Analysis
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max time kernel
117s -
max time network
117s -
platform
windows7_x64 -
resource
win7-20240708-en -
resource tags
arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-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 3 IoCs
resource yara_rule behavioral1/memory/2732-7-0x0000000000F40000-0x0000000000F9E000-memory.dmp family_chaos behavioral1/files/0x0004000000011ba2-6.dat family_chaos behavioral1/memory/2372-1-0x0000000000860000-0x00000000008BE000-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 2328 bcdedit.exe 3008 bcdedit.exe -
Renames multiple (199) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
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pid Process 2644 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\README.txt rizz.exe -
Executes dropped EXE 1 IoCs
pid Process 2732 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\C906A748\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\Start Menu\Programs\Maintenance\Desktop.ini rizz.exe File opened for modification C:\Users\Admin\Searches\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\Windows\Temporary Internet Files\Content.IE5\OW9ZQM06\desktop.ini rizz.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\V8SGIH7I\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\Recent\desktop.ini rizz.exe File opened for modification C:\Users\Admin\Downloads\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\desktop.ini rizz.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\desktop.ini rizz.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\N7ZQRMOO\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\Public\Music\Sample Music\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\All Users\Microsoft\Windows\Start Menu\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\Admin\Desktop\desktop.ini rizz.exe File opened for modification C:\Users\Admin\Favorites\desktop.ini rizz.exe File opened for modification C:\Users\Admin\Links\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\Ringtones\desktop.ini rizz.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\M720ATCO\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\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Accessibility\Desktop.ini rizz.exe File opened for modification C:\Users\Admin\Favorites\Links\desktop.ini rizz.exe File opened for modification C:\Users\Public\Downloads\desktop.ini rizz.exe File opened for modification C:\Users\Public\Pictures\desktop.ini rizz.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\ZO1X14N3\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\Documents\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\Accessories\Desktop.ini rizz.exe File opened for modification C:\Users\Default\AppData\Roaming\Microsoft\Windows\SendTo\Desktop.ini rizz.exe File opened for modification F:\$RECYCLE.BIN\S-1-5-21-2958949473-3205530200-1453100116-1000\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\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Desktop.ini rizz.exe File opened for modification C:\Users\Admin\Contacts\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\Videos\desktop.ini rizz.exe File opened for modification C:\Users\Public\Documents\desktop.ini rizz.exe File opened for modification C:\Users\Public\Music\desktop.ini rizz.exe File opened for modification C:\Users\Public\Pictures\Sample Pictures\desktop.ini rizz.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\MN6S8FGK\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\desktop.ini rizz.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\0JY8H21Z\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\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\Accessories\System Tools\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\Public\Recorded TV\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\Saved Games\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\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Administrative Tools\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\Accessibility\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\Burn\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\Programs\Accessories\System Tools\Desktop.ini rizz.exe -
Sets desktop wallpaper using registry 2 TTPs 2 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-2958949473-3205530200-1453100116-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\Pictures\\My Wallpaper.jpg" rizz.exe Set value (str) \REGISTRY\USER\S-1-5-21-2958949473-3205530200-1453100116-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\2cvlo4961.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 2832 vssadmin.exe -
Opens file in notepad (likely ransom note) 1 IoCs
pid Process 756 NOTEPAD.EXE -
Suspicious behavior: AddClipboardFormatListener 1 IoCs
pid Process 2732 rizz.exe -
Suspicious behavior: EnumeratesProcesses 7 IoCs
pid Process 2372 rizzler.exe 2372 rizzler.exe 2372 rizzler.exe 2732 rizz.exe 2732 rizz.exe 2732 rizz.exe 2732 rizz.exe -
Suspicious use of AdjustPrivilegeToken 48 IoCs
