Analysis Overview
SHA256
6be1cae3cc032014e34c3a79e24aafd051639b807db79ea56d493d9203c2ac89
Threat Level: Known bad
The file rezprivwoofer.7z was found to be: Known bad.
Malicious Activity Summary
Quasar family
Quasar RAT
Quasar payload
Executes dropped EXE
Unsigned PE
Suspicious use of AdjustPrivilegeToken
Uses Task Scheduler COM API
Scheduled Task/Job: Scheduled Task
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-10-30 11:53
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
2024-10-30 11:53
Reported
2024-10-30 11:56
Platform
win7-20240903-en
Max time kernel
127s
Max time network
138s
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 |
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\rezprivwoofer\TempWoofpriv.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\rezprivwoofer\TempWoofpriv.exe
"C:\Users\Admin\AppData\Local\Temp\rezprivwoofer\TempWoofpriv.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 | 192.168.1.28:4782 | tcp | |
| N/A | 192.168.1.28:4782 | tcp | |
| N/A | 192.168.1.28:4782 | tcp | |
| N/A | 192.168.1.28:4782 | tcp | |
| N/A | 192.168.1.28:4782 | tcp | |
| N/A | 192.168.1.28:4782 | tcp |
Files
memory/2260-0-0x000007FEF6163000-0x000007FEF6164000-memory.dmp
memory/2260-1-0x0000000000B10000-0x0000000000E34000-memory.dmp
memory/2260-2-0x000007FEF6160000-0x000007FEF6B4C000-memory.dmp
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
| MD5 | b9aee7a92f002f80a6b04c252b05bb29 |
| SHA1 | 4e186ba6d401d5e45627ac789d3cf22d19698b8c |
| SHA256 | 72f27c509e27de2edbe9d98fa9258624260d3cabd7b9932636dceb610180d7ef |
| SHA512 | b3f899e279c6f72cb8517160b747bcd44339909b61a82e4304d1e29e9e5da9506acdde8531d25ed3a3506781743c74427437dcfc6981bc992fdb5d83652cb6cd |
memory/2852-9-0x000007FEF6160000-0x000007FEF6B4C000-memory.dmp
memory/2852-8-0x0000000000380000-0x00000000006A4000-memory.dmp
memory/2260-7-0x000007FEF6160000-0x000007FEF6B4C000-memory.dmp
memory/2852-10-0x000007FEF6160000-0x000007FEF6B4C000-memory.dmp
memory/2852-11-0x000007FEF6160000-0x000007FEF6B4C000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-10-30 11:53
Reported
2024-10-30 11:54
Platform
win10v2004-20241007-en
Max time kernel
26s
Max time network
23s
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 |
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\rezprivwoofer\TempWoofpriv.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 1060 wrote to memory of 1392 | N/A | C:\Users\Admin\AppData\Local\Temp\rezprivwoofer\TempWoofpriv.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 1060 wrote to memory of 1392 | N/A | C:\Users\Admin\AppData\Local\Temp\rezprivwoofer\TempWoofpriv.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 1060 wrote to memory of 1868 | N/A | C:\Users\Admin\AppData\Local\Temp\rezprivwoofer\TempWoofpriv.exe | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe |
| PID 1060 wrote to memory of 1868 | N/A | C:\Users\Admin\AppData\Local\Temp\rezprivwoofer\TempWoofpriv.exe | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe |
| PID 1868 wrote to memory of 448 | N/A | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 1868 wrote to memory of 448 | 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\rezprivwoofer\TempWoofpriv.exe
"C:\Users\Admin\AppData\Local\Temp\rezprivwoofer\TempWoofpriv.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 | 97.17.167.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 140.32.126.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 88.156.103.20.in-addr.arpa | udp |
| N/A | 192.168.1.28:4782 | tcp | |
| US | 8.8.8.8:53 | 232.168.11.51.in-addr.arpa | udp |
Files
memory/1060-0-0x00007FFFFDBF3000-0x00007FFFFDBF5000-memory.dmp
memory/1060-1-0x0000000000130000-0x0000000000454000-memory.dmp
memory/1060-2-0x00007FFFFDBF0000-0x00007FFFFE6B1000-memory.dmp
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
| MD5 | b9aee7a92f002f80a6b04c252b05bb29 |
| SHA1 | 4e186ba6d401d5e45627ac789d3cf22d19698b8c |
| SHA256 | 72f27c509e27de2edbe9d98fa9258624260d3cabd7b9932636dceb610180d7ef |
| SHA512 | b3f899e279c6f72cb8517160b747bcd44339909b61a82e4304d1e29e9e5da9506acdde8531d25ed3a3506781743c74427437dcfc6981bc992fdb5d83652cb6cd |
memory/1060-8-0x00007FFFFDBF0000-0x00007FFFFE6B1000-memory.dmp
memory/1868-9-0x00007FFFFDBF0000-0x00007FFFFE6B1000-memory.dmp
memory/1868-10-0x00007FFFFDBF0000-0x00007FFFFE6B1000-memory.dmp
memory/1868-11-0x000000001BC30000-0x000000001BC80000-memory.dmp
memory/1868-12-0x000000001C470000-0x000000001C522000-memory.dmp
memory/1868-13-0x00007FFFFDBF0000-0x00007FFFFE6B1000-memory.dmp