Resubmissions
30-01-2025 03:04
250130-dkkesawjdk 1030-01-2025 01:27
250130-bvjj5atmbk 1030-01-2025 01:11
250130-bj2assvkbw 10Analysis
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max time kernel
149s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20241007-en -
resource tags
arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system -
submitted
30-01-2025 03:04
Behavioral task
behavioral1
Sample
chat.exe
Resource
win7-20241010-en
Behavioral task
behavioral2
Sample
chat.exe
Resource
win10v2004-20241007-en
General
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Target
chat.exe
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Size
27KB
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MD5
bb45c811961c699e90d80cc770fd828b
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SHA1
bab510ce8e9413bfcb907964e7f29c6f0af740ac
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SHA256
e5c6c05c353d24bb71d61de48ec945c4284df2ac6aabd751405b7f9349973bab
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SHA512
2f5c64b96ad289d38b498d949c2d7d89006d4c19a61efd53fdda48342817febdd1b1ffdf6f53d99296101d88a3d669bc9d3fef5017eb4254c759148eb410cd6b
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SSDEEP
384:+tWZPzzxAm1vS5ZooqGhvLKe2cIS2NirglyOy5o91XOkHpg82vO:j7zxAmOS/Gee2VSSifho9pOkHq822
Malware Config
Extracted
C:\Users\Default\read_it.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/4612-1-0x00000000009D0000-0x00000000009DE000-memory.dmp family_chaos behavioral2/files/0x000a000000023bb7-7.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 2596 bcdedit.exe 2676 bcdedit.exe -
pid Process 4952 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-1-5-21-4089630652-1596403869-279772308-1000\Control Panel\International\Geo\Nation chat.exe Key value queried \REGISTRY\USER\S-1-5-21-4089630652-1596403869-279772308-1000\Control Panel\International\Geo\Nation svchost.exe -
Drops startup file 2 IoCs
description ioc Process File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\read_it.txt svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\desktop.ini svchost.exe -
Executes dropped EXE 1 IoCs
pid Process 4736 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-1-5-21-4089630652-1596403869-279772308-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\UpdateTask = "C:\\Users\\Admin\\AppData\\Roaming\\svchost.exe" svchost.exe -
Drops desktop.ini file(s) 64 IoCs
description ioc Process File opened for modification C:\Users\Admin\Music\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\Pictures\Camera Roll\desktop.ini svchost.exe File opened for modification C:\Users\Default\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\desktop.ini svchost.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\Maintenance\Desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\WinX\Group3\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\Accessibility\desktop.ini svchost.exe File opened for modification C:\Users\Public\Music\desktop.ini svchost.exe File opened for modification C:\Users\Default\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\desktop.ini svchost.exe File opened for modification C:\Users\Public\desktop.ini svchost.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\Accessibility\desktop.ini svchost.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\Windows PowerShell\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\Default\AppData\Local\Microsoft\Windows\WinX\Group3\desktop.ini svchost.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\desktop.ini svchost.exe File opened for modification C:\Users\Default\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\System Tools\Desktop.ini svchost.exe File opened for modification C:\Users\Public\Downloads\desktop.ini svchost.exe File opened for modification C:\Users\Default\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessibility\desktop.ini svchost.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\Application Shortcuts\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\History\desktop.ini svchost.exe File opened for modification C:\Users\Public\Libraries\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Downloads\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\Start Menu\Programs\Accessories\desktop.ini svchost.exe File opened for modification C:\Users\Default\AppData\Roaming\Microsoft\Windows\SendTo\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Documents\desktop.ini svchost.exe File opened for modification C:\Users\Admin\OneDrive\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\Default\AppData\Local\Microsoft\Windows\WinX\Group2\desktop.ini svchost.exe File opened for modification C:\Users\Default\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Maintenance\Desktop.ini svchost.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\Accessories\desktop.ini svchost.