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Analysis
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max time kernel
150s -
max time network
133s -
platform
windows10-2004_x64 -
resource
win10v2004-20230221-en -
resource tags
arch:x64arch:x86image:win10v2004-20230221-enlocale:en-usos:windows10-2004-x64system -
submitted
06/03/2023, 17:48
Behavioral task
behavioral1
Sample
cheker.exe
Resource
win7-20230220-en
Behavioral task
behavioral2
Sample
cheker.exe
Resource
win10v2004-20230221-en
General
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Target
cheker.exe
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Size
921KB
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MD5
41394beb6f31b8215c7b9d0b8d412c3e
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SHA1
c0436e7d59d3be57a1edc94ce52a5e03312aa368
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SHA256
9f2151b2fd626d5139a7a292b4faffdedcc45346953b0ce71fa281615e6f350a
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SHA512
dfd7ee246b53878037323ed246cf0aea90d43071a1499512e9db0b1b29376ab4cc09739ea03186839d47b7f2b54aa32c395eac4e67a6d32e7b37a78e4b5d9e1b
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SSDEEP
24576:n6A4MROxnF43F9MQrrZlI0AilFEvxHihrTE:n6jMiG4wrZlI0AilFEvxHih
Malware Config
Extracted
orcus
147.185.221.229:56094
0a90560fd1de4ef0859fc02bececce78
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autostart_method
Registry
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enable_keylogger
true
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install_path
%programfiles%\svhost\svhost.exe
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reconnect_delay
10000
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registry_keyname
Orcus
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taskscheduler_taskname
Orcus
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watchdog_path
AppData\svhost.exe
Signatures
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Orcus main payload 4 IoCs
resource yara_rule behavioral2/files/0x0007000000023158-194.dat family_orcus behavioral2/files/0x0007000000023158-200.dat family_orcus behavioral2/files/0x0007000000023158-203.dat family_orcus behavioral2/files/0x0007000000023158-207.dat family_orcus -
Orcurs Rat Executable 5 IoCs
resource yara_rule behavioral2/memory/1300-133-0x0000000000090000-0x000000000017C000-memory.dmp orcus behavioral2/files/0x0007000000023158-194.dat orcus behavioral2/files/0x0007000000023158-200.dat orcus behavioral2/files/0x0007000000023158-203.dat orcus behavioral2/files/0x0007000000023158-207.dat orcus -
Checks computer location settings 2 TTPs 3 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-2805025096-2326403612-4231045514-1000\Control Panel\International\Geo\Nation svhost.exe Key value queried \REGISTRY\USER\S-1-5-21-2805025096-2326403612-4231045514-1000\Control Panel\International\Geo\Nation cheker.exe Key value queried \REGISTRY\USER\S-1-5-21-2805025096-2326403612-4231045514-1000\Control Panel\International\Geo\Nation svhost.exe -
Executes dropped EXE 6 IoCs
pid Process 3696 WindowsInput.exe 4004 WindowsInput.exe 4424 svhost.exe 1172 svhost.exe 3680 svhost.exe 1876 svhost.exe -
Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-2805025096-2326403612-4231045514-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Orcus = "\"C:\\Program Files\\svhost\\svhost.exe\"" svhost.exe -
Drops desktop.ini file(s) 2 IoCs
description ioc Process File created C:\Windows\assembly\Desktop.ini cheker.exe File opened for modification C:\Windows\assembly\Desktop.ini cheker.exe -
Drops file in System32 directory 3 IoCs
description ioc Process File created C:\Windows\SysWOW64\WindowsInput.InstallState WindowsInput.exe File created C:\Windows\SysWOW64\WindowsInput.exe cheker.exe File created C:\Windows\SysWOW64\WindowsInput.exe.config cheker.exe -
Drops file in Program Files directory 3 IoCs
description ioc Process File created C:\Program Files\svhost\svhost.exe cheker.exe File opened for modification C:\Program Files\svhost\svhost.exe cheker.exe File created C:\Program Files\svhost\svhost.exe.config cheker.exe -
Drops file in Windows directory 3 IoCs
description ioc Process File opened for modification C:\Windows\assembly cheker.exe File created C:\Windows\assembly\Desktop.ini cheker.exe File opened for modification C:\Windows\assembly\Desktop.ini cheker.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Suspicious behavior: EnumeratesProcesses 64 IoCs
pid Process 4424 svhost.exe 4424 svhost.exe 4424 svhost.exe 1876 svhost.exe 1876 svhost.exe 1876 svhost.exe 4424 svhost.exe 1876 svhost.exe 4424 svhost.exe 1876 svhost.exe 4424 svhost.exe 1876 svhost.exe 4424 svhost.exe 1876 svhost.exe 4424 svhost.exe 1876 svhost.exe 4424 svhost.exe 1876 svhost.exe 4424 svhost.exe 1876 svhost.exe 4424 svhost.exe 1876 svhost.exe 4424 svhost.exe 1876 svhost.exe 4424 svhost.exe 1876 svhost.exe 4424 svhost.exe 1876 svhost.exe 4424 svhost.exe 1876 svhost.exe 4424 svhost.exe 1876 svhost.exe 4424 svhost.exe 1876 svhost.exe 4424 svhost.exe 1876 svhost.exe 4424 svhost.exe 1876 svhost.exe 4424 svhost.exe 1876 svhost.exe 4424 svhost.exe 1876 svhost.exe 4424 svhost.exe 1876 svhost.exe 4424 svhost.exe 1876 svhost.exe 4424 svhost.exe 1876 svhost.exe 4424 svhost.exe 1876 svhost.exe 4424 svhost.exe 1876 svhost.exe 4424 svhost.exe 1876 svhost.exe 4424 svhost.exe 1876 svhost.exe 4424 svhost.exe 1876 svhost.exe 4424 svhost.exe 1876 svhost.exe 4424 svhost.exe 1876 svhost.exe 4424 svhost.exe 1876 svhost.exe -
Suspicious use of AdjustPrivilegeToken 3 IoCs
description pid Process Token: SeDebugPrivilege 4424 svhost.exe Token: SeDebugPrivilege 3680 svhost.exe Token: SeDebugPrivilege 1876 svhost.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
pid Process 4424 svhost.exe -
Suspicious use of WriteProcessMemory 14 IoCs
description pid Process procid_target PID 1300 wrote to memory of 1780 1300 cheker.exe 84 PID 1300 wrote to memory of 1780 1300 cheker.exe 84 PID 1780 wrote to memory of 516 1780 csc.exe 86 PID 1780 wrote to memory of 516 1780 csc.exe 86 PID 1300 wrote to memory of 3696 1300 cheker.exe 90 PID 1300 wrote to memory of 3696 1300 cheker.exe 90 PID 1300 wrote to memory of 4424 1300 cheker.exe 92 PID 1300 wrote to memory of 4424 1300 cheker.exe 92 PID 4424 wrote to memory of 3680 4424 svhost.exe 95 PID 4424 wrote to memory of 3680 4424 svhost.exe 95 PID 4424 wrote to memory of 3680 4424 svhost.exe 95 PID 3680 wrote to memory of 1876 3680 svhost.exe 97 PID 3680 wrote to memory of 1876 3680 svhost.exe 97 PID 3680 wrote to memory of 1876 3680 svhost.exe 97 -
