Analysis
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max time kernel
147s -
max time network
16s -
platform
windows7_x64 -
resource
win7-20240903-en -
resource tags
arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-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:\Users\Admin\AppData\Local\Google\Chrome\User Data\Crashpad\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 5 IoCs
resource yara_rule behavioral1/memory/2180-2-0x00000000009F0000-0x0000000000D9E000-memory.dmp family_chaos behavioral1/memory/2692-11-0x00000000001F0000-0x000000000059E000-memory.dmp family_chaos behavioral1/memory/2180-9-0x0000000006B80000-0x0000000006F2E000-memory.dmp family_chaos behavioral1/memory/2692-13-0x00000000001F0000-0x000000000059E000-memory.dmp family_chaos behavioral1/memory/2180-412-0x00000000009F0000-0x0000000000D9E000-memory.dmp family_chaos -
Deletes shadow copies 3 TTPs
Ransomware often targets backup files to inhibit system recovery.
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Renames multiple (195) 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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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 2692 svchost.exe -
Loads dropped DLL 1 IoCs
pid Process 2180 operative.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-1-5-21-1846800975-3917212583-2893086201-1000\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\All Users\Microsoft\Windows\Start Menu\Programs\Games\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\Favorites\Links\desktop.ini svchost.exe File opened for modification C:\Users\Default\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\System Tools\Desktop.ini svchost.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Ringtones\desktop.ini svchost.exe File opened for modification C:\Users\Public\Recorded TV\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\Documents\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Pictures\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\Y8O71085\desktop.ini svchost.exe File opened for modification C:\Users\Public\Pictures\Sample Pictures\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\History\History.IE5\desktop.ini svchost.exe File opened for modification C:\Users\Public\Music\Sample Music\desktop.ini svchost.exe File opened for modification C:\Users\Default\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Accessibility\Desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\3W44XPEP\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\All Users\Microsoft\Windows\Start Menu\Programs\Startup\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\Public\Recorded TV\Sample Media\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Links\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\Accessories\Accessibility\Desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\6GFIGH6G\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\Accessories\Tablet PC\Desktop.ini svchost.exe File opened for modification C:\Users\Admin\Desktop\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\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\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\Programs\Administrative Tools\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Music\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 Mail\Stationery\Desktop.ini svchost.exe File opened for modification C:\Users\Public\Music\desktop.ini svchost.exe File opened for modification C:\Users\Public\Videos\Sample Videos\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\75GKCLJR\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\Windows\Start Menu\Programs\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Searches\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Videos\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\AppData\Local\Microsoft\Feeds Cache\GKATPXW1\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Favorites\Links for United States\desktop.ini svchost.exe File opened for modification F:\$RECYCLE.BIN\S-1-5-21-1846800975-3917212583-2893086201-1000\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\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\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\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\GY8QW6M2\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\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\Admin\AppData\Roaming\Microsoft\Windows\Libraries\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Accessibility\Desktop.ini svchost.exe File opened for modification C:\Users\Admin\Favorites\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\Admin\AppData\Local\Microsoft\Feeds Cache\desktop.ini svchost.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\Accessories\Windows PowerShell\desktop.ini svchost.exe File opened for modification C:\Users\Public\Videos\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\Feeds Cache\L7XNHY48\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\Public\Libraries\desktop.ini svchost.exe -
Sets desktop wallpaper using registry 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-1846800975-3917212583-2893086201-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\2gxhjge1k.jpg" svchost.exe -
Suspicious use of NtSetInformationThreadHideFromDebugger 17 IoCs
pid Process 2180 operative.exe 2692 svchost.exe 2692 svchost.exe 2692 svchost.exe 2692 svchost.exe 2692 svchost.exe 2692 svchost.exe 2692 svchost.exe 2692 svchost.exe 2692 svchost.exe 2692 svchost.exe 2692 svchost.exe 2692 svchost.exe 2692 svchost.exe 2692 svchost.exe 2692 svchost.exe 2692 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 8 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 vssadmin.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 Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language svchost.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language cmd.exe -
Interacts with shadow copies 3 TTPs 1 IoCs
Shadow copies are often targeted by ransomware to inhibit system recovery.
