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Analysis
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max time kernel
28s -
max time network
31s -
platform
windows7_x64 -
resource
win7-20230220-en -
resource tags
arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system -
submitted
09/05/2023, 03:14
Behavioral task
behavioral1
Sample
2023-05-08_ffdefa247d3bb4429558e8b334f4f2ae_wannacry.exe
Resource
win7-20230220-en
Behavioral task
behavioral2
Sample
2023-05-08_ffdefa247d3bb4429558e8b334f4f2ae_wannacry.exe
Resource
win10v2004-20230220-en
General
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Target
2023-05-08_ffdefa247d3bb4429558e8b334f4f2ae_wannacry.exe
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Size
341KB
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MD5
ffdefa247d3bb4429558e8b334f4f2ae
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SHA1
af9f3af31889b55552a5721244184d0a115be74c
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SHA256
542c157186bae766dd3e2df424e9c25251d71086b99cc9df121bc9bf50462688
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SHA512
0f4b5534179a690bbaa5333fbf4b11e881d2b60c37f3ade95ebf6b481bbf58b76a17bf4945883babadd8b5b9681c4710ddb2ab4380cd27cf73430e8609d0b9d7
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SSDEEP
6144:Drbwc9N+fwvDIK9LpXXXXXXXXXXXXXXXXQGuFFM5:dWwbLpXXXXXXXXXXXXXXXX5uw5
Malware Config
Extracted
C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Crashpad\read_it.txt
chaos
Signatures
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Chaos
Ransomware family first seen in June 2021.
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Chaos Ransomware 4 IoCs
resource yara_rule behavioral1/memory/1340-54-0x0000000000EF0000-0x0000000000F4C000-memory.dmp family_chaos behavioral1/files/0x00090000000134bf-58.dat family_chaos behavioral1/memory/932-60-0x0000000000DF0000-0x0000000000E4C000-memory.dmp family_chaos behavioral1/files/0x00090000000134bf-59.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 1364 bcdedit.exe 1616 bcdedit.exe -
pid Process 996 wbadmin.exe -
Disables Task Manager via registry modification
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Modifies extensions of user files 4 IoCs
Ransomware generally changes the extension on encrypted files.
description ioc Process File created C:\Users\Admin\Pictures\ConnectMerge.png.encryp svchost.exe File opened for modification C:\Users\Admin\Pictures\ConnectMerge.png.encryp svchost.exe File created C:\Users\Admin\Pictures\RequestPing.raw.encryp svchost.exe File opened for modification C:\Users\Admin\Pictures\RequestPing.raw.encryp svchost.exe -
Drops startup file 3 IoCs
description 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
pid Process 932 svchost.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\Admin\AppData\Local\Microsoft\Feeds Cache\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\Default\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\desktop.ini svchost.exe File opened for modification C:\Users\Public\Libraries\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Music\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Videos\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\Public\Recorded TV\Sample Media\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\F9XZZTVM\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\Burn\Burn\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\All Users\Microsoft\Windows\Start Menu\Programs\Accessories\System Tools\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\Public\Downloads\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\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\2STIOPZK\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\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Administrative Tools\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\KDJSR44L\desktop.ini svchost.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\FPRRZWTM\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\Favorites\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Favorites\Links\desktop.ini svchost.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\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\Links\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\Admin\AppData\Local\Microsoft\Feeds Cache\D3FFX6WH\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\Start Menu\Programs\Accessories\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\Public\Music\Sample Music\desktop.ini svchost.exe File opened for modification C:\Users\Public\Videos\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\D3BHGYNU\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\9M3HSS2N\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\Roaming\Microsoft\Windows\Start Menu\Programs\Maintenance\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\All Users\Microsoft\Windows\Start Menu\Programs\Startup\desktop.ini svchost.exe File opened for modification C:\Users\Public\Documents\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\All Users\Microsoft\Windows\Start Menu\Programs\Accessories\Windows PowerShell\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\Public\Music\desktop.ini svchost.exe File opened for modification C:\Users\Public\Recorded TV\desktop.ini svchost.exe File opened for modification C:\Users\Public\Videos\Sample Videos\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\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\ZTIFN44A\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\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\Libraries\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Accessibility\Desktop.ini svchost.exe File opened for modification C:\Users\Admin\Desktop\desktop.ini svchost.exe File opened for modification C:\Users\Public\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Contacts\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Saved Games\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\All Users\Microsoft\Windows\Start Menu\Programs\Games\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\Default\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\System Tools\Desktop.ini svchost.exe File opened for modification C:\Users\Public\Pictures\desktop.ini svchost.exe -
Sets desktop wallpaper using registry 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-2647223082-2067913677-935928954-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\gu81z4gwn.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 2 TTPs 1 IoCs
Shadow copies are often targeted by ransomware to inhibit system recovery.
