Analysis Overview
SHA256
7869d203ee2ffc4d75d4d542cc2e3a970ca249d675e8bc7bd4f9cc85c80cab69
Threat Level: Known bad
The file client.exe was found to be: Known bad.
Malicious Activity Summary
Quasar family
Quasar payload
Quasar RAT
Drops file in Drivers directory
Executes dropped EXE
Drops file in System32 directory
Unsigned PE
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Uses Task Scheduler COM API
Creates scheduled task(s)
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-05-25 01:28
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
2024-05-25 01:28
Reported
2024-05-25 01:29
Platform
win10v2004-20240426-en
Max time kernel
30s
Max time network
31s
Command Line
Signatures
Quasar RAT
Quasar payload
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
Drops file in Drivers directory
| Description | Indicator | Process | Target |
| File opened for modification | C:\Windows\system32\drivers\watchdog.exe | C:\Windows\system32\drivers\watchdog.exe | N/A |
| File created | C:\Windows\system32\drivers\watchdog.exe | C:\Users\Admin\AppData\Local\Temp\client.exe | N/A |
| File opened for modification | C:\Windows\system32\drivers\watchdog.exe | C:\Users\Admin\AppData\Local\Temp\client.exe | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system32\drivers\watchdog.exe | N/A |
Drops file in System32 directory
| Description | Indicator | Process | Target |
| File opened for modification | C:\Windows\system32\drivers | C:\Users\Admin\AppData\Local\Temp\client.exe | N/A |
| File opened for modification | C:\Windows\system32\drivers | C:\Windows\system32\drivers\watchdog.exe | N/A |
Creates scheduled task(s)
| 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.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\system32\drivers\watchdog.exe | N/A |
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system32\drivers\watchdog.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 2864 wrote to memory of 776 | N/A | C:\Users\Admin\AppData\Local\Temp\client.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 2864 wrote to memory of 776 | N/A | C:\Users\Admin\AppData\Local\Temp\client.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 2864 wrote to memory of 2000 | N/A | C:\Users\Admin\AppData\Local\Temp\client.exe | C:\Windows\system32\drivers\watchdog.exe |
| PID 2864 wrote to memory of 2000 | N/A | C:\Users\Admin\AppData\Local\Temp\client.exe | C:\Windows\system32\drivers\watchdog.exe |
| PID 2000 wrote to memory of 4684 | N/A | C:\Windows\system32\drivers\watchdog.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 2000 wrote to memory of 4684 | N/A | C:\Windows\system32\drivers\watchdog.exe | C:\Windows\SYSTEM32\schtasks.exe |
Uses Task Scheduler COM API
Processes
C:\Users\Admin\AppData\Local\Temp\client.exe
"C:\Users\Admin\AppData\Local\Temp\client.exe"
C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "watchdog" /sc ONLOGON /tr "C:\Windows\system32\drivers\watchdog.exe" /rl HIGHEST /f
C:\Windows\system32\drivers\watchdog.exe
"C:\Windows\system32\drivers\watchdog.exe"
C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "watchdog" /sc ONLOGON /tr "C:\Windows\system32\drivers\watchdog.exe" /rl HIGHEST /f
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 154.239.44.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 172.210.232.199.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 64.159.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 95.221.229.192.in-addr.arpa | udp |
| CA | 142.115.43.39:8080 | tcp | |
| US | 8.8.8.8:53 | g.bing.com | udp |
| US | 204.79.197.237:443 | g.bing.com | tcp |
| NL | 23.62.61.194:443 | www.bing.com | tcp |
| US | 8.8.8.8:53 | ipwho.is | udp |
| DE | 195.201.57.90:443 | ipwho.is | tcp |
| US | 8.8.8.8:53 | 237.197.79.204.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 39.43.115.142.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 194.61.62.23.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 90.57.201.195.in-addr.arpa | udp |
| NL | 23.62.61.194:443 | www.bing.com | tcp |
Files
memory/2864-0-0x00007FF8C0683000-0x00007FF8C0685000-memory.dmp
memory/2864-1-0x0000000000750000-0x0000000000A74000-memory.dmp
memory/2864-2-0x00007FF8C0680000-0x00007FF8C1141000-memory.dmp
C:\Windows\System32\drivers\watchdog.exe
| MD5 | 4dfff8420e0d2f3a0e30a3ae8e005830 |
| SHA1 | 379546834fa347bdcf6a4aa1a9d956b540d33b55 |
| SHA256 | 7869d203ee2ffc4d75d4d542cc2e3a970ca249d675e8bc7bd4f9cc85c80cab69 |
| SHA512 | 6f4de859019a9ed236f6ddcbb03737c9e643368ae74fea3b36f7254a1b691448fb5f5befe4997554ed96f099309908f6b0a42d46161d3727d07620b1ecca94cb |
memory/2000-10-0x00007FF8C0680000-0x00007FF8C1141000-memory.dmp
memory/2864-9-0x00007FF8C0680000-0x00007FF8C1141000-memory.dmp
memory/2000-11-0x00007FF8C0680000-0x00007FF8C1141000-memory.dmp
memory/2000-12-0x0000000001AC0000-0x0000000001B10000-memory.dmp
memory/2000-13-0x000000001C5A0000-0x000000001C652000-memory.dmp
memory/2000-16-0x0000000003350000-0x0000000003362000-memory.dmp
memory/2000-17-0x000000001BDA0000-0x000000001BDDC000-memory.dmp
memory/2000-18-0x00007FF8C0680000-0x00007FF8C1141000-memory.dmp