Analysis
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max time kernel
61s -
max time network
147s -
platform
windows10-2004_x64 -
resource
win10v2004-20220812-en -
resource tags
arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system -
submitted
26/10/2022, 01:40
Behavioral task
behavioral1
Sample
942a5ce563cd29c9a65cbf9ede722f2919de1a8391c12313be2c2606cb3503dd.exe
Resource
win7-20220901-en
Behavioral task
behavioral2
Sample
942a5ce563cd29c9a65cbf9ede722f2919de1a8391c12313be2c2606cb3503dd.exe
Resource
win10v2004-20220812-en
General
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Target
942a5ce563cd29c9a65cbf9ede722f2919de1a8391c12313be2c2606cb3503dd.exe
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Size
23KB
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MD5
ad64cd38dc59c90ca8cffc512cf4450b
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SHA1
b45af5d72ac60c552d1f3eed07508c4a6fbade5c
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SHA256
942a5ce563cd29c9a65cbf9ede722f2919de1a8391c12313be2c2606cb3503dd
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SHA512
55eca87344e24848e004c5a5255e7275314f3f5ca2d588e9900779977dbac3231eaa7e61ae303cde2be24084ec7447aa84276d5b00abe15cd10f5438b0813be3
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SSDEEP
384:n3Mg/bqo2bKKzM76pYDKF+98cJ3+r91CjEZb56e9t:xqo2nzRpYDKN03+r9uEZbgen
Malware Config
Extracted
C:\Users\Admin\Desktop\bitdecrypter.txt
chaos
Signatures
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Chaos
Ransomware family first seen in June 2021.
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Chaos Ransomware 3 IoCs
resource yara_rule behavioral2/memory/1940-132-0x0000000000A60000-0x0000000000A6C000-memory.dmp family_chaos behavioral2/files/0x000a000000022df6-135.dat family_chaos behavioral2/files/0x000a000000022df6-136.dat family_chaos -
Deletes shadow copies 2 TTPs
Ransomware often targets backup files to inhibit system recovery.
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Modifies boot configuration data using bcdedit 1 TTPs 2 IoCs
pid Process 3796 bcdedit.exe 3492 bcdedit.exe -
pid Process 4092 wbadmin.exe -
Executes dropped EXE 1 IoCs
pid Process 4956 coincrypter.exe -
Modifies extensions of user files 4 IoCs
Ransomware generally changes the extension on encrypted files.
description ioc Process File renamed C:\Users\Admin\Pictures\HideApprove.png => C:\Users\Admin\Pictures\HideApprove.png.exe coincrypter.exe File renamed C:\Users\Admin\Pictures\LockBackup.raw => C:\Users\Admin\Pictures\LockBackup.raw.exe coincrypter.exe File renamed C:\Users\Admin\Pictures\LockInitialize.png => C:\Users\Admin\Pictures\LockInitialize.png.exe coincrypter.exe File renamed C:\Users\Admin\Pictures\GroupResolve.png => C:\Users\Admin\Pictures\GroupResolve.png.exe coincrypter.exe -
Checks computer location settings 2 TTPs 2 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation 942a5ce563cd29c9a65cbf9ede722f2919de1a8391c12313be2c2606cb3503dd.exe Key value queried \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation coincrypter.exe -
Drops startup file 3 IoCs
description ioc Process File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\bitdecrypter.txt coincrypter.exe File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\coincrypter.url coincrypter.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\desktop.ini coincrypter.exe -
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
