Analysis
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max time kernel
17s -
max time network
17s -
platform
windows7_x64 -
resource
win7-20240903-en -
resource tags
arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system -
submitted
26-12-2024 09:07
Behavioral task
behavioral1
Sample
25bd57fe41090c497e345576494bfdde075a447d2869817bf33d5adcbad10465.exe
Resource
win7-20240903-en
Behavioral task
behavioral2
Sample
25bd57fe41090c497e345576494bfdde075a447d2869817bf33d5adcbad10465.exe
Resource
win10v2004-20241007-en
General
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Target
25bd57fe41090c497e345576494bfdde075a447d2869817bf33d5adcbad10465.exe
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Size
1.3MB
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MD5
a2ed0b9ac4d22a5fd805989e8fddaa08
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SHA1
d4ac9a85a5aa9e38dbed515b73d39ae10161c14e
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SHA256
25bd57fe41090c497e345576494bfdde075a447d2869817bf33d5adcbad10465
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SHA512
0f9d8f3ba9a78b780f4902ce1c2ea0681bcfe27652a4d4cb48590a5396840450389941c2af97051f4f669b6787d4536612536feabacecfbb5ce01ef8a49217f8
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SSDEEP
12288:4/weO8te/Elj30M9XKGlZOPHsejzfqnN+ByLWJXonZP3g3nTfrWzNnT4yi0krJto:IkDcZrEqC6BGx8GLvOqYaky4
Malware Config
Signatures
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Chaos
Ransomware family first seen in June 2021.
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Chaos Ransomware 3 IoCs
resource yara_rule behavioral1/memory/2440-1-0x0000000000DC0000-0x0000000000F08000-memory.dmp family_chaos behavioral1/memory/2016-8-0x0000000000D00000-0x0000000000E48000-memory.dmp family_chaos behavioral1/files/0x000d000000012262-7.dat family_chaos -
Chaos family
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Deletes shadow copies 3 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 2536 bcdedit.exe 2756 bcdedit.exe -
pid Process 2512 wbadmin.exe -
Disables Task Manager via registry modification
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Drops startup file 2 IoCs
description ioc Process File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\desktop.ini svchost.exe File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\read_it.txt svchost.exe -
Executes dropped EXE 1 IoCs
pid Process 2016 svchost.exe -
Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
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Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-3290804112-2823094203-3137964600-1000\Software\Microsoft\Windows\CurrentVersion\Run\UpdateTask = "C:\\Users\\Admin\\AppData\\Roaming\\svchost.exe" svchost.exe -
Drops desktop.ini file(s) 64 IoCs
description ioc Process File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\desktop.ini svchost.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\Startup\desktop.ini svchost.exe File opened for modification C:\Users\Public\Videos\Sample Videos\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\desktop.ini svchost.exe File opened for modification C:\Users\Default\AppData\Roaming\Microsoft\Windows\SendTo\Desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\YLJ4V77F\desktop.ini svchost.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\Accessories\Desktop.ini svchost.exe File opened for modification C:\Users\Public\Pictures\Sample Pictures\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Music\desktop.ini svchost.exe File opened for modification C:\Users\Public\Documents\desktop.ini svchost.exe File opened for modification C:\Users\Public\Downloads\desktop.ini svchost.