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Analysis
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max time kernel
119s -
max time network
19s -
platform
windows7_x64 -
resource
win7-20240704-en -
resource tags
arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-x64system -
submitted
05/08/2024, 11:29
Behavioral task
behavioral1
Sample
874a68641338fd123d0f82c45e172b40N.exe
Resource
win7-20240704-en
Behavioral task
behavioral2
Sample
874a68641338fd123d0f82c45e172b40N.exe
Resource
win10v2004-20240802-en
General
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Target
874a68641338fd123d0f82c45e172b40N.exe
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Size
676KB
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MD5
874a68641338fd123d0f82c45e172b40
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SHA1
a277051174c933a4efb68aaf0231b0e619e3e0b3
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SHA256
735d52b8440b96c3d49f0c29e220c300141e1c90d124333ee4e7e9b55ac46b7e
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SHA512
41a8ef4fd8f8df14420bbb022877817dbaeb4900916ddd351fd10e9c65b119eb43f0924d85af30f6c379f412dc7f5ba77171d07477c8f1d53a3dcd57f30a6c20
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SSDEEP
12288:9kiL11aPKT1F5Vs+TVonB7krqRTUWfIVzJVUYMiGx/OHWtWOaM:9ki+PKT1F5S7BgORTWJOXBSM
Malware Config
Signatures
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Modifies firewall policy service 3 TTPs 8 IoCs
description ioc Process Key created \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile reg.exe Set value (int) \REGISTRY\MACHINE\SYSTEM\ControlSet001\services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\DoNotAllowExceptions = "0" reg.exe Key created \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List reg.exe Set value (str) \REGISTRY\MACHINE\SYSTEM\ControlSet001\services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List\C:\Users\Admin\AppData\Roaming\svhost32.exe = "C:\\Users\\Admin\\AppData\\Roaming\\svhost32.exe:*:Enabled:Windows Messanger" reg.exe Key created \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List reg.exe Set value (str) \REGISTRY\MACHINE\SYSTEM\ControlSet001\services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List\C:\Users\Admin\AppData\Roaming\csrs.exe = "C:\\Users\\Admin\\AppData\\Roaming\\csrs.exe:*:Enabled:Windows Messanger" reg.exe Key created \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile reg.exe Set value (int) \REGISTRY\MACHINE\SYSTEM\ControlSet001\services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\DoNotAllowExceptions = "0" reg.exe -
Executes dropped EXE 3 IoCs
pid Process 2332 XCoRK.exe 2856 csrs.exe 2448 csrs.exe -
Loads dropped DLL 10 IoCs
pid Process 2432 874a68641338fd123d0f82c45e172b40N.exe 2432 874a68641338fd123d0f82c45e172b40N.exe 2432 874a68641338fd123d0f82c45e172b40N.exe 2432 874a68641338fd123d0f82c45e172b40N.exe 2432 874a68641338fd123d0f82c45e172b40N.exe 2432 874a68641338fd123d0f82c45e172b40N.exe 2432 874a68641338fd123d0f82c45e172b40N.exe 2432 874a68641338fd123d0f82c45e172b40N.exe 2432 874a68641338fd123d0f82c45e172b40N.exe 2856 csrs.exe -
resource yara_rule behavioral1/memory/2432-0-0x0000000000400000-0x00000000005DC000-memory.dmp upx behavioral1/files/0x000900000001227c-9.dat upx behavioral1/memory/2432-19-0x0000000002990000-0x00000000029A7000-memory.dmp upx behavioral1/memory/2332-22-0x0000000000400000-0x0000000000417000-memory.dmp upx behavioral1/files/0x00080000000186c2-47.dat upx behavioral1/memory/2856-66-0x0000000000400000-0x00000000005DC000-memory.dmp upx behavioral1/memory/2432-65-0x0000000000400000-0x00000000005DC000-memory.dmp upx behavioral1/memory/2448-71-0x0000000000400000-0x000000000045D000-memory.dmp upx behavioral1/memory/2448-74-0x0000000000400000-0x000000000045D000-memory.dmp upx behavioral1/memory/2448-76-0x0000000000400000-0x000000000045D000-memory.dmp upx behavioral1/memory/2448-77-0x0000000000400000-0x000000000045D000-memory.dmp upx behavioral1/memory/2856-78-0x0000000000400000-0x00000000005DC000-memory.dmp upx behavioral1/memory/2332-84-0x0000000000400000-0x0000000000417000-memory.dmp