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Drops desktop.ini file(s) 33 IoCs
description ioc Process File opened for modification C:\Users\Admin\Pictures\Camera Roll\desktop.ini coincrypter.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\desktop.ini coincrypter.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\System Tools\Desktop.ini coincrypter.exe File opened for modification C:\Users\Public\Documents\desktop.ini coincrypter.exe File opened for modification C:\Users\Admin\Contacts\desktop.ini coincrypter.exe File opened for modification C:\Users\Admin\Documents\desktop.ini coincrypter.exe File opened for modification C:\Users\Admin\Favorites\desktop.ini coincrypter.exe File opened for modification C:\Users\Admin\Favorites\Links\desktop.ini coincrypter.exe File opened for modification C:\Users\Public\Desktop\desktop.ini coincrypter.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\desktop.ini coincrypter.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessibility\desktop.ini coincrypter.exe File opened for modification C:\Users\Public\Pictures\desktop.ini coincrypter.exe File opened for modification C:\Users\Admin\Music\desktop.ini coincrypter.exe File opened for modification C:\Users\Admin\OneDrive\desktop.ini coincrypter.exe File opened for modification C:\Users\Admin\Searches\desktop.ini coincrypter.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Libraries\desktop.ini coincrypter.exe File opened for modification C:\Users\Public\Music\desktop.ini coincrypter.exe File opened for modification C:\Users\Public\Videos\desktop.ini coincrypter.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\desktop.ini coincrypter.exe File opened for modification C:\Users\Admin\Desktop\desktop.ini coincrypter.exe File opened for modification C:\Users\Admin\Saved Games\desktop.ini coincrypter.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\desktop.ini coincrypter.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\User Pinned\TaskBar\desktop.ini coincrypter.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\AccountPictures\desktop.ini coincrypter.exe File opened for modification C:\Users\Admin\Pictures\Saved Pictures\desktop.ini coincrypter.exe File opened for modification C:\Users\Admin\Videos\desktop.ini coincrypter.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\SendTo\desktop.ini coincrypter.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Maintenance\Desktop.ini coincrypter.exe File opened for modification C:\Users\Admin\Links\desktop.ini coincrypter.exe File opened for modification C:\Users\Admin\Downloads\desktop.ini coincrypter.exe File opened for modification C:\Users\Admin\Pictures\desktop.ini coincrypter.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\desktop.ini coincrypter.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Administrative Tools\desktop.ini coincrypter.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Checks SCSI registry key(s) 3 TTPs 4 IoCs
SCSI information is often read in order to detect sandboxing environments.
description ioc Process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\DISK&VEN_DADY&PROD_HARDDISK\4&215468A5&0&000000 vds.exe Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_DADY&Prod_HARDDISK\4&215468a5&0&000000\FriendlyName vds.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\CDROM&VEN_DADY&PROD_DADY_DVD-ROM\4&215468A5&0&010000 vds.exe Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\CdRom&Ven_DADY&Prod_DADY_DVD-ROM\4&215468a5&0&010000\FriendlyName vds.exe -
