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Analysis
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max time kernel
121s -
max time network
122s -
platform
windows7_x64 -
resource
win7-20240903-en -
resource tags
arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system -
submitted
17/01/2025, 18:50
Behavioral task
behavioral1
Sample
2025-01-17_ef76a31c46645c5b34b3560d6a92914e_chaos_destroyer_wannacry.exe
Resource
win7-20240903-en
Behavioral task
behavioral2
Sample
2025-01-17_ef76a31c46645c5b34b3560d6a92914e_chaos_destroyer_wannacry.exe
Resource
win10v2004-20241007-en
General
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Target
2025-01-17_ef76a31c46645c5b34b3560d6a92914e_chaos_destroyer_wannacry.exe
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Size
26KB
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MD5
ef76a31c46645c5b34b3560d6a92914e
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SHA1
2867d691fe4ca452ffde1e015a4d7bb1b0d9fefd
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SHA256
f479b0a9e483856b47189e03f4c9a6f07cd9ee04f3aa494160134a03ac5526f6
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SHA512
a5ad94a2b7841be2bf23b413c15dc57c6cb196a79fa2cac8ceb607e30934a004caa579e90cae166825ad400d890573bf41ee7483d3300a5de8a2dc812181ec0e
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SSDEEP
384:qYenjLLAG9rPOB+Xvzb/xqwbOVp91W01Ib5oxDGSU:5+ru+7tc9RIb6xD9U
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/2316-1-0x0000000000D10000-0x0000000000D1C000-memory.dmp family_chaos behavioral1/files/0x0008000000012117-6.dat family_chaos behavioral1/memory/2844-7-0x00000000001E0000-0x00000000001EC000-memory.dmp 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 2124 bcdedit.exe 2144 bcdedit.exe -
pid Process 2964 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\svchost.url svchost.exe 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 2844 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) 64 IoCs
description ioc Process File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\39RANI6K\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\Accessories\System Tools\Desktop.ini svchost.exe File opened for modification C:\Users\Admin\Contacts\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Desktop\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\SendTo\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\Feeds Cache\QMPQWRBT\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Favorites\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Searches\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\Default\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Desktop.ini svchost.exe File opened for modification C:\Users\Public\Documents\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\Default\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Accessibility\Desktop.ini svchost.exe File opened for modification F:\$RECYCLE.BIN\S-1-5-21-3063565911-2056067323-3330884624-1000\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\Saved Games\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\Default\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\desktop.ini svchost.exe File opened for modification C:\Users\Public\Music\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\AppData\Local\Microsoft\Feeds Cache\AQYH36ZT\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\Recent\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Music\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\Recorded TV\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\All Users\Microsoft\Windows\Start Menu\Programs\Startup\desktop.ini svchost.exe File opened for modification C:\Users\Public\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\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\BY17T927\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\Windows\SendTo\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\Public\Pictures\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\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\All