Analysis
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max time kernel
122s -
max time network
125s -
platform
windows7_x64 -
resource
win7-20240221-en -
resource tags
arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system -
submitted
26-02-2024 03:23
Behavioral task
behavioral1
Sample
baad3244b1b5663e0a7f121d90edd298.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
baad3244b1b5663e0a7f121d90edd298.exe
Resource
win10v2004-20240221-en
General
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Target
baad3244b1b5663e0a7f121d90edd298.exe
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Size
335KB
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MD5
baad3244b1b5663e0a7f121d90edd298
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SHA1
22a518e2ab331a1eaff6069b722d627638fbfbef
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SHA256
e48138f16524da77e9d85ec11596e668664c116bcd3c995641af0d52c0526def
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SHA512
9a3d61ef1061528aa9ca7289aa50af1d5d5b755159dd231d4a1594354992719f3f29058411a1bac38fc97b2a73cf6159b181b55e416a002404f053d5140a58ca
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SSDEEP
6144:0D9c9kL94GeFdhL29TuuXglosdU4GjbKqBaQy/oOERKlJ6LaY8:0x54GeFddmpXg+sdUhjWsat/oOERKz6G
Malware Config
Extracted
C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Crashpad\read_me.txt
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/2272-0-0x0000000000040000-0x000000000009A000-memory.dmp family_chaos behavioral1/files/0x000b000000012246-5.dat family_chaos behavioral1/memory/2152-7-0x0000000000930000-0x000000000098A000-memory.dmp 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 2196 bcdedit.exe 2552 bcdedit.exe -
Renames multiple (162) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
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pid Process 2760 wbadmin.exe -
Disables Task Manager via registry modification
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Drops startup file 3 IoCs
description ioc Process File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\read_me.txt XznShirkiCry.exe File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\XznShirkiCry.url XznShirkiCry.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\desktop.ini XznShirkiCry.exe -
Executes dropped EXE 1 IoCs
pid Process 2152 XznShirkiCry.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) 64 IoCs
description ioc Process File opened for modification C:\Users\Public\Documents\desktop.ini XznShirkiCry.exe File opened for modification C:\Users\Public\Recorded TV\Sample Media\desktop.ini XznShirkiCry.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\Accessories\Tablet PC\Desktop.ini XznShirkiCry.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\History\desktop.ini XznShirkiCry.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\RIK34FA8\desktop.ini XznShirkiCry.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\User Pinned\TaskBar\desktop.ini XznShirkiCry.exe File opened for modification C:\Users\Admin\Contacts\desktop.ini XznShirkiCry.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\Accessories\Accessibility\Desktop.ini XznShirkiCry.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\desktop.ini XznShirkiCry.exe File opened for modification C:\Users\Public\Recorded TV\desktop.ini XznShirkiCry.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\History\History.IE5\desktop.ini XznShirkiCry.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows Mail\Stationery\Desktop.ini XznShirkiCry.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Administrative Tools\desktop.ini XznShirkiCry.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\Games\Desktop.ini XznShirkiCry.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\GE3X1LT6\desktop.ini XznShirkiCry.exe File opened for modification C:\Users\Public\Libraries\desktop.ini XznShirkiCry.exe File opened for modification C:\Users\Public\Videos\desktop.ini XznShirkiCry.exe File opened for modification F:\$RECYCLE.BIN\S-1-5-21-406356229-2805545415-1236085040-1000\desktop.ini XznShirkiCry.exe File opened for modification C:\Users\Public\desktop.ini XznShirkiCry.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\desktop.ini XznShirkiCry.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Maintenance\Desktop.ini XznShirkiCry.