upx behavioral1/memory/2448-85-0x0000000000400000-0x000000000045D000-memory.dmp upx behavioral1/memory/2448-87-0x0000000000400000-0x000000000045D000-memory.dmp upx behavioral1/memory/2448-89-0x0000000000400000-0x000000000045D000-memory.dmp upx behavioral1/memory/2448-92-0x0000000000400000-0x000000000045D000-memory.dmp upx behavioral1/memory/2448-94-0x0000000000400000-0x000000000045D000-memory.dmp upx behavioral1/memory/2448-99-0x0000000000400000-0x000000000045D000-memory.dmp upx behavioral1/memory/2448-101-0x0000000000400000-0x000000000045D000-memory.dmp upx behavioral1/memory/2448-106-0x0000000000400000-0x000000000045D000-memory.dmp upx -
Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-2212144002-1172735686-1556890956-1000\Software\Microsoft\Windows\CurrentVersion\Run\csrs = "C:\\Users\\Admin\\AppData\\Roaming\\csrs.exe" reg.exe -
Suspicious use of SetThreadContext 1 IoCs
description pid Process procid_target PID 2856 set thread context of 2448 2856 csrs.exe 34 -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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System Location Discovery: System Language Discovery 1 TTPs 14 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
description ioc Process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language reg.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language XCoRK.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language csrs.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language cmd.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language cmd.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language reg.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language cmd.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language reg.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language cmd.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language 874a68641338fd123d0f82c45e172b40N.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language csrs.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language reg.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language cmd.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language reg.exe -
Modifies registry key 1 TTPs 4 IoCs
pid Process 2276 reg.exe 2972 reg.exe 2912 reg.exe 2936 reg.exe -
Suspicious use of AdjustPrivilegeToken 35 IoCs
description pid Process Token: 1 2448 csrs.exe Token: SeCreateTokenPrivilege 2448 csrs.exe Token: SeAssignPrimaryTokenPrivilege 2448 csrs.exe Token: SeLockMemoryPrivilege 2448 csrs.exe Token: SeIncreaseQuotaPrivilege 2448 csrs.exe Token: SeMachineAccountPrivilege 2448 csrs.exe Token: SeTcbPrivilege 2448 csrs.exe Token: SeSecurityPrivilege 2448 csrs.exe Token: SeTakeOwnershipPrivilege 2448 csrs.exe Token: SeLoadDriverPrivilege 2448 csrs.exe Token: SeSystemProfilePrivilege 2448 csrs.exe Token: SeSystemtimePrivilege 2448 csrs.exe Token: SeProfSingleProcessPrivilege 2448 csrs.exe Token: SeIncBasePriorityPrivilege 2448 csrs.exe Token: SeCreatePagefilePrivilege 2448 csrs.exe Token: SeCreatePermanentPrivilege 2448 csrs.exe Token: SeBackupPrivilege 2448 csrs.exe Token: SeRestorePrivilege 2448 csrs.exe Token: SeShutdownPrivilege 2448 csrs.exe Token: SeDebugPrivilege 2448 csrs.exe Token: SeAuditPrivilege 2448 csrs.exe Token: SeSystemEnvironmentPrivilege 2448 csrs.exe Token: SeChangeNotifyPrivilege 2448 csrs.exe Token: SeRemoteShutdownPrivilege 2448 csrs.exe Token: SeUndockPrivilege 2448 csrs.exe Token: SeSyncAgentPrivilege 2448 csrs.exe Token: SeEnableDelegationPrivilege 2448 csrs.exe Token: SeManageVolumePrivilege 2448 csrs.exe Token: SeImpersonatePrivilege 2448 csrs.exe Token: SeCreateGlobalPrivilege 2448 csrs.exe Token: 31 2448 csrs.exe Token: 32 2448 csrs.exe Token: 33 2448 csrs.exe Token: 34 2448 csrs.exe Token: 35 2448 csrs.exe -
Suspicious use of SetWindowsHookEx 5 IoCs
pid Process 2432 874a68641338fd123d0f82c45e172b40N.exe 2856 csrs.exe 2448 csrs.exe 2448 csrs.exe 2448 csrs.exe -
Suspicious use of WriteProcessMemory 57 IoCs
