Analysis
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max time kernel
147s -
max time network
153s -
platform
windows10-2004_x64 -
resource
win10v2004-20240226-en -
resource tags
arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system -
submitted
01-06-2024 14:10
Behavioral task
behavioral1
Sample
kache.exe
Resource
win7-20240221-en
windows7-x64
20 signatures
150 seconds
Behavioral task
behavioral2
Sample
kache.exe
Resource
win10v2004-20240226-en
windows10-2004-x64
23 signatures
150 seconds
General
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Target
kache.exe
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Size
506KB
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MD5
03b0db0d3c3ce0f7c19e88219b296922
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SHA1
c950bd85b8d302307654fdc848329b4a58cf3949
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SHA256
c127022b5b4f3b93311a1f13c660324da03e0dfa698c4c0a9656cd2863c28160
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SHA512
d99c946e98c82c9cc4191959b3c016af1885fac9275156499f442b162613c538f0f9f4d3776ad1e040bfd33cbe1d216808356ec1528f1b19eb6c10ded4d47cb6
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SSDEEP
12288:HX4GQOqb2ciwew/IFR9AILH0PhDieMlMK2j9mI4ygA2Vv95uekHKe:RsZJK2f6U
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/732-1-0x0000000000730000-0x00000000007B4000-memory.dmp family_chaos behavioral2/files/0x0008000000023264-6.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 2704 bcdedit.exe 4036 bcdedit.exe -
Renames multiple (181) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
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pid Process 2980 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-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation kache.exe Key value queried \REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\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 4076 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\Windows\AccountPictures\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\Public\Music\desktop.ini svchost.exe File opened for modification F:\$RECYCLE.BIN\S-1-5-21-3808065738-1666277613-1125846146-1000\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Desktop\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\Start Menu\Programs\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\Favorites\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\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\Documents\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Saved Games\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Searches\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\Internet Explorer\Quick Launch\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\Music\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Favorites\Links\desktop.ini svchost.exe File opened for modification C:\Users\Public\Desktop\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\Public\Documents\desktop.ini svchost.exe File opened for modification C:\Users\Public\Videos\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\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\System Tools\Desktop.ini svchost.exe File opened for modification C:\Users\Admin\Links\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\Recent\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Downloads\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\SendTo\desktop.ini svchost.exe -
Sets desktop wallpaper using registry 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\0ot713065.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_DADY&PROD_DADY_DVD-ROM\4&215468A5&0&010000 vds.exe Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\CdRom&Ven_DADY&Prod_DADY_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 3132 vssadmin.exe -
Modifies registry class 1 IoCs
description ioc Process Key created \REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000_Classes\Local Settings svchost.exe -
Opens file in notepad (likely ransom note) 1 IoCs
pid Process 5028 NOTEPAD.EXE -
Suspicious behavior: AddClipboardFormatListener 1 IoCs
pid Process 4076 svchost.exe -
Suspicious behavior: EnumeratesProcesses 47 IoCs
pid Process 732 kache.exe 732 kache.exe 732 kache.exe 732 kache.exe 732 kache.exe 732 kache.exe 732 kache.exe 732 kache.exe 732 kache.exe 732 kache.exe 732 kache.exe 732 kache.exe 732 kache.exe 732 kache.exe 732 kache.exe 732 kache.exe 732 kache.exe 732 kache.exe 732 kache.exe 732 kache.exe 732 kache.exe 732 kache.exe 732 kache.exe 4076 svchost.exe 4076 svchost.exe 4076 svchost.exe 4076 svchost.exe 4076 svchost.exe 4076 svchost.exe 4076 svchost.exe 4076 svchost.exe 4076 svchost.exe 4076 svchost.exe 4076 svchost.exe 4076 svchost.exe 4076 svchost.exe 4076 svchost.exe 4076 svchost.exe 4076 svchost.exe 4076 svchost.exe 4076 svchost.exe 4076 svchost.exe 4076 svchost.exe 4076 svchost.exe 4076 svchost.exe 4076 svchost.exe 4076 svchost.exe -
Suspicious use of AdjustPrivilegeToken 50 IoCs
