Analysis
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max time kernel
94s -
max time network
95s -
platform
windows10-2004_x64 -
resource
win10v2004-20240426-en -
resource tags
arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system -
submitted
01-06-2024 14:05
Behavioral task
behavioral1
Sample
kache.exe
Resource
win7-20240215-en
windows7-x64
20 signatures
150 seconds
Behavioral task
behavioral2
Sample
kache.exe
Resource
win10v2004-20240426-en
windows10-2004-x64
23 signatures
150 seconds
General
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Target
kache.exe
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Size
22KB
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MD5
f086fab4e2d6de8255df5a06e0983f4a
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SHA1
501c65650b6815fd837f64ce398ff4d8382475e5
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SHA256
897be7be189a1e444c44535b7dd1f967ff7eb49bec25367efcbed724c76efffb
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SHA512
9c9ef27dc35f684a0d55f3202887a06ae8cb956e154795802034b9add97dbf5faf337680acb6fa96f3f2250cbe5f4f90caa47d9d43e550368b2b3d0403a40a53
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SSDEEP
384:e3Mg/bqo2v4Ahp2XTpFZ3OjvJsr91CSYvEe5:cqo2FaDpjOjBsr9W8e5
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/1396-1-0x0000000000620000-0x000000000062C000-memory.dmp family_chaos behavioral2/files/0x0004000000022a49-6.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 1684 bcdedit.exe 2140 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 4420 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-1-5-21-3571316656-3665257725-2415531812-1000\Control Panel\International\Geo\Nation kache.exe Key value queried \REGISTRY\USER\S-1-5-21-3571316656-3665257725-2415531812-1000\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\READ_ME.txt svchost.exe -
Executes dropped EXE 1 IoCs
pid Process 1988 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\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Desktop\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Downloads\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Favorites\Links\desktop.ini svchost.exe File opened for modification C:\Users\Admin\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\Public\Videos\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\Favorites\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Videos\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\SendTo\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\Links\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Music\desktop.ini svchost.exe File opened for modification C:\Users\Admin\OneDrive\desktop.ini svchost.exe File opened for modification C:\Users\Public\Documents\desktop.ini svchost.exe File opened for modification C:\Users\Public\Music\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\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 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-1-5-21-3571316656-3665257725-2415531812-1000\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Saved Games\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\Public\Pictures\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Contacts\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Pictures\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\Public\Desktop\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\Pictures\Saved Pictures\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Searches\desktop.ini 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 3600 vssadmin.exe -
Modifies registry class 1 IoCs