Interacts with shadow copies 2 TTPs 1 IoCs
Shadow copies are often targeted by ransomware to inhibit system recovery.
pid Process 5008 vssadmin.exe -
Modifies registry class 1 IoCs
description ioc Process Key created \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000_Classes\Local Settings coincrypter.exe -
Opens file in notepad (likely ransom note) 1 IoCs
pid Process 1596 NOTEPAD.EXE -
Suspicious behavior: AddClipboardFormatListener 1 IoCs
pid Process 4956 coincrypter.exe -
Suspicious behavior: EnumeratesProcesses 53 IoCs
pid Process 1940 942a5ce563cd29c9a65cbf9ede722f2919de1a8391c12313be2c2606cb3503dd.exe 1940 942a5ce563cd29c9a65cbf9ede722f2919de1a8391c12313be2c2606cb3503dd.exe 1940 942a5ce563cd29c9a65cbf9ede722f2919de1a8391c12313be2c2606cb3503dd.exe 1940 942a5ce563cd29c9a65cbf9ede722f2919de1a8391c12313be2c2606cb3503dd.exe 1940 942a5ce563cd29c9a65cbf9ede722f2919de1a8391c12313be2c2606cb3503dd.exe 1940 942a5ce563cd29c9a65cbf9ede722f2919de1a8391c12313be2c2606cb3503dd.exe 1940 942a5ce563cd29c9a65cbf9ede722f2919de1a8391c12313be2c2606cb3503dd.exe 1940 942a5ce563cd29c9a65cbf9ede722f2919de1a8391c12313be2c2606cb3503dd.exe 1940 942a5ce563cd29c9a65cbf9ede722f2919de1a8391c12313be2c2606cb3503dd.exe 1940 942a5ce563cd29c9a65cbf9ede722f2919de1a8391c12313be2c2606cb3503dd.exe 1940 942a5ce563cd29c9a65cbf9ede722f2919de1a8391c12313be2c2606cb3503dd.exe 1940 942a5ce563cd29c9a65cbf9ede722f2919de1a8391c12313be2c2606cb3503dd.exe 1940 942a5ce563cd29c9a65cbf9ede722f2919de1a8391c12313be2c2606cb3503dd.exe 1940 942a5ce563cd29c9a65cbf9ede722f2919de1a8391c12313be2c2606cb3503dd.exe 1940 942a5ce563cd29c9a65cbf9ede722f2919de1a8391c12313be2c2606cb3503dd.exe 1940 942a5ce563cd29c9a65cbf9ede722f2919de1a8391c12313be2c2606cb3503dd.exe 1940 942a5ce563cd29c9a65cbf9ede722f2919de1a8391c12313be2c2606cb3503dd.exe 1940 942a5ce563cd29c9a65cbf9ede722f2919de1a8391c12313be2c2606cb3503dd.exe 1940 942a5ce563cd29c9a65cbf9ede722f2919de1a8391c12313be2c2606cb3503dd.exe 1940 942a5ce563cd29c9a65cbf9ede722f2919de1a8391c12313be2c2606cb3503dd.exe 1940 942a5ce563cd29c9a65cbf9ede722f2919de1a8391c12313be2c2606cb3503dd.exe 1940 942a5ce563cd29c9a65cbf9ede722f2919de1a8391c12313be2c2606cb3503dd.exe 1940 942a5ce563cd29c9a65cbf9ede722f2919de1a8391c12313be2c2606cb3503dd.exe 1940 942a5ce563cd29c9a65cbf9ede722f2919de1a8391c12313be2c2606cb3503dd.exe 1940 942a5ce563cd29c9a65cbf9ede722f2919de1a8391c12313be2c2606cb3503dd.exe 1940 942a5ce563cd29c9a65cbf9ede722f2919de1a8391c12313be2c2606cb3503dd.exe 1940 942a5ce563cd29c9a65cbf9ede722f2919de1a8391c12313be2c2606cb3503dd.exe 4956 coincrypter.exe 4956 coincrypter.exe 4956 coincrypter.exe 4956 coincrypter.exe 4956 coincrypter.exe 4956 coincrypter.exe 4956 coincrypter.exe 4956 coincrypter.exe 4956 coincrypter.exe 4956 coincrypter.exe 4956 coincrypter.exe 4956 coincrypter.exe 4956 coincrypter.exe 4956 coincrypter.exe 4956 coincrypter.exe 4956 coincrypter.exe 4956 coincrypter.exe 4956 coincrypter.exe 4956 coincrypter.exe 4956 coincrypter.exe 4956 coincrypter.exe 4956 coincrypter.exe 4956 coincrypter.exe 4956 coincrypter.exe 4956 coincrypter.exe 4956 coincrypter.exe -
Suspicious use of AdjustPrivilegeToken 50 IoCs