description pid Process Token: SeDebugPrivilege 732 kache.exe Token: SeDebugPrivilege 4076 svchost.exe Token: SeBackupPrivilege 3124 vssvc.exe Token: SeRestorePrivilege 3124 vssvc.exe Token: SeAuditPrivilege 3124 vssvc.exe Token: SeIncreaseQuotaPrivilege 2012 WMIC.exe Token: SeSecurityPrivilege 2012 WMIC.exe Token: SeTakeOwnershipPrivilege 2012 WMIC.exe Token: SeLoadDriverPrivilege 2012 WMIC.exe Token: SeSystemProfilePrivilege 2012 WMIC.exe Token: SeSystemtimePrivilege 2012 WMIC.exe Token: SeProfSingleProcessPrivilege 2012 WMIC.exe Token: SeIncBasePriorityPrivilege 2012 WMIC.exe Token: SeCreatePagefilePrivilege 2012 WMIC.exe Token: SeBackupPrivilege 2012 WMIC.exe Token: SeRestorePrivilege 2012 WMIC.exe Token: SeShutdownPrivilege 2012 WMIC.exe Token: SeDebugPrivilege 2012 WMIC.exe Token: SeSystemEnvironmentPrivilege 2012 WMIC.exe Token: SeRemoteShutdownPrivilege 2012 WMIC.exe Token: SeUndockPrivilege 2012 WMIC.exe Token: SeManageVolumePrivilege 2012 WMIC.exe Token: 33 2012 WMIC.exe Token: 34 2012 WMIC.exe Token: 35 2012 WMIC.exe Token: 36 2012 WMIC.exe Token: SeIncreaseQuotaPrivilege 2012 WMIC.exe Token: SeSecurityPrivilege 2012 WMIC.exe Token: SeTakeOwnershipPrivilege 2012 WMIC.exe Token: SeLoadDriverPrivilege 2012 WMIC.exe Token: SeSystemProfilePrivilege 2012 WMIC.exe Token: SeSystemtimePrivilege 2012 WMIC.exe Token: SeProfSingleProcessPrivilege 2012 WMIC.exe Token: SeIncBasePriorityPrivilege 2012 WMIC.exe Token: SeCreatePagefilePrivilege 2012 WMIC.exe Token: SeBackupPrivilege 2012 WMIC.exe Token: SeRestorePrivilege 2012 WMIC.exe Token: SeShutdownPrivilege 2012 WMIC.exe Token: SeDebugPrivilege 2012 WMIC.exe Token: SeSystemEnvironmentPrivilege 2012 WMIC.exe Token: SeRemoteShutdownPrivilege 2012 WMIC.exe Token: SeUndockPrivilege 2012 WMIC.exe Token: SeManageVolumePrivilege 2012 WMIC.exe Token: 33 2012 WMIC.exe Token: 34 2012 WMIC.exe Token: 35 2012 WMIC.exe Token: 36 2012 WMIC.exe Token: SeBackupPrivilege 620 wbengine.exe Token: SeRestorePrivilege 620 wbengine.exe Token: SeSecurityPrivilege 620 wbengine.exe -
Suspicious use of WriteProcessMemory 20 IoCs
description pid Process procid_target PID 732 wrote to memory of 4076 732 kache.exe 92 PID 732 wrote to memory of 4076 732 kache.exe 92 PID 4076 wrote to memory of 4864 4076 svchost.exe 95 PID 4076 wrote to memory of 4864 4076 svchost.exe 95 PID 4864 wrote to memory of 3132 4864 cmd.exe 97 PID 4864 wrote to memory of 3132 4864 cmd.exe 97 PID 4864 wrote to memory of 2012 4864 cmd.exe 102 PID 4864 wrote to memory of 2012 4864 cmd.exe 102 PID 4076 wrote to memory of 4592 4076 svchost.exe 104 PID 4076 wrote to memory of 4592 4076 svchost.exe 104 PID 4592 wrote to memory of 2704 4592 cmd.exe 106 PID 4592 wrote to memory of 2704 4592 cmd.exe 106 PID 4592 wrote to memory of 4036 4592 cmd.exe 107 PID 4592 wrote to memory of 4036 4592 cmd.exe 107 PID 4076 wrote to memory of 3216 4076 svchost.exe 108 PID 4076 wrote to memory of 3216 4076 svchost.exe 108 PID 3216 wrote to memory of 2980 3216 cmd.exe 111 PID 3216 wrote to memory of 2980 3216 cmd.exe 111 PID 4076 wrote to memory of 5028 4076 svchost.exe 115 PID 4076 wrote to memory of 5028 4076 svchost.exe 115 -
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:732 -
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:4076 -
C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C vssadmin delete shadows /all /quiet & wmic shadowcopy delete3⤵
- Suspicious use of WriteProcessMemory
PID:4864 -
C:\Windows\system32\vssadmin.exevssadmin delete shadows /all /quiet4⤵
- Interacts with shadow copies
PID:3132
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C:\Windows\System32\Wbem\WMIC.exewmic shadowcopy delete4⤵
- Suspicious use of AdjustPrivilegeToken
PID:2012
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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:4592 -
C:\Windows\system32\bcdedit.exebcdedit /set {default} bootstatuspolicy ignoreallfailures4⤵
- Modifies boot configuration data using bcdedit
PID:2704
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C:\Windows\system32\bcdedit.exebcdedit /set {default} recoveryenabled no4⤵
- Modifies boot configuration data using bcdedit
PID:4036
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C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet3⤵
- Suspicious use of WriteProcessMemory
PID:3216 -
C:\Windows\system32\wbadmin.exewbadmin delete catalog -quiet4⤵
- Deletes backup catalog
PID:2980
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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)
PID:5028
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:3124
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C:\Windows\system32\wbengine.exe"C:\Windows\system32\wbengine.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
PID:620
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C:\Windows\System32\vdsldr.exeC:\Windows\System32\vdsldr.exe -Embedding1⤵PID:4852
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C:\Windows\System32\vds.exeC:\Windows\System32\vds.exe1⤵
- Checks SCSI registry key(s)
PID:4484
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C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=1516 --field-trial-handle=2292,i,2103142837140538807,15881446839139365070,262144 --variations-seed-version /prefetch:81⤵PID:1168
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
506KB
MD503b0db0d3c3ce0f7c19e88219b296922
SHA1c950bd85b8d302307654fdc848329b4a58cf3949
SHA256c127022b5b4f3b93311a1f13c660324da03e0dfa698c4c0a9656cd2863c28160
SHA512d99c946e98c82c9cc4191959b3c016af1885fac9275156499f442b162613c538f0f9f4d3776ad1e040bfd33cbe1d216808356ec1528f1b19eb6c10ded4d47cb6
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Filesize
67B
MD5a72ae082b265f256a2a53a8652a356f3
SHA16036049c9bd13bf8a68d92682edd8b0dfa5ea62e
SHA256b0303a6a7a6ae276d3aaa16480b14e2cd549e382c21fb80506782186010ef0eb
SHA512ac464dd9e7cd5298e2278d592965a863c4489f0a5b45a63929d2b179cd5a7ef9b9b194a3771e0b731cc52154276535008ee03469f31ec144249aebef4ce552c2