Analysis Overview
SHA256
d2422e4e839fa1da5bdb80a4762ba07c26c6134eb9f00e691894ec5312024c83
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
Unsigned PE
Enumerates physical storage devices
Scheduled Task/Job: Scheduled Task
Suspicious use of AdjustPrivilegeToken
Suspicious use of SendNotifyMessage
Suspicious use of WriteProcessMemory
Uses Task Scheduler COM API
Suspicious use of FindShellTrayWindow
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-11-05 04:29
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
2024-11-05 04:29
Reported
2024-11-05 04:46
Platform
win10ltsc2021-20241023-en
Max time kernel
1034s
Max time network
1050s
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 764 wrote to memory of 3688 | N/A | C:\Users\Admin\AppData\Local\Temp\Client-built.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 764 wrote to memory of 3688 | N/A | C:\Users\Admin\AppData\Local\Temp\Client-built.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 764 wrote to memory of 924 | N/A | C:\Users\Admin\AppData\Local\Temp\Client-built.exe | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe |
| PID 764 wrote to memory of 924 | N/A | C:\Users\Admin\AppData\Local\Temp\Client-built.exe | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe |
| PID 924 wrote to memory of 1460 | N/A | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 924 wrote to memory of 1460 | 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 | 13.86.106.20.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 |
| N/A | 10.127.1.127:4782 | tcp | |
| US | 8.8.8.8:53 | 104.219.191.52.in-addr.arpa | udp |
| N/A | 10.127.1.127:4782 | tcp | |
| US | 8.8.8.8:53 | 197.87.175.4.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 198.187.3.20.in-addr.arpa | udp |
| N/A | 10.127.1.127:4782 | tcp | |
| US | 8.8.8.8:53 | 88.210.23.2.in-addr.arpa | udp |
| N/A | 10.127.1.127:4782 | tcp | |
| N/A | 10.127.1.127:4782 | tcp | |
| N/A | 10.127.1.127:4782 | tcp | |
| N/A | 10.127.1.127:4782 | tcp | |
| US | 8.8.8.8:53 | 28.173.189.20.in-addr.arpa | udp |
| N/A | 10.127.1.127:4782 | tcp | |
| N/A | 10.127.1.127:4782 | tcp | |
| N/A | 10.127.1.127:4782 | tcp | |
| N/A | 10.127.1.127:4782 | tcp | |
| N/A | 10.127.1.127:4782 | tcp | |
| N/A | 10.127.1.127:4782 | tcp | |
| N/A | 10.127.1.127:4782 | tcp | |
| N/A | 10.127.1.127:4782 | tcp | |
| N/A | 10.127.1.127:4782 | tcp | |
| N/A | 10.127.1.127:4782 | tcp | |
| N/A | 10.127.1.127:4782 | tcp | |
| N/A | 10.127.1.127:4782 | tcp | |
| N/A | 10.127.1.127:4782 | tcp | |
| N/A | 10.127.1.127:4782 | tcp | |
| N/A | 10.127.1.127:4782 | tcp | |
| N/A | 10.127.1.127:4782 | tcp | |
| N/A | 10.127.1.127:4782 | tcp | |
| N/A | 10.127.1.127:4782 | tcp | |
| N/A | 10.127.1.127:4782 | tcp | |
| N/A | 10.127.1.127:4782 | tcp | |
| N/A | 10.127.1.127:4782 | tcp | |
| N/A | 10.127.1.127:4782 | tcp | |
| N/A | 10.127.1.127:4782 | tcp | |
| N/A | 10.127.1.127:4782 | tcp | |
| N/A | 10.127.1.127:4782 | tcp | |
| N/A | 10.127.1.127:4782 | tcp | |
| N/A | 10.127.1.127:4782 | tcp | |
| N/A | 10.127.1.127:4782 | tcp | |
| N/A | 10.127.1.127:4782 | tcp | |
| N/A | 10.127.1.127:4782 | tcp | |
| N/A | 10.127.1.127:4782 | tcp | |
| N/A | 10.127.1.127:4782 | tcp | |
| N/A | 10.127.1.127:4782 | tcp | |
| N/A | 10.127.1.127:4782 | tcp | |
| N/A | 10.127.1.127:4782 | tcp | |
| N/A | 10.127.1.127:4782 | tcp |
Files
memory/764-0-0x00007FFB80023000-0x00007FFB80025000-memory.dmp
memory/764-1-0x00000000002F0000-0x0000000000614000-memory.dmp
memory/764-2-0x00007FFB80020000-0x00007FFB80AE2000-memory.dmp
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
| MD5 | fef7fc18a56919307292dad1b0481e8e |
| SHA1 | 1b4cc3b74a2c5c43cad76cf12f7b03dafe6dad3a |
| SHA256 | d2422e4e839fa1da5bdb80a4762ba07c26c6134eb9f00e691894ec5312024c83 |
| SHA512 | 6fd9b368c64364b28e35a972fe5dc25f3afc3ce13ab4bb8764c9a80018bf97b1c6e13b2026750dc5dc08909a3f7054b85c5d23ef59217489f1d7807e3132e568 |
memory/764-5-0x00007FFB80020000-0x00007FFB80AE2000-memory.dmp
memory/924-6-0x00007FFB80020000-0x00007FFB80AE2000-memory.dmp
memory/924-7-0x00007FFB80020000-0x00007FFB80AE2000-memory.dmp
memory/924-8-0x000000001C440000-0x000000001C490000-memory.dmp
memory/924-9-0x000000001C550000-0x000000001C602000-memory.dmp
memory/924-10-0x00007FFB80020000-0x00007FFB80AE2000-memory.dmp