Analysis
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max time kernel
52s -
max time network
53s -
platform
windows10-2004_x64 -
resource
win10v2004-20240802-en -
resource tags
arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system -
submitted
02-10-2024 19:31
Behavioral task
behavioral1
Sample
8255e2d4929a77203721d93e3945e5cbf1fcaf3c2fe052b7cd18a5e0846e0dfe.exe
Resource
win7-20240903-en
Behavioral task
behavioral2
Sample
8255e2d4929a77203721d93e3945e5cbf1fcaf3c2fe052b7cd18a5e0846e0dfe.exe
Resource
win10v2004-20240802-en
General
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Target
8255e2d4929a77203721d93e3945e5cbf1fcaf3c2fe052b7cd18a5e0846e0dfe.exe
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Size
21KB
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MD5
14d1c2327c5bdde7656b7535f7936d92
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SHA1
20c05343aff8bc0661aa928c26bee1146ee7f454
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SHA256
8255e2d4929a77203721d93e3945e5cbf1fcaf3c2fe052b7cd18a5e0846e0dfe
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SHA512
195a525d09c977fa05acf5ac6eb7fc5690e83879555137c20838facf74bf7248ef15af2a2298e7bb02dc98e6bc61b37a6f11d8f7a0d4d7182447ac400d8618d9
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SSDEEP
384:U3Mg/bqo2b52NspBRdwdQJer91Cyu6eF:qqo2AspOdYer9x3eF
Malware Config
Signatures
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Chaos
Ransomware family first seen in June 2021.
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Chaos Ransomware 2 IoCs
Processes:
resource yara_rule behavioral2/memory/1652-1-0x0000000000380000-0x000000000038C000-memory.dmp family_chaos C:\Users\Admin\AppData\Roaming\svchost.exe family_chaos -
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
Processes:
bcdedit.exebcdedit.exepid process 2076 bcdedit.exe 2748 bcdedit.exe -
Renames multiple (197) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
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Processes:
wbadmin.exepid process 4740 wbadmin.exe -
Checks computer location settings 2 TTPs 2 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
8255e2d4929a77203721d93e3945e5cbf1fcaf3c2fe052b7cd18a5e0846e0dfe.exesvchost.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-2170637797-568393320-3232933035-1000\Control Panel\International\Geo\Nation 8255e2d4929a77203721d93e3945e5cbf1fcaf3c2fe052b7cd18a5e0846e0dfe.exe Key value queried \REGISTRY\USER\S-1-5-21-2170637797-568393320-3232933035-1000\Control Panel\International\Geo\Nation svchost.exe -
Drops startup file 3 IoCs
Processes:
svchost.exedescription ioc process File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\read_it.txt svchost.exe File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.url svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\desktop.ini svchost.exe -
Executes dropped EXE 1 IoCs
Processes:
svchost.exepid process 4564 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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Drops desktop.ini file(s) 34 IoCs
Processes:
svchost.exedescription ioc process File opened for modification F:\$RECYCLE.BIN\S-1-5-21-2170637797-568393320-3232933035-1000\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\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Administrative Tools\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessibility\desktop.ini svchost.exe File opened for modification C:\Users\Public\Desktop\desktop.ini svchost.exe File opened for modification C:\Users\Admin\OneDrive\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Favorites\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\AccountPictures\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\Roaming\Microsoft\Internet Explorer\Quick Launch\desktop.ini svchost.exe File opened for modification C:\Users\Public\Pictures\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Links\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Pictures\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Pictures\Camera Roll\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Searches\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\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Documents\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\Admin\AppData\Roaming\Microsoft\Windows\SendTo\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\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Maintenance\Desktop.ini svchost.exe File opened for modification C:\Users\Public\Documents\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Pictures\Saved Pictures\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Music\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\Favorites\Links\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Videos\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\System Tools\Desktop.ini svchost.exe File opened for modification C:\Users\Public\Music\desktop.ini svchost.exe File opened for modification C:\Users\Public\Videos\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Desktop\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Contacts\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Downloads\desktop.ini svchost.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Checks SCSI registry key(s) 3 TTPs 4 IoCs
SCSI information is often read in order to detect sandboxing environments.
Processes:
vds.exedescription ioc process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\DISK&VEN_WDC&PROD_WDS100T2B0A\4&215468A5&0&000000 vds.exe Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_WDC&Prod_WDS100T2B0A\4&215468a5&0&000000\FriendlyName vds.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\CDROM&VEN_QEMU&PROD_QEMU_DVD-ROM\4&215468A5&0&010000 vds.exe Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\CdRom&Ven_QEMU&Prod_QEMU_DVD-ROM\4&215468a5&0&010000\FriendlyName vds.exe -
Interacts with shadow copies 3 TTPs 1 IoCs
Shadow copies are often targeted by ransomware to inhibit system recovery.
