Analysis Overview
SHA256
eddbc56dadb4921c99e30d4637b61238b6b2188b5db86f47bc720cbbb5b15bc7
Threat Level: Known bad
The file Client-built.exe was found to be: Known bad.
Malicious Activity Summary
Quasar family
Quasar RAT
Quasar payload
Executes dropped EXE
Legitimate hosting services abused for malware hosting/C2
Enumerates physical storage devices
Unsigned PE
Creates scheduled task(s)
Uses Task Scheduler COM API
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
Suspicious use of SendNotifyMessage
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-04-07 17:44
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
2024-04-07 17:44
Reported
2024-04-07 17:49
Platform
win7-20231129-en
Max time kernel
149s
Max time network
147s
Command Line
Signatures
Quasar RAT
Quasar payload
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
| 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\Client.exe | N/A |
Legitimate hosting services abused for malware hosting/C2
| Description | Indicator | Process | Target |
| N/A | 2.tcp.eu.ngrok.io | N/A | N/A |
| N/A | 2.tcp.eu.ngrok.io | N/A | N/A |
| N/A | 2.tcp.eu.ngrok.io | N/A | N/A |
| N/A | 2.tcp.eu.ngrok.io | N/A | N/A |
| N/A | 2.tcp.eu.ngrok.io | N/A | N/A |
Enumerates physical storage devices
Creates scheduled task(s)
| 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\Client-built.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe | N/A |
Suspicious use of FindShellTrayWindow
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe | N/A |
Suspicious use of SendNotifyMessage
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe | N/A |
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe | N/A |
Suspicious use of WriteProcessMemory
Uses Task Scheduler COM API
Processes
C:\Users\Admin\AppData\Local\Temp\Client-built.exe
"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
C:\Windows\system32\schtasks.exe
"schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
"C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
C:\Windows\system32\schtasks.exe
"schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 2.tcp.eu.ngrok.io | udp |
| DE | 3.127.138.57:16096 | 2.tcp.eu.ngrok.io | tcp |
| DE | 3.127.138.57:16096 | 2.tcp.eu.ngrok.io | tcp |
| DE | 3.127.138.57:16096 | 2.tcp.eu.ngrok.io | tcp |
| DE | 3.127.138.57:16096 | 2.tcp.eu.ngrok.io | tcp |
| DE | 3.127.138.57:16096 | 2.tcp.eu.ngrok.io | tcp |
| DE | 3.127.138.57:16096 | 2.tcp.eu.ngrok.io | tcp |
| DE | 3.127.138.57:16096 | 2.tcp.eu.ngrok.io | tcp |
| DE | 3.127.138.57:16096 | 2.tcp.eu.ngrok.io | tcp |
| DE | 3.127.138.57:16096 | 2.tcp.eu.ngrok.io | tcp |
| DE | 3.127.138.57:16096 | 2.tcp.eu.ngrok.io | tcp |
| DE | 3.127.138.57:16096 | 2.tcp.eu.ngrok.io | tcp |
| DE | 3.127.138.57:16096 | 2.tcp.eu.ngrok.io | tcp |
| DE | 3.127.138.57:16096 | 2.tcp.eu.ngrok.io | tcp |
| DE | 3.127.138.57:16096 | 2.tcp.eu.ngrok.io | tcp |
| DE | 3.127.138.57:16096 | 2.tcp.eu.ngrok.io | tcp |
| DE | 3.127.138.57:16096 | 2.tcp.eu.ngrok.io | tcp |
| US | 8.8.8.8:53 | 2.tcp.eu.ngrok.io | udp |
| DE | 3.127.138.57:16096 | 2.tcp.eu.ngrok.io | tcp |
| US | 8.8.8.8:53 | 2.tcp.eu.ngrok.io | udp |
| DE | 18.197.239.5:16096 | 2.tcp.eu.ngrok.io | tcp |
| DE | 18.197.239.5:16096 | 2.tcp.eu.ngrok.io | tcp |
| DE | 18.197.239.5:16096 | 2.tcp.eu.ngrok.io | tcp |
| DE | 18.197.239.5:16096 | 2.tcp.eu.ngrok.io | tcp |
| DE | 18.197.239.5:16096 | 2.tcp.eu.ngrok.io | tcp |
| DE | 18.197.239.5:16096 | 2.tcp.eu.ngrok.io | tcp |
| DE | 18.197.239.5:16096 | 2.tcp.eu.ngrok.io | tcp |
| DE | 18.197.239.5:16096 | 2.tcp.eu.ngrok.io | tcp |
| DE | 18.197.239.5:16096 | 2.tcp.eu.ngrok.io | tcp |
| DE | 18.197.239.5:16096 | 2.tcp.eu.ngrok.io | tcp |
| DE | 18.197.239.5:16096 | 2.tcp.eu.ngrok.io | tcp |
| DE | 18.197.239.5:16096 | 2.tcp.eu.ngrok.io | tcp |
| DE | 18.197.239.5:16096 | 2.tcp.eu.ngrok.io | tcp |
| DE | 18.197.239.5:16096 | 2.tcp.eu.ngrok.io | tcp |
| DE | 18.197.239.5:16096 | 2.tcp.eu.ngrok.io | tcp |
| DE | 18.197.239.5:16096 | 2.tcp.eu.ngrok.io | tcp |
| DE | 18.197.239.5:16096 | 2.tcp.eu.ngrok.io | tcp |
| US | 8.8.8.8:53 | 2.tcp.eu.ngrok.io | udp |
| DE | 18.197.239.5:16096 | 2.tcp.eu.ngrok.io | tcp |
| DE | 18.197.239.5:16096 | 2.tcp.eu.ngrok.io | tcp |
| DE | 18.197.239.5:16096 | 2.tcp.eu.ngrok.io | tcp |
| DE | 18.197.239.5:16096 | 2.tcp.eu.ngrok.io | tcp |
| US | 8.8.8.8:53 | 2.tcp.eu.ngrok.io | udp |
| DE | 18.156.13.209:16096 | 2.tcp.eu.ngrok.io | tcp |
| DE | 18.156.13.209:16096 | 2.tcp.eu.ngrok.io | tcp |
| DE | 18.156.13.209:16096 | tcp |
Files
memory/1724-0-0x0000000000AF0000-0x0000000000E14000-memory.dmp
memory/1724-1-0x000007FEF5410000-0x000007FEF5DFC000-memory.dmp
