Analysis
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max time kernel
121s -
max time network
122s -
platform
windows7_x64 -
resource
win7-20240221-en -
resource tags
arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system -
submitted
04/06/2024, 17:24
Behavioral task
behavioral1
Sample
2024-06-04_371a8a942fc1ab34a071005ea9d78cbd_chaos_destroyer_wannacry.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-06-04_371a8a942fc1ab34a071005ea9d78cbd_chaos_destroyer_wannacry.exe
Resource
win10v2004-20240508-en
General
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Target
2024-06-04_371a8a942fc1ab34a071005ea9d78cbd_chaos_destroyer_wannacry.exe
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Size
26KB
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MD5
371a8a942fc1ab34a071005ea9d78cbd
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SHA1
7ed50ff8ad4a685c6bf0e7669b014df12988cd82
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SHA256
2261cf536812c086aae8eb1790dbdfcce0c7a4cc47739be4ff75645da853ce0d
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SHA512
699ce7951725f1b84ba4d8c585d8a4129d8a9c19ab707558d114f06f97501bb6df432c7f459577cc39e1e259672299b1c3d636f199bc3b3801e0e83bdac818fb
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SSDEEP
384:MYenjLLADjQsNaO2ABm4ZrOVp91CvL/zb5TxDGz:LXQsN0Gc9Uz/zbNxDo
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 3 IoCs
resource yara_rule behavioral1/memory/1420-1-0x00000000013C0000-0x00000000013CC000-memory.dmp family_chaos behavioral1/files/0x000c000000014b27-5.dat family_chaos behavioral1/memory/2632-7-0x0000000000AB0000-0x0000000000ABC000-memory.dmp family_chaos -
Deletes shadow copies 3 TTPs
Ransomware often targets backup files to inhibit system recovery.
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Detects command variations typically used by ransomware 3 IoCs
resource yara_rule behavioral1/memory/1420-1-0x00000000013C0000-0x00000000013CC000-memory.dmp INDICATOR_SUSPICIOUS_GENRansomware behavioral1/files/0x000c000000014b27-5.dat INDICATOR_SUSPICIOUS_GENRansomware behavioral1/memory/2632-7-0x0000000000AB0000-0x0000000000ABC000-memory.dmp INDICATOR_SUSPICIOUS_GENRansomware -
Modifies boot configuration data using bcdedit 1 TTPs 2 IoCs
pid Process 2772 bcdedit.exe 2872 bcdedit.exe -
Renames multiple (189) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
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pid Process 2984 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\windosdefender.url windosdefender.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\desktop.ini windosdefender.exe File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\read_it.txt windosdefender.exe -
Executes dropped EXE 1 IoCs
pid Process 2632 windosdefender.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\Favorites\desktop.ini windosdefender.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\Administrative Tools\desktop.ini windosdefender.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\Maintenance\Desktop.ini windosdefender.exe File opened for modification C:\Users\Default\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Maintenance\Desktop.ini windosdefender.exe File opened for modification C:\Users\Public\Libraries\desktop.ini windosdefender.exe File opened for modification C:\Users\Public\Pictures\desktop.ini windosdefender.exe File opened for modification C:\Users\Public\Videos\Sample Videos\desktop.ini windosdefender.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\desktop.ini windosdefender.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\Burn\Burn\desktop.ini windosdefender.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\History\desktop.ini windosdefender.exe File opened for modification C:\Users\Admin\Favorites\Links for United States\desktop.ini windosdefender.exe File opened for modification C:\Users\Admin\Saved Games\desktop.ini windosdefender.exe File opened for modification C:\Users\Default\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Desktop.ini windosdefender.exe File opened for modification C:\Users\Public\Pictures\Sample Pictures\desktop.ini windosdefender.