Analysis
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max time kernel
94s -
max time network
126s -
platform
windows10-2004_x64 -
resource
win10v2004-20240802-en -
resource tags
arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system -
submitted
03-10-2024 01:53
Behavioral task
behavioral1
Sample
8255e2d4929a77203721d93e3945e5cbf1fcaf3c2fe052b7cd18a5e0846e0dfe.exe
Resource
win7-20240903-en
Behavioral task
behavioral2
Sample
8255e2d4929a77203721d93e3945e5cbf1fcaf3c2fe052b7cd18a5e0846e0dfe.exe
Resource
win10v2004-20240802-en
General
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Target
8255e2d4929a77203721d93e3945e5cbf1fcaf3c2fe052b7cd18a5e0846e0dfe.exe
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Size
21KB
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MD5
14d1c2327c5bdde7656b7535f7936d92
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SHA1
20c05343aff8bc0661aa928c26bee1146ee7f454
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SHA256
8255e2d4929a77203721d93e3945e5cbf1fcaf3c2fe052b7cd18a5e0846e0dfe
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SHA512
195a525d09c977fa05acf5ac6eb7fc5690e83879555137c20838facf74bf7248ef15af2a2298e7bb02dc98e6bc61b37a6f11d8f7a0d4d7182447ac400d8618d9
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SSDEEP
384:U3Mg/bqo2b52NspBRdwdQJer91Cyu6eF:qqo2AspOdYer9x3eF
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/2560-1-0x00000000002D0000-0x00000000002DC000-memory.dmp family_chaos behavioral2/files/0x000800000002340e-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 404 bcdedit.exe 3564 bcdedit.exe -
Renames multiple (191) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
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pid Process 3244 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-1-5-21-2392887640-1187051047-2909758433-1000\Control Panel\International\Geo\Nation svchost.exe Key value queried \REGISTRY\USER\S-1-5-21-2392887640-1187051047-2909758433-1000\Control Panel\International\Geo\Nation 8255e2d4929a77203721d93e3945e5cbf1fcaf3c2fe052b7cd18a5e0846e0dfe.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_it.txt svchost.exe -
Executes dropped EXE 1 IoCs
pid Process 4896 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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Drops desktop.ini file(s) 34 IoCs
description ioc Process File opened for modification C:\Users\Admin\Documents\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\Videos\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\Admin\Links\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Contacts\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\Recent\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\Admin\Music\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\Saved Games\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\AccountPictures\desktop.ini svchost.exe File opened for modification C:\Users\Public\Pictures\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\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\desktop.ini svchost.exe File opened for modification C:\Users\Public\Desktop\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\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\Maintenance\Desktop.ini svchost.exe File opened for modification C:\Users\Admin\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\Favorites\desktop.ini svchost.exe File opened for modification C:\Users\Public\Music\desktop.ini svchost.exe File opened for modification C:\Users\Public\Videos\desktop.ini svchost.exe File opened for modification F:\$RECYCLE.BIN\S-1-5-21-2392887640-1187051047-2909758433-1000\desktop.ini svchost.exe File opened for modification C:\Users\Admin\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\Windows\Start Menu\Programs\Accessibility\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 value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\CdRom&Ven_QEMU&Prod_QEMU_DVD-ROM\4&215468a5&0&010000\FriendlyName vds.exe 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 -
Interacts with shadow copies 3 TTPs 1 IoCs
Shadow copies are often targeted by ransomware to inhibit system recovery.