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\System Tools\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\Searches\desktop.ini svchost.exe File opened for modification C:\Users\Admin\3D Objects\desktop.ini svchost.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\Administrative Tools\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\WinX\Group1\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Pictures\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\Public\Desktop\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\WinX\Group2\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Desktop\desktop.ini svchost.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\Accessories\System Tools\desktop.ini svchost.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\StartUp\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\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\Default\AppData\Local\Microsoft\Windows\WinX\Group1\desktop.ini svchost.exe File opened for modification C:\Users\Public\Videos\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Links\desktop.ini svchost.exe File opened for modification C:\Users\Default\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\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\Local\Microsoft\Windows\Burn\Burn\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Videos\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\Local\Microsoft\Windows\Burn\Burn1\desktop.ini svchost.exe File opened for modification C:\Users\Public\Documents\desktop.ini svchost.exe File opened for modification C:\Users\Public\Pictures\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Contacts\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\Burn\Burn2\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Favorites\Links\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 1976 vssadmin.exe -
Modifies registry class 1 IoCs
description ioc Process Key created \REGISTRY\USER\S-1-5-21-4089630652-1596403869-279772308-1000_Classes\Local Settings svchost.exe -
Opens file in notepad (likely ransom note) 1 IoCs
pid Process 2720 NOTEPAD.EXE -
Suspicious behavior: AddClipboardFormatListener 2 IoCs
pid Process 4612 chat.exe 4736 svchost.exe -
Suspicious behavior: EnumeratesProcesses 49 IoCs
pid Process 4612 chat.exe 4612 chat.exe 4612 chat.exe 4612 chat.exe 4612 chat.exe 4612 chat.exe 4612 chat.exe 4612 chat.exe 4612 chat.exe 4612 chat.exe 4612 chat.exe 4612 chat.exe 4612 chat.exe 4612 chat.exe 4612 chat.exe 4612 chat.exe 4612 chat.exe 4612 chat.exe 4612 chat.exe 4612 chat.exe 4612 chat.exe 4612 chat.exe 4612 chat.exe 4612 chat.exe 4736 svchost.exe 4736 svchost.exe 4736 svchost.exe 4736 svchost.exe 4736 svchost.exe 4736 svchost.exe 4736 svchost.exe 4736 svchost.exe 4736 svchost.exe 4736 svchost.exe 4736 svchost.exe 4736 svchost.exe 4736 svchost.exe 4736 svchost.exe 4736 svchost.exe 4736 svchost.exe 4736 svchost.exe 4736 svchost.exe 4736 svchost.exe 4736 svchost.exe 4736 svchost.exe 4736 svchost.exe 4736 svchost.exe 4736 svchost.exe 4736 svchost.exe -
Suspicious use of AdjustPrivilegeToken 50 IoCs
description pid Process Token: SeDebugPrivilege 4612 chat.exe Token: SeDebugPrivilege 4736 svchost.exe Token: SeBackupPrivilege 2976 vssvc.exe Token: SeRestorePrivilege 2976 vssvc.exe Token: SeAuditPrivilege 2976 vssvc.exe Token: SeIncreaseQuotaPrivilege 2556 WMIC.exe Token: SeSecurityPrivilege 2556 WMIC.exe Token: SeTakeOwnershipPrivilege 2556 WMIC.exe Token: SeLoadDriverPrivilege 2556 WMIC.exe Token: SeSystemProfilePrivilege 2556 WMIC.exe Token: SeSystemtimePrivilege 2556 WMIC.exe Token: SeProfSingleProcessPrivilege 2556 WMIC.exe Token: SeIncBasePriorityPrivilege 2556 WMIC.exe Token: SeCreatePagefilePrivilege 2556 WMIC.exe Token: SeBackupPrivilege 2556 WMIC.exe Token: SeRestorePrivilege 2556 WMIC.exe Token: SeShutdownPrivilege 2556 WMIC.exe Token: SeDebugPrivilege 2556 WMIC.exe Token: SeSystemEnvironmentPrivilege 2556 WMIC.exe Token: SeRemoteShutdownPrivilege 2556 WMIC.exe Token: SeUndockPrivilege 2556 WMIC.exe Token: SeManageVolumePrivilege 2556 WMIC.exe Token: 33 2556 WMIC.exe Token: 34 2556 WMIC.exe Token: 35 2556 WMIC.exe Token: 36 2556 WMIC.exe Token: SeIncreaseQuotaPrivilege 2556 WMIC.exe Token: SeSecurityPrivilege 2556 WMIC.exe Token: SeTakeOwnershipPrivilege 2556 WMIC.exe Token: SeLoadDriverPrivilege 2556 WMIC.exe Token: SeSystemProfilePrivilege 2556 WMIC.exe Token: SeSystemtimePrivilege 2556 WMIC.exe Token: SeProfSingleProcessPrivilege 2556 WMIC.exe Token: SeIncBasePriorityPrivilege 2556 WMIC.exe Token: SeCreatePagefilePrivilege 2556 WMIC.exe Token: SeBackupPrivilege 2556 WMIC.exe Token: SeRestorePrivilege 2556 WMIC.exe Token: SeShutdownPrivilege 2556 WMIC.exe Token: SeDebugPrivilege 2556 WMIC.exe Token: SeSystemEnvironmentPrivilege 2556 WMIC.exe Token: SeRemoteShutdownPrivilege 2556 WMIC.exe Token: SeUndockPrivilege 2556 WMIC.exe Token: SeManageVolumePrivilege 2556 WMIC.exe Token: 33 2556 WMIC.exe Token: 34 2556 WMIC.exe Token: 35 2556 WMIC.exe Token: 36 2556 WMIC.exe Token: SeBackupPrivilege 2172 wbengine.exe Token: SeRestorePrivilege 2172 wbengine.exe Token: SeSecurityPrivilege 2172 wbengine.exe -
