Analysis
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max time kernel
150s -
max time network
149s -
platform
windows10-2004_x64 -
resource
win10v2004-20231215-en -
resource tags
arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system -
submitted
14-01-2024 23:08
Static task
static1
Behavioral task
behavioral1
Sample
toolspab4.exe
Resource
win7-20231215-en
Behavioral task
behavioral2
Sample
toolspab4.exe
Resource
win10-20231215-en
Behavioral task
behavioral3
Sample
toolspab4.exe
Resource
win10v2004-20231215-en
Behavioral task
behavioral4
Sample
toolspab4.exe
Resource
win11-20231222-en
General
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Target
toolspab4.exe
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Size
206KB
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MD5
5784cb0aeb2ac45ece0689e7eecfc399
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SHA1
2d08f92794072432692225d06768b1b2dd37e2d5
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SHA256
12eb79f7104c4b5f780f5fc86145924fb81f3bc043c782328ad69c660a287670
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SHA512
cc2d49ee58955a3edbc08002e91caf63f9610bb4b3d34101d6025f047cc734ad0d825685114d5ae894d1c250ebd6c3fe265d8fb2120110d559cf345606fdfce1
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SSDEEP
3072:qXNx5tV7E7ycJc5GD5LhwrXoD6hYNRQSpPtgLE5eYoAVN:K3fV7WCGdhCoUi9pWLiZP
Malware Config
Extracted
smokeloader
pub4
Extracted
smokeloader
2020
http://host-file-host6.com/
http://host-host-file8.com/
Signatures
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Modifies firewall policy service 2 TTPs 4 IoCs
description ioc Process Key created \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\PublicProfile explorer.exe Set value (int) \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\PublicProfile\EnableFirewall = "0" explorer.exe Key created \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile explorer.exe Set value (int) \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\EnableFirewall = "0" explorer.exe -
SmokeLoader
Modular backdoor trojan in use since 2014.
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Sets file execution options in registry 2 TTPs 4 IoCs
description ioc Process Key created \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\1oic1c159.exe A8F2.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\1oic1c159.exe\DisableExceptionChainValidation A8F2.exe Key created \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\rstrui.exe explorer.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\rstrui.exe\Debugger = "coegq.exe" explorer.exe -
Checks BIOS information in registry 2 TTPs 1 IoCs
BIOS information is often read in order to detect sandboxing environments.
description ioc Process Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion explorer.exe -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-3791175113-1062217823-1177695025-1000\Control Panel\International\Geo\Nation ACAC.exe -
Deletes itself 1 IoCs
pid Process 3536 Process not Found -
Executes dropped EXE 4 IoCs
pid Process 4420 A8F2.exe 2176 ACAC.exe 4892 WindowsUpdater.exe 4952 cgrwcst -
Loads dropped DLL 2 IoCs
pid Process 4892 WindowsUpdater.exe 4892 WindowsUpdater.exe -
Adds Run key to start application 2 TTPs 2 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-3791175113-1062217823-1177695025-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\Java Updater = "C:\\ProgramData\\Java Updater\\1oic1c159.exe" explorer.exe Set value (str) \REGISTRY\USER\S-1-5-21-3791175113-1062217823-1177695025-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Java Updater = "\"C:\\ProgramData\\Java Updater\\1oic1c159.exe\"" explorer.exe -
description ioc Process Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA A8F2.exe -
Suspicious use of NtSetInformationThreadHideFromDebugger 8 IoCs
pid Process 4420 A8F2.exe 548 explorer.exe 548 explorer.exe 548 explorer.exe 548 explorer.exe 548 explorer.exe 548 explorer.exe 548 explorer.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Program crash 3 IoCs
pid pid_target Process procid_target 3896 4044 WerFault.exe 87 1544 548 WerFault.exe 100 4228 4952 WerFault.exe 106 -
NSIS installer 8 IoCs
resource yara_rule behavioral3/files/0x0008000000023220-34.dat nsis_installer_2 behavioral3/files/0x0008000000023220-35.dat nsis_installer_2 behavioral3/files/0x0006000000023221-41.dat nsis_installer_1 behavioral3/files/0x0006000000023221-41.dat nsis_installer_2 behavioral3/files/0x0006000000023221-45.dat nsis_installer_1 behavioral3/files/0x0006000000023221-45.dat nsis_installer_2 behavioral3/files/0x0006000000023221-47.dat nsis_installer_1 behavioral3/files/0x0006000000023221-47.dat nsis_installer_2 -
Checks SCSI registry key(s) 3 TTPs 6 IoCs
SCSI information is often read in order to detect sandboxing environments.