description ioc Process Key created \REGISTRY\USER\S-1-5-21-3571316656-3665257725-2415531812-1000_Classes\Local Settings svchost.exe -
Opens file in notepad (likely ransom note) 1 IoCs
pid Process 532 NOTEPAD.EXE -
Suspicious behavior: AddClipboardFormatListener 1 IoCs
pid Process 1988 svchost.exe -
Suspicious behavior: EnumeratesProcesses 47 IoCs
pid Process 1396 kache.exe 1396 kache.exe 1396 kache.exe 1396 kache.exe 1396 kache.exe 1396 kache.exe 1396 kache.exe 1396 kache.exe 1396 kache.exe 1396 kache.exe 1396 kache.exe 1396 kache.exe 1396 kache.exe 1396 kache.exe 1396 kache.exe 1396 kache.exe 1396 kache.exe 1396 kache.exe 1396 kache.exe 1396 kache.exe 1396 kache.exe 1396 kache.exe 1396 kache.exe 1988 svchost.exe 1988 svchost.exe 1988 svchost.exe 1988 svchost.exe 1988 svchost.exe 1988 svchost.exe 1988 svchost.exe 1988 svchost.exe 1988 svchost.exe 1988 svchost.exe 1988 svchost.exe 1988 svchost.exe 1988 svchost.exe 1988 svchost.exe 1988 svchost.exe 1988 svchost.exe 1988 svchost.exe 1988 svchost.exe 1988 svchost.exe 1988 svchost.exe 1988 svchost.exe 1988 svchost.exe 1988 svchost.exe 1988 svchost.exe -
Suspicious use of AdjustPrivilegeToken 50 IoCs
description pid Process Token: SeDebugPrivilege 1396 kache.exe Token: SeDebugPrivilege 1988 svchost.exe Token: SeBackupPrivilege 4068 vssvc.exe Token: SeRestorePrivilege 4068 vssvc.exe Token: SeAuditPrivilege 4068 vssvc.exe Token: SeIncreaseQuotaPrivilege 3988 WMIC.exe Token: SeSecurityPrivilege 3988 WMIC.exe Token: SeTakeOwnershipPrivilege 3988 WMIC.exe Token: SeLoadDriverPrivilege 3988 WMIC.exe Token: SeSystemProfilePrivilege 3988 WMIC.exe Token: SeSystemtimePrivilege 3988 WMIC.exe Token: SeProfSingleProcessPrivilege 3988 WMIC.exe Token: SeIncBasePriorityPrivilege 3988 WMIC.exe Token: SeCreatePagefilePrivilege 3988 WMIC.exe Token: SeBackupPrivilege 3988 WMIC.exe Token: SeRestorePrivilege 3988 WMIC.exe Token: SeShutdownPrivilege 3988 WMIC.exe Token: SeDebugPrivilege 3988 WMIC.exe Token: SeSystemEnvironmentPrivilege 3988 WMIC.exe Token: SeRemoteShutdownPrivilege 3988 WMIC.exe Token: SeUndockPrivilege 3988 WMIC.exe Token: SeManageVolumePrivilege 3988 WMIC.exe Token: 33 3988 WMIC.exe Token: 34 3988 WMIC.exe Token: 35 3988 WMIC.exe Token: 36 3988 WMIC.exe Token: SeIncreaseQuotaPrivilege 3988 WMIC.exe Token: SeSecurityPrivilege 3988 WMIC.exe Token: SeTakeOwnershipPrivilege 3988 WMIC.exe Token: SeLoadDriverPrivilege 3988 WMIC.exe Token: SeSystemProfilePrivilege 3988 WMIC.exe Token: SeSystemtimePrivilege 3988 WMIC.exe Token: SeProfSingleProcessPrivilege 3988 WMIC.exe Token: SeIncBasePriorityPrivilege 3988 WMIC.exe Token: SeCreatePagefilePrivilege 3988 WMIC.exe Token: SeBackupPrivilege 3988 WMIC.exe Token: SeRestorePrivilege 3988 WMIC.exe Token: SeShutdownPrivilege 3988 WMIC.exe Token: SeDebugPrivilege 3988 WMIC.exe Token: SeSystemEnvironmentPrivilege 3988 WMIC.exe Token: SeRemoteShutdownPrivilege 3988 WMIC.exe Token: SeUndockPrivilege 3988 WMIC.exe Token: SeManageVolumePrivilege 3988 WMIC.exe Token: 33 3988 WMIC.exe Token: 34 3988 WMIC.exe Token: 35 3988 WMIC.exe Token: 36 3988 WMIC.exe Token: SeBackupPrivilege 920 wbengine.exe Token: SeRestorePrivilege 920 wbengine.exe Token: SeSecurityPrivilege 920 wbengine.exe -
Suspicious use of FindShellTrayWindow 1 IoCs
pid Process 532 NOTEPAD.EXE -
Suspicious use of WriteProcessMemory 20 IoCs
