Analysis
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max time kernel
123s -
max time network
127s -
platform
windows10-2004_x64 -
resource
win10v2004-20240730-en -
resource tags
arch:x64arch:x86image:win10v2004-20240730-enlocale:en-usos:windows10-2004-x64system -
submitted
30-07-2024 18:49
Behavioral task
behavioral1
Sample
rizzler.exe
Resource
win7-20240708-en
Behavioral task
behavioral2
Sample
rizzler.exe
Resource
win10v2004-20240730-en
General
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Target
rizzler.exe
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Size
348KB
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MD5
fc031cdd7fe84e5221305c87e6375e13
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SHA1
57f0e3cd6bf5dc09fbaacd0d9fcb7bf35af8eed7
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SHA256
1e93d49cb048b0bf26ddd4cf728fc9e7900b33222de596140cac44dc41bc14f4
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SHA512
67f4094e826d990e26de3e0770ad7eb87046dc6fefdc1278ebe0995b5e33282dc05b025f9b49aafedcaca491f563f48963be559456c1fe1b6e401250e8659546
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SSDEEP
6144:Ic9HqFqv+GIIIIIIIhIIIIIIIIIIIIIIIU:7qkQ
Malware Config
Signatures
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Chaos
Ransomware family first seen in June 2021.
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Chaos Ransomware 2 IoCs
resource yara_rule behavioral2/memory/944-0-0x00000000000B0000-0x000000000010E000-memory.dmp family_chaos behavioral2/files/0x0009000000023406-6.dat 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 3520 bcdedit.exe 3632 bcdedit.exe -
Renames multiple (206) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
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pid Process 4264 wbadmin.exe -
Disables Task Manager via registry modification
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Checks computer location settings 2 TTPs 2 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-3881032017-2947584075-2120384563-1000\Control Panel\International\Geo\Nation rizzler.exe Key value queried \REGISTRY\USER\S-1-5-21-3881032017-2947584075-2120384563-1000\Control Panel\International\Geo\Nation rizz.exe -
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\README.txt rizz.exe -
Executes dropped EXE 1 IoCs
pid Process 1016 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\Roaming\Microsoft\Windows\Start Menu\Programs\Administrative Tools\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\AccountPictures\desktop.ini rizz.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\WinX\Group2\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\Start Menu\desktop.ini rizz.exe File opened for modification C:\Users\Admin\Music\desktop.ini rizz.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\Windows PowerShell\desktop.ini rizz.exe File opened for modification C:\Users\Default\AppData\Local\Microsoft\Windows\WinX\Group1\desktop.ini rizz.exe File opened for modification C:\Users\Public\Downloads\desktop.ini rizz.exe File opened for modification C:\Users\Public\Libraries\desktop.ini rizz.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\Burn\Burn1\desktop.ini rizz.exe File opened for modification C:\Users\Public\Videos\desktop.ini rizz.exe File opened for modification C:\Users\Admin\Saved Games\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\System Tools\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\Public\AccountPictures\desktop.ini rizz.exe File opened for modification C:\Users\Admin\Pictures\desktop.ini rizz.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\Accessibility\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\WinX\Group3\desktop.ini rizz.