Analysis Overview
SHA256
b42c4e3557412a2ec458d1e7e73501b84a9fcef3a9a0b5eed172d0af619c59c6
Threat Level: Known bad
The file Client-built.exe was found to be: Known bad.
Malicious Activity Summary
Quasar payload
Quasar family
Quasar RAT
Executes dropped EXE
Drops file in Program Files directory
Enumerates physical storage devices
Unsigned PE
Suspicious use of AdjustPrivilegeToken
Suspicious use of SendNotifyMessage
Uses Task Scheduler COM API
Suspicious use of FindShellTrayWindow
Scheduled Task/Job: Scheduled Task
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-12-14 09:43
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
2024-12-14 09:43
Reported
2024-12-14 09:45
Platform
win7-20240903-en
Max time kernel
126s
Max time network
136s
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:\Program Files\SubDir\Client.exe | N/A |
Drops file in Program Files directory
| Description | Indicator | Process | Target |
| File opened for modification | C:\Program Files\SubDir | C:\Users\Admin\AppData\Local\Temp\Client-built.exe | N/A |
| File opened for modification | C:\Program Files\SubDir\Client.exe | C:\Program Files\SubDir\Client.exe | N/A |
| File opened for modification | C:\Program Files\SubDir | C:\Program Files\SubDir\Client.exe | N/A |
| File created | C:\Program Files\SubDir\Client.exe | C:\Users\Admin\AppData\Local\Temp\Client-built.exe | N/A |
| File opened for modification | C:\Program Files\SubDir\Client.exe | C:\Users\Admin\AppData\Local\Temp\Client-built.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:\Program Files\SubDir\Client.exe | N/A |
Suspicious use of FindShellTrayWindow
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Program Files\SubDir\Client.exe | N/A |
Suspicious use of SendNotifyMessage
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Program Files\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:\Program Files\SubDir\Client.exe" /rl HIGHEST /f
C:\Program Files\SubDir\Client.exe
"C:\Program Files\SubDir\Client.exe"
C:\Windows\system32\schtasks.exe
"schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Program Files\SubDir\Client.exe" /rl HIGHEST /f
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | Waix-40247.portmap.host | udp |
| DE | 193.161.193.99:40247 | Waix-40247.portmap.host | tcp |
| DE | 193.161.193.99:40247 | Waix-40247.portmap.host | tcp |
| DE | 193.161.193.99:40247 | Waix-40247.portmap.host | tcp |
| DE | 193.161.193.99:40247 | Waix-40247.portmap.host | tcp |
| DE | 193.161.193.99:40247 | Waix-40247.portmap.host | tcp |
| DE | 193.161.193.99:40247 | Waix-40247.portmap.host | tcp |
Files
memory/2176-0-0x000007FEF5E23000-0x000007FEF5E24000-memory.dmp
memory/2176-1-0x0000000000A30000-0x0000000000D54000-memory.dmp
memory/2176-2-0x000007FEF5E20000-0x000007FEF680C000-memory.dmp
C:\Program Files\SubDir\Client.exe
| MD5 | 5d941424d5ea2bcacc9205837acc1dff |
| SHA1 | dad94e588db27fb9afabce3831f2bf4f6ed1e8f2 |
| SHA256 | b42c4e3557412a2ec458d1e7e73501b84a9fcef3a9a0b5eed172d0af619c59c6 |
| SHA512 | f3ef395430ccb27ab7fbac3b8b120aac0d93ac605b09862bfa3085005e9e241e6deee3def80ed7d6c8ae7a1c46c93400ad97f0049e5f79aefb05e65a82d1dab4 |
memory/2176-8-0x000007FEF5E20000-0x000007FEF680C000-memory.dmp
memory/2780-10-0x0000000001230000-0x0000000001554000-memory.dmp
memory/2780-9-0x000007FEF5E20000-0x000007FEF680C000-memory.dmp
memory/2780-11-0x000007FEF5E20000-0x000007FEF680C000-memory.dmp
memory/2780-12-0x000007FEF5E20000-0x000007FEF680C000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-12-14 09:43
Reported
2024-12-14 09:45
Platform
win10v2004-20241007-en
Max time kernel
127s
Max time network
148s
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:\Program Files\SubDir\Client.exe | N/A |
Drops file in Program Files directory
| Description | Indicator | Process | Target |
| File created | C:\Program Files\SubDir\Client.exe | C:\Users\Admin\AppData\Local\Temp\Client-built.exe | N/A |