Users\Microsoft\Windows\Start Menu\Programs\Maintenance\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\Windows\History\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\MT4W94IX\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\Programs\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\T1DP8V76\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\All Users\Microsoft\Windows\Start Menu\Programs\Accessories\Desktop.ini svchost.exe File opened for modification C:\Users\Admin\Pictures\desktop.ini svchost.exe File opened for modification C:\Users\Public\Desktop\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\UGWF8QWZ\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\All Users\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\Administrative Tools\desktop.ini svchost.exe File opened for modification C:\Users\Public\Downloads\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\Local\Microsoft\Feeds Cache\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\U3EGUGI8\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\Programs\Accessories\Accessibility\Desktop.ini 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 1224 vssadmin.exe -
Opens file in notepad (likely ransom note) 1 IoCs
pid Process 2220 NOTEPAD.EXE -
Suspicious behavior: AddClipboardFormatListener 1 IoCs
pid Process 2844 svchost.exe -
Suspicious behavior: EnumeratesProcesses 7 IoCs
pid Process 2316 2025-01-17_ef76a31c46645c5b34b3560d6a92914e_chaos_destroyer_wannacry.exe 2316 2025-01-17_ef76a31c46645c5b34b3560d6a92914e_chaos_destroyer_wannacry.exe 2316 2025-01-17_ef76a31c46645c5b34b3560d6a92914e_chaos_destroyer_wannacry.exe 2844 svchost.exe 2844 svchost.exe 2844 svchost.exe 2844 svchost.exe -
Suspicious use of AdjustPrivilegeToken 48 IoCs
description pid Process Token: SeDebugPrivilege 2316 2025-01-17_ef76a31c46645c5b34b3560d6a92914e_chaos_destroyer_wannacry.exe Token: SeDebugPrivilege 2844 svchost.exe Token: SeBackupPrivilege 1708 vssvc.exe Token: SeRestorePrivilege 1708 vssvc.exe Token: SeAuditPrivilege 1708 vssvc.exe Token: SeIncreaseQuotaPrivilege 1212 WMIC.exe Token: SeSecurityPrivilege 1212 WMIC.exe Token: SeTakeOwnershipPrivilege 1212 WMIC.exe Token: SeLoadDriverPrivilege 1212 WMIC.exe Token: SeSystemProfilePrivilege 1212 WMIC.exe Token: SeSystemtimePrivilege 1212 WMIC.exe Token: SeProfSingleProcessPrivilege 1212 WMIC.exe Token: SeIncBasePriorityPrivilege 1212 WMIC.exe Token: SeCreatePagefilePrivilege 1212 WMIC.exe Token: SeBackupPrivilege 1212 WMIC.exe Token: SeRestorePrivilege 1212 WMIC.exe Token: SeShutdownPrivilege 1212 WMIC.exe Token: SeDebugPrivilege 1212 WMIC.exe Token: SeSystemEnvironmentPrivilege 1212 WMIC.exe Token: SeRemoteShutdownPrivilege 1212 WMIC.exe Token: SeUndockPrivilege 1212 WMIC.exe Token: SeManageVolumePrivilege 1212 WMIC.exe Token: 33 1212 WMIC.exe Token: 34 1212 WMIC.exe Token: 35 1212 WMIC.exe Token: SeIncreaseQuotaPrivilege 1212 WMIC.exe Token: SeSecurityPrivilege 1212 WMIC.exe Token: SeTakeOwnershipPrivilege 1212 WMIC.exe Token: SeLoadDriverPrivilege 1212 WMIC.exe Token: SeSystemProfilePrivilege 1212 WMIC.exe Token: SeSystemtimePrivilege 1212 WMIC.exe Token: SeProfSingleProcessPrivilege 1212 WMIC.exe Token: SeIncBasePriorityPrivilege 1212 WMIC.exe Token: SeCreatePagefilePrivilege 1212 WMIC.exe Token: SeBackupPrivilege 1212 WMIC.exe Token: SeRestorePrivilege 1212 WMIC.exe Token: SeShutdownPrivilege 1212 WMIC.exe Token: SeDebugPrivilege 1212 WMIC.exe Token: SeSystemEnvironmentPrivilege 1212 WMIC.exe Token: SeRemoteShutdownPrivilege 1212 WMIC.exe Token: SeUndockPrivilege 1212 WMIC.exe Token: SeManageVolumePrivilege 1212 WMIC.exe Token: 33 1212 WMIC.exe Token: 34 1212 WMIC.exe Token: 35 1212 WMIC.exe Token: SeBackupPrivilege 2924 wbengine.exe Token: SeRestorePrivilege 2924 wbengine.exe Token: SeSecurityPrivilege 2924 wbengine.exe -
Suspicious use of WriteProcessMemory 30 IoCs
