Analysis
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max time kernel
148s -
max time network
151s -
platform
windows10-2004_x64 -
resource
win10v2004-20240802-en -
resource tags
arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system -
submitted
19-09-2024 03:35
Behavioral task
behavioral1
Sample
2024-09-19_a264ca73aaced0a81a0b7fa14bc201f4_chaos_destroyer_wannacry.exe
Resource
win7-20240903-en
Behavioral task
behavioral2
Sample
2024-09-19_a264ca73aaced0a81a0b7fa14bc201f4_chaos_destroyer_wannacry.exe
Resource
win10v2004-20240802-en
General
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Target
2024-09-19_a264ca73aaced0a81a0b7fa14bc201f4_chaos_destroyer_wannacry.exe
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Size
23KB
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MD5
a264ca73aaced0a81a0b7fa14bc201f4
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SHA1
77a1624cbc6d2d5066f7e23b42f05fd2703fb394
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SHA256
5404595684deb101a7d8d6a11c104dc1401151149f69cb9a60ebb223b6f7e5b2
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SHA512
d141ce0021b3352a79eb1401401f072e25fa06773ed567b9922d99967740e07a88e5d5b1daa77a61d9f8a53b51a36441c8e3c1a00a25de203ad05d82b1929ed4
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SSDEEP
384:y3Mg/bqo21q5D+WVZfpKkLOjXJ/r91CCAiMbdLej:Iqo2Sy6ptOjZ/r9BAiMblej
Malware Config
Extracted
C:\Users\Admin\Documents\READ_THIS.txt
chaos
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/4072-1-0x0000000000030000-0x000000000003C000-memory.dmp family_chaos behavioral2/files/0x0008000000023452-6.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 4896 bcdedit.exe 396 bcdedit.exe -
pid Process 2040 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-1-5-21-656926755-4116854191-210765258-1000\Control Panel\International\Geo\Nation 2024-09-19_a264ca73aaced0a81a0b7fa14bc201f4_chaos_destroyer_wannacry.exe Key value queried \REGISTRY\USER\S-1-5-21-656926755-4116854191-210765258-1000\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_THIS.txt svchost.exe -
Executes dropped EXE 1 IoCs
pid Process 880 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\Camera Roll\desktop.ini svchost.exe File opened for modification C:\Users\Admin\OneDrive\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Favorites\Links\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\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\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\Maintenance\Desktop.ini svchost.exe File opened for modification C:\Users\Public\Pictures\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Saved Games\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\AccountPictures\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\Desktop\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\Admin\AppData\Roaming\Microsoft\Windows\SendTo\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\Contacts\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Downloads\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\AppData\Roaming\Microsoft\Windows\Recent\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Desktop\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Documents\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Pictures\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Music\desktop.ini svchost.exe File opened for modification F:\$RECYCLE.BIN\S-1-5-21-656926755-4116854191-210765258-1000\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\AppData\Roaming\Microsoft\Windows\Start Menu\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\Public\Documents\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_WDC&PROD_WDS100T2B0A\4&215468A5&0&000000 vds.exe Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_WDC&Prod_WDS100T2B0A\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 3 TTPs 1 IoCs
Shadow copies are often targeted by ransomware to inhibit system recovery.
pid Process 1636 vssadmin.exe -
Modifies registry class 1 IoCs
description ioc Process Key created \REGISTRY\USER\S-1-5-21-656926755-4116854191-210765258-1000_Classes\Local Settings svchost.exe -
Opens file in notepad (likely ransom note) 1 IoCs
pid Process 1824 NOTEPAD.EXE -
Suspicious behavior: AddClipboardFormatListener 1 IoCs
pid Process 880 svchost.exe -
