Analysis
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max time kernel
477s -
max time network
591s -
platform
windows10-2004_x64 -
resource
win10v2004-20230915-en -
resource tags
arch:x64arch:x86image:win10v2004-20230915-enlocale:en-usos:windows10-2004-x64system -
submitted
26/09/2023, 23:38
Behavioral task
behavioral1
Sample
902b16b11fc262b96d921f00f96bc83b0a302dc02829e14b17a8227e0e49d3c5.exe
Resource
win7-20230831-en
Behavioral task
behavioral2
Sample
902b16b11fc262b96d921f00f96bc83b0a302dc02829e14b17a8227e0e49d3c5.exe
Resource
win10v2004-20230915-en
General
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Target
902b16b11fc262b96d921f00f96bc83b0a302dc02829e14b17a8227e0e49d3c5.exe
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Size
55KB
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MD5
04fe14d0256c71c7ef0173c1bac2d407
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SHA1
b4972cbff4112fa1623e1921bb85dec39f923d2b
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SHA256
902b16b11fc262b96d921f00f96bc83b0a302dc02829e14b17a8227e0e49d3c5
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SHA512
166ab82d5c16f100405730a212ef4b7ebd21d4e5ac753f205e67c53068a35f3f2a28475d1e805c02f42c32425b8c53910b8d5b585dc3efe2e4536a7603c03a84
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SSDEEP
1536:eo2mQ1r9WekrJqzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzs:eolQ1r9WF9hF
Malware Config
Signatures
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Chaos
Ransomware family first seen in June 2021.
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Chaos Ransomware 4 IoCs
resource yara_rule behavioral2/memory/4236-0-0x0000000000D00000-0x0000000000D14000-memory.dmp family_chaos behavioral2/files/0x000a00000002311c-6.dat family_chaos behavioral2/files/0x000a00000002311c-11.dat family_chaos behavioral2/files/0x000a00000002311c-12.dat family_chaos -
Deletes shadow copies 2 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 4720 bcdedit.exe 4544 bcdedit.exe -
Renames multiple (88) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
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pid Process 2752 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-1-5-21-1045988481-1457812719-2617974652-1000\Control Panel\International\Geo\Nation 902b16b11fc262b96d921f00f96bc83b0a302dc02829e14b17a8227e0e49d3c5.exe Key value queried \REGISTRY\USER\S-1-5-21-1045988481-1457812719-2617974652-1000\Control Panel\International\Geo\Nation svchost.exe -
Drops startup file 1 IoCs
description ioc Process File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.url svchost.exe -
Executes dropped EXE 1 IoCs
pid Process 3348 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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Sets desktop wallpaper using registry 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-1045988481-1457812719-2617974652-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\d0o6v9yrs.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 4008 vssadmin.exe -
Modifies registry class 1 IoCs
description ioc Process Key created \REGISTRY\USER\S-1-5-21-1045988481-1457812719-2617974652-1000_Classes\Local Settings svchost.exe -
Opens file in notepad (likely ransom note) 1 IoCs
