Analysis Overview
SHA256
8b33b55bfc95d42f71f7a4556bf4ab365cc8a9657a9a48c4184cf8f4fd1cfdf8
Threat Level: Known bad
The file qqsar.zip was found to be: Known bad.
Malicious Activity Summary
Quasar RAT
Quasar family
Quasar payload
Executes dropped EXE
Unsigned PE
Suspicious use of SetWindowsHookEx
Scheduled Task/Job: Scheduled Task
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Uses Task Scheduler COM API
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-08-03 15:02
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
2024-08-03 15:02
Reported
2024-08-03 15:04
Platform
win7-20240704-en
Max time kernel
126s
Max time network
137s
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\windwsupdater.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\qqsarbuilder.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Roaming\SubDir\windwsupdater.exe | N/A |
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\SubDir\windwsupdater.exe | N/A |
Suspicious use of WriteProcessMemory
Uses Task Scheduler COM API
Processes
C:\Users\Admin\AppData\Local\Temp\qqsarbuilder.exe
"C:\Users\Admin\AppData\Local\Temp\qqsarbuilder.exe"
C:\Windows\system32\schtasks.exe
"schtasks" /create /tn "windwsupdater" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\windwsupdater.exe" /rl HIGHEST /f
C:\Users\Admin\AppData\Roaming\SubDir\windwsupdater.exe
"C:\Users\Admin\AppData\Roaming\SubDir\windwsupdater.exe"
C:\Windows\system32\schtasks.exe
"schtasks" /create /tn "windwsupdater" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\windwsupdater.exe" /rl HIGHEST /f
Network
| Country | Destination | Domain | Proto |
| N/A | 192.168.174.129:4782 | tcp | |
| N/A | 192.168.174.129:4782 | tcp | |
| N/A | 192.168.174.129:4782 | tcp | |
| N/A | 192.168.174.129:4782 | tcp | |
| N/A | 192.168.174.129:4782 | tcp | |
| N/A | 192.168.174.129:4782 | tcp |
Files
memory/1952-0-0x000007FEF51E3000-0x000007FEF51E4000-memory.dmp
memory/1952-1-0x00000000001A0000-0x00000000004C4000-memory.dmp
memory/1952-2-0x000007FEF51E0000-0x000007FEF5BCC000-memory.dmp
C:\Users\Admin\AppData\Roaming\SubDir\windwsupdater.exe
| MD5 | ea1ab6ce5932a3718821475f19feefea |
| SHA1 | 5ab97ce62532976abd93ed2cf56662b8ec15606c |
| SHA256 | 27f1a7bab299f2c36793116723e05be58c6edff36c07ba24a2703903cbdd6048 |
| SHA512 | e66fa91097b2f725503206bd7e92da486ffd17a9c8fab221387c1d3795e59afedae4fb791b9c530e2e25272a642964e63dc15fe081faed29289c332db8523838 |
memory/1952-8-0x000007FEF51E0000-0x000007FEF5BCC000-memory.dmp
memory/2128-10-0x000007FEF51E0000-0x000007FEF5BCC000-memory.dmp
memory/2128-9-0x0000000001170000-0x0000000001494000-memory.dmp
memory/2128-11-0x000007FEF51E0000-0x000007FEF5BCC000-memory.dmp
memory/2128-12-0x000007FEF51E0000-0x000007FEF5BCC000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-08-03 15:02
Reported
2024-08-03 15:03
Platform
win10v2004-20240802-en
Max time kernel
51s
Max time network
54s
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\windwsupdater.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\qqsarbuilder.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Roaming\SubDir\windwsupdater.exe | N/A |
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\SubDir\windwsupdater.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 1408 wrote to memory of 3420 | N/A | C:\Users\Admin\AppData\Local\Temp\qqsarbuilder.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 1408 wrote to memory of 3420 | N/A | C:\Users\Admin\AppData\Local\Temp\qqsarbuilder.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 1408 wrote to memory of 2604 | N/A | C:\Users\Admin\AppData\Local\Temp\qqsarbuilder.exe | C:\Users\Admin\AppData\Roaming\SubDir\windwsupdater.exe |
| PID 1408 wrote to memory of 2604 | N/A | C:\Users\Admin\AppData\Local\Temp\qqsarbuilder.exe | C:\Users\Admin\AppData\Roaming\SubDir\windwsupdater.exe |
| PID 2604 wrote to memory of 1792 | N/A | C:\Users\Admin\AppData\Roaming\SubDir\windwsupdater.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 2604 wrote to memory of 1792 | N/A | C:\Users\Admin\AppData\Roaming\SubDir\windwsupdater.exe | C:\Windows\SYSTEM32\schtasks.exe |
Uses Task Scheduler COM API
Processes
C:\Users\Admin\AppData\Local\Temp\qqsarbuilder.exe
"C:\Users\Admin\AppData\Local\Temp\qqsarbuilder.exe"
C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "windwsupdater" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\windwsupdater.exe" /rl HIGHEST /f
C:\Users\Admin\AppData\Roaming\SubDir\windwsupdater.exe
"C:\Users\Admin\AppData\Roaming\SubDir\windwsupdater.exe"
C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "windwsupdater" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\windwsupdater.exe" /rl HIGHEST /f
Network
| Country | Destination | Domain | Proto |
| N/A | 192.168.174.129:4782 | tcp | |
| US | 8.8.8.8:53 | 2.159.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 73.144.22.2.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 55.36.223.20.in-addr.arpa | udp |
| N/A | 192.168.174.129:4782 | tcp | |
| US | 8.8.8.8:53 | 183.59.114.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 198.187.3.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 99.58.20.217.in-addr.arpa | udp |
| N/A | 192.168.174.129:4782 | tcp |
Files
memory/1408-0-0x00007FFF5C3A3000-0x00007FFF5C3A5000-memory.dmp
memory/1408-1-0x00000000004A0000-0x00000000007C4000-memory.dmp
memory/1408-2-0x00007FFF5C3A0000-0x00007FFF5CE61000-memory.dmp
C:\Users\Admin\AppData\Roaming\SubDir\windwsupdater.exe
| MD5 | ea1ab6ce5932a3718821475f19feefea |
| SHA1 | 5ab97ce62532976abd93ed2cf56662b8ec15606c |
| SHA256 | 27f1a7bab299f2c36793116723e05be58c6edff36c07ba24a2703903cbdd6048 |
| SHA512 | e66fa91097b2f725503206bd7e92da486ffd17a9c8fab221387c1d3795e59afedae4fb791b9c530e2e25272a642964e63dc15fe081faed29289c332db8523838 |
memory/2604-10-0x00007FFF5C3A0000-0x00007FFF5CE61000-memory.dmp
memory/1408-9-0x00007FFF5C3A0000-0x00007FFF5CE61000-memory.dmp
memory/2604-11-0x00007FFF5C3A0000-0x00007FFF5CE61000-memory.dmp
memory/2604-12-0x000000001B3C0000-0x000000001B410000-memory.dmp
memory/2604-13-0x000000001D590000-0x000000001D642000-memory.dmp
memory/2604-14-0x00007FFF5C3A0000-0x00007FFF5CE61000-memory.dmp
memory/2604-15-0x00007FFF5C3A0000-0x00007FFF5CE61000-memory.dmp