description pid Process procid_target PID 2432 wrote to memory of 2332 2432 874a68641338fd123d0f82c45e172b40N.exe 29 PID 2432 wrote to memory of 2332 2432 874a68641338fd123d0f82c45e172b40N.exe 29 PID 2432 wrote to memory of 2332 2432 874a68641338fd123d0f82c45e172b40N.exe 29 PID 2432 wrote to memory of 2332 2432 874a68641338fd123d0f82c45e172b40N.exe 29 PID 2432 wrote to memory of 2888 2432 874a68641338fd123d0f82c45e172b40N.exe 30 PID 2432 wrote to memory of 2888 2432 874a68641338fd123d0f82c45e172b40N.exe 30 PID 2432 wrote to memory of 2888 2432 874a68641338fd123d0f82c45e172b40N.exe 30 PID 2432 wrote to memory of 2888 2432 874a68641338fd123d0f82c45e172b40N.exe 30 PID 2888 wrote to memory of 1240 2888 cmd.exe 32 PID 2888 wrote to memory of 1240 2888 cmd.exe 32 PID 2888 wrote to memory of 1240 2888 cmd.exe 32 PID 2888 wrote to memory of 1240 2888 cmd.exe 32 PID 2432 wrote to memory of 2856 2432 874a68641338fd123d0f82c45e172b40N.exe 33 PID 2432 wrote to memory of 2856 2432 874a68641338fd123d0f82c45e172b40N.exe 33 PID 2432 wrote to memory of 2856 2432 874a68641338fd123d0f82c45e172b40N.exe 33 PID 2432 wrote to memory of 2856 2432 874a68641338fd123d0f82c45e172b40N.exe 33 PID 2856 wrote to memory of 2448 2856 csrs.exe 34 PID 2856 wrote to memory of 2448 2856 csrs.exe 34 PID 2856 wrote to memory of 2448 2856 csrs.exe 34 PID 2856 wrote to memory of 2448 2856 csrs.exe 34 PID 2856 wrote to memory of 2448 2856 csrs.exe 34 PID 2856 wrote to memory of 2448 2856 csrs.exe 34 PID 2856 wrote to memory of 2448 2856 csrs.exe 34 PID 2856 wrote to memory of 2448 2856 csrs.exe 34 PID 2856 wrote to memory of 2448 2856 csrs.exe 34 PID 2448 wrote to memory of 2504 2448 csrs.exe 35 PID 2448 wrote to memory of 2504 2448 csrs.exe 35 PID 2448 wrote to memory of 2504 2448 csrs.exe 35 PID 2448 wrote to memory of 2504 2448 csrs.exe 35 PID 2448 wrote to memory of 2096 2448 csrs.exe 36 PID 2448 wrote to memory of 2096 2448 csrs.exe 36 PID 2448 wrote to memory of 2096 2448 csrs.exe 36 PID 2448 wrote to memory of 2096 2448 csrs.exe 36 PID 2448 wrote to memory of 1312 2448 csrs.exe 38 PID 2448 wrote to memory of 1312 2448 csrs.exe 38 PID 2448 wrote to memory of 1312 2448 csrs.exe 38 PID 2448 wrote to memory of 1312 2448 csrs.exe 38 PID 2096 wrote to memory of 2276 2096 cmd.exe 41 PID 2096 wrote to memory of 2276 2096 cmd.exe 41 PID 2096 wrote to memory of 2276 2096 cmd.exe 41 PID 2096 wrote to memory of 2276 2096 cmd.exe 41 PID 2448 wrote to memory of 1636 2448 csrs.exe 40 PID 2448 wrote to memory of 1636 2448 csrs.exe 40 PID 2448 wrote to memory of 1636 2448 csrs.exe 40 PID 2448 wrote to memory of 1636 2448 csrs.exe 40 PID 2504 wrote to memory of 2972 2504 cmd.exe 43 PID 2504 wrote to memory of 2972 2504 cmd.exe 43 PID 2504 wrote to memory of 2972 2504 cmd.exe 43 PID 2504 wrote to memory of 2972 2504 cmd.exe 43 PID 1312 wrote to memory of 2912 1312 cmd.exe 45 PID 1312 wrote to memory of 2912 1312 cmd.exe 45 PID 1312 wrote to memory of 2912 1312 cmd.exe 45 PID 1312 wrote to memory of 2912 1312 cmd.exe 45 PID 1636 wrote to memory of 2936 1636 cmd.exe 46 PID 1636 wrote to memory of 2936 1636 cmd.exe 46 PID 1636 wrote to memory of 2936 1636 cmd.exe 46 PID 1636 wrote to memory of 2936 1636 cmd.exe 46
Processes
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C:\Users\Admin\AppData\Local\Temp\874a68641338fd123d0f82c45e172b40N.exe"C:\Users\Admin\AppData\Local\Temp\874a68641338fd123d0f82c45e172b40N.exe"1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2432 -
C:\Users\Admin\AppData\Local\Temp\XCoRK.exe"C:\Users\Admin\AppData\Local\Temp\XCoRK.exe"2⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
PID:2332
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C:\Windows\SysWOW64\cmd.execmd /c ""C:\Users\Admin\AppData\Local\Temp\uqZEa.bat" "2⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2888 -
C:\Windows\SysWOW64\reg.exeREG ADD "HKCU\Software\Microsoft\Windows\CurrentVersion\Run" /v "csrs" /t REG_SZ /d "C:\Users\Admin\AppData\Roaming\csrs.exe" /f3⤵
- Adds Run key to start application
- System Location Discovery: System Language Discovery
PID:1240
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C:\Users\Admin\AppData\Roaming\csrs.exe"C:\Users\Admin\AppData\Roaming\csrs.exe"2⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2856 -