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\Accessories\Windows PowerShell\desktop.ini XznShirkiCry.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\Burn\Burn\desktop.ini XznShirkiCry.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\desktop.ini XznShirkiCry.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\desktop.ini XznShirkiCry.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\LEIE6HVY\desktop.ini XznShirkiCry.exe File opened for modification C:\Users\Public\Downloads\desktop.ini XznShirkiCry.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\7GHXBWM1\desktop.ini XznShirkiCry.exe File opened for modification C:\Users\Admin\Links\desktop.ini XznShirkiCry.exe File opened for modification C:\Users\Admin\Searches\desktop.ini XznShirkiCry.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\desktop.ini XznShirkiCry.exe File opened for modification C:\Users\Default\AppData\Roaming\Microsoft\Windows\SendTo\Desktop.ini XznShirkiCry.exe File opened for modification C:\Users\Default\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Maintenance\Desktop.ini XznShirkiCry.exe File opened for modification C:\Users\Admin\Favorites\desktop.ini XznShirkiCry.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\System Tools\Desktop.ini XznShirkiCry.exe File opened for modification C:\Users\Admin\Documents\desktop.ini XznShirkiCry.exe File opened for modification C:\Users\Admin\Favorites\Links\desktop.ini XznShirkiCry.exe File opened for modification C:\Users\Admin\Music\desktop.ini XznShirkiCry.exe File opened for modification C:\Users\Default\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Desktop.ini XznShirkiCry.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\NOLTSD35\desktop.ini XznShirkiCry.exe File opened for modification C:\Users\Admin\Videos\desktop.ini XznShirkiCry.exe File opened for modification C:\Users\Public\Videos\Sample Videos\desktop.ini XznShirkiCry.exe File opened for modification C:\Users\Admin\Downloads\desktop.ini XznShirkiCry.exe File opened for modification C:\Users\Admin\Pictures\desktop.ini XznShirkiCry.exe File opened for modification C:\Users\Public\Music\Sample Music\desktop.ini XznShirkiCry.exe File opened for modification C:\Users\Public\Pictures\Sample Pictures\desktop.ini XznShirkiCry.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Desktop.ini XznShirkiCry.exe File opened for modification C:\Users\Admin\Favorites\Links for United States\desktop.ini XznShirkiCry.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\Accessories\System Tools\Desktop.ini XznShirkiCry.exe File opened for modification C:\Users\Public\Desktop\desktop.ini XznShirkiCry.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Accessibility\Desktop.ini XznShirkiCry.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\J66V1Z9V\desktop.ini XznShirkiCry.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\desktop.ini XznShirkiCry.exe File opened for modification C:\Users\Admin\Desktop\desktop.ini XznShirkiCry.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\Maintenance\Desktop.ini XznShirkiCry.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\Startup\desktop.ini XznShirkiCry.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\IXEVUZVE\desktop.ini XznShirkiCry.exe File opened for modification C:\Users\Default\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\desktop.ini XznShirkiCry.exe File opened for modification C:\Users\Default\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Accessibility\Desktop.ini XznShirkiCry.exe File opened for modification C:\Users\Default\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\System Tools\Desktop.ini XznShirkiCry.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Libraries\desktop.ini XznShirkiCry.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\desktop.ini XznShirkiCry.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\Administrative Tools\desktop.ini XznShirkiCry.exe File opened for modification C:\Users\Public\Music\desktop.ini XznShirkiCry.exe -
Sets desktop wallpaper using registry 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-406356229-2805545415-1236085040-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\a79te6tyu.jpg" XznShirkiCry.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Interacts with shadow copies 2 TTPs 1 IoCs
Shadow copies are often targeted by ransomware to inhibit system recovery.
