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Analysis
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max time kernel
149s -
max time network
149s -
platform
windows10-2004_x64 -
resource
win10v2004-20240426-en -
resource tags
arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system -
submitted
24/05/2024, 11:30
Behavioral task
behavioral1
Sample
524a898e18999ceac864dbac5b85fa2f14392e389b3c32f77d58e2a89cdf01c4.exe
Resource
win7-20231129-en
Behavioral task
behavioral2
Sample
524a898e18999ceac864dbac5b85fa2f14392e389b3c32f77d58e2a89cdf01c4.exe
Resource
win10v2004-20240426-en
General
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Target
524a898e18999ceac864dbac5b85fa2f14392e389b3c32f77d58e2a89cdf01c4.exe
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Size
3.2MB
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MD5
db5c28ec647afd894c01422584d551a5
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SHA1
fa0b5ebcb983509eebc7222725792976fad2aca8
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SHA256
524a898e18999ceac864dbac5b85fa2f14392e389b3c32f77d58e2a89cdf01c4
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SHA512
730054505deddeeefce4b1cc3b8ea362946e9e12ea289bc64285c0ce417d8964a767d03ccdf69ab4dd184d9888b9f3c1b51134cfb9c067861b5c1f4c06a3f67a
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SSDEEP
24576:s0JR6V45PL2ybTlBpPcmtR9tArJms0dIU1wuKav4WgNFlLKKDGyMgl+ICHusEd:5iylZ9tAcBSGgJtAZu
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/1164-0-0x0000000000210000-0x000000000054C000-memory.dmp family_chaos behavioral2/files/0x0008000000022976-7.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 1016 bcdedit.exe 992 bcdedit.exe -
pid Process 4676 wbadmin.exe -
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-1-5-21-1162180587-977231257-2194346871-1000\Control Panel\International\Geo\Nation 524a898e18999ceac864dbac5b85fa2f14392e389b3c32f77d58e2a89cdf01c4.exe Key value queried \REGISTRY\USER\S-1-5-21-1162180587-977231257-2194346871-1000\Control Panel\International\Geo\Nation svchost.exe -
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\Leggimi.txt svchost.exe -
Executes dropped EXE 1 IoCs
pid Process 4120 svchost.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) 34 IoCs
description ioc Process File opened for modification C:\Users\Admin\Pictures\desktop.ini svchost.exe File opened for modification C:\Users\Public\Documents\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Pictures\Camera Roll\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Searches\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\Public\Desktop\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Desktop\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Music\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\User Pinned\TaskBar\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\Public\Videos\desktop.ini svchost.exe File opened for modification C:\Users\Public\Music\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Links\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Downloads\desktop.ini svchost.exe File opened for modification C:\Users\Admin\OneDrive\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\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessibility\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Saved Games\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Favorites\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\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\System Tools\Desktop.ini svchost.exe File opened for modification F:\$RECYCLE.BIN\S-1-5-21-1162180587-977231257-2194346871-1000\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\AccountPictures\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\Admin\Contacts\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Documents\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Videos\desktop.ini svchost.exe File opened for modification C:\Users\Public\Pictures\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Pictures\Saved Pictures\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Favorites\Links\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\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Maintenance\Desktop.ini svchost.exe -
Sets desktop wallpaper using registry 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-1162180587-977231257-2194346871-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\v7txtanif.jpg" svchost.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 opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\DISK&VEN_DADY&PROD_HARDDISK\4&215468A5&0&000000 vds.exe Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_DADY&Prod_HARDDISK\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 -
Interacts with shadow copies 2 TTPs 1 IoCs
Shadow copies are often targeted by ransomware to inhibit system recovery.