description pid Process procid_target PID 1396 wrote to memory of 1988 1396 kache.exe 86 PID 1396 wrote to memory of 1988 1396 kache.exe 86 PID 1988 wrote to memory of 4172 1988 svchost.exe 93 PID 1988 wrote to memory of 4172 1988 svchost.exe 93 PID 4172 wrote to memory of 3600 4172 cmd.exe 95 PID 4172 wrote to memory of 3600 4172 cmd.exe 95 PID 4172 wrote to memory of 3988 4172 cmd.exe 98 PID 4172 wrote to memory of 3988 4172 cmd.exe 98 PID 1988 wrote to memory of 2040 1988 svchost.exe 99 PID 1988 wrote to memory of 2040 1988 svchost.exe 99 PID 2040 wrote to memory of 1684 2040 cmd.exe 101 PID 2040 wrote to memory of 1684 2040 cmd.exe 101 PID 2040 wrote to memory of 2140 2040 cmd.exe 102 PID 2040 wrote to memory of 2140 2040 cmd.exe 102 PID 1988 wrote to memory of 2184 1988 svchost.exe 103 PID 1988 wrote to memory of 2184 1988 svchost.exe 103 PID 2184 wrote to memory of 4420 2184 cmd.exe 105 PID 2184 wrote to memory of 4420 2184 cmd.exe 105 PID 1988 wrote to memory of 532 1988 svchost.exe 109 PID 1988 wrote to memory of 532 1988 svchost.exe 109 -
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\kache.exe"C:\Users\Admin\AppData\Local\Temp\kache.exe"1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1396 -
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)
- Modifies registry class
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1988 -
C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C vssadmin delete shadows /all /quiet & wmic shadowcopy delete3⤵
- Suspicious use of WriteProcessMemory
PID:4172 -
C:\Windows\system32\vssadmin.exevssadmin delete shadows /all /quiet4⤵
- Interacts with shadow copies
PID:3600
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C:\Windows\System32\Wbem\WMIC.exewmic shadowcopy delete4⤵
- Suspicious use of AdjustPrivilegeToken
PID:3988
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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:2040 -
C:\Windows\system32\bcdedit.exebcdedit /set {default} bootstatuspolicy ignoreallfailures4⤵
- Modifies boot configuration data using bcdedit
PID:1684
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C:\Windows\system32\bcdedit.exebcdedit /set {default} recoveryenabled no4⤵
- Modifies boot configuration data using bcdedit
PID:2140
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C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet3⤵
- Suspicious use of WriteProcessMemory
PID:2184 -
C:\Windows\system32\wbadmin.exewbadmin delete catalog -quiet4⤵
- Deletes backup catalog
PID:4420
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C:\Windows\system32\NOTEPAD.EXE"C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\READ_ME.txt3⤵
- Opens file in notepad (likely ransom note)
- Suspicious use of FindShellTrayWindow
PID:532
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:4068
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C:\Windows\system32\wbengine.exe"C:\Windows\system32\wbengine.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
PID:920
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C:\Windows\System32\vdsldr.exeC:\Windows\System32\vdsldr.exe -Embedding1⤵PID:4496
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C:\Windows\System32\vds.exeC:\Windows\System32\vds.exe1⤵
- Checks SCSI registry key(s)
PID:1936
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
22KB
MD5f086fab4e2d6de8255df5a06e0983f4a
SHA1501c65650b6815fd837f64ce398ff4d8382475e5
SHA256897be7be189a1e444c44535b7dd1f967ff7eb49bec25367efcbed724c76efffb
SHA5129c9ef27dc35f684a0d55f3202887a06ae8cb956e154795802034b9add97dbf5faf337680acb6fa96f3f2250cbe5f4f90caa47d9d43e550368b2b3d0403a40a53
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Filesize
67B
MD5a72ae082b265f256a2a53a8652a356f3
SHA16036049c9bd13bf8a68d92682edd8b0dfa5ea62e
SHA256b0303a6a7a6ae276d3aaa16480b14e2cd549e382c21fb80506782186010ef0eb
SHA512ac464dd9e7cd5298e2278d592965a863c4489f0a5b45a63929d2b179cd5a7ef9b9b194a3771e0b731cc52154276535008ee03469f31ec144249aebef4ce552c2