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\Accessories\System Tools\Desktop.ini svchost.exe File opened for modification C:\Users\Admin\Searches\desktop.ini svchost.exe File opened for modification F:\$RECYCLE.BIN\S-1-5-21-3290804112-2823094203-3137964600-1000\desktop.ini svchost.exe File opened for modification C:\Users\Public\Libraries\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\User Pinned\TaskBar\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Contacts\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\desktop.ini svchost.exe File opened for modification C:\Users\Public\Recorded TV\Sample Media\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\System Tools\Desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\QJELLEL3\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\History\History.IE5\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Documents\desktop.ini svchost.exe File opened for modification C:\Users\Public\Recorded TV\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Downloads\desktop.ini svchost.exe File opened for modification C:\Users\Default\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\8NROS34R\desktop.ini svchost.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\Accessories\Tablet PC\Desktop.ini svchost.exe File opened for modification C:\Users\Public\Videos\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Libraries\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Pictures\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\Y3Z0XF05\desktop.ini svchost.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\Accessories\Accessibility\Desktop.ini svchost.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\Maintenance\Desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows Mail\Stationery\Desktop.ini svchost.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\Administrative Tools\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Favorites\Links\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Desktop\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\HWUYADN5\desktop.ini svchost.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\Accessories\Windows PowerShell\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\SendTo\Desktop.ini svchost.exe File opened for modification C:\Users\Default\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Desktop.ini svchost.exe File opened for modification C:\Users\Public\Music\Sample Music\desktop.ini svchost.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\Games\Desktop.ini svchost.exe File opened for modification C:\Users\Admin\Videos\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\RM4QEUM4\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Favorites\Links for United States\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\WY6T2DFU\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Maintenance\Desktop.ini svchost.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Ringtones\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Administrative Tools\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Links\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Favorites\desktop.ini svchost.exe File opened for modification C:\Users\Default\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Accessibility\Desktop.ini svchost.exe File opened for modification C:\Users\Default\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Maintenance\Desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\History\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Saved Games\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\HE9LBEC2\desktop.ini svchost.exe File opened for modification C:\Users\Public\desktop.ini svchost.exe File opened for modification C:\Users\Public\Music\desktop.ini svchost.exe -
Sets desktop wallpaper using registry 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-3290804112-2823094203-3137964600-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\rlgz5nzxo.jpg" svchost.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Interacts with shadow copies 3 TTPs 1 IoCs
Shadow copies are often targeted by ransomware to inhibit system recovery.
pid Process 2292 vssadmin.exe -
Opens file in notepad (likely ransom note) 1 IoCs
pid Process 2000 NOTEPAD.EXE -
Suspicious behavior: AddClipboardFormatListener 1 IoCs
pid Process 2016 svchost.exe -
Suspicious behavior: EnumeratesProcesses 5 IoCs