pid Process 1716 NOTEPAD.EXE -
Suspicious behavior: AddClipboardFormatListener 1 IoCs
pid Process 3348 svchost.exe -
Suspicious behavior: EnumeratesProcesses 49 IoCs
pid Process 4236 902b16b11fc262b96d921f00f96bc83b0a302dc02829e14b17a8227e0e49d3c5.exe 4236 902b16b11fc262b96d921f00f96bc83b0a302dc02829e14b17a8227e0e49d3c5.exe 4236 902b16b11fc262b96d921f00f96bc83b0a302dc02829e14b17a8227e0e49d3c5.exe 4236 902b16b11fc262b96d921f00f96bc83b0a302dc02829e14b17a8227e0e49d3c5.exe 4236 902b16b11fc262b96d921f00f96bc83b0a302dc02829e14b17a8227e0e49d3c5.exe 4236 902b16b11fc262b96d921f00f96bc83b0a302dc02829e14b17a8227e0e49d3c5.exe 4236 902b16b11fc262b96d921f00f96bc83b0a302dc02829e14b17a8227e0e49d3c5.exe 4236 902b16b11fc262b96d921f00f96bc83b0a302dc02829e14b17a8227e0e49d3c5.exe 4236 902b16b11fc262b96d921f00f96bc83b0a302dc02829e14b17a8227e0e49d3c5.exe 4236 902b16b11fc262b96d921f00f96bc83b0a302dc02829e14b17a8227e0e49d3c5.exe 4236 902b16b11fc262b96d921f00f96bc83b0a302dc02829e14b17a8227e0e49d3c5.exe 4236 902b16b11fc262b96d921f00f96bc83b0a302dc02829e14b17a8227e0e49d3c5.exe 4236 902b16b11fc262b96d921f00f96bc83b0a302dc02829e14b17a8227e0e49d3c5.exe 4236 902b16b11fc262b96d921f00f96bc83b0a302dc02829e14b17a8227e0e49d3c5.exe 4236 902b16b11fc262b96d921f00f96bc83b0a302dc02829e14b17a8227e0e49d3c5.exe 4236 902b16b11fc262b96d921f00f96bc83b0a302dc02829e14b17a8227e0e49d3c5.exe 4236 902b16b11fc262b96d921f00f96bc83b0a302dc02829e14b17a8227e0e49d3c5.exe 4236 902b16b11fc262b96d921f00f96bc83b0a302dc02829e14b17a8227e0e49d3c5.exe 4236 902b16b11fc262b96d921f00f96bc83b0a302dc02829e14b17a8227e0e49d3c5.exe 4236 902b16b11fc262b96d921f00f96bc83b0a302dc02829e14b17a8227e0e49d3c5.exe 4236 902b16b11fc262b96d921f00f96bc83b0a302dc02829e14b17a8227e0e49d3c5.exe 4236 902b16b11fc262b96d921f00f96bc83b0a302dc02829e14b17a8227e0e49d3c5.exe 4236 902b16b11fc262b96d921f00f96bc83b0a302dc02829e14b17a8227e0e49d3c5.exe 3348 svchost.exe 3348 svchost.exe 3348 svchost.exe 3348 svchost.exe 3348 svchost.exe 3348 svchost.exe 3348 svchost.exe 3348 svchost.exe 3348 svchost.exe 3348 svchost.exe 3348 svchost.exe 3348 svchost.exe 3348 svchost.exe 3348 svchost.exe 3348 svchost.exe 3348 svchost.exe 3348 svchost.exe 3348 svchost.exe 3348 svchost.exe 3348 svchost.exe 3348 svchost.exe 3348 svchost.exe 3348 svchost.exe 3348 svchost.exe 3348 svchost.exe 3348 svchost.exe -
Suspicious use of AdjustPrivilegeToken 50 IoCs
description pid Process Token: SeDebugPrivilege 4236 902b16b11fc262b96d921f00f96bc83b0a302dc02829e14b17a8227e0e49d3c5.exe Token: SeDebugPrivilege 3348 svchost.exe Token: SeBackupPrivilege 4572 vssvc.exe Token: SeRestorePrivilege 4572 vssvc.exe Token: SeAuditPrivilege 4572 vssvc.exe Token: SeIncreaseQuotaPrivilege 3464 WMIC.exe Token: SeSecurityPrivilege 3464 WMIC.exe Token: SeTakeOwnershipPrivilege 3464 WMIC.exe Token: SeLoadDriverPrivilege 3464 WMIC.exe Token: SeSystemProfilePrivilege 3464 WMIC.exe Token: SeSystemtimePrivilege 3464 WMIC.exe Token: SeProfSingleProcessPrivilege 3464 WMIC.exe Token: SeIncBasePriorityPrivilege 3464 WMIC.exe Token: SeCreatePagefilePrivilege 3464 WMIC.exe Token: SeBackupPrivilege 3464 WMIC.exe Token: SeRestorePrivilege 3464 WMIC.exe Token: SeShutdownPrivilege 3464 WMIC.exe Token: SeDebugPrivilege 3464 WMIC.exe Token: SeSystemEnvironmentPrivilege 3464 WMIC.exe Token: SeRemoteShutdownPrivilege 3464 WMIC.exe Token: SeUndockPrivilege 3464 WMIC.exe Token: SeManageVolumePrivilege 3464 WMIC.exe Token: 33 3464 WMIC.exe Token: 34 3464 WMIC.exe Token: 35 3464 WMIC.exe Token: 36 3464 WMIC.exe Token: SeIncreaseQuotaPrivilege 3464 WMIC.exe Token: SeSecurityPrivilege 3464 WMIC.exe Token: SeTakeOwnershipPrivilege 3464 WMIC.exe Token: SeLoadDriverPrivilege 3464 WMIC.exe Token: SeSystemProfilePrivilege 3464 WMIC.exe Token: SeSystemtimePrivilege 3464 WMIC.exe Token: SeProfSingleProcessPrivilege 3464 WMIC.exe Token: SeIncBasePriorityPrivilege 3464 WMIC.exe Token: SeCreatePagefilePrivilege 3464 WMIC.exe Token: SeBackupPrivilege 3464 WMIC.exe Token: SeRestorePrivilege 3464 WMIC.exe Token: SeShutdownPrivilege 3464 WMIC.exe Token: SeDebugPrivilege 3464 WMIC.exe Token: SeSystemEnvironmentPrivilege 3464 WMIC.exe Token: SeRemoteShutdownPrivilege 3464 WMIC.exe Token: SeUndockPrivilege 3464 WMIC.exe Token: SeManageVolumePrivilege 3464 WMIC.exe Token: 33 3464 WMIC.exe Token: 34 3464 WMIC.exe Token: 35 3464 WMIC.exe Token: 36 3464 WMIC.exe Token: SeBackupPrivilege 4736 wbengine.exe Token: SeRestorePrivilege 4736 wbengine.exe Token: SeSecurityPrivilege 4736 wbengine.exe -
Suspicious use of WriteProcessMemory 20 IoCs
description pid Process procid_target PID 4236 wrote to memory of 3348 4236 902b16b11fc262b96d921f00f96bc83b0a302dc02829e14b17a8227e0e49d3c5.exe 91 PID 4236 wrote to memory of 3348 4236 902b16b11fc262b96d921f00f96bc83b0a302dc02829e14b17a8227e0e49d3c5.exe 91 PID 3348 wrote to memory of 3504 3348 svchost.exe 96 PID 3348 wrote to memory of 3504 3348 svchost.exe 96 PID 3504 wrote to memory of 4008 3504 cmd.exe 98 PID 3504 wrote to memory of 4008 3504 cmd.exe 98 PID 3504 wrote to memory of 3464 3504 cmd.exe 101 PID 3504 wrote to memory of 3464 3504 cmd.exe 101 PID 3348 wrote to memory of 4492 3348 svchost.exe 102 PID 3348 wrote to memory of 4492 3348 svchost.exe 102 PID 4492 wrote to memory of 4720 4492 cmd.exe 104 PID 4492 wrote to memory of 4720 4492 cmd.exe 104 PID 4492 wrote to memory of 4544 4492 cmd.exe 105 PID 4492 wrote to memory of 4544 4492 cmd.exe 105 PID 3348 wrote to memory of 3932 3348 svchost.exe 106 PID 3348 wrote to memory of 3932 3348 svchost.exe 106 PID 3932 wrote to memory of 2752 3932 cmd.exe 108 PID 3932 wrote to memory of 2752 3932 cmd.exe 108 PID 3348 wrote to memory of 1716 3348 svchost.exe 114 PID 3348 wrote to memory of 1716 3348 svchost.exe 114 -
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\902b16b11fc262b96d921f00f96bc83b0a302dc02829e14b17a8227e0e49d3c5.exe"C:\Users\Admin\AppData\Local\Temp\902b16b11fc262b96d921f00f96bc83b0a302dc02829e14b17a8227e0e49d3c5.exe"1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4236 -
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
- Sets desktop wallpaper using registry
- Modifies registry class
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3348 -
C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C vssadmin delete shadows /all /quiet & wmic shadowcopy delete3⤵
- Suspicious use of WriteProcessMemory
PID:3504 -
C:\Windows\system32\vssadmin.exevssadmin delete shadows /all /quiet4⤵
- Interacts with shadow copies
PID:4008
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C:\Windows\System32\Wbem\WMIC.exewmic shadowcopy delete4⤵
