Analysis Overview
SHA256
fdba9e9d51c62d59de744a179a50ce9f5838af549f30f5b87c8175dace024fee
Threat Level: Known bad
The file Client-built.exe was found to be: Known bad.
Malicious Activity Summary
Quasar RAT
Quasar family
Quasar payload
Executes dropped EXE
Drops file in System32 directory
Enumerates physical storage devices
Unsigned PE
Scheduled Task/Job: Scheduled Task
Suspicious use of AdjustPrivilegeToken
Suspicious use of SendNotifyMessage
Suspicious use of FindShellTrayWindow
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Uses Task Scheduler COM API
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-12-13 10:00
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: behavioral2
Detonation Overview
Submitted
2024-12-13 10:00
Reported
2024-12-13 10:02
Platform
win10v2004-20241007-en
Max time kernel
126s
Max time network
150s
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:\Windows\system32\SubDir\Client.exe | N/A |
Drops file in System32 directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\system32\SubDir\Client.exe | C:\Users\Admin\AppData\Local\Temp\Client-built.exe | N/A |
| File opened for modification | C:\Windows\system32\SubDir\Client.exe | C:\Users\Admin\AppData\Local\Temp\Client-built.exe | N/A |
Enumerates physical storage devices
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\Client-built.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\system32\SubDir\Client.exe | N/A |
Suspicious use of FindShellTrayWindow
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system32\SubDir\Client.exe | N/A |
Suspicious use of SendNotifyMessage
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system32\SubDir\Client.exe | N/A |
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system32\SubDir\Client.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 1316 wrote to memory of 64 | N/A | C:\Users\Admin\AppData\Local\Temp\Client-built.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 1316 wrote to memory of 64 | N/A | C:\Users\Admin\AppData\Local\Temp\Client-built.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 1316 wrote to memory of 3468 | N/A | C:\Users\Admin\AppData\Local\Temp\Client-built.exe | C:\Windows\system32\SubDir\Client.exe |
| PID 1316 wrote to memory of 3468 | N/A | C:\Users\Admin\AppData\Local\Temp\Client-built.exe | C:\Windows\system32\SubDir\Client.exe |
| PID 3468 wrote to memory of 3996 | N/A | C:\Windows\system32\SubDir\Client.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 3468 wrote to memory of 3996 | N/A | C:\Windows\system32\SubDir\Client.exe | C:\Windows\SYSTEM32\schtasks.exe |
Uses Task Scheduler COM API
Processes
C:\Users\Admin\AppData\Local\Temp\Client-built.exe
"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "java updater" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\Client-built.exe" /rl HIGHEST /f
C:\Windows\system32\SubDir\Client.exe
"C:\Windows\system32\SubDir\Client.exe"
C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "java updater" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Client.exe" /rl HIGHEST /f
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 8.8.8.8.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 104.219.191.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 172.214.232.199.in-addr.arpa | udp |
| US | 69.160.242.105:4782 | tcp | |
| US | 8.8.8.8:53 | 58.55.71.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 95.221.229.192.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 64.159.190.20.in-addr.arpa | udp |
| US | 69.160.242.105:11066 | tcp | |
| US | 8.8.8.8:53 | 53.210.109.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 18.31.95.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 172.210.232.199.in-addr.arpa | udp |
| US | 69.160.242.105:4782 | tcp | |
| US | 8.8.8.8:53 | 133.130.81.91.in-addr.arpa | udp |
| US | 69.160.242.105:11066 | tcp | |
