Analysis Overview
SHA256
cb84c85fb50de9ac3bc4763c504ca87067680bc129d44c256570f7e1449ab9c5
Threat Level: Known bad
The file ransomware.exe was found to be: Known bad.
Malicious Activity Summary
Chaos Ransomware
Chaos family
Chaos
Drops startup file
Checks computer location settings
Executes dropped EXE
Drops desktop.ini file(s)
Adds Run key to start application
Enumerates physical storage devices
Unsigned PE
Opens file in notepad (likely ransom note)
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
Checks processor information in registry
Checks SCSI registry key(s)
Suspicious behavior: AddClipboardFormatListener
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
Suspicious behavior: GetForegroundWindowSpam
Modifies registry class
Suspicious use of SendNotifyMessage
MITRE ATT&CK Matrix V13
Analysis: static1
Detonation Overview
Reported
2024-06-28 04:41
Signatures
Chaos Ransomware
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Chaos family
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-06-28 04:41
Reported
2024-06-28 04:45
Platform
win10v2004-20240508-en
Max time kernel
209s
Max time network
53s
Command Line
Signatures
Chaos
Chaos Ransomware
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
Checks computer location settings
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\ransomware.exe | N/A |
| Key value queried | \REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Roaming\svchost.exe | N/A |
Drops startup file
| Description | Indicator | Process | Target |
| File created | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.url | C:\Users\Admin\AppData\Roaming\svchost.exe | N/A |
| File opened for modification | \??\c:\users\admin\appdata\roaming\microsoft\windows\start menu\programs\startup\svchost.url | C:\Windows\system32\taskmgr.exe | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\svchost.exe | N/A |
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Microsoft Store = "C:\\Users\\Admin\\AppData\\Roaming\\svchost.exe" | C:\Users\Admin\AppData\Roaming\svchost.exe | N/A |
Drops desktop.ini file(s)
| Description | Indicator | Process | Target |
| File created | C:\Users\Admin\Pictures\Saved Pictures\desktop.ini | C:\Users\Admin\AppData\Roaming\svchost.exe | N/A |
| File created | C:\Users\Admin\Music\desktop.ini | C:\Users\Admin\AppData\Roaming\svchost.exe | N/A |
| File created | C:\Users\Admin\Searches\desktop.ini | C:\Users\Admin\AppData\Roaming\svchost.exe | N/A |
| File created | F:\$RECYCLE.BIN\S-1-5-21-1337824034-2731376981-3755436523-1000\desktop.ini | C:\Users\Admin\AppData\Roaming\svchost.exe | N/A |
| File created | C:\Users\Admin\Desktop\desktop.ini | C:\Users\Admin\AppData\Roaming\svchost.exe | N/A |
| File created | C:\Users\Admin\Links\desktop.ini | C:\Users\Admin\AppData\Roaming\svchost.exe | N/A |
| File created | C:\Users\Admin\Contacts\desktop.ini | C:\Users\Admin\AppData\Roaming\svchost.exe | N/A |
| File created | C:\Users\Admin\Documents\desktop.ini | C:\Users\Admin\AppData\Roaming\svchost.exe | N/A |
| File created | C:\Users\Admin\Downloads\desktop.ini | C:\Users\Admin\AppData\Roaming\svchost.exe | N/A |
| File created | C:\Users\Admin\Pictures\Camera Roll\desktop.ini | C:\Users\Admin\AppData\Roaming\svchost.exe | N/A |
| File created | C:\Users\Admin\Favorites\Links\desktop.ini | C:\Users\Admin\AppData\Roaming\svchost.exe | N/A |
| File created | C:\Users\Admin\Videos\desktop.ini | C:\Users\Admin\AppData\Roaming\svchost.exe | N/A |
| File created | C:\Users\Admin\Pictures\desktop.ini | C:\Users\Admin\AppData\Roaming\svchost.exe | N/A |
| File created | C:\Users\Admin\OneDrive\desktop.ini | C:\Users\Admin\AppData\Roaming\svchost.exe | N/A |
| File created | C:\Users\Admin\Saved Games\desktop.ini | C:\Users\Admin\AppData\Roaming\svchost.exe | N/A |
| File created | C:\Users\Admin\Favorites\desktop.ini | C:\Users\Admin\AppData\Roaming\svchost.exe | N/A |
Enumerates physical storage devices
Checks SCSI registry key(s)
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_DADY&Prod_HARDDISK\4&215468a5&0&000000\FriendlyName | C:\Windows\system32\taskmgr.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_DADY&Prod_HARDDISK\4&215468a5&0&000000 | C:\Windows\system32\taskmgr.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_DADY&Prod_HARDDISK\4&215468a5&0&000000\Properties\{b725f130-47ef-101a-a5f1-02608c9eebac}\000A | C:\Windows\system32\taskmgr.exe | N/A |