description ioc Process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI toolspab4.exe Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI toolspab4.exe Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI toolspab4.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI cgrwcst Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI cgrwcst Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI cgrwcst -
Checks processor information in registry 2 TTPs 4 IoCs
Processor information is often read in order to detect sandboxing environments.
description ioc Process Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 A8F2.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString A8F2.exe Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 explorer.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString explorer.exe -
Enumerates system info in registry 2 TTPs 2 IoCs
description ioc Process Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS explorer.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemManufacturer explorer.exe -
Modifies Internet Explorer Protected Mode 1 TTPs 4 IoCs
description ioc Process Set value (int) \REGISTRY\USER\S-1-5-21-3791175113-1062217823-1177695025-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3\2500 = "3" explorer.exe Set value (int) \REGISTRY\USER\S-1-5-21-3791175113-1062217823-1177695025-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\4\2500 = "3" explorer.exe Set value (int) \REGISTRY\USER\S-1-5-21-3791175113-1062217823-1177695025-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\1\2500 = "3" explorer.exe Set value (int) \REGISTRY\USER\S-1-5-21-3791175113-1062217823-1177695025-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\2\2500 = "3" explorer.exe -
Modifies Internet Explorer Protected Mode Banner 1 TTPs 1 IoCs
description ioc Process Set value (int) \REGISTRY\USER\S-1-5-21-3791175113-1062217823-1177695025-1000\SOFTWARE\Microsoft\Internet Explorer\Main\NoProtectedModeBanner = "1" explorer.exe -
description ioc Process Key created \REGISTRY\USER\S-1-5-21-3791175113-1062217823-1177695025-1000\Software\Microsoft\Internet Explorer\Main explorer.exe -
Suspicious behavior: EnumeratesProcesses 64 IoCs
pid Process 4044 toolspab4.exe 4044 toolspab4.exe 3536 Process not Found 3536 Process not Found 3536 Process not Found 3536 Process not Found 3536 Process not Found 3536 Process not Found 3536 Process not Found 3536 Process not Found 3536 Process not Found 3536 Process not Found 3536 Process not Found 3536 Process not Found 3536 Process not Found 3536 Process not Found 3536 Process not Found 3536 Process not Found 3536 Process not Found 3536 Process not Found 3536 Process not Found 3536 Process not Found 3536 Process not Found 3536 Process not Found 3536 Process not Found 3536 Process not Found 3536 Process not Found 3536 Process not Found 3536 Process not Found 3536 Process not Found 3536 Process not Found 3536 Process not Found 3536 Process not Found 3536 Process not Found 3536 Process not Found 3536 Process not Found 3536 Process not Found 3536 Process not Found 3536 Process not Found 3536 Process not Found 3536 Process not Found 3536 Process not Found 3536 Process not Found 3536 Process not Found 3536 Process not Found 3536 Process not Found 3536 Process not Found 3536 Process not Found 3536 Process not Found 3536 Process not Found 3536 Process not Found 3536 Process not Found 3536 Process not Found 3536 Process not Found 3536 Process not Found 3536 Process not Found 3536 Process not Found 3536 Process not Found 3536 Process not Found 3536 Process not Found 3536 Process not Found 3536 Process not Found 3536 Process not Found 3536 Process not Found -
Suspicious behavior: MapViewOfSection 4 IoCs
pid Process 4044 toolspab4.exe 4420 A8F2.exe 4420 A8F2.exe 4952 cgrwcst -
Suspicious use of AdjustPrivilegeToken 34 IoCs