pid Process 3896 vssadmin.exe -
Modifies registry class 1 IoCs
description ioc Process Key created \REGISTRY\USER\S-1-5-21-2392887640-1187051047-2909758433-1000_Classes\Local Settings svchost.exe -
Opens file in notepad (likely ransom note) 1 IoCs
pid Process 3976 NOTEPAD.EXE -
Suspicious behavior: AddClipboardFormatListener 1 IoCs
pid Process 4896 svchost.exe -
Suspicious behavior: EnumeratesProcesses 49 IoCs
pid Process 2560 8255e2d4929a77203721d93e3945e5cbf1fcaf3c2fe052b7cd18a5e0846e0dfe.exe 2560 8255e2d4929a77203721d93e3945e5cbf1fcaf3c2fe052b7cd18a5e0846e0dfe.exe 2560 8255e2d4929a77203721d93e3945e5cbf1fcaf3c2fe052b7cd18a5e0846e0dfe.exe 2560 8255e2d4929a77203721d93e3945e5cbf1fcaf3c2fe052b7cd18a5e0846e0dfe.exe 2560 8255e2d4929a77203721d93e3945e5cbf1fcaf3c2fe052b7cd18a5e0846e0dfe.exe 2560 8255e2d4929a77203721d93e3945e5cbf1fcaf3c2fe052b7cd18a5e0846e0dfe.exe 2560 8255e2d4929a77203721d93e3945e5cbf1fcaf3c2fe052b7cd18a5e0846e0dfe.exe 2560 8255e2d4929a77203721d93e3945e5cbf1fcaf3c2fe052b7cd18a5e0846e0dfe.exe 2560 8255e2d4929a77203721d93e3945e5cbf1fcaf3c2fe052b7cd18a5e0846e0dfe.exe 2560 8255e2d4929a77203721d93e3945e5cbf1fcaf3c2fe052b7cd18a5e0846e0dfe.exe 2560 8255e2d4929a77203721d93e3945e5cbf1fcaf3c2fe052b7cd18a5e0846e0dfe.exe 2560 8255e2d4929a77203721d93e3945e5cbf1fcaf3c2fe052b7cd18a5e0846e0dfe.exe 2560 8255e2d4929a77203721d93e3945e5cbf1fcaf3c2fe052b7cd18a5e0846e0dfe.exe 2560 8255e2d4929a77203721d93e3945e5cbf1fcaf3c2fe052b7cd18a5e0846e0dfe.exe 2560 8255e2d4929a77203721d93e3945e5cbf1fcaf3c2fe052b7cd18a5e0846e0dfe.exe 2560 8255e2d4929a77203721d93e3945e5cbf1fcaf3c2fe052b7cd18a5e0846e0dfe.exe 2560 8255e2d4929a77203721d93e3945e5cbf1fcaf3c2fe052b7cd18a5e0846e0dfe.exe 2560 8255e2d4929a77203721d93e3945e5cbf1fcaf3c2fe052b7cd18a5e0846e0dfe.exe 2560 8255e2d4929a77203721d93e3945e5cbf1fcaf3c2fe052b7cd18a5e0846e0dfe.exe 2560 8255e2d4929a77203721d93e3945e5cbf1fcaf3c2fe052b7cd18a5e0846e0dfe.exe 2560 8255e2d4929a77203721d93e3945e5cbf1fcaf3c2fe052b7cd18a5e0846e0dfe.exe 2560 8255e2d4929a77203721d93e3945e5cbf1fcaf3c2fe052b7cd18a5e0846e0dfe.exe 2560 8255e2d4929a77203721d93e3945e5cbf1fcaf3c2fe052b7cd18a5e0846e0dfe.exe 4896 svchost.exe 4896 svchost.exe 4896 svchost.exe 4896 svchost.exe 4896 svchost.exe 4896 svchost.exe 4896 svchost.exe 4896 svchost.exe 4896 svchost.exe 4896 svchost.exe 4896 svchost.exe 4896 svchost.exe 4896 svchost.exe 4896 svchost.exe 4896 svchost.exe 4896 svchost.exe 4896 svchost.exe 4896 svchost.exe 4896 svchost.exe 4896 svchost.exe 4896 svchost.exe 4896 svchost.exe 4896 svchost.exe 4896 svchost.exe 4896 svchost.exe 4896 svchost.exe -
Suspicious use of AdjustPrivilegeToken 50 IoCs