Processes:
vssadmin.exepid process 764 vssadmin.exe -
Modifies registry class 1 IoCs
Processes:
svchost.exedescription ioc process Key created \REGISTRY\USER\S-1-5-21-2170637797-568393320-3232933035-1000_Classes\Local Settings svchost.exe -
Opens file in notepad (likely ransom note) 1 IoCs
Processes:
NOTEPAD.EXEpid process 3092 NOTEPAD.EXE -
Suspicious behavior: AddClipboardFormatListener 1 IoCs
Processes:
svchost.exepid process 4564 svchost.exe -
Suspicious behavior: EnumeratesProcesses 47 IoCs
Processes:
8255e2d4929a77203721d93e3945e5cbf1fcaf3c2fe052b7cd18a5e0846e0dfe.exesvchost.exepid process 1652 8255e2d4929a77203721d93e3945e5cbf1fcaf3c2fe052b7cd18a5e0846e0dfe.exe 1652 8255e2d4929a77203721d93e3945e5cbf1fcaf3c2fe052b7cd18a5e0846e0dfe.exe 1652 8255e2d4929a77203721d93e3945e5cbf1fcaf3c2fe052b7cd18a5e0846e0dfe.exe 1652 8255e2d4929a77203721d93e3945e5cbf1fcaf3c2fe052b7cd18a5e0846e0dfe.exe 1652 8255e2d4929a77203721d93e3945e5cbf1fcaf3c2fe052b7cd18a5e0846e0dfe.exe 1652 8255e2d4929a77203721d93e3945e5cbf1fcaf3c2fe052b7cd18a5e0846e0dfe.exe 1652 8255e2d4929a77203721d93e3945e5cbf1fcaf3c2fe052b7cd18a5e0846e0dfe.exe 1652 8255e2d4929a77203721d93e3945e5cbf1fcaf3c2fe052b7cd18a5e0846e0dfe.exe 1652 8255e2d4929a77203721d93e3945e5cbf1fcaf3c2fe052b7cd18a5e0846e0dfe.exe 1652 8255e2d4929a77203721d93e3945e5cbf1fcaf3c2fe052b7cd18a5e0846e0dfe.exe 1652 8255e2d4929a77203721d93e3945e5cbf1fcaf3c2fe052b7cd18a5e0846e0dfe.exe 1652 8255e2d4929a77203721d93e3945e5cbf1fcaf3c2fe052b7cd18a5e0846e0dfe.exe 1652 8255e2d4929a77203721d93e3945e5cbf1fcaf3c2fe052b7cd18a5e0846e0dfe.exe 1652 8255e2d4929a77203721d93e3945e5cbf1fcaf3c2fe052b7cd18a5e0846e0dfe.exe 1652 8255e2d4929a77203721d93e3945e5cbf1fcaf3c2fe052b7cd18a5e0846e0dfe.exe 1652 8255e2d4929a77203721d93e3945e5cbf1fcaf3c2fe052b7cd18a5e0846e0dfe.exe 1652 8255e2d4929a77203721d93e3945e5cbf1fcaf3c2fe052b7cd18a5e0846e0dfe.exe 1652 8255e2d4929a77203721d93e3945e5cbf1fcaf3c2fe052b7cd18a5e0846e0dfe.exe 1652 8255e2d4929a77203721d93e3945e5cbf1fcaf3c2fe052b7cd18a5e0846e0dfe.exe 1652 8255e2d4929a77203721d93e3945e5cbf1fcaf3c2fe052b7cd18a5e0846e0dfe.exe 1652 8255e2d4929a77203721d93e3945e5cbf1fcaf3c2fe052b7cd18a5e0846e0dfe.exe 1652 8255e2d4929a77203721d93e3945e5cbf1fcaf3c2fe052b7cd18a5e0846e0dfe.exe 1652 8255e2d4929a77203721d93e3945e5cbf1fcaf3c2fe052b7cd18a5e0846e0dfe.exe 4564 svchost.exe 4564 svchost.exe 4564 svchost.exe 4564 svchost.exe 4564 svchost.exe 4564 svchost.exe 4564 svchost.exe 4564 svchost.exe 4564 svchost.exe 4564 svchost.exe 4564 svchost.exe 4564 svchost.exe 4564 svchost.exe 4564 svchost.exe 4564 svchost.exe 4564 svchost.exe 4564 svchost.exe 4564 svchost.exe 4564 svchost.exe 4564 svchost.exe 4564 svchost.exe 4564 svchost.exe 4564 svchost.exe 4564 svchost.exe -
Suspicious use of AdjustPrivilegeToken 50 IoCs
Processes:
