Analysis Overview
SHA256
f8f2be9448bb64d2d67b6b9f724e5668a1584831aece7d49f9956b283aca77be
Threat Level: Known bad
The file Client-built3.exe was found to be: Known bad.
Malicious Activity Summary
Quasar payload
Quasar family
Quasar RAT
Executes dropped EXE
Enumerates physical storage devices
Unsigned PE
Suspicious use of FindShellTrayWindow
Suspicious use of SendNotifyMessage
Suspicious use of WriteProcessMemory
Scheduled Task/Job: Scheduled Task
Suspicious use of AdjustPrivilegeToken
Uses Task Scheduler COM API
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-10-31 06:47
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 06:47
Reported
2024-10-31 06:49
Platform
win10ltsc2021-20241023-en
Max time kernel
126s
Max time network
146s
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-built3.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 2156 wrote to memory of 788 | N/A | C:\Users\Admin\AppData\Local\Temp\Client-built3.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 2156 wrote to memory of 788 | N/A | C:\Users\Admin\AppData\Local\Temp\Client-built3.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 2156 wrote to memory of 2260 | N/A | C:\Users\Admin\AppData\Local\Temp\Client-built3.exe | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe |
| PID 2156 wrote to memory of 2260 | N/A | C:\Users\Admin\AppData\Local\Temp\Client-built3.exe | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe |
| PID 2260 wrote to memory of 2288 | N/A | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 2260 wrote to memory of 2288 | 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-built3.exe
"C:\Users\Admin\AppData\Local\Temp\Client-built3.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 | 95.221.229.192.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 58.55.71.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 172.210.232.199.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 73.159.190.20.in-addr.arpa | udp |
| N/A | 10.127.0.200:4782 | tcp | |
| US | 8.8.8.8:53 | 217.106.137.52.in-addr.arpa | udp |
| N/A | 10.127.0.200:4782 | tcp | |
| US | 8.8.8.8:53 | fd.api.iris.microsoft.com | udp |
| FR | 20.199.58.43:443 | fd.api.iris.microsoft.com | tcp |
| US | 8.8.8.8:53 | 43.58.199.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 212.20.149.52.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 | |
| US | 8.8.8.8:53 | 79.190.18.2.in-addr.arpa | udp |
| N/A | 10.127.0.200:4782 | tcp | |
| US | 8.8.8.8:53 | 172.214.232.199.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 14.227.111.52.in-addr.arpa | udp |
| N/A | 10.127.0.200:4782 | tcp | |
| N/A | 10.127.0.200:4782 | tcp |
Files
memory/2156-0-0x00007FFB52CA3000-0x00007FFB52CA5000-memory.dmp
memory/2156-1-0x00000000007C0000-0x0000000000AE4000-memory.dmp
memory/2156-2-0x00007FFB52CA0000-0x00007FFB53762000-memory.dmp
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
| MD5 | 0ba12b4cf0e785325ef57b8addc70899 |
| SHA1 | 6ebc9ef072f738e0d89a286f08e359ceacff0095 |
| SHA256 | f8f2be9448bb64d2d67b6b9f724e5668a1584831aece7d49f9956b283aca77be |
| SHA512 | 5badb694a5318058f8d016258bc8c50886e8ebf753b97a95116dfb66e39061297ede0228aa9fa95b3f0614d70326aafb0f8bad4318993ef05f288e4a249a6889 |
memory/2260-6-0x00007FFB52CA0000-0x00007FFB53762000-memory.dmp
memory/2156-5-0x00007FFB52CA0000-0x00007FFB53762000-memory.dmp
memory/2260-7-0x00007FFB52CA0000-0x00007FFB53762000-memory.dmp
memory/2260-8-0x000000001D0C0000-0x000000001D110000-memory.dmp
memory/2260-9-0x000000001D1D0000-0x000000001D282000-memory.dmp
memory/2260-10-0x00007FFB52CA0000-0x00007FFB53762000-memory.dmp