Analysis
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max time kernel
143s -
max time network
122s -
platform
windows10-2004_x64 -
resource
win10v2004-20240802-en -
resource tags
arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system -
submitted
23-09-2024 23:26
Static task
static1
Behavioral task
behavioral1
Sample
operative.exe
Resource
win7-20240903-en
Behavioral task
behavioral2
Sample
operative.exe
Resource
win10v2004-20240802-en
General
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Target
operative.exe
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Size
1.2MB
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MD5
6a8bc83d53a47a0ec1cc68630f20aae2
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SHA1
08fe5f2cf413274173ce6bd4b2c6b6057a81ed77
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SHA256
1aeea420fd7ad08f55a074277be26a36a98959a78da830c5ad6cee38c002cdf6
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SHA512
e3728db0ee56ee1b899ff49a10ed2aedca9e4df15e6ef8786ad8d5d5bfaf251a18e1d04bf0ca239395d69110375ac479a45e699db8f58d1391b9d7caf9ae49dd
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SSDEEP
24576:qGIqWDuqh8ObW465lbXZAeJWBi++fprWhX5jWvKb6YdgCKttD7+4:gRKqKObWpH8i++4hzmYuttfl
Malware Config
Extracted
C:\ProgramData\Adobe\Setup\{AC76BA86-7AD7-1033-7B44-AC0F074E4100}\DECRYPTION INSTRUCTIONS.txt
https://www.coinmama.com
https://www.bitpanda.com
Signatures
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Chaos
Ransomware family first seen in June 2021.
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Chaos Ransomware 4 IoCs
resource yara_rule behavioral2/memory/4884-2-0x0000000000D90000-0x000000000113E000-memory.dmp family_chaos behavioral2/memory/3660-21-0x0000000000E90000-0x000000000123E000-memory.dmp family_chaos behavioral2/memory/4884-20-0x0000000000D90000-0x000000000113E000-memory.dmp family_chaos behavioral2/memory/3660-24-0x0000000000E90000-0x000000000123E000-memory.dmp family_chaos -
Deletes shadow copies 3 TTPs
Ransomware often targets backup files to inhibit system recovery.
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Renames multiple (197) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
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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-1-5-21-2412658365-3084825385-3340777666-1000\Control Panel\International\Geo\Nation operative.exe Key value queried \REGISTRY\USER\S-1-5-21-2412658365-3084825385-3340777666-1000\Control Panel\International\Geo\Nation svchost.exe -
Drops startup file 2 IoCs
description ioc Process 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\DECRYPTION INSTRUCTIONS.txt svchost.exe -
Executes dropped EXE 1 IoCs
pid Process 3660 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-1-5-21-2412658365-3084825385-3340777666-1000\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\Public\AccountPictures\desktop.ini svchost.exe File opened for modification C:\Users\Public\Documents\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\All Users\Microsoft\Windows\Start Menu\Programs\Windows PowerShell\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Saved Games\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\Public\Videos\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\AppData\Local\Microsoft\Windows\WinX\Group3\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\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\StartUp\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\Administrative Tools\desktop.ini svchost.exe File opened for modification C:\Users\Public\Desktop\desktop.ini svchost.exe File opened for modification C:\Users\Public\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\Default\AppData\Local\Microsoft\Windows\WinX\Group1\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\Music\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\Start Menu\Programs\System Tools\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\AppData\Local\Microsoft\Windows\History\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\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\Videos\desktop.ini svchost.exe File opened for modification F:\$RECYCLE.BIN\S-1-5-21-2412658365-3084825385-3340777666-1000\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\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\Maintenance\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\Pictures\Camera Roll\desktop.ini svchost.exe File opened for modification C:\Users\Admin\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\OneDrive\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\Roaming\Microsoft\Internet Explorer\Quick Launch\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Links\desktop.ini svchost.exe File opened for modification C:\Users\Admin\3D Objects\desktop.ini