Suspicious behavior: EnumeratesProcesses 49 IoCs
pid Process 4072 2024-09-19_a264ca73aaced0a81a0b7fa14bc201f4_chaos_destroyer_wannacry.exe 4072 2024-09-19_a264ca73aaced0a81a0b7fa14bc201f4_chaos_destroyer_wannacry.exe 4072 2024-09-19_a264ca73aaced0a81a0b7fa14bc201f4_chaos_destroyer_wannacry.exe 4072 2024-09-19_a264ca73aaced0a81a0b7fa14bc201f4_chaos_destroyer_wannacry.exe 4072 2024-09-19_a264ca73aaced0a81a0b7fa14bc201f4_chaos_destroyer_wannacry.exe 4072 2024-09-19_a264ca73aaced0a81a0b7fa14bc201f4_chaos_destroyer_wannacry.exe 4072 2024-09-19_a264ca73aaced0a81a0b7fa14bc201f4_chaos_destroyer_wannacry.exe 4072 2024-09-19_a264ca73aaced0a81a0b7fa14bc201f4_chaos_destroyer_wannacry.exe 4072 2024-09-19_a264ca73aaced0a81a0b7fa14bc201f4_chaos_destroyer_wannacry.exe 4072 2024-09-19_a264ca73aaced0a81a0b7fa14bc201f4_chaos_destroyer_wannacry.exe 4072 2024-09-19_a264ca73aaced0a81a0b7fa14bc201f4_chaos_destroyer_wannacry.exe 4072 2024-09-19_a264ca73aaced0a81a0b7fa14bc201f4_chaos_destroyer_wannacry.exe 4072 2024-09-19_a264ca73aaced0a81a0b7fa14bc201f4_chaos_destroyer_wannacry.exe 4072 2024-09-19_a264ca73aaced0a81a0b7fa14bc201f4_chaos_destroyer_wannacry.exe 4072 2024-09-19_a264ca73aaced0a81a0b7fa14bc201f4_chaos_destroyer_wannacry.exe 4072 2024-09-19_a264ca73aaced0a81a0b7fa14bc201f4_chaos_destroyer_wannacry.exe 4072 2024-09-19_a264ca73aaced0a81a0b7fa14bc201f4_chaos_destroyer_wannacry.exe 4072 2024-09-19_a264ca73aaced0a81a0b7fa14bc201f4_chaos_destroyer_wannacry.exe 4072 2024-09-19_a264ca73aaced0a81a0b7fa14bc201f4_chaos_destroyer_wannacry.exe 4072 2024-09-19_a264ca73aaced0a81a0b7fa14bc201f4_chaos_destroyer_wannacry.exe 4072 2024-09-19_a264ca73aaced0a81a0b7fa14bc201f4_chaos_destroyer_wannacry.exe 4072 2024-09-19_a264ca73aaced0a81a0b7fa14bc201f4_chaos_destroyer_wannacry.exe 4072 2024-09-19_a264ca73aaced0a81a0b7fa14bc201f4_chaos_destroyer_wannacry.exe 4072 2024-09-19_a264ca73aaced0a81a0b7fa14bc201f4_chaos_destroyer_wannacry.exe 4072 2024-09-19_a264ca73aaced0a81a0b7fa14bc201f4_chaos_destroyer_wannacry.exe 880 svchost.exe 880 svchost.exe 880 svchost.exe 880 svchost.exe 880 svchost.exe 880 svchost.exe 880 svchost.exe 880 svchost.exe 880 svchost.exe 880 svchost.exe 880 svchost.exe 880 svchost.exe 880 svchost.exe 880 svchost.exe 880 svchost.exe 880 svchost.exe 880 svchost.exe 880 svchost.exe 880 svchost.exe 880 svchost.exe 880 svchost.exe 880 svchost.exe 880 svchost.exe 880 svchost.exe -
Suspicious use of AdjustPrivilegeToken 50 IoCs
description pid Process Token: SeDebugPrivilege 4072 2024-09-19_a264ca73aaced0a81a0b7fa14bc201f4_chaos_destroyer_wannacry.exe Token: SeDebugPrivilege 880 svchost.exe Token: SeBackupPrivilege 1348 vssvc.exe Token: SeRestorePrivilege 1348 vssvc.exe Token: SeAuditPrivilege 1348 vssvc.exe Token: SeIncreaseQuotaPrivilege 2348 WMIC.exe Token: SeSecurityPrivilege 2348 WMIC.exe Token: SeTakeOwnershipPrivilege 2348 WMIC.exe Token: SeLoadDriverPrivilege 2348 WMIC.exe Token: SeSystemProfilePrivilege 2348 WMIC.exe Token: SeSystemtimePrivilege 2348 WMIC.exe Token: SeProfSingleProcessPrivilege 2348 WMIC.exe Token: SeIncBasePriorityPrivilege 2348 WMIC.exe Token: SeCreatePagefilePrivilege 2348 WMIC.exe Token: SeBackupPrivilege 2348 WMIC.exe Token: SeRestorePrivilege 2348 WMIC.exe Token: SeShutdownPrivilege 2348 WMIC.exe Token: SeDebugPrivilege 2348 WMIC.exe Token: SeSystemEnvironmentPrivilege 2348 WMIC.exe Token: SeRemoteShutdownPrivilege 2348 WMIC.exe Token: SeUndockPrivilege 2348 WMIC.exe Token: SeManageVolumePrivilege 2348 WMIC.exe Token: 33 2348 WMIC.exe Token: 34 2348 WMIC.exe Token: 35 2348 WMIC.exe Token: 36 2348 WMIC.exe Token: SeIncreaseQuotaPrivilege 2348 WMIC.exe Token: SeSecurityPrivilege 2348 WMIC.exe Token: SeTakeOwnershipPrivilege 2348 WMIC.exe Token: SeLoadDriverPrivilege 2348 WMIC.exe Token: SeSystemProfilePrivilege 2348 WMIC.exe Token: SeSystemtimePrivilege 2348 WMIC.exe Token: SeProfSingleProcessPrivilege 2348 WMIC.exe Token: SeIncBasePriorityPrivilege 2348 WMIC.exe Token: SeCreatePagefilePrivilege 2348 WMIC.exe Token: SeBackupPrivilege 2348 WMIC.exe Token: SeRestorePrivilege 2348 WMIC.exe Token: SeShutdownPrivilege 2348 WMIC.exe Token: SeDebugPrivilege 2348 WMIC.exe Token: SeSystemEnvironmentPrivilege 2348 WMIC.exe Token: SeRemoteShutdownPrivilege 2348 WMIC.exe Token: SeUndockPrivilege 2348 WMIC.exe Token: SeManageVolumePrivilege 2348 WMIC.exe Token: 33 2348 WMIC.exe Token: 34 2348 WMIC.exe Token: 35 2348 WMIC.exe Token: 36 2348 WMIC.exe Token: SeBackupPrivilege 2152 wbengine.exe Token: SeRestorePrivilege 2152 wbengine.exe Token: SeSecurityPrivilege 2152 wbengine.exe -