description pid Process Token: SeShutdownPrivilege 3536 Process not Found Token: SeCreatePagefilePrivilege 3536 Process not Found Token: SeDebugPrivilege 4420 A8F2.exe Token: SeRestorePrivilege 4420 A8F2.exe Token: SeBackupPrivilege 4420 A8F2.exe Token: SeLoadDriverPrivilege 4420 A8F2.exe Token: SeCreatePagefilePrivilege 4420 A8F2.exe Token: SeShutdownPrivilege 4420 A8F2.exe Token: SeTakeOwnershipPrivilege 4420 A8F2.exe Token: SeChangeNotifyPrivilege 4420 A8F2.exe Token: SeCreateTokenPrivilege 4420 A8F2.exe Token: SeMachineAccountPrivilege 4420 A8F2.exe Token: SeSecurityPrivilege 4420 A8F2.exe Token: SeAssignPrimaryTokenPrivilege 4420 A8F2.exe Token: SeCreateGlobalPrivilege 4420 A8F2.exe Token: 33 4420 A8F2.exe Token: SeDebugPrivilege 548 explorer.exe Token: SeRestorePrivilege 548 explorer.exe Token: SeBackupPrivilege 548 explorer.exe Token: SeLoadDriverPrivilege 548 explorer.exe Token: SeCreatePagefilePrivilege 548 explorer.exe Token: SeShutdownPrivilege 548 explorer.exe Token: SeTakeOwnershipPrivilege 548 explorer.exe Token: SeChangeNotifyPrivilege 548 explorer.exe Token: SeCreateTokenPrivilege 548 explorer.exe Token: SeMachineAccountPrivilege 548 explorer.exe Token: SeSecurityPrivilege 548 explorer.exe Token: SeAssignPrimaryTokenPrivilege 548 explorer.exe Token: SeCreateGlobalPrivilege 548 explorer.exe Token: 33 548 explorer.exe Token: SeShutdownPrivilege 3536 Process not Found Token: SeCreatePagefilePrivilege 3536 Process not Found Token: SeShutdownPrivilege 3536 Process not Found Token: SeCreatePagefilePrivilege 3536 Process not Found -
Suspicious use of UnmapMainImage 1 IoCs
pid Process 3536 Process not Found -
Suspicious use of WriteProcessMemory 12 IoCs
description pid Process procid_target PID 3536 wrote to memory of 4420 3536 Process not Found 99 PID 3536 wrote to memory of 4420 3536 Process not Found 99 PID 3536 wrote to memory of 4420 3536 Process not Found 99 PID 4420 wrote to memory of 548 4420 A8F2.exe 100 PID 4420 wrote to memory of 548 4420 A8F2.exe 100 PID 4420 wrote to memory of 548 4420 A8F2.exe 100 PID 3536 wrote to memory of 2176 3536 Process not Found 101 PID 3536 wrote to memory of 2176 3536 Process not Found 101 PID 3536 wrote to memory of 2176 3536 Process not Found 101 PID 2176 wrote to memory of 4892 2176 ACAC.exe 102 PID 2176 wrote to memory of 4892 2176 ACAC.exe 102 PID 2176 wrote to memory of 4892 2176 ACAC.exe 102 -
Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
Processes
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C:\Users\Admin\AppData\Local\Temp\toolspab4.exe"C:\Users\Admin\AppData\Local\Temp\toolspab4.exe"1⤵
- Checks SCSI registry key(s)
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
PID:4044 -
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 4044 -s 4762⤵
- Program crash
PID:3896
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 4044 -ip 40441⤵PID:2036
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C:\Users\Admin\AppData\Local\Temp\A8F2.exeC:\Users\Admin\AppData\Local\Temp\A8F2.exe1⤵
- Sets file execution options in registry
- Executes dropped EXE
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Checks processor information in registry
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4420 -
C:\Windows\SysWOW64\explorer.exeC:\Windows\SysWOW64\explorer.exe2⤵
- Modifies firewall policy service
- Sets file execution options in registry
- Checks BIOS information in registry
- Adds Run key to start application
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Checks processor information in registry
- Enumerates system info in registry
- Modifies Internet Explorer Protected Mode
- Modifies Internet Explorer Protected Mode Banner
- Modifies Internet Explorer settings
- Suspicious use of AdjustPrivilegeToken
PID:548 -
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 548 -s 11403⤵
- Program crash
PID:1544
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C:\Users\Admin\AppData\Local\Temp\ACAC.exeC:\Users\Admin\AppData\Local\Temp\ACAC.exe1⤵
- Checks computer location settings
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:2176 -
C:\Users\Admin\AppData\Local\Temp\WindowsUpdater.exe"C:\Users\Admin\AppData\Local\Temp\WindowsUpdater.exe"2⤵
- Executes dropped EXE