description pid Process Token: SeDebugPrivilege 2560 8255e2d4929a77203721d93e3945e5cbf1fcaf3c2fe052b7cd18a5e0846e0dfe.exe Token: SeDebugPrivilege 4896 svchost.exe Token: SeBackupPrivilege 3604 vssvc.exe Token: SeRestorePrivilege 3604 vssvc.exe Token: SeAuditPrivilege 3604 vssvc.exe Token: SeIncreaseQuotaPrivilege 3216 WMIC.exe Token: SeSecurityPrivilege 3216 WMIC.exe Token: SeTakeOwnershipPrivilege 3216 WMIC.exe Token: SeLoadDriverPrivilege 3216 WMIC.exe Token: SeSystemProfilePrivilege 3216 WMIC.exe Token: SeSystemtimePrivilege 3216 WMIC.exe Token: SeProfSingleProcessPrivilege 3216 WMIC.exe Token: SeIncBasePriorityPrivilege 3216 WMIC.exe Token: SeCreatePagefilePrivilege 3216 WMIC.exe Token: SeBackupPrivilege 3216 WMIC.exe Token: SeRestorePrivilege 3216 WMIC.exe Token: SeShutdownPrivilege 3216 WMIC.exe Token: SeDebugPrivilege 3216 WMIC.exe Token: SeSystemEnvironmentPrivilege 3216 WMIC.exe Token: SeRemoteShutdownPrivilege 3216 WMIC.exe Token: SeUndockPrivilege 3216 WMIC.exe Token: SeManageVolumePrivilege 3216 WMIC.exe Token: 33 3216 WMIC.exe Token: 34 3216 WMIC.exe Token: 35 3216 WMIC.exe Token: 36 3216 WMIC.exe Token: SeIncreaseQuotaPrivilege 3216 WMIC.exe Token: SeSecurityPrivilege 3216 WMIC.exe Token: SeTakeOwnershipPrivilege 3216 WMIC.exe Token: SeLoadDriverPrivilege 3216 WMIC.exe Token: SeSystemProfilePrivilege 3216 WMIC.exe Token: SeSystemtimePrivilege 3216 WMIC.exe Token: SeProfSingleProcessPrivilege 3216 WMIC.exe Token: SeIncBasePriorityPrivilege 3216 WMIC.exe Token: SeCreatePagefilePrivilege 3216 WMIC.exe Token: SeBackupPrivilege 3216 WMIC.exe Token: SeRestorePrivilege 3216 WMIC.exe Token: SeShutdownPrivilege 3216 WMIC.exe Token: SeDebugPrivilege 3216 WMIC.exe Token: SeSystemEnvironmentPrivilege 3216 WMIC.exe Token: SeRemoteShutdownPrivilege 3216 WMIC.exe Token: SeUndockPrivilege 3216 WMIC.exe Token: SeManageVolumePrivilege 3216 WMIC.exe Token: 33 3216 WMIC.exe Token: 34 3216 WMIC.exe Token: 35 3216 WMIC.exe Token: 36 3216 WMIC.exe Token: SeBackupPrivilege 4860 wbengine.exe Token: SeRestorePrivilege 4860 wbengine.exe Token: SeSecurityPrivilege 4860 wbengine.exe -
Suspicious use of WriteProcessMemory 20 IoCs
description pid Process procid_target PID 2560 wrote to memory of 4896 2560 8255e2d4929a77203721d93e3945e5cbf1fcaf3c2fe052b7cd18a5e0846e0dfe.exe 82 PID 2560 wrote to memory of 4896 2560 8255e2d4929a77203721d93e3945e5cbf1fcaf3c2fe052b7cd18a5e0846e0dfe.exe 82 PID 4896 wrote to memory of 2696 4896 svchost.exe 84 PID 4896 wrote to memory of 2696 4896 svchost.exe 84 PID 2696 wrote to memory of 3896 2696 cmd.exe 86 PID 2696 wrote to memory of 3896 2696 cmd.exe 86 PID 2696 wrote to memory of 3216 2696 cmd.exe 89 PID 2696 wrote to memory of 3216 2696 cmd.exe 89 PID 4896 wrote to memory of 2180 4896 svchost.exe 91 PID 4896 wrote to memory of 2180 4896 svchost.exe 91 PID 2180 wrote to memory of 404 2180 cmd.exe 93 PID 2180 wrote to memory of 404 2180 cmd.exe 93 PID 2180 wrote to memory of 3564 2180 cmd.exe 94 PID 2180 wrote to memory of 3564 2180 cmd.exe 94 PID 4896 wrote to memory of 1480 4896 svchost.exe 95 PID 4896 wrote to memory of 1480 4896 svchost.exe 95 PID 1480 wrote to memory of 3244 1480 cmd.exe 97 PID 1480 wrote to memory of 3244 1480 cmd.exe 97 PID 4896 wrote to memory of 3976 4896 svchost.exe 101 PID 4896 wrote to memory of 3976 4896 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\8255e2d4929a77203721d93e3945e5cbf1fcaf3c2fe052b7cd18a5e0846e0dfe.exe"C:\Users\Admin\AppData\Local\Temp\8255e2d4929a77203721d93e3945e5cbf1fcaf3c2fe052b7cd18a5e0846e0dfe.exe"1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2560 -
