data\application data\application data\application data\application data\microsoft\crypto\rsa\s-1-5-18\6d14e4b1...
- from C:\documents and settings\all users\application data\application data\application data\application data\application data\application data\application data\microsoft\crypto\rsa\s-1-5-18\5d91c0b7... to C:\documents and settings\all users\application data\application data\application data\application data\application data\application data\application data\microsoft\crypto\rsa\s-1-5-18\5d91c0b7...
- from C:\documents and settings\all users\application data\application data\application data\application data\application data\application data\application data\application data\application data\pack... to C:\documents and settings\all users\application data\application data\application data\application data\application data\application data\application data\application data\application data\pack...
- from C:\documents and settings\all users\application data\application data\application data\application data\application data\application data\application data\application data\application data\docu... to C:\documents and settings\all users\application data\application data\application data\application data\application data\application data\application data\application data\application data\docu...
- from C:\documents and settings\all users\application data\application data\application data\application data\application data\application data\application data\application data\application data\micr... to C:\documents and settings\all users\application data\application data\application data\application data\application data\application data\application data\application data\application data\micr...
- from C:\documents and settings\all users\application data\application data\application data\application data\application data\application data\application data\application data\application data\appl... to C:\documents and settings\all users\application data\application data\application data\application data\application data\application data\application data\application data\application data\appl...
- from C:\documents and settings\all users\adobe\setup\{ac76ba86-7ad7-1033-7b44-ac0f074e4100}\data1.cab to C:\documents and settings\all users\adobe\setup\{ac76ba86-7ad7-1033-7b44-ac0f074e4100}\data1.cab.ryk
- from C:\documents and settings\all users\adobe\setup\{ac76ba86-7ad7-1033-7b44-ac0f074e4100}\acrordrdcupd1500820082.msp to C:\documents and settings\all users\adobe\setup\{ac76ba86-7ad7-1033-7b44-ac0f074e4100}\acrordrdcupd1500820082.msp.ryk
- from C:\documents and settings\all users\adobe\arm\s\armmanifest.msi to C:\documents and settings\all users\adobe\arm\s\armmanifest.msi.ryk
- from C:\documents and settings\all users\adobe\arm\reader_15.007.20033\readerdcmanifest.msi to C:\documents and settings\all users\adobe\arm\reader_15.007.20033\readerdcmanifest.msi.ryk
- from C:\documents and settings\user\appdata\local\adobe\color\profiles\wsrgb.icc to C:\documents and settings\user\appdata\local\adobe\color\profiles\wsrgb.icc.ryk
- from C:\documents and settings\user\appdata\local\application data\application data\application data\application data\application data\application data\application data\application data\application ... to C:\documents and settings\user\appdata\local\application data\application data\application data\application data\application data\application data\application data\application data\application ...
Modifies the following files
- D:\system volume information\tracking.log
Changes user data files extensions (Trojan.Encoder).
Miscellaneous
Creates and executes the following
- '%WINDIR%\syswow64\net.exe' stop "audioendpointbuilder" /y' (with hidden window)
- '%WINDIR%\syswow64\net.exe' stop "samss" /y' (with hidden window)
Executes the following
- '%WINDIR%\syswow64\net1.exe' stop "audioendpointbuilder" /y
- '%WINDIR%\syswow64\net1.exe' stop "samss" /y