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessibility\desktop.ini rizz.exe File opened for modification C:\Users\Default\AppData\Local\Microsoft\Windows\WinX\Group3\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\History\desktop.ini rizz.exe File opened for modification C:\Users\Default\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\System Tools\Desktop.ini rizz.exe File opened for modification C:\Users\Default\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessibility\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\Programs\Maintenance\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\Pictures\desktop.ini rizz.exe File opened for modification C:\Users\Admin\3D Objects\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\Roaming\Microsoft\Internet Explorer\Quick Launch\User Pinned\TaskBar\desktop.ini rizz.exe File opened for modification C:\Users\Admin\Favorites\desktop.ini rizz.exe File opened for modification C:\Users\Admin\Videos\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\Administrative Tools\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\Admin\AppData\Local\Microsoft\Windows\Application Shortcuts\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\System Tools\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\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\desktop.ini rizz.exe File opened for modification C:\Users\Admin\Documents\desktop.ini rizz.exe File opened for modification C:\Users\Admin\Downloads\desktop.ini rizz.exe File opened for modification C:\Users\Admin\Favorites\Links\desktop.ini rizz.exe File opened for modification C:\Users\Default\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\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\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\desktop.ini rizz.exe File opened for modification C:\Users\Admin\OneDrive\desktop.ini rizz.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\Burn\Burn2\desktop.ini rizz.exe File opened for modification C:\Users\Public\Music\desktop.ini rizz.exe File opened for modification F:\$RECYCLE.BIN\S-1-5-21-3881032017-2947584075-2120384563-1000\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\Pictures\Saved Pictures\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\Admin\Links\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\WinX\Group1\desktop.ini rizz.exe File opened for modification C:\Users\Admin\Pictures\Camera Roll\desktop.ini rizz.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\desktop.ini rizz.exe -
Sets desktop wallpaper using registry 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-3881032017-2947584075-2120384563-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\00pq863bx.jpg" rizz.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.
description ioc Process 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 Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\DISK&VEN_WDC&PROD_WDS100T2B0A\4&215468A5&0&000000 vds.exe -
Interacts with shadow copies 3 TTPs 1 IoCs
Shadow copies are often targeted by ransomware to inhibit system recovery.
pid Process 2328 vssadmin.exe -
Modifies registry class 1 IoCs
description ioc Process Key created \REGISTRY\USER\S-1-5-21-3881032017-2947584075-2120384563-1000_Classes\Local Settings rizz.exe -
Opens file in notepad (likely ransom note) 1 IoCs
pid Process 3108 NOTEPAD.EXE -
Suspicious behavior: AddClipboardFormatListener 1 IoCs
pid Process 1016 rizz.exe -
Suspicious behavior: EnumeratesProcesses 41 IoCs