description pid Process Token: SeDebugPrivilege 2372 rizzler.exe Token: SeDebugPrivilege 2732 rizz.exe Token: SeBackupPrivilege 2936 vssvc.exe Token: SeRestorePrivilege 2936 vssvc.exe Token: SeAuditPrivilege 2936 vssvc.exe Token: SeIncreaseQuotaPrivilege 2044 WMIC.exe Token: SeSecurityPrivilege 2044 WMIC.exe Token: SeTakeOwnershipPrivilege 2044 WMIC.exe Token: SeLoadDriverPrivilege 2044 WMIC.exe Token: SeSystemProfilePrivilege 2044 WMIC.exe Token: SeSystemtimePrivilege 2044 WMIC.exe Token: SeProfSingleProcessPrivilege 2044 WMIC.exe Token: SeIncBasePriorityPrivilege 2044 WMIC.exe Token: SeCreatePagefilePrivilege 2044 WMIC.exe Token: SeBackupPrivilege 2044 WMIC.exe Token: SeRestorePrivilege 2044 WMIC.exe Token: SeShutdownPrivilege 2044 WMIC.exe Token: SeDebugPrivilege 2044 WMIC.exe Token: SeSystemEnvironmentPrivilege 2044 WMIC.exe Token: SeRemoteShutdownPrivilege 2044 WMIC.exe Token: SeUndockPrivilege 2044 WMIC.exe Token: SeManageVolumePrivilege 2044 WMIC.exe Token: 33 2044 WMIC.exe Token: 34 2044 WMIC.exe Token: 35 2044 WMIC.exe Token: SeIncreaseQuotaPrivilege 2044 WMIC.exe Token: SeSecurityPrivilege 2044 WMIC.exe Token: SeTakeOwnershipPrivilege 2044 WMIC.exe Token: SeLoadDriverPrivilege 2044 WMIC.exe Token: SeSystemProfilePrivilege 2044 WMIC.exe Token: SeSystemtimePrivilege 2044 WMIC.exe Token: SeProfSingleProcessPrivilege 2044 WMIC.exe Token: SeIncBasePriorityPrivilege 2044 WMIC.exe Token: SeCreatePagefilePrivilege 2044 WMIC.exe Token: SeBackupPrivilege 2044 WMIC.exe Token: SeRestorePrivilege 2044 WMIC.exe Token: SeShutdownPrivilege 2044 WMIC.exe Token: SeDebugPrivilege 2044 WMIC.exe Token: SeSystemEnvironmentPrivilege 2044 WMIC.exe Token: SeRemoteShutdownPrivilege 2044 WMIC.exe Token: SeUndockPrivilege 2044 WMIC.exe Token: SeManageVolumePrivilege 2044 WMIC.exe Token: 33 2044 WMIC.exe Token: 34 2044 WMIC.exe Token: 35 2044 WMIC.exe Token: SeBackupPrivilege 752 wbengine.exe Token: SeRestorePrivilege 752 wbengine.exe Token: SeSecurityPrivilege 752 wbengine.exe -
Suspicious use of WriteProcessMemory 30 IoCs
description pid Process procid_target PID 2372 wrote to memory of 2732 2372 rizzler.exe 31 PID 2372 wrote to memory of 2732 2372 rizzler.exe 31 PID 2372 wrote to memory of 2732 2372 rizzler.exe 31 PID 2732 wrote to memory of 2696 2732 rizz.exe 32 PID 2732 wrote to memory of 2696 2732 rizz.exe 32 PID 2732 wrote to memory of 2696 2732 rizz.exe 32 PID 2696 wrote to memory of 2832 2696 cmd.exe 34 PID 2696 wrote to memory of 2832 2696 cmd.exe 34 PID 2696 wrote to memory of 2832 2696 cmd.exe 34 PID 2696 wrote to memory of 2044 2696 cmd.exe 37 PID 2696 wrote to memory of 2044 2696 cmd.exe 37 PID 2696 wrote to memory of 2044 2696 cmd.exe 37 PID 2732 wrote to memory of 2424 2732 rizz.exe 39 PID 2732 wrote to memory of 2424 2732 rizz.exe 39 PID 2732 wrote to memory of 2424 2732 rizz.exe 39 PID 2424 wrote to memory of 3008 2424 cmd.exe 41 PID 2424 wrote to memory of 3008 2424 cmd.exe 41 PID 2424 wrote to memory of 3008 2424 cmd.exe 41 PID 2424 wrote to memory of 2328 2424 cmd.exe 42 PID 2424 wrote to memory of 2328 2424 cmd.exe 42 PID 2424 wrote to memory of 2328 2424 cmd.exe 42 PID 2732 wrote to memory of 2376 2732 rizz.exe 43 PID 2732 wrote to memory of 2376 2732 rizz.exe 43 PID 2732 wrote to memory of 2376 2732 rizz.exe 43 PID 2376 wrote to memory of 2644 2376 cmd.exe 45 PID 2376 wrote to memory of 2644 2376 cmd.exe 45 PID 2376 wrote to memory of 2644 2376 cmd.exe 45 PID 2732 wrote to memory of 756 2732 rizz.exe 50 PID 2732 wrote to memory of 756 2732 rizz.exe 50 PID 2732 wrote to memory of 756 2732 rizz.exe 50 -
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⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2372 -
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:2732 -
C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C vssadmin delete shadows /all /quiet & wmic shadowcopy delete3⤵
- Suspicious use of WriteProcessMemory
PID:2696 -
C:\Windows\system32\vssadmin.exevssadmin delete shadows /all /quiet4⤵
- Interacts with shadow copies
PID:2832
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C:\Windows\System32\Wbem\WMIC.exewmic shadowcopy delete4⤵
- Suspicious use of AdjustPrivilegeToken
PID:2044
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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:2424 -
C:\Windows\system32\bcdedit.exebcdedit /set {default} bootstatuspolicy ignoreallfailures4⤵
- Modifies boot configuration data using bcdedit
PID:3008
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C:\Windows\system32\bcdedit.exebcdedit /set {default} recoveryenabled no4⤵
- Modifies boot configuration data using bcdedit
PID:2328
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C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet3⤵
- Suspicious use of WriteProcessMemory
PID:2376 -
C:\Windows\system32\wbadmin.exewbadmin delete catalog -quiet4⤵
- Deletes backup catalog
PID:2644
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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:756
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2936
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C:\Windows\system32\wbengine.exe"C:\Windows\system32\wbengine.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
PID:752
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C:\Windows\System32\vdsldr.exeC:\Windows\System32\vdsldr.exe -Embedding1⤵PID:2960
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C:\Windows\System32\vds.exeC:\Windows\System32\vds.exe1⤵PID:1480
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
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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
24B
MD5678f6626419e8807903d70fb10c636f1
SHA10171cddffdbd40c8fefdff3b768f5a606c7242e3
SHA2567778833292841e50a2fb01d041179c3c0e04f359b120112ceba8afc426b51083
SHA512d90a67ec8896aac6c74bbc37670a3e59182e4dcdb652aa793fbedd7e1e8b2a447f7a622050759910c3dc44f98e103e19da018dddec6455f997a41ee2f8014060
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Filesize
348KB
MD5fc031cdd7fe84e5221305c87e6375e13
SHA157f0e3cd6bf5dc09fbaacd0d9fcb7bf35af8eed7
SHA2561e93d49cb048b0bf26ddd4cf728fc9e7900b33222de596140cac44dc41bc14f4
SHA51267f4094e826d990e26de3e0770ad7eb87046dc6fefdc1278ebe0995b5e33282dc05b025f9b49aafedcaca491f563f48963be559456c1fe1b6e401250e8659546