pid Process 4028 vssadmin.exe -
Modifies registry class 1 IoCs
description ioc Process Key created \REGISTRY\USER\S-1-5-21-1162180587-977231257-2194346871-1000_Classes\Local Settings svchost.exe -
Opens file in notepad (likely ransom note) 1 IoCs
pid Process 2252 NOTEPAD.EXE -
Suspicious behavior: AddClipboardFormatListener 1 IoCs
pid Process 4120 svchost.exe -
Suspicious behavior: EnumeratesProcesses 51 IoCs
pid Process 1164 524a898e18999ceac864dbac5b85fa2f14392e389b3c32f77d58e2a89cdf01c4.exe 1164 524a898e18999ceac864dbac5b85fa2f14392e389b3c32f77d58e2a89cdf01c4.exe 1164 524a898e18999ceac864dbac5b85fa2f14392e389b3c32f77d58e2a89cdf01c4.exe 1164 524a898e18999ceac864dbac5b85fa2f14392e389b3c32f77d58e2a89cdf01c4.exe 1164 524a898e18999ceac864dbac5b85fa2f14392e389b3c32f77d58e2a89cdf01c4.exe 1164 524a898e18999ceac864dbac5b85fa2f14392e389b3c32f77d58e2a89cdf01c4.exe 1164 524a898e18999ceac864dbac5b85fa2f14392e389b3c32f77d58e2a89cdf01c4.exe 1164 524a898e18999ceac864dbac5b85fa2f14392e389b3c32f77d58e2a89cdf01c4.exe 1164 524a898e18999ceac864dbac5b85fa2f14392e389b3c32f77d58e2a89cdf01c4.exe 1164 524a898e18999ceac864dbac5b85fa2f14392e389b3c32f77d58e2a89cdf01c4.exe 1164 524a898e18999ceac864dbac5b85fa2f14392e389b3c32f77d58e2a89cdf01c4.exe 1164 524a898e18999ceac864dbac5b85fa2f14392e389b3c32f77d58e2a89cdf01c4.exe 1164 524a898e18999ceac864dbac5b85fa2f14392e389b3c32f77d58e2a89cdf01c4.exe 1164 524a898e18999ceac864dbac5b85fa2f14392e389b3c32f77d58e2a89cdf01c4.exe 1164 524a898e18999ceac864dbac5b85fa2f14392e389b3c32f77d58e2a89cdf01c4.exe 1164 524a898e18999ceac864dbac5b85fa2f14392e389b3c32f77d58e2a89cdf01c4.exe 1164 524a898e18999ceac864dbac5b85fa2f14392e389b3c32f77d58e2a89cdf01c4.exe 1164 524a898e18999ceac864dbac5b85fa2f14392e389b3c32f77d58e2a89cdf01c4.exe 1164 524a898e18999ceac864dbac5b85fa2f14392e389b3c32f77d58e2a89cdf01c4.exe 1164 524a898e18999ceac864dbac5b85fa2f14392e389b3c32f77d58e2a89cdf01c4.exe 1164 524a898e18999ceac864dbac5b85fa2f14392e389b3c32f77d58e2a89cdf01c4.exe 1164 524a898e18999ceac864dbac5b85fa2f14392e389b3c32f77d58e2a89cdf01c4.exe 1164 524a898e18999ceac864dbac5b85fa2f14392e389b3c32f77d58e2a89cdf01c4.exe 1164 524a898e18999ceac864dbac5b85fa2f14392e389b3c32f77d58e2a89cdf01c4.exe 1164 524a898e18999ceac864dbac5b85fa2f14392e389b3c32f77d58e2a89cdf01c4.exe 4120 svchost.exe 4120 svchost.exe 4120 svchost.exe 4120 svchost.exe 4120 svchost.exe 4120 svchost.exe 4120 svchost.exe 4120 svchost.exe 4120 svchost.exe 4120 svchost.exe 4120 svchost.exe 4120 svchost.exe 4120 svchost.exe 4120 svchost.exe 4120 svchost.exe 4120 svchost.exe 4120 svchost.exe 4120 svchost.exe 4120 svchost.exe 4120 svchost.exe 4120 svchost.exe 4120 svchost.exe 4120 svchost.exe 4120 svchost.exe 4120 svchost.exe 4120 svchost.exe -
Suspicious use of AdjustPrivilegeToken 50 IoCs