Suspicious use of WriteProcessMemory 20 IoCs
description pid Process procid_target PID 4612 wrote to memory of 4736 4612 chat.exe 82 PID 4612 wrote to memory of 4736 4612 chat.exe 82 PID 4736 wrote to memory of 1296 4736 svchost.exe 83 PID 4736 wrote to memory of 1296 4736 svchost.exe 83 PID 1296 wrote to memory of 1976 1296 cmd.exe 85 PID 1296 wrote to memory of 1976 1296 cmd.exe 85 PID 1296 wrote to memory of 2556 1296 cmd.exe 88 PID 1296 wrote to memory of 2556 1296 cmd.exe 88 PID 4736 wrote to memory of 2856 4736 svchost.exe 90 PID 4736 wrote to memory of 2856 4736 svchost.exe 90 PID 2856 wrote to memory of 2596 2856 cmd.exe 92 PID 2856 wrote to memory of 2596 2856 cmd.exe 92 PID 2856 wrote to memory of 2676 2856 cmd.exe 93 PID 2856 wrote to memory of 2676 2856 cmd.exe 93 PID 4736 wrote to memory of 3292 4736 svchost.exe 94 PID 4736 wrote to memory of 3292 4736 svchost.exe 94 PID 3292 wrote to memory of 4952 3292 cmd.exe 96 PID 3292 wrote to memory of 4952 3292 cmd.exe 96 PID 4736 wrote to memory of 2720 4736 svchost.exe 102 PID 4736 wrote to memory of 2720 4736 svchost.exe 102 -
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\chat.exe"C:\Users\Admin\AppData\Local\Temp\chat.exe"1⤵
- Checks computer location settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4612 -
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
- Adds Run key to start application
- Drops desktop.ini file(s)
- Modifies registry class
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4736 -
C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C vssadmin delete shadows /all /quiet & wmic shadowcopy delete3⤵
- Suspicious use of WriteProcessMemory
PID:1296 -
C:\Windows\system32\vssadmin.exevssadmin delete shadows /all /quiet4⤵
- Interacts with shadow copies
PID:1976
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C:\Windows\System32\Wbem\WMIC.exewmic shadowcopy delete4⤵
- Suspicious use of AdjustPrivilegeToken
PID:2556
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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:2856 -
C:\Windows\system32\bcdedit.exebcdedit /set {default} bootstatuspolicy ignoreallfailures4⤵
- Modifies boot configuration data using bcdedit
PID:2596
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C:\Windows\system32\bcdedit.exebcdedit /set {default} recoveryenabled no4⤵
- Modifies boot configuration data using bcdedit
PID:2676
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C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet3⤵
- Suspicious use of WriteProcessMemory
PID:3292 -
C:\Windows\system32\wbadmin.exewbadmin delete catalog -quiet4⤵
- Deletes backup catalog
PID:4952
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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:2720
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2976
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C:\Windows\system32\wbengine.exe"C:\Windows\system32\wbengine.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2172
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C:\Windows\System32\vdsldr.exeC:\Windows\System32\vdsldr.exe -Embedding1⤵PID:2004
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C:\Windows\System32\vds.exeC:\Windows\System32\vds.exe1⤵
- Checks SCSI registry key(s)
PID:3948
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
1KB
MD5baf55b95da4a601229647f25dad12878
SHA1abc16954ebfd213733c4493fc1910164d825cac8
SHA256ee954c5d8156fd8890e582c716e5758ed9b33721258f10e758bdc31ccbcb1924
SHA51224f502fedb1a305d0d7b08857ffc1db9b2359ff34e06d5748ecc84e35c985f29a20d9f0a533bea32d234ab37097ec0481620c63b14ac89b280e75e14d19fd545
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Filesize
27KB
MD5bb45c811961c699e90d80cc770fd828b
SHA1bab510ce8e9413bfcb907964e7f29c6f0af740ac
SHA256e5c6c05c353d24bb71d61de48ec945c4284df2ac6aabd751405b7f9349973bab
SHA5122f5c64b96ad289d38b498d949c2d7d89006d4c19a61efd53fdda48342817febdd1b1ffdf6f53d99296101d88a3d669bc9d3fef5017eb4254c759148eb410cd6b
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Filesize
1B
MD5d1457b72c3fb323a2671125aef3eab5d
SHA15bab61eb53176449e25c2c82f172b82cb13ffb9d
SHA2568a8de823d5ed3e12746a62ef169bcf372be0ca44f0a1236abc35df05d96928e1
SHA512ca63c07ad35d8c9fb0c92d6146759b122d4ec5d3f67ebe2f30ddb69f9e6c9fd3bf31a5e408b08f1d4d9cd68120cced9e57f010bef3cde97653fed5470da7d1a0
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Filesize
582B
MD5ed5cc52876db869de48a4783069c2a5e
SHA1a9d51ceaeff715ace430f9462ab2ee4e7f33e70e
SHA25645726f2f29967ef016f8d556fb6468a577307d67388cc4530295a9ca10fdfa36
SHA5121745aefb9b4db4cdd7c08ee3a7d133db08f35a336fd18b598211519b481ef25ac84a3e8a3da3db06caef9f531288d1cf0ca8d4b2560637945e7953e8b45421f5