pid Process 552 vssadmin.exe -
Opens file in notepad (likely ransom note) 1 IoCs
pid Process 1496 NOTEPAD.EXE -
Suspicious behavior: AddClipboardFormatListener 1 IoCs
pid Process 932 svchost.exe -
Suspicious behavior: EnumeratesProcesses 3 IoCs
pid Process 1340 2023-05-08_ffdefa247d3bb4429558e8b334f4f2ae_wannacry.exe 932 svchost.exe 932 svchost.exe -
Suspicious use of AdjustPrivilegeToken 48 IoCs
description pid Process Token: SeDebugPrivilege 1340 2023-05-08_ffdefa247d3bb4429558e8b334f4f2ae_wannacry.exe Token: SeDebugPrivilege 932 svchost.exe Token: SeBackupPrivilege 2024 vssvc.exe Token: SeRestorePrivilege 2024 vssvc.exe Token: SeAuditPrivilege 2024 vssvc.exe Token: SeIncreaseQuotaPrivilege 1588 WMIC.exe Token: SeSecurityPrivilege 1588 WMIC.exe Token: SeTakeOwnershipPrivilege 1588 WMIC.exe Token: SeLoadDriverPrivilege 1588 WMIC.exe Token: SeSystemProfilePrivilege 1588 WMIC.exe Token: SeSystemtimePrivilege 1588 WMIC.exe Token: SeProfSingleProcessPrivilege 1588 WMIC.exe Token: SeIncBasePriorityPrivilege 1588 WMIC.exe Token: SeCreatePagefilePrivilege 1588 WMIC.exe Token: SeBackupPrivilege 1588 WMIC.exe Token: SeRestorePrivilege 1588 WMIC.exe Token: SeShutdownPrivilege 1588 WMIC.exe Token: SeDebugPrivilege 1588 WMIC.exe Token: SeSystemEnvironmentPrivilege 1588 WMIC.exe Token: SeRemoteShutdownPrivilege 1588 WMIC.exe Token: SeUndockPrivilege 1588 WMIC.exe Token: SeManageVolumePrivilege 1588 WMIC.exe Token: 33 1588 WMIC.exe Token: 34 1588 WMIC.exe Token: 35 1588 WMIC.exe Token: SeIncreaseQuotaPrivilege 1588 WMIC.exe Token: SeSecurityPrivilege 1588 WMIC.exe Token: SeTakeOwnershipPrivilege 1588 WMIC.exe Token: SeLoadDriverPrivilege 1588 WMIC.exe Token: SeSystemProfilePrivilege 1588 WMIC.exe Token: SeSystemtimePrivilege 1588 WMIC.exe Token: SeProfSingleProcessPrivilege 1588 WMIC.exe Token: SeIncBasePriorityPrivilege 1588 WMIC.exe Token: SeCreatePagefilePrivilege 1588 WMIC.exe Token: SeBackupPrivilege 1588 WMIC.exe Token: SeRestorePrivilege 1588 WMIC.exe Token: SeShutdownPrivilege 1588 WMIC.exe Token: SeDebugPrivilege 1588 WMIC.exe Token: SeSystemEnvironmentPrivilege 1588 WMIC.exe Token: SeRemoteShutdownPrivilege 1588 WMIC.exe Token: SeUndockPrivilege 1588 WMIC.exe Token: SeManageVolumePrivilege 1588 WMIC.exe Token: 33 1588 WMIC.exe Token: 34 1588 WMIC.exe Token: 35 1588 WMIC.exe Token: SeBackupPrivilege 1628 wbengine.exe Token: SeRestorePrivilege 1628 wbengine.exe Token: SeSecurityPrivilege 1628 wbengine.exe -
Suspicious use of WriteProcessMemory 30 IoCs
description pid Process procid_target PID 1340 wrote to memory of 932 1340 2023-05-08_ffdefa247d3bb4429558e8b334f4f2ae_wannacry.exe 28 PID 1340 wrote to memory of 932 1340 2023-05-08_ffdefa247d3bb4429558e8b334f4f2ae_wannacry.exe 28 PID 1340 wrote to memory of 932 1340 2023-05-08_ffdefa247d3bb4429558e8b334f4f2ae_wannacry.exe 28 PID 932 wrote to memory of 1492 932 svchost.exe 29 PID 932 wrote to memory of 1492 932 svchost.exe 29 PID 932 wrote to memory of 1492 932 svchost.exe 29 PID 1492 wrote to memory of 552 1492 cmd.exe 31 PID 1492 wrote to memory of 552 1492 cmd.exe 31 PID 1492 wrote to memory of 552 1492 cmd.exe 31 PID 1492 wrote to memory of 1588 1492 cmd.exe 34 PID 1492 wrote to memory of 1588 1492 cmd.exe 34 PID 1492 wrote to memory of 1588 1492 cmd.exe 34 PID 932 wrote to memory of 1668 932 svchost.exe 36 PID 932 wrote to memory of 1668 932 svchost.exe 36 PID 932 wrote to memory of 1668 932 svchost.exe 36 PID 1668 wrote to memory of 1364 1668 cmd.exe 38 PID 1668 wrote to memory of 1364 1668 cmd.exe 38 PID 1668 wrote to memory of 1364 1668 cmd.exe 38 PID 1668 wrote to memory of 1616 1668 cmd.exe 39 PID 1668 wrote to memory of 1616 1668 cmd.exe 39 PID 1668 wrote to memory of 1616 1668 cmd.exe 39 PID 932 wrote to memory of 600 932 svchost.exe 40 PID 932 wrote to memory of 600 932 svchost.exe 40 PID 932 wrote to memory of 600 932 svchost.exe 40 PID 600 wrote to memory of 996 600 cmd.exe 42 PID 600 wrote to memory of 996 600 cmd.exe 42 PID 600 wrote to memory of 996 600 cmd.exe 42 PID 932 wrote to memory of 1496 932 svchost.exe 47 PID 932 wrote to memory of 1496 932 svchost.exe 47 PID 932 wrote to memory of 1496 932 svchost.exe 47 -