pid Process 2596 vssadmin.exe -
Opens file in notepad (likely ransom note) 1 IoCs
pid Process 852 NOTEPAD.EXE -
Suspicious behavior: AddClipboardFormatListener 1 IoCs
pid Process 2152 XznShirkiCry.exe -
Suspicious behavior: EnumeratesProcesses 6 IoCs
pid Process 2272 baad3244b1b5663e0a7f121d90edd298.exe 2272 baad3244b1b5663e0a7f121d90edd298.exe 2152 XznShirkiCry.exe 2152 XznShirkiCry.exe 2152 XznShirkiCry.exe 2152 XznShirkiCry.exe -
Suspicious use of AdjustPrivilegeToken 48 IoCs
description pid Process Token: SeDebugPrivilege 2272 baad3244b1b5663e0a7f121d90edd298.exe Token: SeDebugPrivilege 2152 XznShirkiCry.exe Token: SeBackupPrivilege 2836 vssvc.exe Token: SeRestorePrivilege 2836 vssvc.exe Token: SeAuditPrivilege 2836 vssvc.exe Token: SeIncreaseQuotaPrivilege 2480 WMIC.exe Token: SeSecurityPrivilege 2480 WMIC.exe Token: SeTakeOwnershipPrivilege 2480 WMIC.exe Token: SeLoadDriverPrivilege 2480 WMIC.exe Token: SeSystemProfilePrivilege 2480 WMIC.exe Token: SeSystemtimePrivilege 2480 WMIC.exe Token: SeProfSingleProcessPrivilege 2480 WMIC.exe Token: SeIncBasePriorityPrivilege 2480 WMIC.exe Token: SeCreatePagefilePrivilege 2480 WMIC.exe Token: SeBackupPrivilege 2480 WMIC.exe Token: SeRestorePrivilege 2480 WMIC.exe Token: SeShutdownPrivilege 2480 WMIC.exe Token: SeDebugPrivilege 2480 WMIC.exe Token: SeSystemEnvironmentPrivilege 2480 WMIC.exe Token: SeRemoteShutdownPrivilege 2480 WMIC.exe Token: SeUndockPrivilege 2480 WMIC.exe Token: SeManageVolumePrivilege 2480 WMIC.exe Token: 33 2480 WMIC.exe Token: 34 2480 WMIC.exe Token: 35 2480 WMIC.exe Token: SeIncreaseQuotaPrivilege 2480 WMIC.exe Token: SeSecurityPrivilege 2480 WMIC.exe Token: SeTakeOwnershipPrivilege 2480 WMIC.exe Token: SeLoadDriverPrivilege 2480 WMIC.exe Token: SeSystemProfilePrivilege 2480 WMIC.exe Token: SeSystemtimePrivilege 2480 WMIC.exe Token: SeProfSingleProcessPrivilege 2480 WMIC.exe Token: SeIncBasePriorityPrivilege 2480 WMIC.exe Token: SeCreatePagefilePrivilege 2480 WMIC.exe Token: SeBackupPrivilege 2480 WMIC.exe Token: SeRestorePrivilege 2480 WMIC.exe Token: SeShutdownPrivilege 2480 WMIC.exe Token: SeDebugPrivilege 2480 WMIC.exe Token: SeSystemEnvironmentPrivilege 2480 WMIC.exe Token: SeRemoteShutdownPrivilege 2480 WMIC.exe Token: SeUndockPrivilege 2480 WMIC.exe Token: SeManageVolumePrivilege 2480 WMIC.exe Token: 33 2480 WMIC.exe Token: 34 2480 WMIC.exe Token: 35 2480 WMIC.exe Token: SeBackupPrivilege 2364 wbengine.exe Token: SeRestorePrivilege 2364 wbengine.exe Token: SeSecurityPrivilege 2364 wbengine.exe -
Suspicious use of WriteProcessMemory 30 IoCs
description pid Process procid_target PID 2272 wrote to memory of 2152 2272 baad3244b1b5663e0a7f121d90edd298.exe 28 PID 2272 wrote to memory of 2152 2272 baad3244b1b5663e0a7f121d90edd298.exe 28 PID 2272 wrote to memory of 2152 2272 baad3244b1b5663e0a7f121d90edd298.exe 28 PID 2152 wrote to memory of 2932 2152 XznShirkiCry.exe 29 PID 2152 wrote to memory of 2932 2152 XznShirkiCry.exe 29 PID 2152 wrote to memory of 2932 2152 XznShirkiCry.exe 29 PID 2932 wrote to memory of 2596 2932 cmd.exe 31 PID 2932 wrote to memory of 2596 2932 cmd.exe 31 PID 2932 wrote to memory of 2596 2932 cmd.exe 31 PID 2932 wrote to memory of 2480 2932 cmd.exe 34 PID 2932 wrote to memory of 2480 2932 cmd.exe 34 PID 2932 wrote to memory of 2480 2932 cmd.exe 34 PID 2152 wrote to memory of 2380 2152 XznShirkiCry.exe 36 PID 2152 wrote to memory of 2380 2152 XznShirkiCry.exe 36 PID 2152 wrote to memory of 2380 2152 XznShirkiCry.exe 36 PID 2380 wrote to memory of 2196 2380 cmd.exe 38 PID 2380 wrote to memory of 2196 2380 cmd.exe 38 PID 2380 wrote to memory of 2196 2380 cmd.exe 38 PID 2380 wrote to memory of 2552 2380 cmd.exe 39 PID 2380 wrote to memory of 2552 2380 cmd.exe 39 PID 2380 wrote to memory of 2552 2380 cmd.exe 39 PID 2152 wrote to memory of 772 2152 XznShirkiCry.exe 40 PID 2152 wrote to memory of 772 2152 XznShirkiCry.exe 40 PID 2152 wrote to memory of 772 2152 XznShirkiCry.exe 40 PID 772 wrote to memory of 2760 772 cmd.exe 42 PID 772 wrote to memory of 2760 772 cmd.exe 42 PID 772 wrote to memory of 2760 772 cmd.exe 42 PID 2152 wrote to memory of 852 2152 XznShirkiCry.exe 48 PID 2152 wrote to memory of 852 2152 XznShirkiCry.exe 48 PID 2152 wrote to memory of 852 2152 XznShirkiCry.