8255e2d4929a77203721d93e3945e5cbf1fcaf3c2fe052b7cd18a5e0846e0dfe.exesvchost.exevssvc.exeWMIC.exewbengine.exedescription pid process Token: SeDebugPrivilege 1652 8255e2d4929a77203721d93e3945e5cbf1fcaf3c2fe052b7cd18a5e0846e0dfe.exe Token: SeDebugPrivilege 4564 svchost.exe Token: SeBackupPrivilege 2300 vssvc.exe Token: SeRestorePrivilege 2300 vssvc.exe Token: SeAuditPrivilege 2300 vssvc.exe Token: SeIncreaseQuotaPrivilege 3956 WMIC.exe Token: SeSecurityPrivilege 3956 WMIC.exe Token: SeTakeOwnershipPrivilege 3956 WMIC.exe Token: SeLoadDriverPrivilege 3956 WMIC.exe Token: SeSystemProfilePrivilege 3956 WMIC.exe Token: SeSystemtimePrivilege 3956 WMIC.exe Token: SeProfSingleProcessPrivilege 3956 WMIC.exe Token: SeIncBasePriorityPrivilege 3956 WMIC.exe Token: SeCreatePagefilePrivilege 3956 WMIC.exe Token: SeBackupPrivilege 3956 WMIC.exe Token: SeRestorePrivilege 3956 WMIC.exe Token: SeShutdownPrivilege 3956 WMIC.exe Token: SeDebugPrivilege 3956 WMIC.exe Token: SeSystemEnvironmentPrivilege 3956 WMIC.exe Token: SeRemoteShutdownPrivilege 3956 WMIC.exe Token: SeUndockPrivilege 3956 WMIC.exe Token: SeManageVolumePrivilege 3956 WMIC.exe Token: 33 3956 WMIC.exe Token: 34 3956 WMIC.exe Token: 35 3956 WMIC.exe Token: 36 3956 WMIC.exe Token: SeIncreaseQuotaPrivilege 3956 WMIC.exe Token: SeSecurityPrivilege 3956 WMIC.exe Token: SeTakeOwnershipPrivilege 3956 WMIC.exe Token: SeLoadDriverPrivilege 3956 WMIC.exe Token: SeSystemProfilePrivilege 3956 WMIC.exe Token: SeSystemtimePrivilege 3956 WMIC.exe Token: SeProfSingleProcessPrivilege 3956 WMIC.exe Token: SeIncBasePriorityPrivilege 3956 WMIC.exe Token: SeCreatePagefilePrivilege 3956 WMIC.exe Token: SeBackupPrivilege 3956 WMIC.exe Token: SeRestorePrivilege 3956 WMIC.exe Token: SeShutdownPrivilege 3956 WMIC.exe Token: SeDebugPrivilege 3956 WMIC.exe Token: SeSystemEnvironmentPrivilege 3956 WMIC.exe Token: SeRemoteShutdownPrivilege 3956 WMIC.exe Token: SeUndockPrivilege 3956 WMIC.exe Token: SeManageVolumePrivilege 3956 WMIC.exe Token: 33 3956 WMIC.exe Token: 34 3956 WMIC.exe Token: 35 3956 WMIC.exe Token: 36 3956 WMIC.exe Token: SeBackupPrivilege 1456 wbengine.exe Token: SeRestorePrivilege 1456 wbengine.exe Token: SeSecurityPrivilege 1456 wbengine.exe -
Suspicious use of WriteProcessMemory 20 IoCs
Processes:
8255e2d4929a77203721d93e3945e5cbf1fcaf3c2fe052b7cd18a5e0846e0dfe.exesvchost.execmd.execmd.execmd.exedescription pid process target process PID 1652 wrote to memory of 4564 1652 8255e2d4929a77203721d93e3945e5cbf1fcaf3c2fe052b7cd18a5e0846e0dfe.exe svchost.exe PID 1652 wrote to memory of 4564 1652 8255e2d4929a77203721d93e3945e5cbf1fcaf3c2fe052b7cd18a5e0846e0dfe.exe svchost.exe PID 4564 wrote to memory of 4952 4564 svchost.exe cmd.exe PID 4564 wrote to memory of 4952 4564 svchost.exe cmd.exe PID 4952 wrote to memory of 764 4952 cmd.exe vssadmin.exe PID 4952 wrote to memory of 764 4952 cmd.exe vssadmin.exe PID 4952 wrote to memory of 3956 4952 cmd.exe WMIC.exe PID 4952 wrote to memory of 3956 4952 cmd.exe WMIC.exe PID 4564 wrote to memory of 4000 4564 svchost.exe cmd.exe PID 4564 wrote to memory of 4000 4564 svchost.exe cmd.exe PID 4000 wrote to memory of 2748 4000 cmd.exe bcdedit.exe PID 4000 wrote to memory of 2748 4000 cmd.exe bcdedit.exe PID 4000 wrote to memory of 2076 4000 cmd.exe bcdedit.exe PID 4000 wrote to memory of 2076 4000 cmd.exe bcdedit.exe PID 4564 wrote to memory of 3740 4564 svchost.exe cmd.exe PID 4564 wrote to memory of 3740 4564 svchost.exe cmd.exe PID 3740 wrote to memory of 4740 3740 cmd.exe wbadmin.exe PID 3740 wrote to memory of 4740 3740 cmd.exe wbadmin.exe PID 4564 wrote to memory of 3092 4564 svchost.exe NOTEPAD.EXE PID 4564 wrote to memory of 3092 4564 svchost.exe NOTEPAD.EXE -