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\desktop.ini windosdefender.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\HUNEJ1HU\desktop.ini windosdefender.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\MG62UP6H\desktop.ini windosdefender.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Libraries\desktop.ini windosdefender.exe File opened for modification C:\Users\Public\Music\Sample Music\desktop.ini windosdefender.exe File opened for modification C:\Users\Public\Recorded TV\desktop.ini windosdefender.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\BB4W7M7Z\desktop.ini windosdefender.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\System Tools\Desktop.ini windosdefender.exe File opened for modification C:\Users\Default\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\System Tools\Desktop.ini windosdefender.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\A9XVYA91\desktop.ini windosdefender.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\desktop.ini windosdefender.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\Accessories\Tablet PC\Desktop.ini windosdefender.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\SendTo\Desktop.ini windosdefender.exe File opened for modification C:\Users\Public\desktop.ini windosdefender.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Administrative Tools\desktop.ini windosdefender.exe File opened for modification C:\Users\Admin\Videos\desktop.ini windosdefender.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\Games\Desktop.ini windosdefender.exe File opened for modification C:\Users\Admin\Desktop\desktop.ini windosdefender.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\desktop.ini windosdefender.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\desktop.ini windosdefender.exe File opened for modification C:\Users\Admin\Searches\desktop.ini windosdefender.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\desktop.ini windosdefender.exe File opened for modification C:\Users\Default\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\desktop.ini windosdefender.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\JWM3U1DD\desktop.ini windosdefender.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\User Pinned\TaskBar\desktop.ini windosdefender.exe File opened for modification C:\Users\Admin\Contacts\desktop.ini windosdefender.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\Accessories\Desktop.ini windosdefender.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\Accessories\Windows PowerShell\desktop.ini windosdefender.exe File opened for modification C:\Users\Default\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Accessibility\Desktop.ini windosdefender.exe File opened for modification C:\Users\Public\Recorded TV\Sample Media\desktop.ini windosdefender.exe File opened for modification C:\Users\Public\Videos\desktop.ini windosdefender.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\EQ2PZD61\desktop.ini windosdefender.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Ringtones\desktop.ini windosdefender.exe File opened for modification C:\Users\Public\Music\desktop.ini windosdefender.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Accessibility\Desktop.ini windosdefender.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\History\History.IE5\desktop.ini windosdefender.exe File opened for modification C:\Users\Admin\Documents\desktop.ini windosdefender.exe File opened for modification C:\Users\Admin\Favorites\Links\desktop.ini windosdefender.exe File opened for modification C:\Users\Default\AppData\Roaming\Microsoft\Windows\SendTo\Desktop.ini windosdefender.exe File opened for modification C:\Users\Public\Downloads\desktop.ini windosdefender.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\2RM92H5V\desktop.ini windosdefender.exe File opened for modification C:\Users\Public\Desktop\desktop.ini windosdefender.