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\2023-05-08_ffdefa247d3bb4429558e8b334f4f2ae_wannacry.exe"C:\Users\Admin\AppData\Local\Temp\2023-05-08_ffdefa247d3bb4429558e8b334f4f2ae_wannacry.exe"1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1340 -
C:\Users\Admin\AppData\Roaming\svchost.exe"C:\Users\Admin\AppData\Roaming\svchost.exe"2⤵
- Modifies extensions of user files
- 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:932 -
C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C vssadmin delete shadows /all /quiet & wmic shadowcopy delete3⤵
- Suspicious use of WriteProcessMemory
PID:1492 -
C:\Windows\system32\vssadmin.exevssadmin delete shadows /all /quiet4⤵
- Interacts with shadow copies
PID:552
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C:\Windows\System32\Wbem\WMIC.exewmic shadowcopy delete4⤵
- Suspicious use of AdjustPrivilegeToken
PID:1588
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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:1668 -
C:\Windows\system32\bcdedit.exebcdedit /set {default} bootstatuspolicy ignoreallfailures4⤵
- Modifies boot configuration data using bcdedit
PID:1364
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C:\Windows\system32\bcdedit.exebcdedit /set {default} recoveryenabled no4⤵
- Modifies boot configuration data using bcdedit
PID:1616
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C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet3⤵
- Suspicious use of WriteProcessMemory
PID:600 -
C:\Windows\system32\wbadmin.exewbadmin delete catalog -quiet4⤵
- Deletes backup catalog
PID:996
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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:1496
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2024
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C:\Windows\system32\wbengine.exe"C:\Windows\system32\wbengine.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1628
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C:\Windows\System32\vdsldr.exeC:\Windows\System32\vdsldr.exe -Embedding1⤵PID:1976
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C:\Windows\System32\vds.exeC:\Windows\System32\vds.exe1⤵PID:1716
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
1B
MD5d1457b72c3fb323a2671125aef3eab5d
SHA15bab61eb53176449e25c2c82f172b82cb13ffb9d
SHA2568a8de823d5ed3e12746a62ef169bcf372be0ca44f0a1236abc35df05d96928e1
SHA512ca63c07ad35d8c9fb0c92d6146759b122d4ec5d3f67ebe2f30ddb69f9e6c9fd3bf31a5e408b08f1d4d9cd68120cced9e57f010bef3cde97653fed5470da7d1a0
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Filesize
964B
MD54217b8b83ce3c3f70029a056546f8fd0
SHA1487cdb5733d073a0427418888e8f7070fe782a03
SHA2567d767e907be373c680d1f7884d779588eb643bebb3f27bf3b5ed4864aa4d8121
SHA5122a58c99fa52f99c276e27eb98aef2ce1205f16d1e37b7e87eb69e9ecda22b578195a43f1a7f70fead6ba70421abf2f85c917551c191536eaf1f3011d3d24f740
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Filesize
341KB
MD5ffdefa247d3bb4429558e8b334f4f2ae
SHA1af9f3af31889b55552a5721244184d0a115be74c
SHA256542c157186bae766dd3e2df424e9c25251d71086b99cc9df121bc9bf50462688
SHA5120f4b5534179a690bbaa5333fbf4b11e881d2b60c37f3ade95ebf6b481bbf58b76a17bf4945883babadd8b5b9681c4710ddb2ab4380cd27cf73430e8609d0b9d7
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Filesize
341KB
MD5ffdefa247d3bb4429558e8b334f4f2ae
SHA1af9f3af31889b55552a5721244184d0a115be74c
SHA256542c157186bae766dd3e2df424e9c25251d71086b99cc9df121bc9bf50462688
SHA5120f4b5534179a690bbaa5333fbf4b11e881d2b60c37f3ade95ebf6b481bbf58b76a17bf4945883babadd8b5b9681c4710ddb2ab4380cd27cf73430e8609d0b9d7