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\8255e2d4929a77203721d93e3945e5cbf1fcaf3c2fe052b7cd18a5e0846e0dfe.exe"C:\Users\Admin\AppData\Local\Temp\8255e2d4929a77203721d93e3945e5cbf1fcaf3c2fe052b7cd18a5e0846e0dfe.exe"1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1652 -
C:\Users\Admin\AppData\Roaming\svchost.exe"C:\Users\Admin\AppData\Roaming\svchost.exe"2⤵
- Checks computer location settings
- Drops startup file
- Executes dropped EXE
- Drops desktop.ini file(s)
- Modifies registry class
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4564 -
C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C vssadmin delete shadows /all /quiet & wmic shadowcopy delete3⤵
- Suspicious use of WriteProcessMemory
PID:4952 -
C:\Windows\system32\vssadmin.exevssadmin delete shadows /all /quiet4⤵
- Interacts with shadow copies
PID:764 -
C:\Windows\System32\Wbem\WMIC.exewmic shadowcopy delete4⤵
- Suspicious use of AdjustPrivilegeToken
PID:3956 -
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:4000 -
C:\Windows\system32\bcdedit.exebcdedit /set {default} bootstatuspolicy ignoreallfailures4⤵
- Modifies boot configuration data using bcdedit
PID:2748 -
C:\Windows\system32\bcdedit.exebcdedit /set {default} recoveryenabled no4⤵
- Modifies boot configuration data using bcdedit
PID:2076 -
C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet3⤵
- Suspicious use of WriteProcessMemory
PID:3740 -
C:\Windows\system32\wbadmin.exewbadmin delete catalog -quiet4⤵
- Deletes backup catalog
PID:4740 -
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:3092
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C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --field-trial-handle=4160,i,4356837537417149674,16553092232944545509,262144 --variations-seed-version --mojo-platform-channel-handle=1412 /prefetch:81⤵PID:4384
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2300
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C:\Windows\system32\wbengine.exe"C:\Windows\system32\wbengine.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1456
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C:\Windows\System32\vdsldr.exeC:\Windows\System32\vdsldr.exe -Embedding1⤵PID:2788
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C:\Windows\System32\vds.exeC:\Windows\System32\vds.exe1⤵
- Checks SCSI registry key(s)
PID:2060
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
21KB
MD514d1c2327c5bdde7656b7535f7936d92
SHA120c05343aff8bc0661aa928c26bee1146ee7f454
SHA2568255e2d4929a77203721d93e3945e5cbf1fcaf3c2fe052b7cd18a5e0846e0dfe
SHA512195a525d09c977fa05acf5ac6eb7fc5690e83879555137c20838facf74bf7248ef15af2a2298e7bb02dc98e6bc61b37a6f11d8f7a0d4d7182447ac400d8618d9
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Filesize
15B
MD5f80d41ba30a3302ce7695fb00847b7b1
SHA1d49f02c98e7577e5c405437350c2b0e66ae11a54
SHA2561132f98b986f4ce354f5f68e7d67f1d780e4d1ff414ec08d2896b06b1fee7d36
SHA51253bd9dd8a457459d6936599260ddd0f88914b4e681324dad34cd8bc63e532d936e397e286bdf3f3f4b02dc7556cbacf559ecd5d739d29c9c1380321203fef8ae