svchost.exe File opened for modification C:\Users\Public\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\Default\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessibility\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\SendTo\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\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\Pictures\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\Default\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\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\Admin\Documents\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\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Maintenance\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\Default\AppData\Local\Microsoft\Windows\WinX\Group2\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\Default\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\desktop.ini svchost.exe File opened for modification C:\Users\Public\Libraries\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\AccountPictures\desktop.ini svchost.exe -
Sets desktop wallpaper using registry 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-2412658365-3084825385-3340777666-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\ngzxw4v9d.jpg" svchost.exe -
Suspicious use of NtSetInformationThreadHideFromDebugger 17 IoCs
pid Process 4884 operative.exe 3660 svchost.exe 3660 svchost.exe 3660 svchost.exe 3660 svchost.exe 3660 svchost.exe 3660 svchost.exe 3660 svchost.exe 3660 svchost.exe 3660 svchost.exe 3660 svchost.exe 3660 svchost.exe 3660 svchost.exe 3660 svchost.exe 3660 svchost.exe 3660 svchost.exe 3660 svchost.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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System Location Discovery: System Language Discovery 1 TTPs 7 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
description ioc Process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language svchost.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language cmd.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language WMIC.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language cmd.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language cmd.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language NOTEPAD.EXE Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language operative.exe -
Modifies registry class 1 IoCs
description ioc Process Key created \REGISTRY\USER\S-1-5-21-2412658365-3084825385-3340777666-1000_Classes\Local Settings svchost.exe -
Suspicious behavior: AddClipboardFormatListener 2 IoCs
pid Process 4884 operative.exe 3660 svchost.exe -
Suspicious behavior: EnumeratesProcesses 50 IoCs
pid Process 4884 operative.exe 4884 operative.exe 4884 operative.exe 4884 operative.exe 4884 operative.exe 4884 operative.exe 4884 operative.exe 4884 operative.exe 4884 operative.exe 4884 operative.exe 4884 operative.exe 4884 operative.exe 4884 operative.exe 4884 operative.exe 4884 operative.exe 4884 operative.exe 4884 operative.exe 4884 operative.exe 4884 operative.exe 4884 operative.exe 4884 operative.exe 4884 operative.exe 4884 operative.exe 4884 operative.exe 4884 operative.exe 3660 svchost.exe 3660 svchost.exe 3660 svchost.exe 3660 svchost.exe 3660 svchost.exe 3660 svchost.exe 3660 svchost.exe 3660 svchost.exe 3660 svchost.exe 3660 svchost.exe 3660 svchost.exe 3660 svchost.exe 3660 svchost.exe 3660 svchost.exe 3660 svchost.exe 3660 svchost.exe 3660 svchost.exe 3660 svchost.exe 3660 svchost.exe 3660 svchost.exe 3660 svchost.exe 3660 svchost.exe 3660 svchost.exe 3660 svchost.exe 3660 svchost.exe -
Suspicious use of AdjustPrivilegeToken 47 IoCs
description pid Process Token: SeDebugPrivilege 4884 operative.exe Token: SeDebugPrivilege 3660 svchost.exe Token: SeIncreaseQuotaPrivilege 2028 WMIC.exe Token: SeSecurityPrivilege 2028 WMIC.exe Token: SeTakeOwnershipPrivilege 2028 WMIC.exe Token: SeLoadDriverPrivilege 2028 WMIC.exe Token: SeSystemProfilePrivilege 2028 WMIC.exe Token: SeSystemtimePrivilege 2028 WMIC.exe Token: SeProfSingleProcessPrivilege 2028 WMIC.exe Token: SeIncBasePriorityPrivilege 2028 WMIC.exe Token: SeCreatePagefilePrivilege 2028 WMIC.exe Token: SeBackupPrivilege 2028 WMIC.exe Token: SeRestorePrivilege 2028 WMIC.exe Token: SeShutdownPrivilege 2028 WMIC.exe Token: SeDebugPrivilege 2028 WMIC.exe Token: SeSystemEnvironmentPrivilege 2028 WMIC.exe Token: SeRemoteShutdownPrivilege 2028 WMIC.exe Token: SeUndockPrivilege 2028 WMIC.exe Token: SeManageVolumePrivilege 2028 WMIC.exe Token: 33 2028 WMIC.exe Token: 34 2028 WMIC.exe Token: 35 2028 WMIC.exe Token: 36 2028 WMIC.exe Token: SeIncreaseQuotaPrivilege 2028 WMIC.exe Token: SeSecurityPrivilege 2028 WMIC.exe Token: SeTakeOwnershipPrivilege 2028 WMIC.exe Token: SeLoadDriverPrivilege 2028 WMIC.exe Token: SeSystemProfilePrivilege 2028 WMIC.exe Token: SeSystemtimePrivilege 2028 WMIC.exe Token: SeProfSingleProcessPrivilege 2028 WMIC.exe Token: SeIncBasePriorityPrivilege 2028 WMIC.exe Token: SeCreatePagefilePrivilege 2028 WMIC.exe Token: SeBackupPrivilege 2028 WMIC.exe Token: SeRestorePrivilege 2028 WMIC.exe Token: SeShutdownPrivilege 2028 WMIC.exe Token: SeDebugPrivilege 2028 WMIC.exe Token: SeSystemEnvironmentPrivilege 2028 WMIC.exe Token: SeRemoteShutdownPrivilege 2028 WMIC.exe Token: SeUndockPrivilege 2028 WMIC.exe Token: SeManageVolumePrivilege 2028 WMIC.exe Token: 33 2028 WMIC.exe Token: 34 2028 WMIC.exe Token: 35 2028 WMIC.exe Token: 36 2028 WMIC.exe Token: SeBackupPrivilege 5084 vssvc.exe Token: SeRestorePrivilege 5084 vssvc.exe Token: SeAuditPrivilege 5084 vssvc.exe -
