Analysis
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max time kernel
94s -
max time network
204s -
platform
windows10-2004_x64 -
resource
win10v2004-20241007-en -
resource tags
arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system -
submitted
22-11-2024 19:31
Behavioral task
behavioral1
Sample
SkynetLocker.exe
Resource
win7-20240903-en
Behavioral task
behavioral2
Sample
SkynetLocker.exe
Resource
win10v2004-20241007-en
General
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Target
SkynetLocker.exe
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Size
329KB
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MD5
75a95bd340c43bf016117c1013631c42
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SHA1
90a88828b3ed3c25bd91e20b67012f54e221ade6
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SHA256
b9cd15b5f4112728466f2c11d595711d0953da0d26408b57f42d1215cf60b1b1
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SHA512
41b4356df8be11a8a395918a8871f466c3b7e67ab1eaae1c40cfc374085302ca8693c463e8c24c143c362edde4c43442ddc52ae4ec96a4b4ad294caea17fcb62
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SSDEEP
6144:7cVbL0hiIOb8+LDCvzCnQHw67feMv8KiPuTL94:7cVJIOA+vCvnJ8tPuF4
Malware Config
Extracted
C:\Users\Default\AppData\Local\Microsoft\Windows\WinX\Group1\SkynetData.txt
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/460-1-0x000001E780340000-0x000001E780398000-memory.dmp family_chaos behavioral2/files/0x0008000000023c78-7.dat family_chaos -
Chaos family
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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 4064 bcdedit.exe 4916 bcdedit.exe -
pid Process 4008 wbadmin.exe -
Disables Task Manager via registry modification
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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-1-5-21-2878641211-696417878-3864914810-1000\Control Panel\International\Geo\Nation SkynetLocker.exe Key value queried \REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\Control Panel\International\Geo\Nation svchost.exe -
Executes dropped EXE 1 IoCs
pid Process 4216 svchost.exe -
Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
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Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\UpdateTask = "C:\\Users\\Admin\\AppData\\Roaming\\svchost.exe" 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 1764 vssadmin.exe -
Modifies registry class 1 IoCs
description ioc Process Key created \REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000_Classes\Local Settings svchost.exe -
Opens file in notepad (likely ransom note) 1 IoCs
pid Process 1500 NOTEPAD.EXE -
Suspicious behavior: AddClipboardFormatListener 2 IoCs
pid Process 460 SkynetLocker.exe 4216 svchost.exe -
Suspicious behavior: EnumeratesProcesses 50 IoCs
pid Process 460 SkynetLocker.exe 460 SkynetLocker.exe 460 SkynetLocker.exe 460 SkynetLocker.exe 460 SkynetLocker.exe 460 SkynetLocker.exe 460 SkynetLocker.exe 460 SkynetLocker.exe 460 SkynetLocker.exe 460 SkynetLocker.exe 460 SkynetLocker.exe 460 SkynetLocker.exe 460 SkynetLocker.exe 460 SkynetLocker.exe 460 SkynetLocker.exe 460 SkynetLocker.exe 460 SkynetLocker.exe 460 SkynetLocker.exe 460 SkynetLocker.exe 460 SkynetLocker.exe 460 SkynetLocker.exe 460 SkynetLocker.exe 460 SkynetLocker.exe 460 SkynetLocker.exe 460 SkynetLocker.exe 4216 svchost.exe 4216 svchost.exe 4216 svchost.exe 4216 svchost.exe 4216 svchost.exe 4216 svchost.exe 4216 svchost.exe 4216 svchost.exe 4216 svchost.exe 4216 svchost.exe 4216 svchost.exe 4216 svchost.exe 4216 svchost.exe 4216 svchost.exe 4216 svchost.exe 4216 svchost.exe 4216 svchost.exe 4216 svchost.exe 4216 svchost.exe 4216 svchost.exe 4216 svchost.exe 4216 svchost.exe 4216 svchost.exe 4216 svchost.exe 4216 svchost.exe -
