Analysis Overview
SHA256
f6fe8fbbafb40ded2572c45d74740d6aa5a7bd6149e2ec2ddedf9030b7411228
Threat Level: Known bad
The file client.exe was found to be: Known bad.
Malicious Activity Summary
Quasar RAT
Quasar family
Quasar payload
Drops file in Drivers directory
Executes dropped EXE
Drops file in System32 directory
Unsigned PE
Creates scheduled task(s)
Suspicious use of WriteProcessMemory
Uses Task Scheduler COM API
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-05-25 01:23
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 01:23
Reported
2024-05-25 01:53
Platform
win11-20240426-en
Max time kernel
1794s
Max time network
1799s
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 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 |
| File opened for modification | C:\Windows\system32\drivers\watchdog.exe | C:\Windows\system32\drivers\watchdog.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 3312 wrote to memory of 3356 | N/A | C:\Users\Admin\AppData\Local\Temp\client.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 3312 wrote to memory of 3356 | N/A | C:\Users\Admin\AppData\Local\Temp\client.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 3312 wrote to memory of 3268 | N/A | C:\Users\Admin\AppData\Local\Temp\client.exe | C:\Windows\system32\drivers\watchdog.exe |
| PID 3312 wrote to memory of 3268 | N/A | C:\Users\Admin\AppData\Local\Temp\client.exe | C:\Windows\system32\drivers\watchdog.exe |
| PID 3268 wrote to memory of 2220 | N/A | C:\Windows\system32\drivers\watchdog.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 3268 wrote to memory of 2220 | 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 |
| CA | 142.115.43.143:8080 | tcp | |
| US | 8.8.8.8:53 | 8.8.8.8.in-addr.arpa | udp |
| CA | 142.115.43.143:8080 | tcp | |
| CA | 142.115.43.143:8080 | tcp | |
| CA | 142.115.43.143:8080 | tcp | |
| CA | 142.115.43.143:8080 | tcp | |
| CA | 142.115.43.143:8080 | tcp | |
| CA | 142.115.43.143:8080 | tcp | |
| CA | 142.115.43.143:8080 | tcp | |
| CA | 142.115.43.143:8080 | tcp | |
| CA | 142.115.43.143:8080 | tcp | |
| CA | 142.115.43.143:8080 | tcp | |
| CA | 142.115.43.143:8080 | tcp | |
| CA | 142.115.43.143:8080 | tcp | |
| CA | 142.115.43.143:8080 | tcp | |
| US | 8.8.8.8:53 | 172.210.232.199.in-addr.arpa | udp |
| CA | 142.115.43.143:8080 | tcp | |
| CA | 142.115.43.143:8080 | tcp | |
| CA | 142.115.43.143:8080 | tcp | |
| CA | 142.115.43.143:8080 | tcp | |
| CA | 142.115.43.143:8080 | tcp | |
| CA | 142.115.43.143:8080 | tcp | |
| CA | 142.115.43.143:8080 | tcp | |
| CA | 142.115.43.143:8080 | tcp | |
| CA | 142.115.43.143:8080 | tcp | |
| CA | 142.115.43.143:8080 | tcp | |
| CA | 142.115.43.143:8080 | tcp | |
| CA | 142.115.43.143:8080 | tcp | |
| CA | 142.115.43.143:8080 | tcp | |
| CA | 142.115.43.143:8080 | tcp | |
| CA | 142.115.43.143:8080 | tcp | |
| CA | 142.115.43.143:8080 | tcp | |
| CA | 142.115.43.143:8080 | tcp | |
| CA | 142.115.43.143:8080 | tcp | |
| CA | 142.115.43.143:8080 | tcp | |
| CA | 142.115.43.143:8080 | tcp | |
| CA | 142.115.43.143:8080 | tcp | |
| CA | 142.115.43.143:8080 | tcp | |
| CA | 142.115.43.143:8080 | tcp | |
| CA | 142.115.43.143:8080 | tcp | |
| CA | 142.115.43.143:8080 | tcp | |
| CA | 142.115.43.143:8080 | tcp | |
| CA | 142.115.43.143:8080 | tcp | |
| CA | 142.115.43.143:8080 | tcp | |
| CA | 142.115.43.143:8080 | tcp | |
| CA | 142.115.43.143:8080 | tcp | |
| CA | 142.115.43.143:8080 | tcp | |
| CA | 142.115.43.143:8080 | tcp | |
| CA | 142.115.43.143:8080 | tcp | |
| CA | 142.115.43.143:8080 | tcp | |
| CA | 142.115.43.143:8080 | tcp | |
| CA | 142.115.43.143:8080 | tcp | |
| CA | 142.115.43.143:8080 | tcp | |
| CA | 142.115.43.143:8080 | tcp | |
| CA | 142.115.43.143:8080 | tcp | |
| CA | 142.115.43.143:8080 | tcp | |
| CA | 142.115.43.143:8080 | tcp | |
| CA | 142.115.43.143:8080 | tcp | |
| CA | 142.115.43.143:8080 | tcp | |
| NL | 23.62.61.194:443 | www.bing.com | tcp |
| US | 8.8.8.8:53 | 69.31.126.40.in-addr.arpa | udp |
| CA | 142.115.43.143:8080 | tcp | |
| US | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
| US | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
| US | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
| US | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
| CA | 142.115.43.143:8080 | tcp | |
| CA | 142.115.43.143:8080 | tcp | |
| CA | 142.115.43.143:8080 | tcp | |
| CA | 142.115.43.143:8080 | tcp | |
| CA | 142.115.43.143:8080 | tcp | |
| CA | 142.115.43.143:8080 | tcp | |
| CA | 142.115.43.143:8080 | tcp | |
| CA | 142.115.43.143:8080 | tcp | |
| CA | 142.115.43.143:8080 | tcp | |
| CA | 142.115.43.143:8080 | tcp | |
| CA | 142.115.43.143:8080 | tcp | |
| CA | 142.115.43.143:8080 | tcp | |
| CA | 142.115.43.143:8080 | tcp | |
| CA | 142.115.43.143:8080 | tcp | |
| CA | 142.115.43.143:8080 | tcp | |
| CA | 142.115.43.143:8080 | tcp |
Files
memory/3312-0-0x00007FFAF1663000-0x00007FFAF1665000-memory.dmp
memory/3312-1-0x0000000000910000-0x0000000000C34000-memory.dmp
memory/3312-2-0x00007FFAF1660000-0x00007FFAF2122000-memory.dmp
C:\Windows\System32\drivers\watchdog.exe
| MD5 | 3923567323be44b3a3955f8b69585396 |
| SHA1 | c2db51125c1d664ac02e9ea28fbe4fb6fc47e59a |
| SHA256 | f6fe8fbbafb40ded2572c45d74740d6aa5a7bd6149e2ec2ddedf9030b7411228 |
| SHA512 | 5d410bfeb594674195c46dbd228c4967e5df07bd3b6fe3d16a8be48690d58354d4448e35b9fc7a99bca720ed104d6e24be8fd8d8abc31392ccd55a556da14dca |
memory/3268-9-0x00007FFAF1660000-0x00007FFAF2122000-memory.dmp
memory/3312-10-0x00007FFAF1660000-0x00007FFAF2122000-memory.dmp
memory/3268-11-0x00007FFAF1660000-0x00007FFAF2122000-memory.dmp
memory/3268-12-0x000000001BA00000-0x000000001BA50000-memory.dmp
memory/3268-13-0x000000001BB10000-0x000000001BBC2000-memory.dmp
memory/3268-14-0x00007FFAF1660000-0x00007FFAF2122000-memory.dmp