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\Accessories\System Tools\Desktop.ini windosdefender.exe File opened for modification C:\Users\Admin\Music\desktop.ini windosdefender.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Desktop.ini windosdefender.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\desktop.ini windosdefender.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Maintenance\Desktop.ini windosdefender.exe File opened for modification C:\Users\Admin\Links\desktop.ini windosdefender.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\Startup\desktop.ini windosdefender.exe File opened for modification F:\$RECYCLE.BIN\S-1-5-21-1298544033-3225604241-2703760938-1000\desktop.ini windosdefender.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 2944 vssadmin.exe -
Opens file in notepad (likely ransom note) 1 IoCs
pid Process 2756 NOTEPAD.EXE -
Suspicious behavior: AddClipboardFormatListener 1 IoCs
pid Process 2632 windosdefender.exe -
Suspicious behavior: EnumeratesProcesses 5 IoCs
pid Process 1420 2024-06-04_371a8a942fc1ab34a071005ea9d78cbd_chaos_destroyer_wannacry.exe 1420 2024-06-04_371a8a942fc1ab34a071005ea9d78cbd_chaos_destroyer_wannacry.exe 2632 windosdefender.exe 2632 windosdefender.exe 2632 windosdefender.exe -
Suspicious use of AdjustPrivilegeToken 48 IoCs
description pid Process Token: SeDebugPrivilege 1420 2024-06-04_371a8a942fc1ab34a071005ea9d78cbd_chaos_destroyer_wannacry.exe Token: SeDebugPrivilege 2632 windosdefender.exe Token: SeBackupPrivilege 2568 vssvc.exe Token: SeRestorePrivilege 2568 vssvc.exe Token: SeAuditPrivilege 2568 vssvc.exe Token: SeIncreaseQuotaPrivilege 2520 WMIC.exe Token: SeSecurityPrivilege 2520 WMIC.exe Token: SeTakeOwnershipPrivilege 2520 WMIC.exe Token: SeLoadDriverPrivilege 2520 WMIC.exe Token: SeSystemProfilePrivilege 2520 WMIC.exe Token: SeSystemtimePrivilege 2520 WMIC.exe Token: SeProfSingleProcessPrivilege 2520 WMIC.exe Token: SeIncBasePriorityPrivilege 2520 WMIC.exe Token: SeCreatePagefilePrivilege 2520 WMIC.exe Token: SeBackupPrivilege 2520 WMIC.exe Token: SeRestorePrivilege 2520 WMIC.exe Token: SeShutdownPrivilege 2520 WMIC.exe Token: SeDebugPrivilege 2520 WMIC.exe Token: SeSystemEnvironmentPrivilege 2520 WMIC.exe Token: SeRemoteShutdownPrivilege 2520 WMIC.exe Token: SeUndockPrivilege 2520 WMIC.exe Token: SeManageVolumePrivilege 2520 WMIC.exe Token: 33 2520 WMIC.exe Token: 34 2520 WMIC.exe Token: 35 2520 WMIC.exe Token: SeIncreaseQuotaPrivilege 2520 WMIC.exe Token: SeSecurityPrivilege 2520 WMIC.exe Token: SeTakeOwnershipPrivilege 2520 WMIC.exe Token: SeLoadDriverPrivilege 2520 WMIC.exe Token: SeSystemProfilePrivilege 2520 WMIC.exe Token: SeSystemtimePrivilege 2520 WMIC.exe Token: SeProfSingleProcessPrivilege 2520 WMIC.exe Token: SeIncBasePriorityPrivilege 2520 WMIC.exe Token: SeCreatePagefilePrivilege 2520 WMIC.exe Token: SeBackupPrivilege 2520 WMIC.exe Token: SeRestorePrivilege 2520 WMIC.exe Token: SeShutdownPrivilege 2520 WMIC.exe Token: SeDebugPrivilege 2520 WMIC.exe Token: SeSystemEnvironmentPrivilege 2520 WMIC.exe Token: SeRemoteShutdownPrivilege 2520 WMIC.exe Token: SeUndockPrivilege 2520 WMIC.exe Token: SeManageVolumePrivilege 2520 WMIC.exe Token: 33 2520 WMIC.exe Token: 34 2520 WMIC.exe Token: 35 2520 WMIC.exe Token: SeBackupPrivilege 2664 wbengine.exe Token: SeRestorePrivilege 2664 wbengine.exe Token: SeSecurityPrivilege 2664 wbengine.exe -
Suspicious use of WriteProcessMemory 30 IoCs