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\cheker.exe"C:\Users\Admin\AppData\Local\Temp\cheker.exe"1⤵
- Checks computer location settings
- Drops desktop.ini file(s)
- Drops file in System32 directory
- Drops file in Program Files directory
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:1300 -
C:\Windows\Microsoft.NET\Framework64\v2.0.50727\csc.exe"C:\Windows\Microsoft.NET\Framework64\v2.0.50727\csc.exe" /noconfig /fullpaths @"C:\Users\Admin\AppData\Local\Temp\fiyddxsp.cmdline"2⤵
- Suspicious use of WriteProcessMemory
PID:1780 -
C:\Windows\Microsoft.NET\Framework64\v2.0.50727\cvtres.exeC:\Windows\Microsoft.NET\Framework64\v2.0.50727\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\Admin\AppData\Local\Temp\RES7092.tmp" "c:\Users\Admin\AppData\Local\Temp\CSC7091.tmp"3⤵PID:516
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C:\Windows\SysWOW64\WindowsInput.exe"C:\Windows\SysWOW64\WindowsInput.exe" --install2⤵
- Executes dropped EXE
- Drops file in System32 directory
PID:3696
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C:\Program Files\svhost\svhost.exe"C:\Program Files\svhost\svhost.exe"2⤵
- Checks computer location settings
- Executes dropped EXE
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4424 -
C:\Users\Admin\AppData\Roaming\svhost.exe"C:\Users\Admin\AppData\Roaming\svhost.exe" /launchSelfAndExit "C:\Program Files\svhost\svhost.exe" 4424 /protectFile3⤵
- Checks computer location settings
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3680 -
C:\Users\Admin\AppData\Roaming\svhost.exe"C:\Users\Admin\AppData\Roaming\svhost.exe" /watchProcess "C:\Program Files\svhost\svhost.exe" 4424 "/protectFile"4⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1876
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C:\Windows\SysWOW64\WindowsInput.exe"C:\Windows\SysWOW64\WindowsInput.exe"1⤵
- Executes dropped EXE
PID:4004
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C:\Program Files\svhost\svhost.exe"C:\Program Files\svhost\svhost.exe"1⤵
- Executes dropped EXE
PID:1172
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
921KB
MD541394beb6f31b8215c7b9d0b8d412c3e
SHA1c0436e7d59d3be57a1edc94ce52a5e03312aa368
SHA2569f2151b2fd626d5139a7a292b4faffdedcc45346953b0ce71fa281615e6f350a
SHA512dfd7ee246b53878037323ed246cf0aea90d43071a1499512e9db0b1b29376ab4cc09739ea03186839d47b7f2b54aa32c395eac4e67a6d32e7b37a78e4b5d9e1b
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Filesize
921KB
MD541394beb6f31b8215c7b9d0b8d412c3e
SHA1c0436e7d59d3be57a1edc94ce52a5e03312aa368
SHA2569f2151b2fd626d5139a7a292b4faffdedcc45346953b0ce71fa281615e6f350a
SHA512dfd7ee246b53878037323ed246cf0aea90d43071a1499512e9db0b1b29376ab4cc09739ea03186839d47b7f2b54aa32c395eac4e67a6d32e7b37a78e4b5d9e1b
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Filesize
921KB
MD541394beb6f31b8215c7b9d0b8d412c3e
SHA1c0436e7d59d3be57a1edc94ce52a5e03312aa368
SHA2569f2151b2fd626d5139a7a292b4faffdedcc45346953b0ce71fa281615e6f350a
SHA512dfd7ee246b53878037323ed246cf0aea90d43071a1499512e9db0b1b29376ab4cc09739ea03186839d47b7f2b54aa32c395eac4e67a6d32e7b37a78e4b5d9e1b
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Filesize
921KB
MD541394beb6f31b8215c7b9d0b8d412c3e
SHA1c0436e7d59d3be57a1edc94ce52a5e03312aa368
