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Analysis
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max time kernel
119s -
max time network
120s -
platform
windows7_x64 -
resource
win7-20240704-en -
resource tags
arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-x64system -
submitted
30/07/2024, 18:45
Behavioral task
behavioral1
Sample
rizz.exe
Resource
win7-20240704-en
Behavioral task
behavioral2
Sample
rizz.exe
Resource
win10v2004-20240730-en
General
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Target
rizz.exe
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Size
350KB
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MD5
ab9ee3b7d39ae287945ad39982ec85a4
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SHA1
f0dfa957943226652b331f3c2719986aca70b06f
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SHA256
c53d11e64900ef4511cbf12f7ba3512f8a2c241bea9bed289aa143cebc7d38b6
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SHA512
71c39f993f6594e319858920184b7a2e6dfaf5ac177ce096677ed88f401ceafd2ca89fa3b8a4b49e3d6b94f33a15501b733eec406150d5c381337f13f895ffc1
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SSDEEP
6144:vkc9tNqFqt+GIIIIIIIhIIIIIIIIIIIIIIIU:vbqkG
Malware Config
Extracted
C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Crashpad\rizz_me.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/1488-1-0x0000000000960000-0x00000000009BE000-memory.dmp family_chaos behavioral1/files/0x000d00000001226a-5.dat family_chaos behavioral1/memory/2324-7-0x00000000008C0000-0x000000000091E000-memory.dmp 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
pid Process 2464 bcdedit.exe 2564 bcdedit.exe -
Renames multiple (186) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
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pid Process 2276 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\rizz.url rizz.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\desktop.ini rizz.exe File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\rizz_me.txt rizz.exe -
Executes dropped EXE 1 IoCs
pid Process 2324 rizz.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\FGBCC7A8\desktop.ini rizz.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\History\History.IE5\desktop.ini rizz.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\JVMDVGRW\desktop.ini rizz.exe File opened for modification C:\Users\Admin\Saved Games\desktop.ini rizz.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\desktop.ini rizz.exe File opened for modification C:\Users\Public\Music\Sample Music\desktop.ini rizz.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\desktop.ini rizz.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\Accessories\System Tools\Desktop.ini rizz.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\Accessories\Tablet PC\Desktop.ini rizz.exe File opened for modification C:\Users\Public\Libraries\desktop.ini rizz.exe File opened for modification C:\Users\Public\Pictures\Sample Pictures\desktop.ini rizz.exe File opened for modification C:\Users\Public\Videos\desktop.ini rizz.exe File opened for modification F:\$RECYCLE.BIN\S-1-5-21-3450744190-3404161390-554719085-1000\desktop.ini rizz.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\G4UA8T7D\desktop.ini rizz.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Maintenance\Desktop.ini rizz.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\Administrative Tools\desktop.ini rizz.exe File opened for modification C:\Users\Default\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Accessibility\Desktop.ini rizz.exe File opened for modification C:\Users\Public\Documents\desktop.ini rizz.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\XLI5Q0EH\desktop.ini rizz.exe File opened for modification C:\Users\Default\AppData\Roaming\Microsoft\Windows\SendTo\Desktop.ini rizz.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\OJBRRE9R\desktop.ini rizz.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\System Tools\Desktop.ini rizz.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\Accessories\Accessibility\Desktop.ini rizz.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\Maintenance\Desktop.ini rizz.exe File opened for modification C:\Users\Public\Videos\Sample Videos\desktop.ini rizz.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Libraries\desktop.ini rizz.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\desktop.ini rizz.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\desktop.ini rizz.exe File opened for modification C:\Users\Admin\Links\desktop.ini rizz.exe File opened for modification C:\Users\Admin\Music\desktop.ini rizz.exe File opened for modification C:\Users\Default\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\System Tools\Desktop.ini rizz.