description pid Process procid_target PID 1420 wrote to memory of 2632 1420 2024-06-04_371a8a942fc1ab34a071005ea9d78cbd_chaos_destroyer_wannacry.exe 28 PID 1420 wrote to memory of 2632 1420 2024-06-04_371a8a942fc1ab34a071005ea9d78cbd_chaos_destroyer_wannacry.exe 28 PID 1420 wrote to memory of 2632 1420 2024-06-04_371a8a942fc1ab34a071005ea9d78cbd_chaos_destroyer_wannacry.exe 28 PID 2632 wrote to memory of 2724 2632 windosdefender.exe 29 PID 2632 wrote to memory of 2724 2632 windosdefender.exe 29 PID 2632 wrote to memory of 2724 2632 windosdefender.exe 29 PID 2724 wrote to memory of 2944 2724 cmd.exe 31 PID 2724 wrote to memory of 2944 2724 cmd.exe 31 PID 2724 wrote to memory of 2944 2724 cmd.exe 31 PID 2724 wrote to memory of 2520 2724 cmd.exe 34 PID 2724 wrote to memory of 2520 2724 cmd.exe 34 PID 2724 wrote to memory of 2520 2724 cmd.exe 34 PID 2632 wrote to memory of 2652 2632 windosdefender.exe 36 PID 2632 wrote to memory of 2652 2632 windosdefender.exe 36 PID 2632 wrote to memory of 2652 2632 windosdefender.exe 36 PID 2652 wrote to memory of 2772 2652 cmd.exe 38 PID 2652 wrote to memory of 2772 2652 cmd.exe 38 PID 2652 wrote to memory of 2772 2652 cmd.exe 38 PID 2652 wrote to memory of 2872 2652 cmd.exe 39 PID 2652 wrote to memory of 2872 2652 cmd.exe 39 PID 2652 wrote to memory of 2872 2652 cmd.exe 39 PID 2632 wrote to memory of 2532 2632 windosdefender.exe 40 PID 2632 wrote to memory of 2532 2632 windosdefender.exe 40 PID 2632 wrote to memory of 2532 2632 windosdefender.exe 40 PID 2532 wrote to memory of 2984 2532 cmd.exe 42 PID 2532 wrote to memory of 2984 2532 cmd.exe 42 PID 2532 wrote to memory of 2984 2532 cmd.exe 42 PID 2632 wrote to memory of 2756 2632 windosdefender.exe 48 PID 2632 wrote to memory of 2756 2632 windosdefender.exe 48 PID 2632 wrote to memory of 2756 2632 windosdefender.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\2024-06-04_371a8a942fc1ab34a071005ea9d78cbd_chaos_destroyer_wannacry.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-04_371a8a942fc1ab34a071005ea9d78cbd_chaos_destroyer_wannacry.exe"1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1420 -
C:\Users\Admin\AppData\Roaming\windosdefender.exe"C:\Users\Admin\AppData\Roaming\windosdefender.exe"2⤵
- Drops startup file
- Executes dropped EXE
- Drops desktop.ini file(s)
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2632 -
C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C vssadmin delete shadows /all /quiet & wmic shadowcopy delete3⤵
- Suspicious use of WriteProcessMemory
PID:2724 -
C:\Windows\system32\vssadmin.exevssadmin delete shadows /all /quiet4⤵
- Interacts with shadow copies
PID:2944
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C:\Windows\System32\Wbem\WMIC.exewmic shadowcopy delete4⤵
- Suspicious use of AdjustPrivilegeToken
PID:2520
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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:2652 -
C:\Windows\system32\bcdedit.exebcdedit /set {default} bootstatuspolicy ignoreallfailures4⤵
- Modifies boot configuration data using bcdedit
PID:2772
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C:\Windows\system32\bcdedit.exebcdedit /set {default} recoveryenabled no4⤵
- Modifies boot configuration data using bcdedit
PID:2872
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C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet3⤵
- Suspicious use of WriteProcessMemory
PID:2532 -
C:\Windows\system32\wbadmin.exewbadmin delete catalog -quiet4⤵
- Deletes backup catalog
PID:2984
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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:2756
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2568
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C:\Windows\system32\wbengine.exe"C:\Windows\system32\wbengine.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2664
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C:\Windows\System32\vdsldr.exeC:\Windows\System32\vdsldr.exe -Embedding1⤵PID:1704
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C:\Windows\System32\vds.exeC:\Windows\System32\vds.exe1⤵PID:2648
Network
MITRE ATT&CK Enterprise v15
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
26KB
MD5371a8a942fc1ab34a071005ea9d78cbd
SHA17ed50ff8ad4a685c6bf0e7669b014df12988cd82
SHA2562261cf536812c086aae8eb1790dbdfcce0c7a4cc47739be4ff75645da853ce0d
SHA512699ce7951725f1b84ba4d8c585d8a4129d8a9c19ab707558d114f06f97501bb6df432c7f459577cc39e1e259672299b1c3d636f199bc3b3801e0e83bdac818fb