SHA2569f2151b2fd626d5139a7a292b4faffdedcc45346953b0ce71fa281615e6f350a
SHA512dfd7ee246b53878037323ed246cf0aea90d43071a1499512e9db0b1b29376ab4cc09739ea03186839d47b7f2b54aa32c395eac4e67a6d32e7b37a78e4b5d9e1b
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Filesize
357B
MD5a2b76cea3a59fa9af5ea21ff68139c98
SHA135d76475e6a54c168f536e30206578babff58274
SHA256f99ef5bf79a7c43701877f0bb0b890591885bb0a3d605762647cc8ffbf10c839
SHA512b52608b45153c489419228864ecbcb92be24c644d470818dfe15f8c7e661a7bcd034ea13ef401f2b84ad5c29a41c9b4c7d161cc33ae3ef71659bc2bca1a8c4ad
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Filesize
425B
MD54eaca4566b22b01cd3bc115b9b0b2196
SHA1e743e0792c19f71740416e7b3c061d9f1336bf94
SHA25634ba0ab8d1850e7825763f413142a333ccbc05fa2b5499a28a7d27b8a1c5b4bb
SHA512bc2b1bf45203e3bb3009a7d37617b8f0f7ffa613680b32de2b963e39d2cf1650614d7035a0cf78f35a4f5cb17a2a439e2e07deaefd2a4275a62efd0a5c0184a1
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Filesize
1KB
MD5e5599ec3756d9d4578987818f06f7fae
SHA1decd56068b0d383821c10c96ccf6ccca83e379ec
SHA256962ed9d0d51d6d7cba753e00a24cc53b0803ef6d9494e7fa18dfd4d39f40c682
SHA5123ec2fd146428198d6367a50404b0ede4682fec8637154cfd5dd386c10f51d5436baa17a29c95e71cf249f9ef540fd74899d50223b5eeba77a6a6a5aa926abfaa
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Filesize
76KB
MD59584bda64fe97162484b2a1dbc92fd31
SHA190bbf1bec446b1d44bc2702fa93f2ca3fa719146
SHA256d7907e76da26317f8fc88aec7953f46f0a6d98f16a5e3e1fe456c817af608ea6
SHA512e200c3ad7d201e918bdb663b662513d1fc526bc02130d82c62e6c9e393f54bf8ba053a2be132ba7c4b8f5bad3fb0752251ef19fa14cd1534edbf63872e3008f0
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Filesize
9KB
MD5913967b216326e36a08010fb70f9dba3
SHA17b6f8c2eb5b443e03c212b85c2f0edb9c76ad2bf
SHA2568d880758549220154d2ff4ee578f2b49527c5fb76a07d55237b61e30bcc09e3a
SHA512c6fcb98d9fd509e9834fc3fba143bd36d41869cc104fbce5354951f0a6756156e34a30796baaa130dd45de3ed96e039ec14716716f6da4569915c7ef2d2b6c33
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Filesize
9KB
MD5913967b216326e36a08010fb70f9dba3
SHA17b6f8c2eb5b443e03c212b85c2f0edb9c76ad2bf
SHA2568d880758549220154d2ff4ee578f2b49527c5fb76a07d55237b61e30bcc09e3a
SHA512c6fcb98d9fd509e9834fc3fba143bd36d41869cc104fbce5354951f0a6756156e34a30796baaa130dd45de3ed96e039ec14716716f6da4569915c7ef2d2b6c33
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Filesize
9KB
MD5913967b216326e36a08010fb70f9dba3
SHA17b6f8c2eb5b443e03c212b85c2f0edb9c76ad2bf
SHA2568d880758549220154d2ff4ee578f2b49527c5fb76a07d55237b61e30bcc09e3a
SHA512c6fcb98d9fd509e9834fc3fba143bd36d41869cc104fbce5354951f0a6756156e34a30796baaa130dd45de3ed96e039ec14716716f6da4569915c7ef2d2b6c33
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Filesize
9KB
MD5913967b216326e36a08010fb70f9dba3
SHA17b6f8c2eb5b443e03c212b85c2f0edb9c76ad2bf
SHA2568d880758549220154d2ff4ee578f2b49527c5fb76a07d55237b61e30bcc09e3a
SHA512c6fcb98d9fd509e9834fc3fba143bd36d41869cc104fbce5354951f0a6756156e34a30796baaa130dd45de3ed96e039ec14716716f6da4569915c7ef2d2b6c33
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Filesize
357B
MD5a2b76cea3a59fa9af5ea21ff68139c98
SHA135d76475e6a54c168f536e30206578babff58274
SHA256f99ef5bf79a7c43701877f0bb0b890591885bb0a3d605762647cc8ffbf10c839