description pid Process Token: SeDebugPrivilege 1940 942a5ce563cd29c9a65cbf9ede722f2919de1a8391c12313be2c2606cb3503dd.exe Token: SeDebugPrivilege 4956 coincrypter.exe Token: SeBackupPrivilege 3060 vssvc.exe Token: SeRestorePrivilege 3060 vssvc.exe Token: SeAuditPrivilege 3060 vssvc.exe Token: SeIncreaseQuotaPrivilege 116 WMIC.exe Token: SeSecurityPrivilege 116 WMIC.exe Token: SeTakeOwnershipPrivilege 116 WMIC.exe Token: SeLoadDriverPrivilege 116 WMIC.exe Token: SeSystemProfilePrivilege 116 WMIC.exe Token: SeSystemtimePrivilege 116 WMIC.exe Token: SeProfSingleProcessPrivilege 116 WMIC.exe Token: SeIncBasePriorityPrivilege 116 WMIC.exe Token: SeCreatePagefilePrivilege 116 WMIC.exe Token: SeBackupPrivilege 116 WMIC.exe Token: SeRestorePrivilege 116 WMIC.exe Token: SeShutdownPrivilege 116 WMIC.exe Token: SeDebugPrivilege 116 WMIC.exe Token: SeSystemEnvironmentPrivilege 116 WMIC.exe Token: SeRemoteShutdownPrivilege 116 WMIC.exe Token: SeUndockPrivilege 116 WMIC.exe Token: SeManageVolumePrivilege 116 WMIC.exe Token: 33 116 WMIC.exe Token: 34 116 WMIC.exe Token: 35 116 WMIC.exe Token: 36 116 WMIC.exe Token: SeIncreaseQuotaPrivilege 116 WMIC.exe Token: SeSecurityPrivilege 116 WMIC.exe Token: SeTakeOwnershipPrivilege 116 WMIC.exe Token: SeLoadDriverPrivilege 116 WMIC.exe Token: SeSystemProfilePrivilege 116 WMIC.exe Token: SeSystemtimePrivilege 116 WMIC.exe Token: SeProfSingleProcessPrivilege 116 WMIC.exe Token: SeIncBasePriorityPrivilege 116 WMIC.exe Token: SeCreatePagefilePrivilege 116 WMIC.exe Token: SeBackupPrivilege 116 WMIC.exe Token: SeRestorePrivilege 116 WMIC.exe Token: SeShutdownPrivilege 116 WMIC.exe Token: SeDebugPrivilege 116 WMIC.exe Token: SeSystemEnvironmentPrivilege 116 WMIC.exe Token: SeRemoteShutdownPrivilege 116 WMIC.exe Token: SeUndockPrivilege 116 WMIC.exe Token: SeManageVolumePrivilege 116 WMIC.exe Token: 33 116 WMIC.exe Token: 34 116 WMIC.exe Token: 35 116 WMIC.exe Token: 36 116 WMIC.exe Token: SeBackupPrivilege 3980 wbengine.exe Token: SeRestorePrivilege 3980 wbengine.exe Token: SeSecurityPrivilege 3980 wbengine.exe -
Suspicious use of WriteProcessMemory 20 IoCs
description pid Process procid_target PID 1940 wrote to memory of 4956 1940 942a5ce563cd29c9a65cbf9ede722f2919de1a8391c12313be2c2606cb3503dd.exe 83 PID 1940 wrote to memory of 4956 1940 942a5ce563cd29c9a65cbf9ede722f2919de1a8391c12313be2c2606cb3503dd.exe 83 PID 4956 wrote to memory of 2324 4956 coincrypter.exe 85 PID 4956 wrote to memory of 2324 4956 coincrypter.exe 85 PID 2324 wrote to memory of 5008 2324 cmd.exe 87 PID 2324 wrote to memory of 5008 2324 cmd.exe 87 PID 2324 wrote to memory of 116 2324 cmd.exe 90 PID 2324 wrote to memory of 116 2324 cmd.exe 90 PID 4956 wrote to memory of 4988 4956 coincrypter.exe 91 PID 4956 wrote to memory of 4988 4956 coincrypter.exe 91 PID 4988 wrote to memory of 3796 4988 cmd.exe 93 PID 4988 wrote to memory of 3796 4988 cmd.exe 93 PID 4988 wrote to memory of 3492 4988 cmd.exe 94 PID 4988 wrote to memory of 3492 4988 cmd.exe 94 PID 4956 wrote to memory of 3660 4956 coincrypter.exe 95 PID 4956 wrote to memory of 3660 4956 coincrypter.exe 95 PID 3660 wrote to memory of 4092 3660 cmd.exe 97 PID 3660 wrote to memory of 4092 3660 cmd.exe 97 PID 4956 wrote to memory of 1596 4956 coincrypter.exe 101 PID 4956 wrote to memory of 1596 4956 coincrypter.exe 101
Processes
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C:\Users\Admin\AppData\Local\Temp\942a5ce563cd29c9a65cbf9ede722f2919de1a8391c12313be2c2606cb3503dd.exe"C:\Users\Admin\AppData\Local\Temp\942a5ce563cd29c9a65cbf9ede722f2919de1a8391c12313be2c2606cb3503dd.exe"1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1940 -