Checks processor information in registry
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 | C:\Windows\system32\taskmgr.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString | C:\Windows\system32\taskmgr.exe | N/A |
Modifies registry class
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000_Classes\Local Settings | C:\Users\Admin\AppData\Roaming\svchost.exe | N/A |
Opens file in notepad (likely ransom note)
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system32\NOTEPAD.EXE | N/A |
Suspicious behavior: AddClipboardFormatListener
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\svchost.exe | N/A |
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system32\taskmgr.exe | N/A |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\ransomware.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Roaming\svchost.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\system32\taskmgr.exe | N/A |
| Token: SeSystemProfilePrivilege | N/A | C:\Windows\system32\taskmgr.exe | N/A |
| Token: SeCreateGlobalPrivilege | N/A | C:\Windows\system32\taskmgr.exe | N/A |
Suspicious use of FindShellTrayWindow
Suspicious use of SendNotifyMessage
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 3300 wrote to memory of 2328 | N/A | C:\Users\Admin\AppData\Local\Temp\ransomware.exe | C:\Users\Admin\AppData\Roaming\svchost.exe |
| PID 3300 wrote to memory of 2328 | N/A | C:\Users\Admin\AppData\Local\Temp\ransomware.exe | C:\Users\Admin\AppData\Roaming\svchost.exe |
| PID 2328 wrote to memory of 432 | N/A | C:\Users\Admin\AppData\Roaming\svchost.exe | C:\Windows\system32\NOTEPAD.EXE |
| PID 2328 wrote to memory of 432 | N/A | C:\Users\Admin\AppData\Roaming\svchost.exe | C:\Windows\system32\NOTEPAD.EXE |
Processes
C:\Users\Admin\AppData\Local\Temp\ransomware.exe
"C:\Users\Admin\AppData\Local\Temp\ransomware.exe"
C:\Users\Admin\AppData\Roaming\svchost.exe
"C:\Users\Admin\AppData\Roaming\svchost.exe"
C:\Windows\system32\NOTEPAD.EXE
"C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\read_it.txt
C:\Windows\system32\taskmgr.exe
"C:\Windows\system32\taskmgr.exe" /7
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 8.8.8.8.in-addr.arpa | udp |
Files
memory/3300-0-0x00007FFE899C3000-0x00007FFE899C5000-memory.dmp
memory/3300-1-0x0000000000690000-0x000000000069A000-memory.dmp
C:\Users\Admin\AppData\Roaming\svchost.exe
| MD5 | ac6b23f341c93a5deb6692d8fed6f6a4 |
| SHA1 | 6466c45b8c8dd60f03392614063d1c490231bf03 |
| SHA256 | cb84c85fb50de9ac3bc4763c504ca87067680bc129d44c256570f7e1449ab9c5 |
| SHA512 | d4483be2b241c12da57785d861018e88d75fbda736e51900872d105f11309474393c8381d654c4cf74242a7f138e070983ace9836806232afda9dee30e3dd29f |
memory/2328-14-0x00007FFE899C0000-0x00007FFE8A481000-memory.dmp
C:\Users\Admin\Pictures\read_it.txt
| MD5 | 18e13fb949ed44a7a60c867626989b17 |
| SHA1 | fa3766fa77f5353e34566f08980241da958a0526 |
| SHA256 | 6e042f64e2ca554ceff5983f1efad19d1d409c2be80be8c306f27afc57e97798 |
| SHA512 | 8cd750017c2d83c50fdfb7c52bde8c26b4d926e59d985dfe33c7be354142476a23993461144df987942af5d2e22f563f80b7bfcd8b30fa895fa4b7101fa0532c |
memory/2328-126-0x00007FFE899C0000-0x00007FFE8A481000-memory.dmp
memory/4104-127-0x000001E670730000-0x000001E670731000-memory.dmp
memory/4104-128-0x000001E670730000-0x000001E670731000-memory.dmp
memory/4104-129-0x000001E670730000-0x000001E670731000-memory.dmp
memory/4104-134-0x000001E670730000-0x000001E670731000-memory.dmp
memory/4104-139-0x000001E670730000-0x000001E670731000-memory.dmp
memory/4104-138-0x000001E670730000-0x000001E670731000-memory.dmp
memory/4104-137-0x000001E670730000-0x000001E670731000-memory.dmp
memory/4104-136-0x000001E670730000-0x000001E670731000-memory.dmp
memory/4104-135-0x000001E670730000-0x000001E670731000-memory.dmp
memory/4104-133-0x000001E670730000-0x000001E670731000-memory.dmp
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.url
| MD5 | 1a09a38485cbf1d59c29d8e3213e1ab9 |
| SHA1 | 9cbe6ebd07b13a0d4b2565dc15a273629aa97251 |
| SHA256 | 0a3bdc40dc0d243784bc5fa887b79110350b3d3200684f3ba99880fcea40e3b8 |
| SHA512 | a33c228196a4b3f14e40ac6ccb6c43002de28063594c472db852bedac20a6725f4e7601b9f32516e2c6bea35f83746973b3f1d200d9e5d668bda7553b62ac616 |