| US | 69.160.242.105:4782 | tcp | |
| US | 69.160.242.105:11066 | tcp |
Files
memory/1316-0-0x00007FFC72ED3000-0x00007FFC72ED5000-memory.dmp
memory/1316-1-0x0000000000F10000-0x0000000000F94000-memory.dmp
memory/1316-2-0x00007FFC72ED0000-0x00007FFC73991000-memory.dmp
C:\Windows\System32\SubDir\Client.exe
| MD5 | 05aa0a6d16f1dabf72b4c880a5d357d0 |
| SHA1 | 4a3ebaa010ba5306cd09c07eb26bbe99ff46496f |
| SHA256 | fdba9e9d51c62d59de744a179a50ce9f5838af549f30f5b87c8175dace024fee |
| SHA512 | 931a147bf27a8a14db99b8f6480dddfa2bd1e0b4aaa59092552ef93e9f93adddbcb71d7d9c7a1f45f7854e32d16555dc7f3be701a2df9578a9e99349e972758a |
memory/3468-8-0x00007FFC72ED0000-0x00007FFC73991000-memory.dmp
memory/1316-10-0x00007FFC72ED0000-0x00007FFC73991000-memory.dmp
memory/3468-9-0x00007FFC72ED0000-0x00007FFC73991000-memory.dmp
memory/3468-11-0x000000001BCA0000-0x000000001BCF0000-memory.dmp
memory/3468-12-0x000000001BDB0000-0x000000001BE62000-memory.dmp
memory/3468-13-0x00007FFC72ED0000-0x00007FFC73991000-memory.dmp
Analysis: behavioral1
Detonation Overview
Submitted
2024-12-13 10:00
Reported
2024-12-13 10:02
Platform
win7-20240903-en
Max time kernel
126s
Max time network
135s
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:\Windows\system32\SubDir\Client.exe | N/A |
Drops file in System32 directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\system32\SubDir\Client.exe | C:\Users\Admin\AppData\Local\Temp\Client-built.exe | N/A |
| File opened for modification | C:\Windows\system32\SubDir\Client.exe | C:\Users\Admin\AppData\Local\Temp\Client-built.exe | N/A |
Enumerates physical storage devices
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\Client-built.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\system32\SubDir\Client.exe | N/A |
Suspicious use of FindShellTrayWindow
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system32\SubDir\Client.exe | N/A |
Suspicious use of SendNotifyMessage
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system32\SubDir\Client.exe | N/A |
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system32\SubDir\Client.exe | N/A |
Suspicious use of WriteProcessMemory
Uses Task Scheduler COM API
Processes
C:\Users\Admin\AppData\Local\Temp\Client-built.exe
"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
C:\Windows\system32\schtasks.exe
"schtasks" /create /tn "java updater" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\Client-built.exe" /rl HIGHEST /f
C:\Windows\system32\SubDir\Client.exe
"C:\Windows\system32\SubDir\Client.exe"
C:\Windows\system32\schtasks.exe
"schtasks" /create /tn "java updater" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Client.exe" /rl HIGHEST /f
Network
| Country | Destination | Domain | Proto |
| US | 69.160.242.105:4782 | tcp | |
| US | 69.160.242.105:11066 | tcp | |
| US | 69.160.242.105:4782 | tcp | |
| US | 69.160.242.105:11066 | tcp | |
| US | 69.160.242.105:4782 | tcp | |
| US | 69.160.242.105:11066 | tcp |
Files
memory/2104-0-0x000007FEF5A23000-0x000007FEF5A24000-memory.dmp
memory/2104-1-0x0000000000EC0000-0x0000000000F44000-memory.dmp
memory/2104-2-0x000007FEF5A20000-0x000007FEF640C000-memory.dmp
C:\Windows\System32\SubDir\Client.exe
| MD5 | 05aa0a6d16f1dabf72b4c880a5d357d0 |
| SHA1 | 4a3ebaa010ba5306cd09c07eb26bbe99ff46496f |
| SHA256 | fdba9e9d51c62d59de744a179a50ce9f5838af549f30f5b87c8175dace024fee |
| SHA512 | 931a147bf27a8a14db99b8f6480dddfa2bd1e0b4aaa59092552ef93e9f93adddbcb71d7d9c7a1f45f7854e32d16555dc7f3be701a2df9578a9e99349e972758a |
memory/2648-8-0x000007FEF5A20000-0x000007FEF640C000-memory.dmp
memory/2648-7-0x0000000000CD0000-0x0000000000D54000-memory.dmp
memory/2648-9-0x000007FEF5A20000-0x000007FEF640C000-memory.dmp
memory/2104-10-0x000007FEF5A20000-0x000007FEF640C000-memory.dmp
memory/2648-11-0x000007FEF5A20000-0x000007FEF640C000-memory.dmp
memory/2648-12-0x000007FEF5A20000-0x000007FEF640C000-memory.dmp