pid Process 944 rizzler.exe 944 rizzler.exe 944 rizzler.exe 944 rizzler.exe 944 rizzler.exe 944 rizzler.exe 944 rizzler.exe 944 rizzler.exe 944 rizzler.exe 944 rizzler.exe 944 rizzler.exe 944 rizzler.exe 944 rizzler.exe 944 rizzler.exe 944 rizzler.exe 944 rizzler.exe 944 rizzler.exe 944 rizzler.exe 944 rizzler.exe 1016 rizz.exe 1016 rizz.exe 1016 rizz.exe 1016 rizz.exe 1016 rizz.exe 1016 rizz.exe 1016 rizz.exe 1016 rizz.exe 1016 rizz.exe 1016 rizz.exe 1016 rizz.exe 1016 rizz.exe 1016 rizz.exe 1016 rizz.exe 1016 rizz.exe 1016 rizz.exe 1016 rizz.exe 1016 rizz.exe 1016 rizz.exe 1016 rizz.exe 1016 rizz.exe 1016 rizz.exe -
Suspicious use of AdjustPrivilegeToken 50 IoCs
description pid Process Token: SeDebugPrivilege 944 rizzler.exe Token: SeDebugPrivilege 1016 rizz.exe Token: SeBackupPrivilege 4888 vssvc.exe Token: SeRestorePrivilege 4888 vssvc.exe Token: SeAuditPrivilege 4888 vssvc.exe Token: SeIncreaseQuotaPrivilege 720 WMIC.exe Token: SeSecurityPrivilege 720 WMIC.exe Token: SeTakeOwnershipPrivilege 720 WMIC.exe Token: SeLoadDriverPrivilege 720 WMIC.exe Token: SeSystemProfilePrivilege 720 WMIC.exe Token: SeSystemtimePrivilege 720 WMIC.exe Token: SeProfSingleProcessPrivilege 720 WMIC.exe Token: SeIncBasePriorityPrivilege 720 WMIC.exe Token: SeCreatePagefilePrivilege 720 WMIC.exe Token: SeBackupPrivilege 720 WMIC.exe Token: SeRestorePrivilege 720 WMIC.exe Token: SeShutdownPrivilege 720 WMIC.exe Token: SeDebugPrivilege 720 WMIC.exe Token: SeSystemEnvironmentPrivilege 720 WMIC.exe Token: SeRemoteShutdownPrivilege 720 WMIC.exe Token: SeUndockPrivilege 720 WMIC.exe Token: SeManageVolumePrivilege 720 WMIC.exe Token: 33 720 WMIC.exe Token: 34 720 WMIC.exe Token: 35 720 WMIC.exe Token: 36 720 WMIC.exe Token: SeIncreaseQuotaPrivilege 720 WMIC.exe Token: SeSecurityPrivilege 720 WMIC.exe Token: SeTakeOwnershipPrivilege 720 WMIC.exe Token: SeLoadDriverPrivilege 720 WMIC.exe Token: SeSystemProfilePrivilege 720 WMIC.exe Token: SeSystemtimePrivilege 720 WMIC.exe Token: SeProfSingleProcessPrivilege 720 WMIC.exe Token: SeIncBasePriorityPrivilege 720 WMIC.exe Token: SeCreatePagefilePrivilege 720 WMIC.exe Token: SeBackupPrivilege 720 WMIC.exe Token: SeRestorePrivilege 720 WMIC.exe Token: SeShutdownPrivilege 720 WMIC.exe Token: SeDebugPrivilege 720 WMIC.exe Token: SeSystemEnvironmentPrivilege 720 WMIC.exe Token: SeRemoteShutdownPrivilege 720 WMIC.exe Token: SeUndockPrivilege 720 WMIC.exe Token: SeManageVolumePrivilege 720 WMIC.exe Token: 33 720 WMIC.exe Token: 34 720 WMIC.exe Token: 35 720 WMIC.exe Token: 36 720 WMIC.exe Token: SeBackupPrivilege 660 wbengine.exe Token: SeRestorePrivilege 660 wbengine.exe Token: SeSecurityPrivilege 660 wbengine.exe -
Suspicious use of WriteProcessMemory 20 IoCs
description pid Process procid_target PID 944 wrote to memory of 1016 944 rizzler.exe 84 PID 944 wrote to memory of 1016 944 rizzler.exe 84 PID 1016 wrote to memory of 2868 1016 rizz.exe 85 PID 1016 wrote to memory of 2868 1016 rizz.exe 85 PID 2868 wrote to memory of 2328 2868 cmd.exe 87 PID 2868 wrote to memory of 2328 2868 cmd.exe 87 PID 2868 wrote to memory of 720 2868 cmd.exe 90 PID 2868 wrote to memory of 720 2868 cmd.exe 90 PID 1016 wrote to memory of 3136 1016 rizz.exe 92 PID 1016 wrote to memory of 3136 1016 rizz.exe 92 PID 3136 wrote to memory of 3520 3136 cmd.exe 94 PID 3136 wrote to memory of 3520 3136 cmd.exe 94 PID 3136 wrote to memory of 3632 3136 cmd.exe 95 PID 3136 wrote to memory of 3632 3136 cmd.exe 95 PID 1016 wrote to memory of 2480 1016 rizz.exe 96 PID 1016 wrote to memory of 2480 1016 rizz.exe 96 PID 2480 wrote to memory of 4264 2480 cmd.exe 98 PID 2480 wrote to memory of 4264 2480 cmd.exe 98 PID 1016 wrote to memory of 3108 1016 rizz.exe 104 PID 1016 wrote to memory of 3108 1016 rizz.exe 104 -
