Analysis Overview
SHA256
e30519495fc30aca7d914b0628fb21dd89f482856a9bbc70c62d2dbcf18d11b7
Threat Level: Known bad
The file Client-built.exe was found to be: Known bad.
Malicious Activity Summary
Quasar family
Quasar RAT
Quasar payload
Executes dropped EXE
Legitimate hosting services abused for malware hosting/C2
Unsigned PE
Enumerates physical storage devices
Suspicious use of SendNotifyMessage
Suspicious use of SetWindowsHookEx
Creates scheduled task(s)
Suspicious use of FindShellTrayWindow
Uses Task Scheduler COM API
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-04-07 17:38
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
2024-04-07 17:38
Reported
2024-04-07 17:41
Platform
win7-20240215-en
Max time kernel
148s
Max time network
150s
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 |
Legitimate hosting services abused for malware hosting/C2
| Description | Indicator | Process | Target |
| N/A | x.tcp.ngrok.io | N/A | N/A |
| N/A | x.tcp.ngrok.io | N/A | N/A |
| N/A | x.tcp.ngrok.io | N/A | N/A |
Enumerates physical storage devices
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-built.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe | N/A |
Suspicious use of FindShellTrayWindow
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe | N/A |
Suspicious use of SendNotifyMessage
| Description | Indicator | Process | Target |
| N/A | 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\Client-built.exe
"C:\Users\Admin\AppData\Local\Temp\Client-built.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 | x.tcp.ngrok.io | udp |
| DE | 3.125.223.134:16096 | x.tcp.ngrok.io | tcp |
| DE | 3.125.223.134:16096 | x.tcp.ngrok.io | tcp |
| DE | 3.125.223.134:16096 | x.tcp.ngrok.io | tcp |
| DE | 3.125.223.134:16096 | x.tcp.ngrok.io | tcp |
| DE | 3.125.223.134:16096 | x.tcp.ngrok.io | tcp |
| DE | 3.125.223.134:16096 | x.tcp.ngrok.io | tcp |
| DE | 3.125.223.134:16096 | x.tcp.ngrok.io | tcp |
| DE | 3.125.223.134:16096 | x.tcp.ngrok.io | tcp |
| DE | 3.125.223.134:16096 | x.tcp.ngrok.io | tcp |
| DE | 3.125.223.134:16096 | x.tcp.ngrok.io | tcp |
| DE | 3.125.223.134:16096 | x.tcp.ngrok.io | tcp |
| DE | 3.125.223.134:16096 | x.tcp.ngrok.io | tcp |
| DE | 3.125.223.134:16096 | x.tcp.ngrok.io | tcp |
| DE | 3.125.223.134:16096 | x.tcp.ngrok.io | tcp |
| DE | 3.125.223.134:16096 | x.tcp.ngrok.io | tcp |
| DE | 3.125.223.134:16096 | x.tcp.ngrok.io | tcp |
| DE | 3.125.223.134:16096 | x.tcp.ngrok.io | tcp |
| US | 8.8.8.8:53 | x.tcp.ngrok.io | udp |
| DE | 3.124.142.205:16096 | x.tcp.ngrok.io | tcp |
| DE | 3.124.142.205:16096 | x.tcp.ngrok.io | tcp |
| DE | 3.124.142.205:16096 | x.tcp.ngrok.io | tcp |
| DE | 3.124.142.205:16096 | x.tcp.ngrok.io | tcp |
| DE | 3.124.142.205:16096 | x.tcp.ngrok.io | tcp |
| DE | 3.124.142.205:16096 | x.tcp.ngrok.io | tcp |
| DE | 3.124.142.205:16096 | x.tcp.ngrok.io | tcp |
| DE | 3.124.142.205:16096 | x.tcp.ngrok.io | tcp |
| DE | 3.124.142.205:16096 | x.tcp.ngrok.io | tcp |
| DE | 3.124.142.205:16096 | x.tcp.ngrok.io | tcp |
| DE | 3.124.142.205:16096 | x.tcp.ngrok.io | tcp |
| DE | 3.124.142.205:16096 | x.tcp.ngrok.io | tcp |
| DE | 3.124.142.205:16096 | x.tcp.ngrok.io | tcp |
| DE | 3.124.142.205:16096 | x.tcp.ngrok.io | tcp |
| DE | 3.124.142.205:16096 | x.tcp.ngrok.io | tcp |
| DE | 3.124.142.205:16096 | x.tcp.ngrok.io | tcp |
| DE | 3.124.142.205:16096 | x.tcp.ngrok.io | tcp |
| US | 8.8.8.8:53 | x.tcp.ngrok.io | udp |
| DE | 18.158.249.75:16096 | x.tcp.ngrok.io | tcp |