- Loads dropped DLL
PID:4892
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 496 -p 548 -ip 5481⤵PID:1468
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C:\Users\Admin\AppData\Roaming\cgrwcstC:\Users\Admin\AppData\Roaming\cgrwcst1⤵
- Executes dropped EXE
- Checks SCSI registry key(s)
- Suspicious behavior: MapViewOfSection
PID:4952 -
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 4952 -s 4762⤵
- Program crash
PID:4228
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 496 -p 4952 -ip 49521⤵PID:976
Network
MITRE ATT&CK Enterprise v15
Persistence
Boot or Logon Autostart Execution
2Registry Run Keys / Startup Folder
2Create or Modify System Process
1Windows Service
1Privilege Escalation
Boot or Logon Autostart Execution
2Registry Run Keys / Startup Folder
2Create or Modify System Process
1Windows Service
1Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
360KB
MD580c413180b6bd0dd664adc4e0665b494
SHA1e791e4a3391fc6b7bcb58399cd4fa3c52a06b940
SHA2566d99cec56614b6b8a23dfa84a50c6bbfde535411c6366ac2bcc20c9f5af62880
SHA512347f4ae6f308b37d055a6177478e45ab3838d7020abed70c7aa138d2c3771e709de204da8550aebdcaa6139d869dc7328cc7e645c4dd48d1066f9ad70225644a
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Filesize
133KB
MD59cab0d52e82a0509214d25a9910060f7
SHA1076a3605fabc1df1dcefd88b2664dae065d72efd
SHA256b46c7a9ae98c192ee94298ec4b25c92f7756e4771eee65a9a52a9b458075509b
SHA51208867427a7ccf04923520b5c1c58c299cae407b91d8eb03078662889072d7be608df6d69024d7a5ac6bcd35ccf7406dff1c73b4fc242b9dddf088843e70d6d66
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Filesize
150KB
MD542861d527d36683cacc680f040874c41
SHA17b2a9980f6c4d60afdc70abac264dc262d65523c
SHA2565a595e488bafa28b564b2702676824804a7f09dd577e3ac05f5674b3127eb12d
SHA512721ac63931ccc93acb297b7e85cebbd861b64c46fd1826b44ae361f84cfbc1e4dd6cc824a530a0fff95d163b3f5ffcff13912c8d785dc7d943c18b258e916618
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Filesize
192KB
MD5fe26279d30946d954ceaa0747d208c82
SHA1d3083e7da29722457fcb2c8877f0abf02a17ea60
SHA256588466502ab995da882eedfffd48e0e50e123acc2369a89287ddaaea22d49e30
SHA512c59eb8bb6c66bae0656fd749d13abf03a294dfdeced0788dd03414e68aeb9c23071aa7d0fc13f711abfd0538354cce18070d7e700d6b778577bde809543eae7f
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Filesize
97KB
MD5c3f83b2d1178869e4963a0dd867b0daf
SHA1cab1e0fd51872623cd1526e4a70af2b32fbaf1cc
SHA2563014d5f0f6c192493b19e583553c3f0e2abb2e0363ba2a010b931172f5ebae1d
SHA5127ad5409b7124c570483e590165b1ac59d29cae0c3435ae7facbd872c731a01451120dfe2d9c90e8fdcb63ebfbf659ca06025e3d303065bbdc2d7199883c409fd
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Filesize
137KB
MD5c2b368b7f276a1960cc2dfcdb7684301
SHA12663466a4aa719aa4790f9ca3829b7f3ece61910
SHA256e0baa9603853d9c5ee302820587a0fe1cdd93c2b0cdd26e307a7677779dbb97f
SHA512637039917c1c346ba317625c452e68b32ee83726c1d7b9eef0f5c8dc23a0b695ae5f10e7a3cbbfd8cd599ec001ba9667d0e06ebf85630a79988c87abe8600652
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Filesize
115KB
MD58d72a822da8132d45fdf819f883bfdd7
SHA1979432bf86848b45721cd6450bf0c1fd5a8aa68b
SHA256f6d7e95be72a2241fa122b8c9dc1165065be9dfdfcee0df718a762f168754e7a
SHA512daa232d578420fd838641761e50d2639bbf6df43ef303031e1c82e326e6b987dc17d81e261490689aa7eeff69348f7782fe7f3cad642e033731ffd3b94be14b6
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Filesize
12KB
MD5dd87a973e01c5d9f8e0fcc81a0af7c7a
SHA1c9206ced48d1e5bc648b1d0f54cccc18bf643a14
SHA2567fb0f8d452fefaac789986b933df050f3d3e4feb8a8d9944ada995f572dcdca1
SHA5124910b39b1a99622ac8b3c42f173bbe7035ac2f8d40c946468e7db7e2868a2da81ea94da453857f06f39957dd690c7f1ba498936a7aaa0039975e472376f92e8f
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Filesize
206KB
MD55784cb0aeb2ac45ece0689e7eecfc399
SHA12d08f92794072432692225d06768b1b2dd37e2d5
SHA25612eb79f7104c4b5f780f5fc86145924fb81f3bc043c782328ad69c660a287670
SHA512cc2d49ee58955a3edbc08002e91caf63f9610bb4b3d34101d6025f047cc734ad0d825685114d5ae894d1c250ebd6c3fe265d8fb2120110d559cf345606fdfce1