description pid Process Token: SeDebugPrivilege 1164 524a898e18999ceac864dbac5b85fa2f14392e389b3c32f77d58e2a89cdf01c4.exe Token: SeDebugPrivilege 4120 svchost.exe Token: SeBackupPrivilege 3248 vssvc.exe Token: SeRestorePrivilege 3248 vssvc.exe Token: SeAuditPrivilege 3248 vssvc.exe Token: SeIncreaseQuotaPrivilege 3500 WMIC.exe Token: SeSecurityPrivilege 3500 WMIC.exe Token: SeTakeOwnershipPrivilege 3500 WMIC.exe Token: SeLoadDriverPrivilege 3500 WMIC.exe Token: SeSystemProfilePrivilege 3500 WMIC.exe Token: SeSystemtimePrivilege 3500 WMIC.exe Token: SeProfSingleProcessPrivilege 3500 WMIC.exe Token: SeIncBasePriorityPrivilege 3500 WMIC.exe Token: SeCreatePagefilePrivilege 3500 WMIC.exe Token: SeBackupPrivilege 3500 WMIC.exe Token: SeRestorePrivilege 3500 WMIC.exe Token: SeShutdownPrivilege 3500 WMIC.exe Token: SeDebugPrivilege 3500 WMIC.exe Token: SeSystemEnvironmentPrivilege 3500 WMIC.exe Token: SeRemoteShutdownPrivilege 3500 WMIC.exe Token: SeUndockPrivilege 3500 WMIC.exe Token: SeManageVolumePrivilege 3500 WMIC.exe Token: 33 3500 WMIC.exe Token: 34 3500 WMIC.exe Token: 35 3500 WMIC.exe Token: 36 3500 WMIC.exe Token: SeIncreaseQuotaPrivilege 3500 WMIC.exe Token: SeSecurityPrivilege 3500 WMIC.exe Token: SeTakeOwnershipPrivilege 3500 WMIC.exe Token: SeLoadDriverPrivilege 3500 WMIC.exe Token: SeSystemProfilePrivilege 3500 WMIC.exe Token: SeSystemtimePrivilege 3500 WMIC.exe Token: SeProfSingleProcessPrivilege 3500 WMIC.exe Token: SeIncBasePriorityPrivilege 3500 WMIC.exe Token: SeCreatePagefilePrivilege 3500 WMIC.exe Token: SeBackupPrivilege 3500 WMIC.exe Token: SeRestorePrivilege 3500 WMIC.exe Token: SeShutdownPrivilege 3500 WMIC.exe Token: SeDebugPrivilege 3500 WMIC.exe Token: SeSystemEnvironmentPrivilege 3500 WMIC.exe Token: SeRemoteShutdownPrivilege 3500 WMIC.exe Token: SeUndockPrivilege 3500 WMIC.exe Token: SeManageVolumePrivilege 3500 WMIC.exe Token: 33 3500 WMIC.exe Token: 34 3500 WMIC.exe Token: 35 3500 WMIC.exe Token: 36 3500 WMIC.exe Token: SeBackupPrivilege 5040 wbengine.exe Token: SeRestorePrivilege 5040 wbengine.exe Token: SeSecurityPrivilege 5040 wbengine.exe -
Suspicious use of WriteProcessMemory 20 IoCs
description pid Process procid_target PID 1164 wrote to memory of 4120 1164 524a898e18999ceac864dbac5b85fa2f14392e389b3c32f77d58e2a89cdf01c4.exe 98 PID 1164 wrote to memory of 4120 1164 524a898e18999ceac864dbac5b85fa2f14392e389b3c32f77d58e2a89cdf01c4.exe 98 PID 4120 wrote to memory of 3304 4120 svchost.exe 100 PID 4120 wrote to memory of 3304 4120 svchost.exe 100 PID 3304 wrote to memory of 4028 3304 cmd.exe 102 PID 3304 wrote to memory of 4028 3304 cmd.exe 102 PID 3304 wrote to memory of 3500 3304 cmd.exe 105 PID 3304 wrote to memory of 3500 3304 cmd.exe 105 PID 4120 wrote to memory of 2640 4120 svchost.exe 106 PID 4120 wrote to memory of 2640 4120 svchost.exe 106 PID 2640 wrote to memory of 1016 2640 cmd.exe 108 PID 2640 wrote to memory of 1016 2640 cmd.exe 108 PID 2640 wrote to memory of 992 2640 cmd.exe 109 PID 2640 wrote to memory of 992 2640 cmd.exe 109 PID 4120 wrote to memory of 212 4120 svchost.exe 110 PID 4120 wrote to memory of 212 4120 svchost.exe 110 PID 212 wrote to memory of 4676 212 cmd.exe 112 PID 212 wrote to memory of 4676 212 cmd.exe 112 PID 4120 wrote to memory of 2252 4120 svchost.exe 116 PID 4120 wrote to memory of 2252 4120 svchost.exe 116 -