description pid Process procid_target PID 2316 wrote to memory of 2844 2316 2025-01-17_ef76a31c46645c5b34b3560d6a92914e_chaos_destroyer_wannacry.exe 30 PID 2316 wrote to memory of 2844 2316 2025-01-17_ef76a31c46645c5b34b3560d6a92914e_chaos_destroyer_wannacry.exe 30 PID 2316 wrote to memory of 2844 2316 2025-01-17_ef76a31c46645c5b34b3560d6a92914e_chaos_destroyer_wannacry.exe 30 PID 2844 wrote to memory of 2704 2844 svchost.exe 31 PID 2844 wrote to memory of 2704 2844 svchost.exe 31 PID 2844 wrote to memory of 2704 2844 svchost.exe 31 PID 2704 wrote to memory of 1224 2704 cmd.exe 33 PID 2704 wrote to memory of 1224 2704 cmd.exe 33 PID 2704 wrote to memory of 1224 2704 cmd.exe 33 PID 2704 wrote to memory of 1212 2704 cmd.exe 36 PID 2704 wrote to memory of 1212 2704 cmd.exe 36 PID 2704 wrote to memory of 1212 2704 cmd.exe 36 PID 2844 wrote to memory of 2220 2844 svchost.exe 38 PID 2844 wrote to memory of 2220 2844 svchost.exe 38 PID 2844 wrote to memory of 2220 2844 svchost.exe 38 PID 2220 wrote to memory of 2124 2220 cmd.exe 40 PID 2220 wrote to memory of 2124 2220 cmd.exe 40 PID 2220 wrote to memory of 2124 2220 cmd.exe 40 PID 2220 wrote to memory of 2144 2220 cmd.exe 41 PID 2220 wrote to memory of 2144 2220 cmd.exe 41 PID 2220 wrote to memory of 2144 2220 cmd.exe 41 PID 2844 wrote to memory of 2488 2844 svchost.exe 42 PID 2844 wrote to memory of 2488 2844 svchost.exe 42 PID 2844 wrote to memory of 2488 2844 svchost.exe 42 PID 2488 wrote to memory of 2964 2488 cmd.exe 44 PID 2488 wrote to memory of 2964 2488 cmd.exe 44 PID 2488 wrote to memory of 2964 2488 cmd.exe 44 PID 2844 wrote to memory of 2220 2844 svchost.exe 49 PID 2844 wrote to memory of 2220 2844 svchost.exe 49 PID 2844 wrote to memory of 2220 2844 svchost.exe 49 -
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\2025-01-17_ef76a31c46645c5b34b3560d6a92914e_chaos_destroyer_wannacry.exe"C:\Users\Admin\AppData\Local\Temp\2025-01-17_ef76a31c46645c5b34b3560d6a92914e_chaos_destroyer_wannacry.exe"1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2316 -
C:\Users\Admin\AppData\Roaming\svchost.exe"C:\Users\Admin\AppData\Roaming\svchost.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:2844 -
C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C vssadmin delete shadows /all /quiet & wmic shadowcopy delete3⤵
- Suspicious use of WriteProcessMemory
PID:2704 -
C:\Windows\system32\vssadmin.exevssadmin delete shadows /all /quiet4⤵
- Interacts with shadow copies
PID:1224
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C:\Windows\System32\Wbem\WMIC.exewmic shadowcopy delete4⤵
- Suspicious use of AdjustPrivilegeToken
PID:1212
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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:2220 -
C:\Windows\system32\bcdedit.exebcdedit /set {default} bootstatuspolicy ignoreallfailures4⤵
- Modifies boot configuration data using bcdedit
PID:2124
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C:\Windows\system32\bcdedit.exebcdedit /set {default} recoveryenabled no4⤵
- Modifies boot configuration data using bcdedit
PID:2144
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C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet3⤵
- Suspicious use of WriteProcessMemory
PID:2488 -
C:\Windows\system32\wbadmin.exewbadmin delete catalog -quiet4⤵
- Deletes backup catalog
PID:2964
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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:2220
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1708
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C:\Windows\system32\wbengine.exe"C:\Windows\system32\wbengine.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2924
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C:\Windows\System32\vdsldr.exeC:\Windows\System32\vdsldr.exe -Embedding1⤵PID:1880
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C:\Windows\System32\vds.exeC:\Windows\System32\vds.exe1⤵PID:2332
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
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
MD5ef76a31c46645c5b34b3560d6a92914e
SHA12867d691fe4ca452ffde1e015a4d7bb1b0d9fefd
SHA256f479b0a9e483856b47189e03f4c9a6f07cd9ee04f3aa494160134a03ac5526f6
SHA512a5ad94a2b7841be2bf23b413c15dc57c6cb196a79fa2cac8ceb607e30934a004caa579e90cae166825ad400d890573bf41ee7483d3300a5de8a2dc812181ec0e