Analysis Overview
SHA256
597a26bc8399acff834bbce2ccbe7d5bab0e190e7f9163c2bce5feacc7f77ee9
Threat Level: Known bad
The file Client-built.exe was found to be: Known bad.
Malicious Activity Summary
Quasar RAT
Quasar family
Quasar payload
Executes dropped EXE
Enumerates physical storage devices
Unsigned PE
Suspicious use of SendNotifyMessage
Scheduled Task/Job: Scheduled Task
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
Suspicious use of WriteProcessMemory
Uses Task Scheduler COM API
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-11-03 07:17
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
2024-11-03 07:17
Reported
2024-11-03 07:19
Platform
win7-20240903-en
Max time kernel
126s
Max time network
137s
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 |
| 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-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 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 |
| N/A | 192.168.0.18:4782 | tcp | |
| N/A | 192.168.0.18:4782 | tcp | |
| N/A | 192.168.0.18:4782 | tcp | |
| N/A | 192.168.0.18:4782 | tcp | |
| N/A | 192.168.0.18:4782 | tcp | |
| N/A | 192.168.0.18:4782 | tcp |
Files
memory/2464-0-0x000007FEF6033000-0x000007FEF6034000-memory.dmp
memory/2464-1-0x0000000000D20000-0x0000000001044000-memory.dmp
memory/2464-2-0x000007FEF6030000-0x000007FEF6A1C000-memory.dmp
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
| MD5 | 671df8e1c2f83f10f1cfb3f447299806 |
| SHA1 | 9586ee12e49e5fbac96adfd5f3d59e4dfb8393f0 |
| SHA256 | 597a26bc8399acff834bbce2ccbe7d5bab0e190e7f9163c2bce5feacc7f77ee9 |
| SHA512 | 097a01e399d7527b0fc2bf952e7153d56b255897ef3f219cbd32938072d4ea66e62894d66f6b0ca80fbfda5c02738497d60c2ea415b0f900941a9c3121619690 |
memory/2920-7-0x000007FEF6030000-0x000007FEF6A1C000-memory.dmp
memory/2464-9-0x000007FEF6030000-0x000007FEF6A1C000-memory.dmp
memory/2920-8-0x0000000000B40000-0x0000000000E64000-memory.dmp
memory/2920-10-0x000007FEF6030000-0x000007FEF6A1C000-memory.dmp
memory/2920-11-0x000007FEF6030000-0x000007FEF6A1C000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-11-03 07:17
Reported
2024-11-03 07:19
Platform
win10v2004-20241007-en
Max time kernel
148s
Max time network
151s
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-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 WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 1112 wrote to memory of 3708 | N/A | C:\Users\Admin\AppData\Local\Temp\Client-built.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 1112 wrote to memory of 3708 | N/A | C:\Users\Admin\AppData\Local\Temp\Client-built.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 1112 wrote to memory of 4044 | N/A | C:\Users\Admin\AppData\Local\Temp\Client-built.exe | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe |
| PID 1112 wrote to memory of 4044 | N/A | C:\Users\Admin\AppData\Local\Temp\Client-built.exe | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe |
| PID 4044 wrote to memory of 2164 | N/A | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 4044 wrote to memory of 2164 | 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 | 196.249.167.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 83.210.23.2.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 95.221.229.192.in-addr.arpa | udp |
| N/A | 192.168.0.18:4782 | tcp | |
| N/A | 192.168.0.18:4782 | tcp | |
| US | 8.8.8.8:53 | 53.210.109.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 171.39.242.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 172.210.232.199.in-addr.arpa | udp |
| N/A | 192.168.0.18:4782 | tcp | |
| US | 8.8.8.8:53 | 88.210.23.2.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 43.58.199.20.in-addr.arpa | udp |
| N/A | 192.168.0.18:4782 | tcp | |
| US | 8.8.8.8:53 | 30.243.111.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | tse1.mm.bing.net | udp |
| US | 150.171.27.10:443 | tse1.mm.bing.net | tcp |
| US | 150.171.27.10:443 | tse1.mm.bing.net | tcp |
| US | 150.171.27.10:443 | tse1.mm.bing.net | tcp |
| US | 150.171.27.10:443 | tse1.mm.bing.net | tcp |
| US | 150.171.27.10:443 | tse1.mm.bing.net | tcp |
| US | 8.8.8.8:53 | 26.35.223.20.in-addr.arpa | udp |
| N/A | 192.168.0.18:4782 | tcp | |
| N/A | 192.168.0.18:4782 | tcp |
Files
memory/1112-0-0x00007FF940713000-0x00007FF940715000-memory.dmp
memory/1112-1-0x0000000000220000-0x0000000000544000-memory.dmp
memory/1112-2-0x00007FF940710000-0x00007FF9411D1000-memory.dmp
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
| MD5 | 671df8e1c2f83f10f1cfb3f447299806 |
| SHA1 | 9586ee12e49e5fbac96adfd5f3d59e4dfb8393f0 |
| SHA256 | 597a26bc8399acff834bbce2ccbe7d5bab0e190e7f9163c2bce5feacc7f77ee9 |
| SHA512 | 097a01e399d7527b0fc2bf952e7153d56b255897ef3f219cbd32938072d4ea66e62894d66f6b0ca80fbfda5c02738497d60c2ea415b0f900941a9c3121619690 |
memory/1112-9-0x00007FF940710000-0x00007FF9411D1000-memory.dmp
memory/4044-8-0x00007FF940710000-0x00007FF9411D1000-memory.dmp
memory/4044-10-0x00007FF940710000-0x00007FF9411D1000-memory.dmp
memory/4044-11-0x000000001CA90000-0x000000001CAE0000-memory.dmp
memory/4044-12-0x000000001CBA0000-0x000000001CC52000-memory.dmp
memory/4044-13-0x00007FF940710000-0x00007FF9411D1000-memory.dmp