Analysis Overview
SHA256
78d043a6604624a4dbce3e3b284e49a297768218407213f17b5bfce17d97b6d5
Threat Level: Known bad
The file fa3f8212e3f1cf885d35ea36ef891350N.exe was found to be: Known bad.
Malicious Activity Summary
Quasar payload
Quasar RAT
Quasar family
Executes dropped EXE
Unsigned PE
Suspicious use of WriteProcessMemory
Scheduled Task/Job: Scheduled Task
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Uses Task Scheduler COM API
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-08-04 20:22
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
2024-08-04 20:22
Reported
2024-08-04 20:24
Platform
win7-20240729-en
Max time kernel
119s
Max time network
120s
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 |
| 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 |
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\fa3f8212e3f1cf885d35ea36ef891350N.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe | N/A |
Suspicious use of SetWindowsHookEx
| 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\fa3f8212e3f1cf885d35ea36ef891350N.exe
"C:\Users\Admin\AppData\Local\Temp\fa3f8212e3f1cf885d35ea36ef891350N.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 | 192.168.1.19:4782 | tcp | |
| N/A | 192.168.1.19:4782 | tcp | |
| N/A | 192.168.1.19:4782 | tcp | |
| N/A | 192.168.1.19:4782 | tcp | |
| N/A | 192.168.1.19:4782 | tcp |
Files
memory/2088-0-0x000007FEF6183000-0x000007FEF6184000-memory.dmp
memory/2088-1-0x0000000001070000-0x0000000001394000-memory.dmp
memory/2088-2-0x000007FEF6180000-0x000007FEF6B6C000-memory.dmp
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
| MD5 | fa3f8212e3f1cf885d35ea36ef891350 |
| SHA1 | 49759e579fffe208716703aed27aa057913a6e08 |
| SHA256 | 78d043a6604624a4dbce3e3b284e49a297768218407213f17b5bfce17d97b6d5 |
| SHA512 | 98343b8274d5036613f04e17315de729e780f2441ba7be5d9f6bef2f314124c6caf8dd170f1b6479c9ec37225ebf40672f2303bb6814f018683a14a7cc166a0f |
memory/2452-8-0x000007FEF6180000-0x000007FEF6B6C000-memory.dmp
memory/2088-10-0x000007FEF6180000-0x000007FEF6B6C000-memory.dmp
memory/2452-9-0x0000000001030000-0x0000000001354000-memory.dmp
memory/2452-11-0x000007FEF6180000-0x000007FEF6B6C000-memory.dmp
memory/2452-12-0x000007FEF6180000-0x000007FEF6B6C000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-08-04 20:22
Reported
2024-08-04 20:24
Platform
win10v2004-20240802-en
Max time kernel
101s
Max time network
118s
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 |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe | N/A |
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\fa3f8212e3f1cf885d35ea36ef891350N.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe | N/A |
Suspicious use of SetWindowsHookEx
| 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 3264 wrote to memory of 3028 | N/A | C:\Users\Admin\AppData\Local\Temp\fa3f8212e3f1cf885d35ea36ef891350N.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 3264 wrote to memory of 3028 | N/A | C:\Users\Admin\AppData\Local\Temp\fa3f8212e3f1cf885d35ea36ef891350N.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 3264 wrote to memory of 4148 | N/A | C:\Users\Admin\AppData\Local\Temp\fa3f8212e3f1cf885d35ea36ef891350N.exe | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe |
| PID 3264 wrote to memory of 4148 | N/A | C:\Users\Admin\AppData\Local\Temp\fa3f8212e3f1cf885d35ea36ef891350N.exe | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe |
| PID 4148 wrote to memory of 2352 | N/A | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 4148 wrote to memory of 2352 | 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\fa3f8212e3f1cf885d35ea36ef891350N.exe
"C:\Users\Admin\AppData\Local\Temp\fa3f8212e3f1cf885d35ea36ef891350N.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 | g.bing.com | udp |
| US | 204.79.197.237:443 | g.bing.com | tcp |
| US | 8.8.8.8:53 | 237.197.79.204.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 240.221.184.93.in-addr.arpa | udp |
| N/A | 192.168.1.19:4782 | tcp | |
| US | 8.8.8.8:53 | 73.159.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 58.99.105.20.in-addr.arpa | udp |
| N/A | 192.168.1.19:4782 | tcp | |
| US | 8.8.8.8:53 | 103.169.127.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 56.126.166.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 147.142.123.92.in-addr.arpa | udp |
| N/A | 192.168.1.19:4782 | tcp | |
| US | 8.8.8.8:53 | 42.56.20.217.in-addr.arpa | udp |
| N/A | 192.168.1.19:4782 | tcp | |
| US | 8.8.8.8:53 | 25.140.123.92.in-addr.arpa | udp |
| N/A | 192.168.1.19:4782 | tcp |
Files
memory/3264-0-0x00007FFBA6B53000-0x00007FFBA6B55000-memory.dmp
memory/3264-1-0x0000000000170000-0x0000000000494000-memory.dmp
memory/3264-2-0x00007FFBA6B50000-0x00007FFBA7611000-memory.dmp
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
| MD5 | fa3f8212e3f1cf885d35ea36ef891350 |
| SHA1 | 49759e579fffe208716703aed27aa057913a6e08 |
| SHA256 | 78d043a6604624a4dbce3e3b284e49a297768218407213f17b5bfce17d97b6d5 |
| SHA512 | 98343b8274d5036613f04e17315de729e780f2441ba7be5d9f6bef2f314124c6caf8dd170f1b6479c9ec37225ebf40672f2303bb6814f018683a14a7cc166a0f |
memory/4148-10-0x00007FFBA6B50000-0x00007FFBA7611000-memory.dmp
memory/3264-9-0x00007FFBA6B50000-0x00007FFBA7611000-memory.dmp
memory/4148-11-0x00007FFBA6B50000-0x00007FFBA7611000-memory.dmp
memory/4148-12-0x000000001BAA0000-0x000000001BAF0000-memory.dmp
memory/4148-13-0x000000001C2B0000-0x000000001C362000-memory.dmp
memory/4148-14-0x00007FFBA6B50000-0x00007FFBA7611000-memory.dmp