pid Process 2592 vssadmin.exe -
Suspicious behavior: AddClipboardFormatListener 1 IoCs
pid Process 2692 svchost.exe -
Suspicious behavior: EnumeratesProcesses 8 IoCs
pid Process 2180 operative.exe 2180 operative.exe 2180 operative.exe 2180 operative.exe 2692 svchost.exe 2692 svchost.exe 2692 svchost.exe 2692 svchost.exe -
Suspicious use of AdjustPrivilegeToken 45 IoCs
description pid Process Token: SeDebugPrivilege 2180 operative.exe Token: SeDebugPrivilege 2692 svchost.exe Token: SeBackupPrivilege 1708 vssvc.exe Token: SeRestorePrivilege 1708 vssvc.exe Token: SeAuditPrivilege 1708 vssvc.exe Token: SeIncreaseQuotaPrivilege 2080 WMIC.exe Token: SeSecurityPrivilege 2080 WMIC.exe Token: SeTakeOwnershipPrivilege 2080 WMIC.exe Token: SeLoadDriverPrivilege 2080 WMIC.exe Token: SeSystemProfilePrivilege 2080 WMIC.exe Token: SeSystemtimePrivilege 2080 WMIC.exe Token: SeProfSingleProcessPrivilege 2080 WMIC.exe Token: SeIncBasePriorityPrivilege 2080 WMIC.exe Token: SeCreatePagefilePrivilege 2080 WMIC.exe Token: SeBackupPrivilege 2080 WMIC.exe Token: SeRestorePrivilege 2080 WMIC.exe Token: SeShutdownPrivilege 2080 WMIC.exe Token: SeDebugPrivilege 2080 WMIC.exe Token: SeSystemEnvironmentPrivilege 2080 WMIC.exe Token: SeRemoteShutdownPrivilege 2080 WMIC.exe Token: SeUndockPrivilege 2080 WMIC.exe Token: SeManageVolumePrivilege 2080 WMIC.exe Token: 33 2080 WMIC.exe Token: 34 2080 WMIC.exe Token: 35 2080 WMIC.exe Token: SeIncreaseQuotaPrivilege 2080 WMIC.exe Token: SeSecurityPrivilege 2080 WMIC.exe Token: SeTakeOwnershipPrivilege 2080 WMIC.exe Token: SeLoadDriverPrivilege 2080 WMIC.exe Token: SeSystemProfilePrivilege 2080 WMIC.exe Token: SeSystemtimePrivilege 2080 WMIC.exe Token: SeProfSingleProcessPrivilege 2080 WMIC.exe Token: SeIncBasePriorityPrivilege 2080 WMIC.exe Token: SeCreatePagefilePrivilege 2080 WMIC.exe Token: SeBackupPrivilege 2080 WMIC.exe Token: SeRestorePrivilege 2080 WMIC.exe Token: SeShutdownPrivilege 2080 WMIC.exe Token: SeDebugPrivilege 2080 WMIC.exe Token: SeSystemEnvironmentPrivilege 2080 WMIC.exe Token: SeRemoteShutdownPrivilege 2080 WMIC.exe Token: SeUndockPrivilege 2080 WMIC.exe Token: SeManageVolumePrivilege 2080 WMIC.exe Token: 33 2080 WMIC.exe Token: 34 2080 WMIC.exe Token: 35 2080 WMIC.exe -
Suspicious use of SetWindowsHookEx 2 IoCs
pid Process 2180 operative.exe 2692 svchost.exe -
Suspicious use of WriteProcessMemory 28 IoCs
description pid Process procid_target PID 2180 wrote to memory of 2692 2180 operative.exe 30 PID 2180 wrote to memory of 2692 2180 operative.exe 30 PID 2180 wrote to memory of 2692 2180 operative.exe 30 PID 2180 wrote to memory of 2692 2180 operative.exe 30 PID 2692 wrote to memory of 2544 2692 svchost.exe 31 PID 2692 wrote to memory of 2544 2692 svchost.exe 31 PID 2692 wrote to memory of 2544 2692 svchost.exe 31 PID 2692 wrote to memory of 2544 2692 svchost.exe 31 PID 2544 wrote to memory of 2592 2544 cmd.exe 33 PID 2544 wrote to memory of 2592 2544 cmd.exe 33 PID 2544 wrote to memory of 2592 2544 cmd.exe 33 PID 2544 wrote to memory of 2592 2544 cmd.exe 33 PID 2544 wrote to memory of 2080 2544 cmd.exe 35 PID 2544 wrote to memory of 2080 2544 cmd.exe 35 PID 2544 wrote to memory of 2080 2544 cmd.exe 35 PID 2544 wrote to memory of 2080 2544 cmd.exe 35 PID 2692 wrote to memory of 2464 2692 svchost.exe 37 PID 2692 wrote to memory of 2464 2692 svchost.exe 37 PID 2692 wrote to memory of 2464 2692 svchost.exe 37 PID 2692 wrote to memory of 2464 2692 svchost.exe 37 PID 2692 wrote to memory of 2908 2692 svchost.exe 39 PID 2692 wrote to memory of 2908 2692 svchost.exe 39 PID 2692 wrote to memory of 2908 2692 svchost.exe 39 PID 2692 wrote to memory of 2908 2692 svchost.exe 39 PID 2692 wrote to memory of 2336 2692 svchost.exe 42 PID 2692 wrote to memory of 2336 2692 svchost.exe 42 PID 2692 wrote to memory of 2336 2692 svchost.exe 42 PID 2692 wrote to memory of 2336 2692 svchost.exe 42 -
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⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2180 -
C:\Users\Admin\AppData\Roaming\svchost.exe"C:\Users\Admin\AppData\Roaming\svchost.exe"2⤵
- 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
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2692 -
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:2544 -
C:\Windows\SysWOW64\vssadmin.exevssadmin delete shadows /all /quiet4⤵
- System Location Discovery: System Language Discovery
- Interacts with shadow copies
PID:2592
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C:\Windows\SysWOW64\Wbem\WMIC.exewmic shadowcopy delete4⤵
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:2080
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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:2464
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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:2908
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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:2336
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1708
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
2File Deletion
2Modify Registry
2Credential 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
1B
MD5d1457b72c3fb323a2671125aef3eab5d
SHA15bab61eb53176449e25c2c82f172b82cb13ffb9d
SHA2568a8de823d5ed3e12746a62ef169bcf372be0ca44f0a1236abc35df05d96928e1
SHA512ca63c07ad35d8c9fb0c92d6146759b122d4ec5d3f67ebe2f30ddb69f9e6c9fd3bf31a5e408b08f1d4d9cd68120cced9e57f010bef3cde97653fed5470da7d1a0
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Filesize
1.2MB
MD56a8bc83d53a47a0ec1cc68630f20aae2
SHA108fe5f2cf413274173ce6bd4b2c6b6057a81ed77
SHA2561aeea420fd7ad08f55a074277be26a36a98959a78da830c5ad6cee38c002cdf6
SHA512e3728db0ee56ee1b899ff49a10ed2aedca9e4df15e6ef8786ad8d5d5bfaf251a18e1d04bf0ca239395d69110375ac479a45e699db8f58d1391b9d7caf9ae49dd