Suspicious use of WriteProcessMemory 20 IoCs
description pid Process procid_target PID 4072 wrote to memory of 880 4072 2024-09-19_a264ca73aaced0a81a0b7fa14bc201f4_chaos_destroyer_wannacry.exe 82 PID 4072 wrote to memory of 880 4072 2024-09-19_a264ca73aaced0a81a0b7fa14bc201f4_chaos_destroyer_wannacry.exe 82 PID 880 wrote to memory of 4596 880 svchost.exe 89 PID 880 wrote to memory of 4596 880 svchost.exe 89 PID 4596 wrote to memory of 1636 4596 cmd.exe 91 PID 4596 wrote to memory of 1636 4596 cmd.exe 91 PID 4596 wrote to memory of 2348 4596 cmd.exe 94 PID 4596 wrote to memory of 2348 4596 cmd.exe 94 PID 880 wrote to memory of 2488 880 svchost.exe 95 PID 880 wrote to memory of 2488 880 svchost.exe 95 PID 2488 wrote to memory of 4896 2488 cmd.exe 97 PID 2488 wrote to memory of 4896 2488 cmd.exe 97 PID 2488 wrote to memory of 396 2488 cmd.exe 98 PID 2488 wrote to memory of 396 2488 cmd.exe 98 PID 880 wrote to memory of 2580 880 svchost.exe 99 PID 880 wrote to memory of 2580 880 svchost.exe 99 PID 2580 wrote to memory of 2040 2580 cmd.exe 101 PID 2580 wrote to memory of 2040 2580 cmd.exe 101 PID 880 wrote to memory of 1824 880 svchost.exe 105 PID 880 wrote to memory of 1824 880 svchost.exe 105 -
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\2024-09-19_a264ca73aaced0a81a0b7fa14bc201f4_chaos_destroyer_wannacry.exe"C:\Users\Admin\AppData\Local\Temp\2024-09-19_a264ca73aaced0a81a0b7fa14bc201f4_chaos_destroyer_wannacry.exe"1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4072 -
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:880 -
C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C vssadmin delete shadows /all /quiet & wmic shadowcopy delete3⤵
- Suspicious use of WriteProcessMemory
PID:4596 -
C:\Windows\system32\vssadmin.exevssadmin delete shadows /all /quiet4⤵
- Interacts with shadow copies
PID:1636
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C:\Windows\System32\Wbem\WMIC.exewmic shadowcopy delete4⤵
- Suspicious use of AdjustPrivilegeToken
PID:2348
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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:2488 -
C:\Windows\system32\bcdedit.exebcdedit /set {default} bootstatuspolicy ignoreallfailures4⤵
- Modifies boot configuration data using bcdedit
PID:4896
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C:\Windows\system32\bcdedit.exebcdedit /set {default} recoveryenabled no4⤵
- Modifies boot configuration data using bcdedit
PID:396
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C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet3⤵
- Suspicious use of WriteProcessMemory
PID:2580 -
C:\Windows\system32\wbadmin.exewbadmin delete catalog -quiet4⤵
- Deletes backup catalog
PID:2040
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C:\Windows\system32\NOTEPAD.EXE"C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\READ_THIS.txt3⤵
- Opens file in notepad (likely ransom note)
PID:1824
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1348
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C:\Windows\system32\wbengine.exe"C:\Windows\system32\wbengine.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2152
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C:\Windows\System32\vdsldr.exeC:\Windows\System32\vdsldr.exe -Embedding1⤵PID:4652
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C:\Windows\System32\vds.exeC:\Windows\System32\vds.exe1⤵
- Checks SCSI registry key(s)
PID:4736
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
23KB
MD5a264ca73aaced0a81a0b7fa14bc201f4
SHA177a1624cbc6d2d5066f7e23b42f05fd2703fb394
SHA2565404595684deb101a7d8d6a11c104dc1401151149f69cb9a60ebb223b6f7e5b2
SHA512d141ce0021b3352a79eb1401401f072e25fa06773ed567b9922d99967740e07a88e5d5b1daa77a61d9f8a53b51a36441c8e3c1a00a25de203ad05d82b1929ed4
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Filesize
985B
MD546839c94712706c9b4bea9c0b5f89693
SHA1af8af5265aa72bd8c30c63d7999f7f52c738b9ff
SHA2564afb727589a35a9ee9422855723f7e8a6b95a09e72d1683c57f92b3e3e0e9ca6
SHA512afd0bae86ab302883f83f1ab0534fb6a49d45a155e7320958387dc5a2721f854c6cd34f546931ea3b8da932b8f8bb13e0869d42b41684671cd606fb4023db382