Analysis Overview
SHA256
f8f2be9448bb64d2d67b6b9f724e5668a1584831aece7d49f9956b283aca77be
Threat Level: Known bad
The file Client-built3.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
Uses Task Scheduler COM API
Scheduled Task/Job: Scheduled Task
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
Suspicious use of SendNotifyMessage
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-10-31 06:54
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 06:54
Reported
2024-10-31 06:57
Platform
win7-20240903-en
Max time kernel
149s
Max time network
150s
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-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
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 |
| N/A | 10.127.0.200:4782 | tcp | |
| N/A | 10.127.0.200:4782 | tcp | |
| N/A | 10.127.0.200:4782 | tcp | |
| N/A | 10.127.0.200:4782 | tcp | |
| N/A | 10.127.0.200:4782 | tcp | |
| N/A | 10.127.0.200:4782 | tcp | |
| N/A | 10.127.0.200:4782 | tcp |
Files
memory/2132-0-0x000007FEF5193000-0x000007FEF5194000-memory.dmp
memory/2132-1-0x0000000000390000-0x00000000006B4000-memory.dmp
memory/2132-2-0x000007FEF5190000-0x000007FEF5B7C000-memory.dmp
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
| MD5 | 0ba12b4cf0e785325ef57b8addc70899 |
| SHA1 | 6ebc9ef072f738e0d89a286f08e359ceacff0095 |
| SHA256 | f8f2be9448bb64d2d67b6b9f724e5668a1584831aece7d49f9956b283aca77be |
| SHA512 | 5badb694a5318058f8d016258bc8c50886e8ebf753b97a95116dfb66e39061297ede0228aa9fa95b3f0614d70326aafb0f8bad4318993ef05f288e4a249a6889 |
memory/1704-8-0x0000000000F00000-0x0000000001224000-memory.dmp
memory/2132-7-0x000007FEF5190000-0x000007FEF5B7C000-memory.dmp
memory/1704-10-0x000007FEF5190000-0x000007FEF5B7C000-memory.dmp
memory/1704-9-0x000007FEF5190000-0x000007FEF5B7C000-memory.dmp
memory/1704-11-0x000007FEF5190000-0x000007FEF5B7C000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-10-31 06:54
Reported
2024-10-31 06:57
Platform
win10v2004-20241007-en
Max time kernel
150s
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-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 632 wrote to memory of 1240 | N/A | C:\Users\Admin\AppData\Local\Temp\Client-built3.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 632 wrote to memory of 1240 | N/A | C:\Users\Admin\AppData\Local\Temp\Client-built3.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 632 wrote to memory of 384 | N/A | C:\Users\Admin\AppData\Local\Temp\Client-built3.exe | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe |
| PID 632 wrote to memory of 384 | N/A | C:\Users\Admin\AppData\Local\Temp\Client-built3.exe | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe |
| PID 384 wrote to memory of 1764 | N/A | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 384 wrote to memory of 1764 | 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 | 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 | 69.209.201.84.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 |
| N/A | 10.127.0.200:4782 | tcp | |
| US | 8.8.8.8:53 | 205.47.74.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 104.219.191.52.in-addr.arpa | udp |
| N/A | 10.127.0.200:4782 | tcp | |
| US | 8.8.8.8:53 | 200.163.202.172.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 198.187.3.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 69.190.18.2.in-addr.arpa | udp |
| N/A | 10.127.0.200:4782 | tcp | |
| US | 8.8.8.8:53 | 172.210.232.199.in-addr.arpa | udp |
| N/A | 10.127.0.200:4782 | tcp | |
| US | 8.8.8.8:53 | 31.243.111.52.in-addr.arpa | udp |
| N/A | 10.127.0.200:4782 | tcp | |
| US | 8.8.8.8:53 | 43.58.199.20.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 |
| N/A | 10.127.0.200:4782 | tcp | |
| US | 8.8.8.8:53 | 85.65.42.20.in-addr.arpa | udp |
Files
memory/632-0-0x00007FF95A713000-0x00007FF95A715000-memory.dmp
memory/632-1-0x00000000006E0000-0x0000000000A04000-memory.dmp
memory/632-2-0x00007FF95A710000-0x00007FF95B1D1000-memory.dmp
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
| MD5 | 0ba12b4cf0e785325ef57b8addc70899 |
| SHA1 | 6ebc9ef072f738e0d89a286f08e359ceacff0095 |
| SHA256 | f8f2be9448bb64d2d67b6b9f724e5668a1584831aece7d49f9956b283aca77be |
| SHA512 | 5badb694a5318058f8d016258bc8c50886e8ebf753b97a95116dfb66e39061297ede0228aa9fa95b3f0614d70326aafb0f8bad4318993ef05f288e4a249a6889 |
memory/632-8-0x00007FF95A710000-0x00007FF95B1D1000-memory.dmp
memory/384-9-0x00007FF95A710000-0x00007FF95B1D1000-memory.dmp
memory/384-10-0x00007FF95A710000-0x00007FF95B1D1000-memory.dmp
memory/384-11-0x000000001C3E0000-0x000000001C430000-memory.dmp
memory/384-12-0x000000001C4F0000-0x000000001C5A2000-memory.dmp
memory/384-13-0x00007FF95A710000-0x00007FF95B1D1000-memory.dmp