C:\Users\Admin\AppData\Roaming\csrs.exeC:\Users\Admin\AppData\Roaming\csrs.exe3⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2448 -
C:\Windows\SysWOW64\cmd.execmd /c REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile /v "DoNotAllowExceptions" /t REG_DWORD /d "0" /f4⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2504 -
C:\Windows\SysWOW64\reg.exeREG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile /v "DoNotAllowExceptions" /t REG_DWORD /d "0" /f5⤵
- Modifies firewall policy service
- System Location Discovery: System Language Discovery
- Modifies registry key
PID:2972
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C:\Windows\SysWOW64\cmd.execmd /c REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List /v "C:\Users\Admin\AppData\Roaming\csrs.exe" /t REG_SZ /d "C:\Users\Admin\AppData\Roaming\csrs.exe:*:Enabled:Windows Messanger" /f4⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2096 -
C:\Windows\SysWOW64\reg.exeREG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List /v "C:\Users\Admin\AppData\Roaming\csrs.exe" /t REG_SZ /d "C:\Users\Admin\AppData\Roaming\csrs.exe:*:Enabled:Windows Messanger" /f5⤵
- Modifies firewall policy service
- System Location Discovery: System Language Discovery
- Modifies registry key
PID:2276
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C:\Windows\SysWOW64\cmd.execmd /c REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile /v "DoNotAllowExceptions" /t REG_DWORD /d "0" /f4⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1312 -
C:\Windows\SysWOW64\reg.exeREG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile /v "DoNotAllowExceptions" /t REG_DWORD /d "0" /f5⤵
- Modifies firewall policy service
- System Location Discovery: System Language Discovery
- Modifies registry key
PID:2912
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C:\Windows\SysWOW64\cmd.execmd /c REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List /v "C:\Users\Admin\AppData\Roaming\svhost32.exe" /t REG_SZ /d "C:\Users\Admin\AppData\Roaming\svhost32.exe:*:Enabled:Windows Messanger" /f4⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1636 -
C:\Windows\SysWOW64\reg.exeREG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List /v "C:\Users\Admin\AppData\Roaming\svhost32.exe" /t REG_SZ /d "C:\Users\Admin\AppData\Roaming\svhost32.exe:*:Enabled:Windows Messanger" /f5⤵
- Modifies firewall policy service
- System Location Discovery: System Language Discovery
- Modifies registry key
PID:2936
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Network
MITRE ATT&CK Enterprise v15
Persistence
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Create or Modify System Process
1Windows Service
1Privilege Escalation
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Create or Modify System Process
1Windows Service
1Defense Evasion
Impair Defenses
1Disable or Modify System Firewall
1Modify Registry
3Replay Monitor
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Downloads
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Filesize
12KB
MD5466773bfcbd01059584cdae36e3c281c
SHA181e68615ef27cf363d6fe96582433c8a7ce8043b
SHA25621f0910a1d71dfc63744474b2ba6b8248d893226576ea48791dc0cef7dd52105
SHA5121088e7180a7d4ed717307c03884aebd945c5f78ffd6c4a4d7e84e504dc2da0434fe4173c63f1afd5a57e83e1783b3359ce123e85bb62699fb663bc9b1c02129f
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Filesize
130B
MD534a635bb69f9dc2d8e8ceba2f6b25308
SHA166bbd6b4eb975af0a799c6be7aaed6917f5df10c
SHA256eb18b0e443ffb00db0eb4438c0d3ec49cf67c3b7cbc9da8e25c60298c970a59a
SHA512ae355a265391afe02a37d82ffb0df6664788dc4aee975678aeb524ff47f889d1e5ecab42b073093d71494c9868276dc9794d4bebce4c967d866b189c136a9545
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Filesize
676KB
MD5fed11ea261494abb5998684f068b586a
SHA181f8ab7c8687ee34acf0cd6d363032f9145de27b
SHA2560bc84620e6c55b2c4b45c06670c41f3e6eb4e2e04c4955a349e74d508cf9858f
SHA5128c5ece8c5d7eee897450bb724f55be5ce5cfcc8122bca7daa87a939d2b53753f6f402d152db14762568dac00823c93f86cd23de1cc209edd248165651c0a7ef4