Suspicious use of AdjustPrivilegeToken 50 IoCs
description pid Process Token: SeDebugPrivilege 460 SkynetLocker.exe Token: SeDebugPrivilege 4216 svchost.exe Token: SeBackupPrivilege 4540 vssvc.exe Token: SeRestorePrivilege 4540 vssvc.exe Token: SeAuditPrivilege 4540 vssvc.exe Token: SeIncreaseQuotaPrivilege 1372 WMIC.exe Token: SeSecurityPrivilege 1372 WMIC.exe Token: SeTakeOwnershipPrivilege 1372 WMIC.exe Token: SeLoadDriverPrivilege 1372 WMIC.exe Token: SeSystemProfilePrivilege 1372 WMIC.exe Token: SeSystemtimePrivilege 1372 WMIC.exe Token: SeProfSingleProcessPrivilege 1372 WMIC.exe Token: SeIncBasePriorityPrivilege 1372 WMIC.exe Token: SeCreatePagefilePrivilege 1372 WMIC.exe Token: SeBackupPrivilege 1372 WMIC.exe Token: SeRestorePrivilege 1372 WMIC.exe Token: SeShutdownPrivilege 1372 WMIC.exe Token: SeDebugPrivilege 1372 WMIC.exe Token: SeSystemEnvironmentPrivilege 1372 WMIC.exe Token: SeRemoteShutdownPrivilege 1372 WMIC.exe Token: SeUndockPrivilege 1372 WMIC.exe Token: SeManageVolumePrivilege 1372 WMIC.exe Token: 33 1372 WMIC.exe Token: 34 1372 WMIC.exe Token: 35 1372 WMIC.exe Token: 36 1372 WMIC.exe Token: SeIncreaseQuotaPrivilege 1372 WMIC.exe Token: SeSecurityPrivilege 1372 WMIC.exe Token: SeTakeOwnershipPrivilege 1372 WMIC.exe Token: SeLoadDriverPrivilege 1372 WMIC.exe Token: SeSystemProfilePrivilege 1372 WMIC.exe Token: SeSystemtimePrivilege 1372 WMIC.exe Token: SeProfSingleProcessPrivilege 1372 WMIC.exe Token: SeIncBasePriorityPrivilege 1372 WMIC.exe Token: SeCreatePagefilePrivilege 1372 WMIC.exe Token: SeBackupPrivilege 1372 WMIC.exe Token: SeRestorePrivilege 1372 WMIC.exe Token: SeShutdownPrivilege 1372 WMIC.exe Token: SeDebugPrivilege 1372 WMIC.exe Token: SeSystemEnvironmentPrivilege 1372 WMIC.exe Token: SeRemoteShutdownPrivilege 1372 WMIC.exe Token: SeUndockPrivilege 1372 WMIC.exe Token: SeManageVolumePrivilege 1372 WMIC.exe Token: 33 1372 WMIC.exe Token: 34 1372 WMIC.exe Token: 35 1372 WMIC.exe Token: 36 1372 WMIC.exe Token: SeBackupPrivilege 1192 wbengine.exe Token: SeRestorePrivilege 1192 wbengine.exe Token: SeSecurityPrivilege 1192 wbengine.exe -
Suspicious use of WriteProcessMemory 20 IoCs
description pid Process procid_target PID 460 wrote to memory of 4216 460 SkynetLocker.exe 84 PID 460 wrote to memory of 4216 460 SkynetLocker.exe 84 PID 4216 wrote to memory of 1444 4216 svchost.exe 91 PID 4216 wrote to memory of 1444 4216 svchost.exe 91 PID 1444 wrote to memory of 1764 1444 cmd.exe 93 PID 1444 wrote to memory of 1764 1444 cmd.exe 93 PID 1444 wrote to memory of 1372 1444 cmd.exe 97 PID 1444 wrote to memory of 1372 1444 cmd.exe 97 PID 4216 wrote to memory of 4464 4216 svchost.exe 99 PID 4216 wrote to memory of 4464 4216 svchost.exe 99 PID 4464 wrote to memory of 4064 4464 cmd.exe 101 PID 4464 wrote to memory of 4064 4464 cmd.exe 101 PID 4464 wrote to memory of 4916 4464 cmd.exe 102 PID 4464 wrote to memory of 4916 4464 cmd.exe 102 PID 4216 wrote to memory of 3556 4216 svchost.exe 103 PID 4216 wrote to memory of 3556 4216 svchost.exe 103 PID 3556 wrote to memory of 4008 3556 cmd.exe 105 PID 3556 wrote to memory of 4008 3556 cmd.exe 105 PID 4216 wrote to memory of 1500 4216 svchost.exe 114 PID 4216 wrote to memory of 1500 4216 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\SkynetLocker.exe"C:\Users\Admin\AppData\Local\Temp\SkynetLocker.exe"1⤵