C:\Users\Admin\AppData\Roaming\coincrypter.exe"C:\Users\Admin\AppData\Roaming\coincrypter.exe"2⤵
- Executes dropped EXE
- Modifies extensions of user files
- Checks computer location settings
- Drops startup file
- Drops desktop.ini file(s)
- Modifies registry class
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4956 -
C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C vssadmin delete shadows /all /quiet & wmic shadowcopy delete3⤵
- Suspicious use of WriteProcessMemory
PID:2324 -
C:\Windows\system32\vssadmin.exevssadmin delete shadows /all /quiet4⤵
- Interacts with shadow copies
PID:5008
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C:\Windows\System32\Wbem\WMIC.exewmic shadowcopy delete4⤵
- Suspicious use of AdjustPrivilegeToken
PID:116
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C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C bcdedit /set {default} bootstatuspolicy ignoreallfailures & bcdedit /set {default} recoveryenabled no3⤵
- Suspicious use of WriteProcessMemory
PID:4988 -
C:\Windows\system32\bcdedit.exebcdedit /set {default} bootstatuspolicy ignoreallfailures4⤵
- Modifies boot configuration data using bcdedit
PID:3796
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C:\Windows\system32\bcdedit.exebcdedit /set {default} recoveryenabled no4⤵
- Modifies boot configuration data using bcdedit
PID:3492
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C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet3⤵
- Suspicious use of WriteProcessMemory
PID:3660 -
C:\Windows\system32\wbadmin.exewbadmin delete catalog -quiet4⤵
- Deletes backup catalog
PID:4092
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C:\Windows\system32\NOTEPAD.EXE"C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\bitdecrypter.txt3⤵
- Opens file in notepad (likely ransom note)
PID:1596
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:3060
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C:\Windows\system32\wbengine.exe"C:\Windows\system32\wbengine.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
PID:3980
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C:\Windows\System32\vdsldr.exeC:\Windows\System32\vdsldr.exe -Embedding1⤵PID:4336
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C:\Windows\System32\vds.exeC:\Windows\System32\vds.exe1⤵
- Checks SCSI registry key(s)
PID:1036
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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Filesize
964B
MD54217b8b83ce3c3f70029a056546f8fd0
SHA1487cdb5733d073a0427418888e8f7070fe782a03
SHA2567d767e907be373c680d1f7884d779588eb643bebb3f27bf3b5ed4864aa4d8121
SHA5122a58c99fa52f99c276e27eb98aef2ce1205f16d1e37b7e87eb69e9ecda22b578195a43f1a7f70fead6ba70421abf2f85c917551c191536eaf1f3011d3d24f740
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Filesize
23KB
MD5ad64cd38dc59c90ca8cffc512cf4450b
SHA1b45af5d72ac60c552d1f3eed07508c4a6fbade5c
SHA256942a5ce563cd29c9a65cbf9ede722f2919de1a8391c12313be2c2606cb3503dd
SHA51255eca87344e24848e004c5a5255e7275314f3f5ca2d588e9900779977dbac3231eaa7e61ae303cde2be24084ec7447aa84276d5b00abe15cd10f5438b0813be3
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Filesize
23KB
MD5ad64cd38dc59c90ca8cffc512cf4450b
SHA1b45af5d72ac60c552d1f3eed07508c4a6fbade5c
SHA256942a5ce563cd29c9a65cbf9ede722f2919de1a8391c12313be2c2606cb3503dd
SHA51255eca87344e24848e004c5a5255e7275314f3f5ca2d588e9900779977dbac3231eaa7e61ae303cde2be24084ec7447aa84276d5b00abe15cd10f5438b0813be3