| DE | 18.158.249.75:16096 | x.tcp.ngrok.io | tcp |
| DE | 18.158.249.75:16096 | x.tcp.ngrok.io | tcp |
| DE | 18.158.249.75:16096 | x.tcp.ngrok.io | tcp |
| DE | 18.158.249.75:16096 | x.tcp.ngrok.io | tcp |
| DE | 18.158.249.75:16096 | x.tcp.ngrok.io | tcp |
| DE | 18.158.249.75:16096 | x.tcp.ngrok.io | tcp |
Files
memory/2836-0-0x00000000003E0000-0x0000000000704000-memory.dmp
memory/2836-1-0x000007FEF5F40000-0x000007FEF692C000-memory.dmp
memory/2836-2-0x000000001B0A0000-0x000000001B120000-memory.dmp
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
| MD5 | 3169d3f34b2ce9d94a1bcb0e9ae48600 |
| SHA1 | ffec6c71b6c2213be5c4745807de1aedd6a90f20 |
| SHA256 | e30519495fc30aca7d914b0628fb21dd89f482856a9bbc70c62d2dbcf18d11b7 |
| SHA512 | 468f5db3cdf3a7a2870a6f78956f80b494520c2d8a589895794f4a5d7c7ea9feb262b7f5466933e8995eb2ddd8e92b72d7fe61f9afa4d89681e24840fc729860 |
memory/2836-7-0x000007FEF5F40000-0x000007FEF692C000-memory.dmp
memory/2940-8-0x00000000012E0000-0x0000000001604000-memory.dmp
memory/2940-9-0x000007FEF5F40000-0x000007FEF692C000-memory.dmp
memory/2940-10-0x000000001B270000-0x000000001B2F0000-memory.dmp
memory/2940-11-0x000007FEF5F40000-0x000007FEF692C000-memory.dmp
memory/2940-12-0x000000001B270000-0x000000001B2F0000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-04-07 17:38
Reported
2024-04-07 17:41
Platform
win10v2004-20240226-en
Max time kernel
146s
Max time network
150s
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 |
Legitimate hosting services abused for malware hosting/C2
| Description | Indicator | Process | Target |
| N/A | x.tcp.ngrok.io | N/A | N/A |
| N/A | x.tcp.ngrok.io | N/A | N/A |
| N/A | x.tcp.ngrok.io | N/A | N/A |
| N/A | x.tcp.ngrok.io | N/A | N/A |
Enumerates physical storage devices
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-built.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe | N/A |
Suspicious use of FindShellTrayWindow
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe | N/A |
Suspicious use of SendNotifyMessage
| Description | Indicator | Process | Target |
| N/A | 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 4168 wrote to memory of 3576 | N/A | C:\Users\Admin\AppData\Local\Temp\Client-built.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 4168 wrote to memory of 3576 | N/A | C:\Users\Admin\AppData\Local\Temp\Client-built.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 4168 wrote to memory of 4356 | N/A | C:\Users\Admin\AppData\Local\Temp\Client-built.exe | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe |
| PID 4168 wrote to memory of 4356 | N/A | C:\Users\Admin\AppData\Local\Temp\Client-built.exe | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe |
| PID 4356 wrote to memory of 3956 | N/A | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 4356 wrote to memory of 3956 | 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\Client-built.exe
"C:\Users\Admin\AppData\Local\Temp\Client-built.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 | 13.86.106.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 216.197.17.2.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 134.32.126.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | x.tcp.ngrok.io | udp |
| DE | 18.158.249.75:16096 | x.tcp.ngrok.io | tcp |
| US | 8.8.8.8:53 | 75.249.158.18.in-addr.arpa | udp |
| DE | 18.158.249.75:16096 | x.tcp.ngrok.io | tcp |
| DE | 18.158.249.75:16096 | x.tcp.ngrok.io | tcp |
| DE | 18.158.249.75:16096 | x.tcp.ngrok.io | tcp |
