Analysis
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max time kernel
614s -
max time network
433s -
platform
windows11-21h2_x64 -
resource
win11-20240709-en -
resource tags
arch:x64arch:x86image:win11-20240709-enlocale:en-usos:windows11-21h2-x64system -
submitted
23-07-2024 13:55
Behavioral task
behavioral1
Sample
1ba5ab55b7212ba92a9402677e30e45f12d98a98f78cdcf5864a67d6c264d053.exe
Resource
win11-20240709-en
General
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Target
1ba5ab55b7212ba92a9402677e30e45f12d98a98f78cdcf5864a67d6c264d053.exe
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Size
610KB
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MD5
deb8f4311fd52319f6168c10b626c808
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SHA1
f4807d71a1048d05815a09b74997f338e26ba9ff
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SHA256
1ba5ab55b7212ba92a9402677e30e45f12d98a98f78cdcf5864a67d6c264d053
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SHA512
ecb2c2630b03a07f20e993722ef9f55f5369d11afa21bec3dab59f65867849fb3596e4d3707730d2d75acd5d62e98afb1c06f2e7a80cd4f5946b51867bed9685
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SSDEEP
6144:vOr9ptAkuoip7RLPIZ3s3FjC4nj5ImCEb:AAkuoK7RLPIoAZEb
Malware Config
Extracted
C:\Users\Admin\Documents\README.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 behavioral1/memory/4504-0-0x0000000000480000-0x000000000051E000-memory.dmp family_chaos behavioral1/files/0x000300000002aafe-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 4672 bcdedit.exe 3720 bcdedit.exe -
Renames multiple (211) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
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pid Process 1980 wbadmin.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\README.txt svchost.exe -
Executes dropped EXE 1 IoCs
pid Process 4688 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\Start Menu\Programs\Accessories\Desktop.ini svchost.exe File opened for modification C:\Users\Public\Documents\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\AccountPictures\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\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Maintenance\Desktop.ini svchost.exe File opened for modification F:\$RECYCLE.BIN\S-1-5-21-1376880307-1734125928-2892936080-1000\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Pictures\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\Internet Explorer\Quick Launch\User Pinned\TaskBar\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\Contacts\desktop.ini svchost.exe File opened for modification C:\Users\Public\Videos\desktop.ini svchost.exe File opened for modification C:\Users\Public\Pictures\desktop.ini svchost.exe File opened for modification C:\Users\Public\Music\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\Videos\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\Administrative Tools\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\Music\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\System Tools\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Desktop\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\Pictures\Camera Roll\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\Links\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Documents\desktop.ini svchost.exe -
Sets desktop wallpaper using registry 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-1376880307-1734125928-2892936080-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\ezm1lr987.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_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 4904 vssadmin.exe -
Modifies registry class 1 IoCs
description ioc Process Key created \REGISTRY\USER\S-1-5-21-1376880307-1734125928-2892936080-1000_Classes\Local Settings svchost.exe -
Opens file in notepad (likely ransom note) 1 IoCs
pid Process 4712 NOTEPAD.EXE -
Suspicious behavior: AddClipboardFormatListener 1 IoCs
pid Process 4688 svchost.exe -
Suspicious behavior: EnumeratesProcesses 41 IoCs