memory/1724-2-0x000000001B260000-0x000000001B2E0000-memory.dmp
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
| MD5 | 293e5793dea329af168463e35950c84a |
| SHA1 | 790fb958938ab09415b8c61deb0d164a24dad596 |
| SHA256 | eddbc56dadb4921c99e30d4637b61238b6b2188b5db86f47bc720cbbb5b15bc7 |
| SHA512 | 0b5cd07cb0f8aa1a74a864c737d4447c0bd370cbbfe07d3014c2ec7a355bae5df84674238d105396a30dc37c0c0606870d0dc4f69f1068c849ceb72cae0c39a7 |
memory/1056-8-0x000007FEF5410000-0x000007FEF5DFC000-memory.dmp
memory/1056-7-0x00000000011A0000-0x00000000014C4000-memory.dmp
memory/1724-9-0x000007FEF5410000-0x000007FEF5DFC000-memory.dmp
memory/1056-10-0x00000000010E0000-0x0000000001160000-memory.dmp
memory/1056-11-0x000007FEF5410000-0x000007FEF5DFC000-memory.dmp
memory/1056-12-0x00000000010E0000-0x0000000001160000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-04-07 17:44
Reported
2024-04-07 17:49
Platform
win10v2004-20240226-en
Max time kernel
92s
Max time network
142s
Command Line
Signatures
Quasar RAT
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\Client.exe | N/A |
Legitimate hosting services abused for malware hosting/C2
| Description | Indicator | Process | Target |
| N/A | 2.tcp.eu.ngrok.io | N/A | N/A |
Enumerates physical storage devices
Creates scheduled task(s)
| 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\Client-built.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe | N/A |
Suspicious use of FindShellTrayWindow
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe | N/A |
Suspicious use of SendNotifyMessage
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe | N/A |
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 3388 wrote to memory of 2176 | N/A | C:\Users\Admin\AppData\Local\Temp\Client-built.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 3388 wrote to memory of 2176 | N/A | C:\Users\Admin\AppData\Local\Temp\Client-built.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 3388 wrote to memory of 1916 | N/A | C:\Users\Admin\AppData\Local\Temp\Client-built.exe | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe |
| PID 3388 wrote to memory of 1916 | N/A | C:\Users\Admin\AppData\Local\Temp\Client-built.exe | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe |
| PID 1916 wrote to memory of 3924 | N/A | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 1916 wrote to memory of 3924 | N/A | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe | C:\Windows\SYSTEM32\schtasks.exe |
Uses Task Scheduler COM API
Processes
C:\Users\Admin\AppData\Local\Temp\Client-built.exe
"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
"C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 228.249.119.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 240.197.17.2.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 2.159.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 2.tcp.eu.ngrok.io | udp |
| DE | 3.126.37.18:16096 | 2.tcp.eu.ngrok.io | tcp |
| US | 8.8.8.8:53 | ipwho.is | udp |
| DE | 195.201.57.90:443 | ipwho.is | tcp |
| US | 8.8.8.8:53 | 18.37.126.3.in-addr.arpa | udp |
| US | 20.231.121.79:80 | tcp | |
| US | 8.8.8.8:53 | 90.57.201.195.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 183.142.211.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 50.23.12.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 56.126.166.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 65.139.73.23.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 241.197.17.2.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 11.227.111.52.in-addr.arpa | udp |
Files
memory/3388-0-0x0000000000CA0000-0x0000000000FC4000-memory.dmp
memory/3388-1-0x00007FFD6A3A0000-0x00007FFD6AE61000-memory.dmp
memory/3388-2-0x000000001BDA0000-0x000000001BDB0000-memory.dmp
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
| MD5 | 293e5793dea329af168463e35950c84a |
| SHA1 | 790fb958938ab09415b8c61deb0d164a24dad596 |
| SHA256 | eddbc56dadb4921c99e30d4637b61238b6b2188b5db86f47bc720cbbb5b15bc7 |
| SHA512 | 0b5cd07cb0f8aa1a74a864c737d4447c0bd370cbbfe07d3014c2ec7a355bae5df84674238d105396a30dc37c0c0606870d0dc4f69f1068c849ceb72cae0c39a7 |
memory/1916-9-0x00007FFD6A3A0000-0x00007FFD6AE61000-memory.dmp
memory/3388-8-0x00007FFD6A3A0000-0x00007FFD6AE61000-memory.dmp
memory/1916-10-0x000000001B540000-0x000000001B550000-memory.dmp
memory/1916-11-0x000000001C120000-0x000000001C170000-memory.dmp
memory/1916-12-0x000000001C230000-0x000000001C2E2000-memory.dmp
memory/1916-16-0x000000001CD30000-0x000000001CD6C000-memory.dmp
memory/1916-15-0x000000001C1B0000-0x000000001C1C2000-memory.dmp
memory/1916-17-0x00007FFD6A3A0000-0x00007FFD6AE61000-memory.dmp