Analysis Overview
SHA256
5ed9d60854afed41799f5c6afe30d99e8b20bd14f22f189c5fea0f5f6d7c4835
Threat Level: Known bad
The file RustRCSController.exe was found to be: Known bad.
Malicious Activity Summary
Quasar family
Quasar RAT
Quasar payload
Executes dropped EXE
Unsigned PE
Suspicious use of WriteProcessMemory
Suspicious use of SetWindowsHookEx
Uses Task Scheduler COM API
Scheduled Task/Job: Scheduled Task
Suspicious use of AdjustPrivilegeToken
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-11-01 23:43
Signatures
Quasar family
Quasar payload
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-11-01 23:43
Reported
2024-11-01 23:44
Platform
win11-20241007-en
Max time kernel
29s
Max time network
32s
Command Line
Signatures
Quasar RAT
Quasar family
Quasar payload
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\SubDir\RustRCSController.exe | N/A |
Scheduled Task/Job: Scheduled Task
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SYSTEM32\schtasks.exe | N/A |
| N/A | N/A | C:\Windows\SYSTEM32\schtasks.exe | N/A |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\RustRCSController.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Roaming\SubDir\RustRCSController.exe | N/A |
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\SubDir\RustRCSController.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 496 wrote to memory of 2340 | N/A | C:\Users\Admin\AppData\Local\Temp\RustRCSController.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 496 wrote to memory of 2340 | N/A | C:\Users\Admin\AppData\Local\Temp\RustRCSController.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 496 wrote to memory of 4296 | N/A | C:\Users\Admin\AppData\Local\Temp\RustRCSController.exe | C:\Users\Admin\AppData\Roaming\SubDir\RustRCSController.exe |
| PID 496 wrote to memory of 4296 | N/A | C:\Users\Admin\AppData\Local\Temp\RustRCSController.exe | C:\Users\Admin\AppData\Roaming\SubDir\RustRCSController.exe |
| PID 4296 wrote to memory of 4672 | N/A | C:\Users\Admin\AppData\Roaming\SubDir\RustRCSController.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 4296 wrote to memory of 4672 | N/A | C:\Users\Admin\AppData\Roaming\SubDir\RustRCSController.exe | C:\Windows\SYSTEM32\schtasks.exe |
Uses Task Scheduler COM API
Processes
C:\Users\Admin\AppData\Local\Temp\RustRCSController.exe
"C:\Users\Admin\AppData\Local\Temp\RustRCSController.exe"
C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\RustRCSController.exe" /rl HIGHEST /f
C:\Users\Admin\AppData\Roaming\SubDir\RustRCSController.exe
"C:\Users\Admin\AppData\Roaming\SubDir\RustRCSController.exe"
C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\RustRCSController.exe" /rl HIGHEST /f
C:\Windows\System32\rundll32.exe
C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 68.32.126.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 98.209.201.84.in-addr.arpa | udp |
| N/A | 192.168.254.105:4782 | tcp | |
| N/A | 192.168.254.105:4782 | tcp | |
| N/A | 88.221.134.251:443 | tcp | |
| SE | 192.229.221.95:80 | tcp |
Files
memory/496-0-0x00007FF8EB363000-0x00007FF8EB365000-memory.dmp
memory/496-1-0x00000000001E0000-0x0000000000504000-memory.dmp
memory/496-2-0x00007FF8EB360000-0x00007FF8EBE22000-memory.dmp
C:\Users\Admin\AppData\Roaming\SubDir\RustRCSController.exe
| MD5 | be28df7fa7d56618aa9d68f128f1ad6e |
| SHA1 | f7057f68a15d4bb16a4879ae5e86add4de34d130 |
| SHA256 | 5ed9d60854afed41799f5c6afe30d99e8b20bd14f22f189c5fea0f5f6d7c4835 |
| SHA512 | 1367c799c758c62b65dc75fc85fcdf1838aa9b52a480dc60bd27fdad468ccd2890e60e4f7966a8f263e6173fe9e3493ec01387525b1acfc0730ce1cb84e156d6 |
C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\RustRCSController.exe.log
| MD5 | b4e91d2e5f40d5e2586a86cf3bb4df24 |
| SHA1 | 31920b3a41aa4400d4a0230a7622848789b38672 |
| SHA256 | 5d8af3c7519874ed42a0d74ee559ae30d9cc6930aef213079347e2b47092c210 |
| SHA512 | 968751b79a98961f145de48d425ea820fd1875bae79a725adf35fc8f4706c103ee0c7babd4838166d8a0dda9fbce3728c0265a04c4b37f335ec4eaa110a2b319 |
memory/4296-10-0x00007FF8EB360000-0x00007FF8EBE22000-memory.dmp
memory/496-11-0x00007FF8EB360000-0x00007FF8EBE22000-memory.dmp
memory/4296-12-0x00007FF8EB360000-0x00007FF8EBE22000-memory.dmp
memory/4296-13-0x000000001C0E0000-0x000000001C130000-memory.dmp
memory/4296-14-0x000000001C1F0000-0x000000001C2A2000-memory.dmp
memory/4296-15-0x00007FF8EB360000-0x00007FF8EBE22000-memory.dmp