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\baad3244b1b5663e0a7f121d90edd298.exe"C:\Users\Admin\AppData\Local\Temp\baad3244b1b5663e0a7f121d90edd298.exe"1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2272 -
C:\Users\Admin\AppData\Roaming\XznShirkiCry.exe"C:\Users\Admin\AppData\Roaming\XznShirkiCry.exe"2⤵
- Drops startup file
- Executes dropped EXE
- 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:2152 -
C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C vssadmin delete shadows /all /quiet & wmic shadowcopy delete3⤵
- Suspicious use of WriteProcessMemory
PID:2932 -
C:\Windows\system32\vssadmin.exevssadmin delete shadows /all /quiet4⤵
- Interacts with shadow copies
PID:2596
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C:\Windows\System32\Wbem\WMIC.exewmic shadowcopy delete4⤵
- Suspicious use of AdjustPrivilegeToken
PID:2480
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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:2380 -
C:\Windows\system32\bcdedit.exebcdedit /set {default} bootstatuspolicy ignoreallfailures4⤵
- Modifies boot configuration data using bcdedit
PID:2196
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C:\Windows\system32\bcdedit.exebcdedit /set {default} recoveryenabled no4⤵
- Modifies boot configuration data using bcdedit
PID:2552
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C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet3⤵
- Suspicious use of WriteProcessMemory
PID:772 -
C:\Windows\system32\wbadmin.exewbadmin delete catalog -quiet4⤵
- Deletes backup catalog
PID:2760
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C:\Windows\system32\NOTEPAD.EXE"C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\read_me.txt3⤵
- Opens file in notepad (likely ransom note)
PID:852
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2836
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C:\Windows\system32\wbengine.exe"C:\Windows\system32\wbengine.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2364
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C:\Windows\System32\vdsldr.exeC:\Windows\System32\vdsldr.exe -Embedding1⤵PID:2388
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C:\Windows\System32\vds.exeC:\Windows\System32\vds.exe1⤵PID:340
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
1KB
MD552a83c495f5a828fe1b086b6d75944a9
SHA17deaf788edbe768fc3216ebe0f51822882657d8c
SHA256f84164610a055bd6ee157f10503b845bb96baa96d6969d466192fc4ee5cb742d
SHA51261e8974e4329d8b33639e570fc4fc0f0babd64c7c4f6a61839988ec02b01f6647e73d9822fee3e54b3cfc992554c1994cb49d07767be10700a1a5c7ca2a78e20
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Filesize
1B
MD5d1457b72c3fb323a2671125aef3eab5d
SHA15bab61eb53176449e25c2c82f172b82cb13ffb9d
SHA2568a8de823d5ed3e12746a62ef169bcf372be0ca44f0a1236abc35df05d96928e1
SHA512ca63c07ad35d8c9fb0c92d6146759b122d4ec5d3f67ebe2f30ddb69f9e6c9fd3bf31a5e408b08f1d4d9cd68120cced9e57f010bef3cde97653fed5470da7d1a0
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Filesize
335KB
MD5baad3244b1b5663e0a7f121d90edd298
SHA122a518e2ab331a1eaff6069b722d627638fbfbef
SHA256e48138f16524da77e9d85ec11596e668664c116bcd3c995641af0d52c0526def
SHA5129a3d61ef1061528aa9ca7289aa50af1d5d5b755159dd231d4a1594354992719f3f29058411a1bac38fc97b2a73cf6159b181b55e416a002404f053d5140a58ca