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\History\desktop.ini rizz.exe File opened for modification C:\Users\Admin\Documents\desktop.ini rizz.exe File opened for modification C:\Users\Admin\Favorites\Links\desktop.ini rizz.exe File opened for modification C:\Users\Admin\Favorites\Links for United States\desktop.ini rizz.exe File opened for modification C:\Users\Admin\Searches\desktop.ini rizz.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\Accessories\Desktop.ini rizz.exe File opened for modification C:\Users\Default\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Desktop.ini rizz.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\Games\Desktop.ini rizz.exe File opened for modification C:\Users\Default\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\desktop.ini rizz.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\Burn\Burn\desktop.ini rizz.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\FH198YO1\desktop.ini rizz.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\Accessories\Windows PowerShell\desktop.ini rizz.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\Startup\desktop.ini rizz.exe File opened for modification C:\Users\Default\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Maintenance\Desktop.ini rizz.exe File opened for modification C:\Users\Public\Desktop\desktop.ini rizz.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows Mail\Stationery\Desktop.ini rizz.exe File opened for modification C:\Users\Admin\Downloads\desktop.ini rizz.exe File opened for modification C:\Users\Admin\Favorites\desktop.ini rizz.exe File opened for modification C:\Users\Public\Recorded TV\desktop.ini rizz.exe File opened for modification C:\Users\Public\Recorded TV\Sample Media\desktop.ini rizz.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\E9P9LRO9\desktop.ini rizz.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\desktop.ini rizz.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Administrative Tools\desktop.ini rizz.exe File opened for modification C:\Users\Public\Music\desktop.ini rizz.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Desktop.ini rizz.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Accessibility\Desktop.ini rizz.exe File opened for modification C:\Users\Admin\Pictures\desktop.ini rizz.exe File opened for modification C:\Users\Public\desktop.ini rizz.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\AJW4QSK9\desktop.ini rizz.exe File opened for modification C:\Users\Admin\Contacts\desktop.ini rizz.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\desktop.ini rizz.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\SendTo\Desktop.ini rizz.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\desktop.ini rizz.exe -
Sets desktop wallpaper using registry 2 TTPs 2 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-3450744190-3404161390-554719085-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\2qnv2li9t.jpg" rizz.exe Set value (str) \REGISTRY\USER\S-1-5-21-3450744190-3404161390-554719085-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\Pictures\\My Wallpaper.jpg" rizz.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 2364 vssadmin.exe -
Opens file in notepad (likely ransom note) 1 IoCs
pid Process 1624 NOTEPAD.EXE -
Suspicious behavior: AddClipboardFormatListener 1 IoCs
pid Process 2324 rizz.exe -
Suspicious behavior: EnumeratesProcesses 7 IoCs
pid Process 1488 rizz.exe 1488 rizz.exe 1488 rizz.exe 2324 rizz.exe 2324 rizz.exe 2324 rizz.exe 2324 rizz.exe -
Suspicious use of AdjustPrivilegeToken 48 IoCs
description pid Process Token: SeDebugPrivilege 1488 rizz.exe Token: SeDebugPrivilege 2324 rizz.exe Token: SeBackupPrivilege 3048 vssvc.exe Token: SeRestorePrivilege 3048 vssvc.exe Token: SeAuditPrivilege 3048 vssvc.exe Token: SeIncreaseQuotaPrivilege 3020 WMIC.exe Token: SeSecurityPrivilege 3020 WMIC.exe Token: SeTakeOwnershipPrivilege 3020 WMIC.exe Token: SeLoadDriverPrivilege 3020 WMIC.exe Token: SeSystemProfilePrivilege 3020 WMIC.exe Token: SeSystemtimePrivilege 3020 WMIC.exe Token: SeProfSingleProcessPrivilege 3020 WMIC.exe Token: SeIncBasePriorityPrivilege 3020 WMIC.exe Token: SeCreatePagefilePrivilege 3020 WMIC.exe Token: SeBackupPrivilege 3020 WMIC.exe Token: SeRestorePrivilege 3020 WMIC.exe Token: SeShutdownPrivilege 3020 WMIC.exe Token: SeDebugPrivilege 3020 WMIC.exe Token: SeSystemEnvironmentPrivilege 3020 WMIC.exe Token: SeRemoteShutdownPrivilege 3020 WMIC.exe Token: SeUndockPrivilege 3020 WMIC.exe Token: SeManageVolumePrivilege 3020 WMIC.exe Token: 33 3020 WMIC.exe Token: 34 3020 WMIC.exe Token: 35 3020 WMIC.exe Token: SeIncreaseQuotaPrivilege 3020 WMIC.exe Token: SeSecurityPrivilege 3020 WMIC.exe Token: SeTakeOwnershipPrivilege 3020 WMIC.exe Token: SeLoadDriverPrivilege 3020 WMIC.exe Token: SeSystemProfilePrivilege 