| File opened for modification | C:\Program Files\SubDir\Client.exe | C:\Users\Admin\AppData\Local\Temp\Client-built.exe | N/A |
| File opened for modification | C:\Program Files\SubDir | C:\Users\Admin\AppData\Local\Temp\Client-built.exe | N/A |
| File opened for modification | C:\Program Files\SubDir\Client.exe | C:\Program Files\SubDir\Client.exe | N/A |
| File opened for modification | C:\Program Files\SubDir | C:\Program Files\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:\Program Files\SubDir\Client.exe | N/A |
Suspicious use of FindShellTrayWindow
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Program Files\SubDir\Client.exe | N/A |
Suspicious use of SendNotifyMessage
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Program Files\SubDir\Client.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 4484 wrote to memory of 3212 | N/A | C:\Users\Admin\AppData\Local\Temp\Client-built.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 4484 wrote to memory of 3212 | N/A | C:\Users\Admin\AppData\Local\Temp\Client-built.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 4484 wrote to memory of 964 | N/A | C:\Users\Admin\AppData\Local\Temp\Client-built.exe | C:\Program Files\SubDir\Client.exe |
| PID 4484 wrote to memory of 964 | N/A | C:\Users\Admin\AppData\Local\Temp\Client-built.exe | C:\Program Files\SubDir\Client.exe |
| PID 964 wrote to memory of 3556 | N/A | C:\Program Files\SubDir\Client.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 964 wrote to memory of 3556 | N/A | C:\Program Files\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:\Program Files\SubDir\Client.exe" /rl HIGHEST /f
C:\Program Files\SubDir\Client.exe
"C:\Program Files\SubDir\Client.exe"
C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Program Files\SubDir\Client.exe" /rl HIGHEST /f
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 8.8.8.8.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 196.249.167.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 172.214.232.199.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 73.159.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 95.221.229.192.in-addr.arpa | udp |
| US | 8.8.8.8:53 | Waix-40247.portmap.host | udp |
| DE | 193.161.193.99:40247 | Waix-40247.portmap.host | tcp |
| US | 8.8.8.8:53 | 97.17.167.52.in-addr.arpa | udp |
| DE | 193.161.193.99:40247 | Waix-40247.portmap.host | tcp |
| US | 8.8.8.8:53 | 200.163.202.172.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 206.23.85.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 21.49.80.91.in-addr.arpa | udp |
| DE | 193.161.193.99:40247 | Waix-40247.portmap.host | tcp |
| US | 8.8.8.8:53 | 83.210.23.2.in-addr.arpa | udp |
| DE | 193.161.193.99:40247 | Waix-40247.portmap.host | tcp |
| US | 8.8.8.8:53 | 11.227.111.52.in-addr.arpa | udp |
| DE | 193.161.193.99:40247 | Waix-40247.portmap.host | tcp |
| DE | 193.161.193.99:40247 | Waix-40247.portmap.host | tcp |
Files
memory/4484-0-0x00007FF8221A3000-0x00007FF8221A5000-memory.dmp
memory/4484-1-0x0000000000310000-0x0000000000634000-memory.dmp
memory/4484-2-0x00007FF8221A0000-0x00007FF822C61000-memory.dmp
C:\Program Files\SubDir\Client.exe
| MD5 | 5d941424d5ea2bcacc9205837acc1dff |
| SHA1 | dad94e588db27fb9afabce3831f2bf4f6ed1e8f2 |
| SHA256 | b42c4e3557412a2ec458d1e7e73501b84a9fcef3a9a0b5eed172d0af619c59c6 |
| SHA512 | f3ef395430ccb27ab7fbac3b8b120aac0d93ac605b09862bfa3085005e9e241e6deee3def80ed7d6c8ae7a1c46c93400ad97f0049e5f79aefb05e65a82d1dab4 |
memory/4484-9-0x00007FF8221A0000-0x00007FF822C61000-memory.dmp
memory/964-10-0x00007FF8221A0000-0x00007FF822C61000-memory.dmp
memory/964-11-0x00007FF8221A0000-0x00007FF822C61000-memory.dmp
memory/964-12-0x000000001C6E0000-0x000000001C730000-memory.dmp
memory/964-13-0x000000001C7F0000-0x000000001C8A2000-memory.dmp
memory/964-14-0x00007FF8221A0000-0x00007FF822C61000-memory.dmp