pid Process 4504 1ba5ab55b7212ba92a9402677e30e45f12d98a98f78cdcf5864a67d6c264d053.exe 4504 1ba5ab55b7212ba92a9402677e30e45f12d98a98f78cdcf5864a67d6c264d053.exe 4504 1ba5ab55b7212ba92a9402677e30e45f12d98a98f78cdcf5864a67d6c264d053.exe 4504 1ba5ab55b7212ba92a9402677e30e45f12d98a98f78cdcf5864a67d6c264d053.exe 4504 1ba5ab55b7212ba92a9402677e30e45f12d98a98f78cdcf5864a67d6c264d053.exe 4504 1ba5ab55b7212ba92a9402677e30e45f12d98a98f78cdcf5864a67d6c264d053.exe 4504 1ba5ab55b7212ba92a9402677e30e45f12d98a98f78cdcf5864a67d6c264d053.exe 4504 1ba5ab55b7212ba92a9402677e30e45f12d98a98f78cdcf5864a67d6c264d053.exe 4504 1ba5ab55b7212ba92a9402677e30e45f12d98a98f78cdcf5864a67d6c264d053.exe 4504 1ba5ab55b7212ba92a9402677e30e45f12d98a98f78cdcf5864a67d6c264d053.exe 4504 1ba5ab55b7212ba92a9402677e30e45f12d98a98f78cdcf5864a67d6c264d053.exe 4504 1ba5ab55b7212ba92a9402677e30e45f12d98a98f78cdcf5864a67d6c264d053.exe 4504 1ba5ab55b7212ba92a9402677e30e45f12d98a98f78cdcf5864a67d6c264d053.exe 4504 1ba5ab55b7212ba92a9402677e30e45f12d98a98f78cdcf5864a67d6c264d053.exe 4504 1ba5ab55b7212ba92a9402677e30e45f12d98a98f78cdcf5864a67d6c264d053.exe 4504 1ba5ab55b7212ba92a9402677e30e45f12d98a98f78cdcf5864a67d6c264d053.exe 4504 1ba5ab55b7212ba92a9402677e30e45f12d98a98f78cdcf5864a67d6c264d053.exe 4504 1ba5ab55b7212ba92a9402677e30e45f12d98a98f78cdcf5864a67d6c264d053.exe 4504 1ba5ab55b7212ba92a9402677e30e45f12d98a98f78cdcf5864a67d6c264d053.exe 4688 svchost.exe 4688 svchost.exe 4688 svchost.exe 4688 svchost.exe 4688 svchost.exe 4688 svchost.exe 4688 svchost.exe 4688 svchost.exe 4688 svchost.exe 4688 svchost.exe 4688 svchost.exe 4688 svchost.exe 4688 svchost.exe 4688 svchost.exe 4688 svchost.exe 4688 svchost.exe 4688 svchost.exe 4688 svchost.exe 4688 svchost.exe 4688 svchost.exe 4688 svchost.exe 4688 svchost.exe -
Suspicious use of AdjustPrivilegeToken 50 IoCs
description pid Process Token: SeDebugPrivilege 4504 1ba5ab55b7212ba92a9402677e30e45f12d98a98f78cdcf5864a67d6c264d053.exe Token: SeDebugPrivilege 4688 svchost.exe Token: SeBackupPrivilege 4536 vssvc.exe Token: SeRestorePrivilege 4536 vssvc.exe Token: SeAuditPrivilege 4536 vssvc.exe Token: SeIncreaseQuotaPrivilege 4048 WMIC.exe Token: SeSecurityPrivilege 4048 WMIC.exe Token: SeTakeOwnershipPrivilege 4048 WMIC.exe Token: SeLoadDriverPrivilege 4048 WMIC.exe Token: SeSystemProfilePrivilege 4048 WMIC.exe Token: SeSystemtimePrivilege 4048 WMIC.exe Token: SeProfSingleProcessPrivilege 4048 WMIC.exe Token: SeIncBasePriorityPrivilege 4048 WMIC.exe Token: SeCreatePagefilePrivilege 4048 WMIC.exe Token: SeBackupPrivilege 4048 WMIC.exe Token: SeRestorePrivilege 4048 WMIC.exe Token: SeShutdownPrivilege 4048 WMIC.exe Token: SeDebugPrivilege 4048 WMIC.exe Token: SeSystemEnvironmentPrivilege 4048 WMIC.exe Token: SeRemoteShutdownPrivilege 4048 WMIC.exe Token: SeUndockPrivilege 4048 WMIC.exe Token: SeManageVolumePrivilege 4048 WMIC.exe Token: 33 4048 WMIC.exe Token: 34 4048 WMIC.exe Token: 35 4048 WMIC.exe Token: 36 4048 WMIC.exe Token: SeIncreaseQuotaPrivilege 4048 WMIC.exe Token: SeSecurityPrivilege 4048 WMIC.exe Token: SeTakeOwnershipPrivilege 4048 WMIC.exe Token: SeLoadDriverPrivilege 4048 WMIC.exe Token: SeSystemProfilePrivilege 4048 WMIC.exe Token: SeSystemtimePrivilege 4048 WMIC.exe Token: SeProfSingleProcessPrivilege 4048 WMIC.exe Token: SeIncBasePriorityPrivilege 4048 WMIC.exe Token: SeCreatePagefilePrivilege 4048 WMIC.exe Token: SeBackupPrivilege 4048 WMIC.exe Token: SeRestorePrivilege 4048 WMIC.exe Token: SeShutdownPrivilege 4048 WMIC.exe Token: SeDebugPrivilege 4048 WMIC.exe Token: SeSystemEnvironmentPrivilege 4048 WMIC.exe Token: SeRemoteShutdownPrivilege 4048 WMIC.exe Token: SeUndockPrivilege 4048 WMIC.exe Token: SeManageVolumePrivilege 4048 WMIC.exe Token: 33 4048 WMIC.exe Token: 34 4048 WMIC.exe Token: 35 4048 WMIC.exe Token: 36 4048 WMIC.exe Token: SeBackupPrivilege 788 wbengine.exe Token: SeRestorePrivilege 788 wbengine.exe Token: SeSecurityPrivilege 788 wbengine.exe -
Suspicious use of WriteProcessMemory 20 IoCs
