Analysis Overview
SHA256
98b29ab07038ed53a9842ae6d9cf0991f0ce4ac54036ce5b703ef441be70b797
Threat Level: Known bad
The file Client-built2.exe was found to be: Known bad.
Malicious Activity Summary
Quasar family
Quasar payload
Quasar RAT
Executes dropped EXE
Enumerates physical storage devices
Unsigned PE
Suspicious use of FindShellTrayWindow
Suspicious use of WriteProcessMemory
Uses Task Scheduler COM API
Scheduled Task/Job: Scheduled Task
Suspicious use of AdjustPrivilegeToken
Suspicious use of SendNotifyMessage
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-10-31 06:43
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
2024-10-31 06:43
Reported
2024-10-31 06:46
Platform
win10ltsc2021-20241023-en
Max time kernel
127s
Max time network
144s
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\Client.exe | N/A |
Enumerates physical storage devices
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\Client-built2.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 WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 3172 wrote to memory of 744 | N/A | C:\Users\Admin\AppData\Local\Temp\Client-built2.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 3172 wrote to memory of 744 | N/A | C:\Users\Admin\AppData\Local\Temp\Client-built2.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 3172 wrote to memory of 1124 | N/A | C:\Users\Admin\AppData\Local\Temp\Client-built2.exe | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe |
| PID 3172 wrote to memory of 1124 | N/A | C:\Users\Admin\AppData\Local\Temp\Client-built2.exe | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe |
| PID 1124 wrote to memory of 1284 | N/A | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 1124 wrote to memory of 1284 | 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-built2.exe
"C:\Users\Admin\AppData\Local\Temp\Client-built2.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 | 241.150.49.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 79.190.18.2.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 71.31.126.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 95.221.229.192.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 154.239.44.20.in-addr.arpa | udp |
| N/A | 10.127.0.200:4782 | tcp | |
| US | 8.8.8.8:53 | 97.17.167.52.in-addr.arpa | udp |
| N/A | 10.127.0.200:4782 | tcp | |
| US | 8.8.8.8:53 | 56.163.245.4.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 206.23.85.13.in-addr.arpa | udp |
| N/A | 10.127.0.200:4782 | tcp | |
| N/A | 10.127.0.200:4782 | tcp | |
| US | 8.8.8.8:53 | 22.236.111.52.in-addr.arpa | udp |
| N/A | 10.127.0.200:4782 | tcp | |
| N/A | 10.127.0.200:4782 | tcp |
Files
memory/3172-0-0x00007FF8F12D3000-0x00007FF8F12D5000-memory.dmp
memory/3172-1-0x0000000000A90000-0x0000000000DB4000-memory.dmp
memory/3172-2-0x00007FF8F12D0000-0x00007FF8F1D92000-memory.dmp
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
| MD5 | 600063adc2e3df654e26b40d7fcd5252 |
| SHA1 | 03abd84e486da6ecdcc9f1acd5f89f0c5026daab |
| SHA256 | 98b29ab07038ed53a9842ae6d9cf0991f0ce4ac54036ce5b703ef441be70b797 |
| SHA512 | f4075584ec0a4ba56d4292b3f7d80ed6f4fc02c143a7e521e0c1838e1115870ca1e5f1ec2f6948d18c914da0ea5ed9dcac765382943a74683eed2deed57365ac |
memory/3172-5-0x00007FF8F12D0000-0x00007FF8F1D92000-memory.dmp
memory/1124-6-0x00007FF8F12D0000-0x00007FF8F1D92000-memory.dmp
memory/1124-7-0x00007FF8F12D0000-0x00007FF8F1D92000-memory.dmp
memory/1124-8-0x000000001CBE0000-0x000000001CC30000-memory.dmp
memory/1124-9-0x000000001CCF0000-0x000000001CDA2000-memory.dmp
memory/1124-10-0x00007FF8F12D0000-0x00007FF8F1D92000-memory.dmp