3020 WMIC.exe Token: SeSystemtimePrivilege 3020 WMIC.exe Token: SeProfSingleProcessPrivilege 3020 WMIC.exe Token: SeIncBasePriorityPrivilege 3020 WMIC.exe Token: SeCreatePagefilePrivilege 3020 WMIC.exe Token: SeBackupPrivilege 3020 WMIC.exe Token: SeRestorePrivilege 3020 WMIC.exe Token: SeShutdownPrivilege 3020 WMIC.exe Token: SeDebugPrivilege 3020 WMIC.exe Token: SeSystemEnvironmentPrivilege 3020 WMIC.exe Token: SeRemoteShutdownPrivilege 3020 WMIC.exe Token: SeUndockPrivilege 3020 WMIC.exe Token: SeManageVolumePrivilege 3020 WMIC.exe Token: 33 3020 WMIC.exe Token: 34 3020 WMIC.exe Token: 35 3020 WMIC.exe Token: SeBackupPrivilege 1996 wbengine.exe Token: SeRestorePrivilege 1996 wbengine.exe Token: SeSecurityPrivilege 1996 wbengine.exe -
Suspicious use of WriteProcessMemory 30 IoCs
description pid Process procid_target PID 1488 wrote to memory of 2324 1488 rizz.exe 30 PID 1488 wrote to memory of 2324 1488 rizz.exe 30 PID 1488 wrote to memory of 2324 1488 rizz.exe 30 PID 2324 wrote to memory of 2328 2324 rizz.exe 31 PID 2324 wrote to memory of 2328 2324 rizz.exe 31 PID 2324 wrote to memory of 2328 2324 rizz.exe 31 PID 2328 wrote to memory of 2364 2328 cmd.exe 33 PID 2328 wrote to memory of 2364 2328 cmd.exe 33 PID 2328 wrote to memory of 2364 2328 cmd.exe 33 PID 2328 wrote to memory of 3020 2328 cmd.exe 36 PID 2328 wrote to memory of 3020 2328 cmd.exe 36 PID 2328 wrote to memory of 3020 2328 cmd.exe 36 PID 2324 wrote to memory of 2408 2324 rizz.exe 38 PID 2324 wrote to memory of 2408 2324 rizz.exe 38 PID 2324 wrote to memory of 2408 2324 rizz.exe 38 PID 2408 wrote to memory of 2464 2408 cmd.exe 40 PID 2408 wrote to memory of 2464 2408 cmd.exe 40 PID 2408 wrote to memory of 2464 2408 cmd.exe 40 PID 2408 wrote to memory of 2564 2408 cmd.exe 41 PID 2408 wrote to memory of 2564 2408 cmd.exe 41 PID 2408 wrote to memory of 2564 2408 cmd.exe 41 PID 2324 wrote to memory of 2944 2324 rizz.exe 42 PID 2324 wrote to memory of 2944 2324 rizz.exe 42 PID 2324 wrote to memory of 2944 2324 rizz.exe 42 PID 2944 wrote to memory of 2276 2944 cmd.exe 44 PID 2944 wrote to memory of 2276 2944 cmd.exe 44 PID 2944 wrote to memory of 2276 2944 cmd.exe 44 PID 2324 wrote to memory of 1624 2324 rizz.exe 49 PID 2324 wrote to memory of 1624 2324 rizz.exe 49 PID 2324 wrote to memory of 1624 2324 rizz.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\rizz.exe"C:\Users\Admin\AppData\Local\Temp\rizz.exe"1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1488 -
C:\Users\Admin\AppData\Roaming\rizz.exe"C:\Users\Admin\AppData\Roaming\rizz.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:2324 -
C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C vssadmin delete shadows /all /quiet & wmic shadowcopy delete3⤵
- Suspicious use of WriteProcessMemory
PID:2328 -
C:\Windows\system32\vssadmin.exevssadmin delete shadows /all /quiet4⤵
- Interacts with shadow copies
PID:2364
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C:\Windows\System32\Wbem\WMIC.exewmic shadowcopy delete4⤵
- Suspicious use of AdjustPrivilegeToken
PID:3020
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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:2408 -
C:\Windows\system32\bcdedit.exebcdedit /set {default} bootstatuspolicy ignoreallfailures4⤵
- Modifies boot configuration data using bcdedit
PID:2464
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C:\Windows\system32\bcdedit.exebcdedit /set {default} recoveryenabled no4⤵
- Modifies boot configuration data using bcdedit
PID:2564
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C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet3⤵
- Suspicious use of WriteProcessMemory
PID:2944 -
C:\Windows\system32\wbadmin.exewbadmin delete catalog -quiet4⤵
- Deletes backup catalog
PID:2276
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C:\Windows\system32\NOTEPAD.EXE"C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\rizz_me.txt3⤵
- Opens file in notepad (likely ransom note)
PID:1624
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:3048
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C:\Windows\system32\wbengine.exe"C:\Windows\system32\wbengine.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1996
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C:\Windows\System32\vdsldr.exeC:\Windows\System32\vdsldr.exe -Embedding1⤵PID:300
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C:\Windows\System32\vds.exeC:\Windows\System32\vds.exe1⤵PID:352
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
350KB
MD5ab9ee3b7d39ae287945ad39982ec85a4
SHA1f0dfa957943226652b331f3c2719986aca70b06f
SHA256c53d11e64900ef4511cbf12f7ba3512f8a2c241bea9bed289aa143cebc7d38b6
SHA51271c39f993f6594e319858920184b7a2e6dfaf5ac177ce096677ed88f401ceafd2ca89fa3b8a4b49e3d6b94f33a15501b733eec406150d5c381337f13f895ffc1