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:4896 -
C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C vssadmin delete shadows /all /quiet & wmic shadowcopy delete3⤵
- Suspicious use of WriteProcessMemory
PID:2696 -
C:\Windows\system32\vssadmin.exevssadmin delete shadows /all /quiet4⤵
- Interacts with shadow copies
PID:3896
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C:\Windows\System32\Wbem\WMIC.exewmic shadowcopy delete4⤵
- Suspicious use of AdjustPrivilegeToken
PID:3216
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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:2180 -
C:\Windows\system32\bcdedit.exebcdedit /set {default} bootstatuspolicy ignoreallfailures4⤵
- Modifies boot configuration data using bcdedit
PID:404
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C:\Windows\system32\bcdedit.exebcdedit /set {default} recoveryenabled no4⤵
- Modifies boot configuration data using bcdedit
PID:3564
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C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet3⤵
- Suspicious use of WriteProcessMemory
PID:1480 -
C:\Windows\system32\wbadmin.exewbadmin delete catalog -quiet4⤵
- Deletes backup catalog
PID:3244
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C:\Windows\system32\NOTEPAD.EXE"C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\read_it.txt3⤵
- Opens file in notepad (likely ransom note)
PID:3976
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:3604
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C:\Windows\system32\wbengine.exe"C:\Windows\system32\wbengine.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
PID:4860
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C:\Windows\System32\vdsldr.exeC:\Windows\System32\vdsldr.exe -Embedding1⤵PID:4660
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C:\Windows\System32\vds.exeC:\Windows\System32\vds.exe1⤵
- Checks SCSI registry key(s)
PID:2100
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
21KB
MD514d1c2327c5bdde7656b7535f7936d92
SHA120c05343aff8bc0661aa928c26bee1146ee7f454
SHA2568255e2d4929a77203721d93e3945e5cbf1fcaf3c2fe052b7cd18a5e0846e0dfe
SHA512195a525d09c977fa05acf5ac6eb7fc5690e83879555137c20838facf74bf7248ef15af2a2298e7bb02dc98e6bc61b37a6f11d8f7a0d4d7182447ac400d8618d9
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Filesize
15B
MD5f80d41ba30a3302ce7695fb00847b7b1
SHA1d49f02c98e7577e5c405437350c2b0e66ae11a54
SHA2561132f98b986f4ce354f5f68e7d67f1d780e4d1ff414ec08d2896b06b1fee7d36
SHA51253bd9dd8a457459d6936599260ddd0f88914b4e681324dad34cd8bc63e532d936e397e286bdf3f3f4b02dc7556cbacf559ecd5d739d29c9c1380321203fef8ae