| DE | 18.158.249.75:16096 | x.tcp.ngrok.io | tcp |
| DE | 18.158.249.75:16096 | x.tcp.ngrok.io | tcp |
| US | 8.8.8.8:53 | 159.113.53.23.in-addr.arpa | udp |
| DE | 18.158.249.75:16096 | x.tcp.ngrok.io | tcp |
| DE | 18.158.249.75:16096 | x.tcp.ngrok.io | tcp |
| US | 8.8.8.8:53 | 183.59.114.20.in-addr.arpa | udp |
| DE | 18.158.249.75:16096 | x.tcp.ngrok.io | tcp |
| US | 8.8.8.8:53 | 15.164.165.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 43.56.20.217.in-addr.arpa | udp |
| DE | 18.158.249.75:16096 | x.tcp.ngrok.io | tcp |
| DE | 18.158.249.75:16096 | x.tcp.ngrok.io | tcp |
| DE | 18.158.249.75:16096 | x.tcp.ngrok.io | tcp |
| DE | 18.158.249.75:16096 | x.tcp.ngrok.io | tcp |
| DE | 18.158.249.75:16096 | x.tcp.ngrok.io | tcp |
| DE | 18.158.249.75:16096 | x.tcp.ngrok.io | tcp |
| DE | 18.158.249.75:16096 | x.tcp.ngrok.io | tcp |
| DE | 18.158.249.75:16096 | x.tcp.ngrok.io | tcp |
| US | 8.8.8.8:53 | 240.197.17.2.in-addr.arpa | udp |
| US | 8.8.8.8:53 | x.tcp.ngrok.io | udp |
| DE | 3.124.142.205:16096 | x.tcp.ngrok.io | tcp |
| US | 8.8.8.8:53 | 205.142.124.3.in-addr.arpa | udp |
| DE | 3.124.142.205:16096 | x.tcp.ngrok.io | tcp |
| DE | 3.124.142.205:16096 | x.tcp.ngrok.io | tcp |
| DE | 3.124.142.205:16096 | x.tcp.ngrok.io | tcp |
| DE | 3.124.142.205:16096 | x.tcp.ngrok.io | tcp |
| DE | 3.124.142.205:16096 | x.tcp.ngrok.io | tcp |
| DE | 3.124.142.205:16096 | x.tcp.ngrok.io | tcp |
| DE | 3.124.142.205:16096 | x.tcp.ngrok.io | tcp |
| US | 8.8.8.8:53 | 241.197.17.2.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 48.229.111.52.in-addr.arpa | udp |
| DE | 3.124.142.205:16096 | x.tcp.ngrok.io | tcp |
| DE | 3.124.142.205:16096 | x.tcp.ngrok.io | tcp |
| DE | 3.124.142.205:16096 | x.tcp.ngrok.io | tcp |
| DE | 3.124.142.205:16096 | x.tcp.ngrok.io | tcp |
| DE | 3.124.142.205:16096 | x.tcp.ngrok.io | tcp |
| DE | 3.124.142.205:16096 | x.tcp.ngrok.io | tcp |
| DE | 3.124.142.205:16096 | x.tcp.ngrok.io | tcp |
| DE | 3.124.142.205:16096 | x.tcp.ngrok.io | tcp |
| US | 8.8.8.8:53 | x.tcp.ngrok.io | udp |
| DE | 18.158.249.75:16096 | x.tcp.ngrok.io | tcp |
| DE | 18.158.249.75:16096 | x.tcp.ngrok.io | tcp |
| DE | 18.158.249.75:16096 | x.tcp.ngrok.io | tcp |
| DE | 18.158.249.75:16096 | x.tcp.ngrok.io | tcp |
| US | 8.8.8.8:53 | x.tcp.ngrok.io | udp |
| DE | 3.125.209.94:16096 | x.tcp.ngrok.io | tcp |
| US | 8.8.8.8:53 | 94.209.125.3.in-addr.arpa | udp |
| DE | 3.125.209.94:16096 | x.tcp.ngrok.io | tcp |
| DE | 3.125.209.94:16096 | x.tcp.ngrok.io | tcp |
Files
memory/4168-0-0x0000000000390000-0x00000000006B4000-memory.dmp
memory/4168-1-0x00007FFF27130000-0x00007FFF27BF1000-memory.dmp
memory/4168-2-0x0000000002740000-0x0000000002750000-memory.dmp
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
| MD5 | 3169d3f34b2ce9d94a1bcb0e9ae48600 |
| SHA1 | ffec6c71b6c2213be5c4745807de1aedd6a90f20 |
| SHA256 | e30519495fc30aca7d914b0628fb21dd89f482856a9bbc70c62d2dbcf18d11b7 |
| SHA512 | 468f5db3cdf3a7a2870a6f78956f80b494520c2d8a589895794f4a5d7c7ea9feb262b7f5466933e8995eb2ddd8e92b72d7fe61f9afa4d89681e24840fc729860 |
memory/4168-9-0x00007FFF27130000-0x00007FFF27BF1000-memory.dmp
memory/4356-8-0x00007FFF27130000-0x00007FFF27BF1000-memory.dmp
memory/4356-10-0x00000000030F0000-0x0000000003100000-memory.dmp
memory/4356-11-0x000000001C920000-0x000000001C970000-memory.dmp
memory/4356-12-0x000000001CA30000-0x000000001CAE2000-memory.dmp
memory/4356-13-0x00007FFF27130000-0x00007FFF27BF1000-memory.dmp
memory/4356-14-0x00000000030F0000-0x0000000003100000-memory.dmp