SHA512b52608b45153c489419228864ecbcb92be24c644d470818dfe15f8c7e661a7bcd034ea13ef401f2b84ad5c29a41c9b4c7d161cc33ae3ef71659bc2bca1a8c4ad
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Filesize
1KB
MD5f94ed2aab1920e149aa554b0a9fefd6d
SHA1accf059bf73e2c33c71953742bbfbfb0e3ed584a
SHA256fee1200c5e16bbbda66d761ce481162c4e15eb110142e386ac27281c5f49abdf
SHA5125bf9218917b751f503f08a76e06f62324da1eb097c3d80e15103beb3ca19b74b3dda70c89b56d64e7e97ba1a0321ef90c69b71e016ac308e3c8ba7b29fe087d1
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Filesize
21KB
MD5e6fcf516d8ed8d0d4427f86e08d0d435
SHA1c7691731583ab7890086635cb7f3e4c22ca5e409
SHA2568dbe814359391ed6b0b5b182039008cf1d00964da9fbc4747f46242a95c24337
SHA512c496cf8e2e222fe1e19051b291e6860f31aae39f54369c1c5e8c9758c4b56e8af904e3e536e743a0a6fdbbf8478afba4baee92e13fc1b3073376ac6bf4a7948e
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Filesize
21KB
MD5e6fcf516d8ed8d0d4427f86e08d0d435
SHA1c7691731583ab7890086635cb7f3e4c22ca5e409
SHA2568dbe814359391ed6b0b5b182039008cf1d00964da9fbc4747f46242a95c24337
SHA512c496cf8e2e222fe1e19051b291e6860f31aae39f54369c1c5e8c9758c4b56e8af904e3e536e743a0a6fdbbf8478afba4baee92e13fc1b3073376ac6bf4a7948e
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Filesize
21KB
MD5e6fcf516d8ed8d0d4427f86e08d0d435
SHA1c7691731583ab7890086635cb7f3e4c22ca5e409
SHA2568dbe814359391ed6b0b5b182039008cf1d00964da9fbc4747f46242a95c24337
SHA512c496cf8e2e222fe1e19051b291e6860f31aae39f54369c1c5e8c9758c4b56e8af904e3e536e743a0a6fdbbf8478afba4baee92e13fc1b3073376ac6bf4a7948e
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Filesize
21KB
MD5e6fcf516d8ed8d0d4427f86e08d0d435
SHA1c7691731583ab7890086635cb7f3e4c22ca5e409
SHA2568dbe814359391ed6b0b5b182039008cf1d00964da9fbc4747f46242a95c24337
SHA512c496cf8e2e222fe1e19051b291e6860f31aae39f54369c1c5e8c9758c4b56e8af904e3e536e743a0a6fdbbf8478afba4baee92e13fc1b3073376ac6bf4a7948e
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Filesize
357B
MD5a2b76cea3a59fa9af5ea21ff68139c98
SHA135d76475e6a54c168f536e30206578babff58274
SHA256f99ef5bf79a7c43701877f0bb0b890591885bb0a3d605762647cc8ffbf10c839
SHA512b52608b45153c489419228864ecbcb92be24c644d470818dfe15f8c7e661a7bcd034ea13ef401f2b84ad5c29a41c9b4c7d161cc33ae3ef71659bc2bca1a8c4ad
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Filesize
676B
MD503b34b13abfd358c63bf78af89d1033c
SHA1c4676167b5745dc2cda0e2f7396cacd6c39b27cf
SHA256b024c0855ca6639616416a387a38aff07605c94895a0f3bfed97138f234b84c2
SHA5128d4911b330ef77bf46fdd2515d42346cb47d9a4f0b81d07e92ff6dc849abc5ceb3e71fe2559f8db6312f9c46c7bc00a7629e2a5544220b88d710f2e0bc8d2d8e
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Filesize
208KB
MD57f692bf08fcef7d0093a44c9323492fc
SHA16db49df61b132af5fdc05cb920abb33baa9dc503
SHA256e8d6053a3c72e43bcfd45a74906a6eeea57a80224b175f364e9f0d3a9f91f485
SHA5125ca9560fbf5f0475e0b2f4cb0cf7c1b2565b111a8783b6759c08f03cc239a57b62e1b4e388534aefb94d58b384576ace88775e762f5d7178078648e1b5ce8084
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Filesize
349B
MD560c4dc6068385e0e2e79fe82f5cd9dd7
SHA14a67a92a1ce70b38a6c0e64119c12467725daf25
SHA256c62ceeb6a559bb7cdce0456b6e44ab3182dd8edfffba8f2e41b07faefd082202
SHA5124e0d86bc20fba9ec072d433ab3f5bbd6193c2d0259541416dcb50121b18ed7208e3f05b50a820720d49b97f30f873237f4f41a6115123c9f43fddd97cb2992ca