Suspicious use of SetWindowsHookEx 2 IoCs
pid Process 4884 operative.exe 3660 svchost.exe -
Suspicious use of WriteProcessMemory 18 IoCs
description pid Process procid_target PID 4884 wrote to memory of 3660 4884 operative.exe 82 PID 4884 wrote to memory of 3660 4884 operative.exe 82 PID 4884 wrote to memory of 3660 4884 operative.exe 82 PID 3660 wrote to memory of 1492 3660 svchost.exe 83 PID 3660 wrote to memory of 1492 3660 svchost.exe 83 PID 3660 wrote to memory of 1492 3660 svchost.exe 83 PID 1492 wrote to memory of 2028 1492 cmd.exe 85 PID 1492 wrote to memory of 2028 1492 cmd.exe 85 PID 1492 wrote to memory of 2028 1492 cmd.exe 85 PID 3660 wrote to memory of 2068 3660 svchost.exe 88 PID 3660 wrote to memory of 2068 3660 svchost.exe 88 PID 3660 wrote to memory of 2068 3660 svchost.exe 88 PID 3660 wrote to memory of 4244 3660 svchost.exe 90 PID 3660 wrote to memory of 4244 3660 svchost.exe 90 PID 3660 wrote to memory of 4244 3660 svchost.exe 90 PID 3660 wrote to memory of 1424 3660 svchost.exe 94 PID 3660 wrote to memory of 1424 3660 svchost.exe 94 PID 3660 wrote to memory of 1424 3660 svchost.exe 94 -
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\operative.exe"C:\Users\Admin\AppData\Local\Temp\operative.exe"1⤵
- Checks computer location settings
- Suspicious use of NtSetInformationThreadHideFromDebugger
- System Location Discovery: System Language Discovery
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4884 -
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)
- Sets desktop wallpaper using registry
- Suspicious use of NtSetInformationThreadHideFromDebugger
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3660 -
C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /C vssadmin delete shadows /all /quiet & wmic shadowcopy delete3⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1492 -
C:\Windows\SysWOW64\Wbem\WMIC.exewmic shadowcopy delete4⤵
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:2028
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /C bcdedit /set {default} bootstatuspolicy ignoreallfailures & bcdedit /set {default} recoveryenabled no3⤵
- System Location Discovery: System Language Discovery
PID:2068
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet3⤵
- System Location Discovery: System Language Discovery
PID:4244
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C:\Windows\SysWOW64\NOTEPAD.EXE"C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\DECRYPTION INSTRUCTIONS.txt3⤵
- System Location Discovery: System Language Discovery
PID:1424
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:5084
Network
MITRE ATT&CK Enterprise v15
Privilege Escalation
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
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
875B
MD5b26ac7697713ef8f168526cafe259680
SHA1b680c364c048462755d72f3f6cb27715ebbe8bed
SHA256ded023d3b2a7ffae963eb62af54d189076e0d1744a8d34a39a6758f93db70483
SHA51213e43c334be47d3c825064529227a6c685c7f964c5866ed7161a587305b4ae0d891d0f1a9a418cb25f9c31adb1e6d1a7f5e08d358fcdb156de657a73a42306c1
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Filesize
1KB
MD5df27a876383bd81dfbcb457a9fa9f09d
SHA11bbc4ab95c89d02ec1d217f0255205787999164e
SHA2568940500d6f057583903fde1af0287e27197410415639fc69beb39475fa5240dc
SHA512fe68271375002cfcf8585c92b948ae47cd1632919c43db4bc738e2bc85ceea6dd30880dba27df9c3317531f1017624d4bd8979e6c5fad58112c7aa1189f0b844
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Filesize
1.2MB
MD56a8bc83d53a47a0ec1cc68630f20aae2
SHA108fe5f2cf413274173ce6bd4b2c6b6057a81ed77
SHA2561aeea420fd7ad08f55a074277be26a36a98959a78da830c5ad6cee38c002cdf6
SHA512e3728db0ee56ee1b899ff49a10ed2aedca9e4df15e6ef8786ad8d5d5bfaf251a18e1d04bf0ca239395d69110375ac479a45e699db8f58d1391b9d7caf9ae49dd
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Filesize
1B
MD5d1457b72c3fb323a2671125aef3eab5d
SHA15bab61eb53176449e25c2c82f172b82cb13ffb9d
SHA2568a8de823d5ed3e12746a62ef169bcf372be0ca44f0a1236abc35df05d96928e1
SHA512ca63c07ad35d8c9fb0c92d6146759b122d4ec5d3f67ebe2f30ddb69f9e6c9fd3bf31a5e408b08f1d4d9cd68120cced9e57f010bef3cde97653fed5470da7d1a0