- Suspicious use of AdjustPrivilegeToken
PID:3464
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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:4492 -
C:\Windows\system32\bcdedit.exebcdedit /set {default} bootstatuspolicy ignoreallfailures4⤵
- Modifies boot configuration data using bcdedit
PID:4720
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C:\Windows\system32\bcdedit.exebcdedit /set {default} recoveryenabled no4⤵
- Modifies boot configuration data using bcdedit
PID:4544
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C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet3⤵
- Suspicious use of WriteProcessMemory
PID:3932 -
C:\Windows\system32\wbadmin.exewbadmin delete catalog -quiet4⤵
- Deletes backup catalog
PID:2752
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C:\Windows\system32\NOTEPAD.EXE"C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\NIGHT_CROW_RECOVERY.txt3⤵
- Opens file in notepad (likely ransom note)
PID:1716
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:4572
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C:\Windows\system32\wbengine.exe"C:\Windows\system32\wbengine.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
PID:4736
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C:\Windows\System32\vdsldr.exeC:\Windows\System32\vdsldr.exe -Embedding1⤵PID:4600
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C:\Windows\System32\vds.exeC:\Windows\System32\vds.exe1⤵
- Checks SCSI registry key(s)
PID:4744
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
603B
MD5641c3eaed2ac13a0ec65a2d3754da95f
SHA130ff5e7c82530a2c07517e2fd1d93425fed23f8d
SHA2569e9c33a98c4fd44dfa3ab8ae450e22fc059d960ae5920894bba7ffd9bf41f445
SHA51213ff44284e85ccf99adcd0923282f7c0d7fe3bb298072242c00a688304560e09be720de0e6ddbbe6966b94022afd85362757e9678e51eddb71dd3184e0bcc5f9
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Filesize
55KB
MD504fe14d0256c71c7ef0173c1bac2d407
SHA1b4972cbff4112fa1623e1921bb85dec39f923d2b
SHA256902b16b11fc262b96d921f00f96bc83b0a302dc02829e14b17a8227e0e49d3c5
SHA512166ab82d5c16f100405730a212ef4b7ebd21d4e5ac753f205e67c53068a35f3f2a28475d1e805c02f42c32425b8c53910b8d5b585dc3efe2e4536a7603c03a84
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Filesize
55KB
MD504fe14d0256c71c7ef0173c1bac2d407
SHA1b4972cbff4112fa1623e1921bb85dec39f923d2b
SHA256902b16b11fc262b96d921f00f96bc83b0a302dc02829e14b17a8227e0e49d3c5
SHA512166ab82d5c16f100405730a212ef4b7ebd21d4e5ac753f205e67c53068a35f3f2a28475d1e805c02f42c32425b8c53910b8d5b585dc3efe2e4536a7603c03a84
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Filesize
55KB
MD504fe14d0256c71c7ef0173c1bac2d407
SHA1b4972cbff4112fa1623e1921bb85dec39f923d2b
SHA256902b16b11fc262b96d921f00f96bc83b0a302dc02829e14b17a8227e0e49d3c5
SHA512166ab82d5c16f100405730a212ef4b7ebd21d4e5ac753f205e67c53068a35f3f2a28475d1e805c02f42c32425b8c53910b8d5b585dc3efe2e4536a7603c03a84
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Filesize
603B
MD5641c3eaed2ac13a0ec65a2d3754da95f
SHA130ff5e7c82530a2c07517e2fd1d93425fed23f8d
SHA2569e9c33a98c4fd44dfa3ab8ae450e22fc059d960ae5920894bba7ffd9bf41f445
SHA51213ff44284e85ccf99adcd0923282f7c0d7fe3bb298072242c00a688304560e09be720de0e6ddbbe6966b94022afd85362757e9678e51eddb71dd3184e0bcc5f9