description pid Process procid_target PID 4504 wrote to memory of 4688 4504 1ba5ab55b7212ba92a9402677e30e45f12d98a98f78cdcf5864a67d6c264d053.exe 82 PID 4504 wrote to memory of 4688 4504 1ba5ab55b7212ba92a9402677e30e45f12d98a98f78cdcf5864a67d6c264d053.exe 82 PID 4688 wrote to memory of 1436 4688 svchost.exe 84 PID 4688 wrote to memory of 1436 4688 svchost.exe 84 PID 1436 wrote to memory of 4904 1436 cmd.exe 86 PID 1436 wrote to memory of 4904 1436 cmd.exe 86 PID 1436 wrote to memory of 4048 1436 cmd.exe 89 PID 1436 wrote to memory of 4048 1436 cmd.exe 89 PID 4688 wrote to memory of 2464 4688 svchost.exe 91 PID 4688 wrote to memory of 2464 4688 svchost.exe 91 PID 2464 wrote to memory of 4672 2464 cmd.exe 93 PID 2464 wrote to memory of 4672 2464 cmd.exe 93 PID 2464 wrote to memory of 3720 2464 cmd.exe 94 PID 2464 wrote to memory of 3720 2464 cmd.exe 94 PID 4688 wrote to memory of 1616 4688 svchost.exe 95 PID 4688 wrote to memory of 1616 4688 svchost.exe 95 PID 1616 wrote to memory of 1980 1616 cmd.exe 97 PID 1616 wrote to memory of 1980 1616 cmd.exe 97 PID 4688 wrote to memory of 4712 4688 svchost.exe 101 PID 4688 wrote to memory of 4712 4688 svchost.exe 101 -
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\1ba5ab55b7212ba92a9402677e30e45f12d98a98f78cdcf5864a67d6c264d053.exe"C:\Users\Admin\AppData\Local\Temp\1ba5ab55b7212ba92a9402677e30e45f12d98a98f78cdcf5864a67d6c264d053.exe"1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4504 -
C:\Users\Admin\AppData\Roaming\svchost.exe"C:\Users\Admin\AppData\Roaming\svchost.exe"2⤵
- 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:4688 -
C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C vssadmin delete shadows /all /quiet & wmic shadowcopy delete3⤵
- Suspicious use of WriteProcessMemory
PID:1436 -
C:\Windows\system32\vssadmin.exevssadmin delete shadows /all /quiet4⤵
- Interacts with shadow copies
PID:4904
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C:\Windows\System32\Wbem\WMIC.exewmic shadowcopy delete4⤵
- Suspicious use of AdjustPrivilegeToken
PID:4048
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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:2464 -
C:\Windows\system32\bcdedit.exebcdedit /set {default} bootstatuspolicy ignoreallfailures4⤵
- Modifies boot configuration data using bcdedit
PID:4672
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C:\Windows\system32\bcdedit.exebcdedit /set {default} recoveryenabled no4⤵
- Modifies boot configuration data using bcdedit
PID:3720
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C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet3⤵
- Suspicious use of WriteProcessMemory
PID:1616 -
C:\Windows\system32\wbadmin.exewbadmin delete catalog -quiet4⤵
- Deletes backup catalog
PID:1980
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C:\Windows\system32\NOTEPAD.EXE"C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\README.txt3⤵
- Opens file in notepad (likely ransom note)
PID:4712
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:4536
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C:\Windows\system32\wbengine.exe"C:\Windows\system32\wbengine.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
PID:788
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C:\Windows\System32\vdsldr.exeC:\Windows\System32\vdsldr.exe -Embedding1⤵PID:3832
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C:\Windows\System32\vds.exeC:\Windows\System32\vds.exe1⤵
- Checks SCSI registry key(s)
PID:4792
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
610KB
MD5deb8f4311fd52319f6168c10b626c808
SHA1f4807d71a1048d05815a09b74997f338e26ba9ff
SHA2561ba5ab55b7212ba92a9402677e30e45f12d98a98f78cdcf5864a67d6c264d053
SHA512ecb2c2630b03a07f20e993722ef9f55f5369d11afa21bec3dab59f65867849fb3596e4d3707730d2d75acd5d62e98afb1c06f2e7a80cd4f5946b51867bed9685
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Filesize
2KB
MD5335d5c912d55923bd52152e68513e1f9
SHA1462d753225ec89e1d08749b2060f86a81cb252a5
SHA256bc4deb41c898692c1b857f029f341b3c3e743bc7a611a9d494d7d2bf89dfea4a
SHA512fc7836bb80285d2ac50e7fee88033474b47041cf46d3310c9b312c806b2f7f59e49c1d220a55330188142ae5ed156e25213cd3e37957df172672b78acdd16a10