pid Process 2440 25bd57fe41090c497e345576494bfdde075a447d2869817bf33d5adcbad10465.exe 2440 25bd57fe41090c497e345576494bfdde075a447d2869817bf33d5adcbad10465.exe 2016 svchost.exe 2016 svchost.exe 2016 svchost.exe -
Suspicious use of AdjustPrivilegeToken 48 IoCs
description pid Process Token: SeDebugPrivilege 2440 25bd57fe41090c497e345576494bfdde075a447d2869817bf33d5adcbad10465.exe Token: SeDebugPrivilege 2016 svchost.exe Token: SeBackupPrivilege 2200 vssvc.exe Token: SeRestorePrivilege 2200 vssvc.exe Token: SeAuditPrivilege 2200 vssvc.exe Token: SeIncreaseQuotaPrivilege 2176 WMIC.exe Token: SeSecurityPrivilege 2176 WMIC.exe Token: SeTakeOwnershipPrivilege 2176 WMIC.exe Token: SeLoadDriverPrivilege 2176 WMIC.exe Token: SeSystemProfilePrivilege 2176 WMIC.exe Token: SeSystemtimePrivilege 2176 WMIC.exe Token: SeProfSingleProcessPrivilege 2176 WMIC.exe Token: SeIncBasePriorityPrivilege 2176 WMIC.exe Token: SeCreatePagefilePrivilege 2176 WMIC.exe Token: SeBackupPrivilege 2176 WMIC.exe Token: SeRestorePrivilege 2176 WMIC.exe Token: SeShutdownPrivilege 2176 WMIC.exe Token: SeDebugPrivilege 2176 WMIC.exe Token: SeSystemEnvironmentPrivilege 2176 WMIC.exe Token: SeRemoteShutdownPrivilege 2176 WMIC.exe Token: SeUndockPrivilege 2176 WMIC.exe Token: SeManageVolumePrivilege 2176 WMIC.exe Token: 33 2176 WMIC.exe Token: 34 2176 WMIC.exe Token: 35 2176 WMIC.exe Token: SeIncreaseQuotaPrivilege 2176 WMIC.exe Token: SeSecurityPrivilege 2176 WMIC.exe Token: SeTakeOwnershipPrivilege 2176 WMIC.exe Token: SeLoadDriverPrivilege 2176 WMIC.exe Token: SeSystemProfilePrivilege 2176 WMIC.exe Token: SeSystemtimePrivilege 2176 WMIC.exe Token: SeProfSingleProcessPrivilege 2176 WMIC.exe Token: SeIncBasePriorityPrivilege 2176 WMIC.exe Token: SeCreatePagefilePrivilege 2176 WMIC.exe Token: SeBackupPrivilege 2176 WMIC.exe Token: SeRestorePrivilege 2176 WMIC.exe Token: SeShutdownPrivilege 2176 WMIC.exe Token: SeDebugPrivilege 2176 WMIC.exe Token: SeSystemEnvironmentPrivilege 2176 WMIC.exe Token: SeRemoteShutdownPrivilege 2176 WMIC.exe Token: SeUndockPrivilege 2176 WMIC.exe Token: SeManageVolumePrivilege 2176 WMIC.exe Token: 33 2176 WMIC.exe Token: 34 2176 WMIC.exe Token: 35 2176 WMIC.exe Token: SeBackupPrivilege 2216 wbengine.exe Token: SeRestorePrivilege 2216 wbengine.exe Token: SeSecurityPrivilege 2216 wbengine.exe -
Suspicious use of WriteProcessMemory 30 IoCs
description pid Process procid_target PID 2440 wrote to memory of 2016 2440 25bd57fe41090c497e345576494bfdde075a447d2869817bf33d5adcbad10465.exe 28 PID 2440 wrote to memory of 2016 2440 25bd57fe41090c497e345576494bfdde075a447d2869817bf33d5adcbad10465.exe 28 PID 2440 wrote to memory of 2016 2440 25bd57fe41090c497e345576494bfdde075a447d2869817bf33d5adcbad10465.exe 28 PID 2016 wrote to memory of 2112 2016 svchost.exe 29 PID 2016 wrote to memory of 2112 2016 svchost.exe 29 PID 2016 wrote to memory of 2112 2016 svchost.exe 29 PID 2112 wrote to memory of 2292 2112 cmd.exe 31 PID 2112 wrote to memory of 2292 2112 cmd.exe 31 PID 2112 wrote to memory of 2292 2112 cmd.exe 31 PID 2112 wrote to memory of 2176 2112 cmd.exe 34 PID 2112 wrote to memory of 2176 2112 cmd.exe 34 PID 2112 wrote to memory of 2176 2112 cmd.exe 34 PID 2016 wrote to memory of 2980 2016 svchost.exe 36 PID 2016 wrote to memory of 2980 2016 svchost.exe 36 PID 2016 wrote to memory of 2980 2016 svchost.exe 36 PID 2980 wrote to memory of 2536 2980 cmd.exe 38 PID 2980 wrote to memory of 2536 2980 cmd.exe 38 PID 2980 wrote to memory of 2536 2980 cmd.exe 38 PID 2980 wrote to memory of 2756 2980 cmd.exe 39 PID 2980 wrote to memory of 2756 2980 cmd.exe 39 PID 2980 wrote to memory of 2756 2980 cmd.exe 39 PID 2016 wrote to memory of 2480 2016 svchost.exe 40 PID 2016 wrote to memory of 2480 2016 svchost.exe 40 PID 2016 wrote to memory of 2480 2016 svchost.exe 40 PID 2480 wrote to memory of 2512 2480 cmd.exe 42 PID 2480 wrote to memory of 2512 2480 cmd.exe 42 PID 2480 wrote to memory of 2512 2480 cmd.exe 42 PID 2016 wrote to memory of 2000 2016 svchost.exe 48 PID 2016 wrote to memory of 2000 2016 svchost.exe 48 PID 2016 wrote to memory of 2000 2016 svchost.exe 48 -
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.