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\rizzler.exe"C:\Users\Admin\AppData\Local\Temp\rizzler.exe"1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:944 -
C:\Users\Admin\AppData\Roaming\rizz.exe"C:\Users\Admin\AppData\Roaming\rizz.exe"2⤵
- Checks computer location settings
- Drops startup file
- Executes dropped EXE
- Drops desktop.ini file(s)
- Sets desktop wallpaper using registry
- Modifies registry class
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1016 -
C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C vssadmin delete shadows /all /quiet & wmic shadowcopy delete3⤵
- Suspicious use of WriteProcessMemory
PID:2868 -
C:\Windows\system32\vssadmin.exevssadmin delete shadows /all /quiet4⤵
- Interacts with shadow copies
PID:2328
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C:\Windows\System32\Wbem\WMIC.exewmic shadowcopy delete4⤵
- Suspicious use of AdjustPrivilegeToken
PID:720
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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:3136 -
C:\Windows\system32\bcdedit.exebcdedit /set {default} bootstatuspolicy ignoreallfailures4⤵
- Modifies boot configuration data using bcdedit
PID:3520
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C:\Windows\system32\bcdedit.exebcdedit /set {default} recoveryenabled no4⤵
- Modifies boot configuration data using bcdedit
PID:3632
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C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet3⤵
- Suspicious use of WriteProcessMemory
PID:2480 -
C:\Windows\system32\wbadmin.exewbadmin delete catalog -quiet4⤵
- Deletes backup catalog
PID:4264
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C:\Windows\system32\NOTEPAD.EXE"C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\README.txt3⤵
- Opens file in notepad (likely ransom note)
PID:3108
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:4888
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C:\Windows\system32\wbengine.exe"C:\Windows\system32\wbengine.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
PID:660
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C:\Windows\System32\vdsldr.exeC:\Windows\System32\vdsldr.exe -Embedding1⤵PID:4864
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C:\Windows\System32\vds.exeC:\Windows\System32\vds.exe1⤵
- Checks SCSI registry key(s)
PID:228
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
226B
MD528d7fcc2b910da5e67ebb99451a5f598
SHA1a5bf77a53eda1208f4f37d09d82da0b9915a6747
SHA2562391511d0a66ed9f84ae54254f51c09e43be01ad685db80da3201ec880abd49c
SHA5122d8eb65cbf04ca506f4ef3b9ae13ccf05ebefab702269ba70ffd1ce9e6c615db0a3ee3ac0e81a06f546fc3250b7b76155dd51241c41b507a441b658c8e761df6
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Filesize
86B
MD5112b5f9570b63d4b6dd4fd5e592f20af
SHA1bcb355601f10844d84c6ea910ff1d8b983d43041
SHA25637dee262da5bb8982909a2d9a13804d14e0477edc90363221603d4ca152218c9
SHA51283619661aa20224c847330e3e79c74ae1554692054c7189efdff1d1c89e86b6f85f6927fde0db628bd4727e5ae44e80caf1d370f9923a4e822463fcf426f5f65
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Filesize
1B
MD5d1457b72c3fb323a2671125aef3eab5d
SHA15bab61eb53176449e25c2c82f172b82cb13ffb9d
SHA2568a8de823d5ed3e12746a62ef169bcf372be0ca44f0a1236abc35df05d96928e1
SHA512ca63c07ad35d8c9fb0c92d6146759b122d4ec5d3f67ebe2f30ddb69f9e6c9fd3bf31a5e408b08f1d4d9cd68120cced9e57f010bef3cde97653fed5470da7d1a0
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Filesize
348KB
MD5fc031cdd7fe84e5221305c87e6375e13
SHA157f0e3cd6bf5dc09fbaacd0d9fcb7bf35af8eed7
SHA2561e93d49cb048b0bf26ddd4cf728fc9e7900b33222de596140cac44dc41bc14f4
SHA51267f4094e826d990e26de3e0770ad7eb87046dc6fefdc1278ebe0995b5e33282dc05b025f9b49aafedcaca491f563f48963be559456c1fe1b6e401250e8659546