- Checks computer location settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:460 -
C:\Users\Admin\AppData\Roaming\svchost.exe"C:\Users\Admin\AppData\Roaming\svchost.exe"2⤵
- Checks computer location settings
- Executes dropped EXE
- Adds Run key to start application
- Modifies registry class
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4216 -
C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C vssadmin delete shadows /all /quiet & wmic shadowcopy delete3⤵
- Suspicious use of WriteProcessMemory
PID:1444 -
C:\Windows\system32\vssadmin.exevssadmin delete shadows /all /quiet4⤵
- Interacts with shadow copies
PID:1764
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C:\Windows\System32\Wbem\WMIC.exewmic shadowcopy delete4⤵
- Suspicious use of AdjustPrivilegeToken
PID:1372
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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:4464 -
C:\Windows\system32\bcdedit.exebcdedit /set {default} bootstatuspolicy ignoreallfailures4⤵
- Modifies boot configuration data using bcdedit
PID:4064
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C:\Windows\system32\bcdedit.exebcdedit /set {default} recoveryenabled no4⤵
- Modifies boot configuration data using bcdedit
PID:4916
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C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet3⤵
- Suspicious use of WriteProcessMemory
PID:3556 -
C:\Windows\system32\wbadmin.exewbadmin delete catalog -quiet4⤵
- Deletes backup catalog
PID:4008
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C:\Windows\system32\NOTEPAD.EXE"C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\SkynetData.txt3⤵
- Opens file in notepad (likely ransom note)
PID:1500
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:4540
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C:\Windows\system32\wbengine.exe"C:\Windows\system32\wbengine.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1192
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C:\Windows\System32\vdsldr.exeC:\Windows\System32\vdsldr.exe -Embedding1⤵PID:1136
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C:\Windows\System32\vds.exeC:\Windows\System32\vds.exe1⤵
- Checks SCSI registry key(s)
PID:3808
Network
MITRE ATT&CK Enterprise v15
Privilege Escalation
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Defense Evasion
Direct Volume Access
1Indicator Removal
3File Deletion
3Modify Registry
1Credential Access
Credentials from Password Stores
1Credentials from Web Browsers
1Unsecured Credentials
1Credentials In Files
1Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
329KB
MD575a95bd340c43bf016117c1013631c42
SHA190a88828b3ed3c25bd91e20b67012f54e221ade6
SHA256b9cd15b5f4112728466f2c11d595711d0953da0d26408b57f42d1215cf60b1b1
SHA51241b4356df8be11a8a395918a8871f466c3b7e67ab1eaae1c40cfc374085302ca8693c463e8c24c143c362edde4c43442ddc52ae4ec96a4b4ad294caea17fcb62
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Filesize
809B
MD5ca069420f1d43dabba1630a2477891c7
SHA1ec68214b8909fe0098b91a68aa01fb269c5a147a
SHA2566763e8a512a14afefd3bba63ef0516dbb378436e2bc7d853eaeb7a6fdf5eb090
SHA5122054aa509f5f839677d654529a76ef84e05c5b34a81037c65ce14fba527c01516643b4b97ada26869197f6c8d63270b24fe7392263bbd705f0ef95c9ca498336
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Filesize
1B
MD5d1457b72c3fb323a2671125aef3eab5d
SHA15bab61eb53176449e25c2c82f172b82cb13ffb9d
SHA2568a8de823d5ed3e12746a62ef169bcf372be0ca44f0a1236abc35df05d96928e1
SHA512ca63c07ad35d8c9fb0c92d6146759b122d4ec5d3f67ebe2f30ddb69f9e6c9fd3bf31a5e408b08f1d4d9cd68120cced9e57f010bef3cde97653fed5470da7d1a0