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\524a898e18999ceac864dbac5b85fa2f14392e389b3c32f77d58e2a89cdf01c4.exe"C:\Users\Admin\AppData\Local\Temp\524a898e18999ceac864dbac5b85fa2f14392e389b3c32f77d58e2a89cdf01c4.exe"1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1164 -
C:\Users\Admin\AppData\Roaming\svchost.exe"C:\Users\Admin\AppData\Roaming\svchost.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:4120 -
C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C vssadmin delete shadows /all /quiet & wmic shadowcopy delete3⤵
- Suspicious use of WriteProcessMemory
PID:3304 -
C:\Windows\system32\vssadmin.exevssadmin delete shadows /all /quiet4⤵
- Interacts with shadow copies
PID:4028
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C:\Windows\System32\Wbem\WMIC.exewmic shadowcopy delete4⤵
- Suspicious use of AdjustPrivilegeToken
PID:3500
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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:2640 -
C:\Windows\system32\bcdedit.exebcdedit /set {default} bootstatuspolicy ignoreallfailures4⤵
- Modifies boot configuration data using bcdedit
PID:1016
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C:\Windows\system32\bcdedit.exebcdedit /set {default} recoveryenabled no4⤵
- Modifies boot configuration data using bcdedit
PID:992
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C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet3⤵
- Suspicious use of WriteProcessMemory
PID:212 -
C:\Windows\system32\wbadmin.exewbadmin delete catalog -quiet4⤵
- Deletes backup catalog
PID:4676
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C:\Windows\system32\NOTEPAD.EXE"C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\Leggimi.txt3⤵
- Opens file in notepad (likely ransom note)
PID:2252
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:3248
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C:\Windows\system32\wbengine.exe"C:\Windows\system32\wbengine.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
PID:5040
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C:\Windows\System32\vdsldr.exeC:\Windows\System32\vdsldr.exe -Embedding1⤵PID:2764
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C:\Windows\System32\vds.exeC:\Windows\System32\vds.exe1⤵
- Checks SCSI registry key(s)
PID:4872
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
3.2MB
MD5db5c28ec647afd894c01422584d551a5
SHA1fa0b5ebcb983509eebc7222725792976fad2aca8
SHA256524a898e18999ceac864dbac5b85fa2f14392e389b3c32f77d58e2a89cdf01c4
SHA512730054505deddeeefce4b1cc3b8ea362946e9e12ea289bc64285c0ce417d8964a767d03ccdf69ab4dd184d9888b9f3c1b51134cfb9c067861b5c1f4c06a3f67a
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Filesize
437B
MD59c5d9fd5db486b31324ad8eef0558c1b
SHA14d6e0b43ae59b8420730294d371118d6e429157f
SHA2561f2154533308355548ad3694f03cc1582bc0aa549173a5d11920ac38469d6f3b
SHA512b5c27756cbf8756dcfea07c6134e8711b61fcaa87360056609d65354e845adf2f00bc05140bf40044675b7c6cc7ef0b546bad3886a4cf34d12251570b49e80f7