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Uses Volume Shadow Copy service COM API
The Volume Shadow Copy service is used to manage backups/snapshots.
Processes
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C:\Users\Admin\AppData\Local\Temp\25bd57fe41090c497e345576494bfdde075a447d2869817bf33d5adcbad10465.exe"C:\Users\Admin\AppData\Local\Temp\25bd57fe41090c497e345576494bfdde075a447d2869817bf33d5adcbad10465.exe"1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2440 -
C:\Users\Admin\AppData\Roaming\svchost.exe"C:\Users\Admin\AppData\Roaming\svchost.exe"2⤵
- Drops startup file
- Executes dropped EXE
- Adds Run key to start application
- Drops desktop.ini file(s)
- Sets desktop wallpaper using registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2016 -
C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C vssadmin delete shadows /all /quiet & wmic shadowcopy delete3⤵
- Suspicious use of WriteProcessMemory
PID:2112 -
C:\Windows\system32\vssadmin.exevssadmin delete shadows /all /quiet4⤵
- Interacts with shadow copies
PID:2292
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C:\Windows\System32\Wbem\WMIC.exewmic shadowcopy delete4⤵
- Suspicious use of AdjustPrivilegeToken
PID:2176
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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:2980 -
C:\Windows\system32\bcdedit.exebcdedit /set {default} bootstatuspolicy ignoreallfailures4⤵
- Modifies boot configuration data using bcdedit
PID:2536
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C:\Windows\system32\bcdedit.exebcdedit /set {default} recoveryenabled no4⤵
- Modifies boot configuration data using bcdedit
PID:2756
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C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet3⤵
- Suspicious use of WriteProcessMemory
PID:2480 -
C:\Windows\system32\wbadmin.exewbadmin delete catalog -quiet4⤵
- Deletes backup catalog
PID:2512
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C:\Windows\system32\NOTEPAD.EXE"C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\read_it.txt3⤵
- Opens file in notepad (likely ransom note)
PID:2000
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2200
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C:\Windows\system32\wbengine.exe"C:\Windows\system32\wbengine.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2216
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C:\Windows\System32\vdsldr.exeC:\Windows\System32\vdsldr.exe -Embedding1⤵PID:2524
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C:\Windows\System32\vds.exeC:\Windows\System32\vds.exe1⤵PID:1968
Network
MITRE ATT&CK Enterprise v15
Privilege Escalation
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Defense Evasion
Direct Volume Access
1Indicator Removal
3File Deletion
3Modify Registry
2Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
288B
MD59f5e51975e60624345f3436146084f9e
SHA1f0b548d8e8568abba8fe4f9c32ed0fd0f0666d3c
SHA256fff125aed1c85389bbd02f42acada11526cf4d87e51c899e6d8cf9f3dfa2bd13
SHA5122325dd039cb255be05aa274186e1369401cfef3bfaa2ccfab39f9f95bffda5ab206fff2d538eafdea8ea49aba96ab82248c43083ed60b121b4b2765adcec22c6
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Filesize
1.3MB
MD5a2ed0b9ac4d22a5fd805989e8fddaa08
SHA1d4ac9a85a5aa9e38dbed515b73d39ae10161c14e
SHA25625bd57fe41090c497e345576494bfdde075a447d2869817bf33d5adcbad10465
SHA5120f9d8f3ba9a78b780f4902ce1c2ea0681bcfe27652a4d4cb48590a5396840450389941c2af97051f4f669b6787d4536612536feabacecfbb5ce01ef8a49217f8
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Filesize
1B
MD5d1457b72c3fb323a2671125aef3eab5d
SHA15bab61eb53176449e25c2c82f172b82cb13ffb9d
SHA2568a8de823d5ed3e12746a62ef169bcf372be0ca44f0a1236abc35df05d96928e1
SHA512ca63c07ad35d8c9fb0c92d6146759b122d4ec5d3f67ebe2f30ddb69f9e6c9fd3bf31a5e408b08f1d4d9cd68120cced9e57f010bef3cde97653fed5470da7d1a0