Analysis Overview
SHA256
ea3003e00c6e653fad8844d4677ceef7b7b6e499939ed765a49df3898ddf3c45
Threat Level: Known bad
The file Client-built.exe was found to be: Known bad.
Malicious Activity Summary
Quasar payload
Quasar family
Quasar RAT
Executes dropped EXE
Legitimate hosting services abused for malware hosting/C2
Enumerates physical storage devices
Unsigned PE
Uses Task Scheduler COM API
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Suspicious use of SendNotifyMessage
Creates scheduled task(s)
Suspicious use of SetWindowsHookEx
Suspicious use of FindShellTrayWindow
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-04-07 17:39
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 17:39
Reported
2024-04-07 17:42
Platform
win7-20240221-en
Max time kernel
150s
Max time network
155s
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 | 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 |
| 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 |
| DE | 18.158.249.75:16096 | 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 |
| 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 | 3.125.223.134:16096 | 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 |
Files
memory/2180-0-0x0000000001340000-0x0000000001664000-memory.dmp
memory/2180-1-0x000007FEF5690000-0x000007FEF607C000-memory.dmp
memory/2180-2-0x000000001B010000-0x000000001B090000-memory.dmp
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
| MD5 | 2aebe66b019df4695fe7218875c93856 |
| SHA1 | 646890986ef0bba4eed6b659d56704d09e414562 |
| SHA256 | ea3003e00c6e653fad8844d4677ceef7b7b6e499939ed765a49df3898ddf3c45 |
| SHA512 | 7391db69d5cc021dee50b2af12d11b30a4225f46b4469d10eff4e659c71c298233dea01e1e626d35d49b9490ef3dcaa1570b4448859d9d04ac0270b71c84bddc |
memory/3040-7-0x000007FEF5690000-0x000007FEF607C000-memory.dmp
memory/3040-9-0x0000000001010000-0x0000000001334000-memory.dmp
memory/2180-8-0x000007FEF5690000-0x000007FEF607C000-memory.dmp
memory/3040-10-0x000000001B5B0000-0x000000001B630000-memory.dmp
memory/3040-11-0x000007FEF5690000-0x000007FEF607C000-memory.dmp
memory/3040-12-0x000000001B5B0000-0x000000001B630000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-04-07 17:39
Reported
2024-04-07 17:42
Platform
win10v2004-20231215-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 |
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 3572 wrote to memory of 2076 | N/A | C:\Users\Admin\AppData\Local\Temp\Client-built.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 3572 wrote to memory of 2076 | N/A | C:\Users\Admin\AppData\Local\Temp\Client-built.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 3572 wrote to memory of 2912 | N/A | C:\Users\Admin\AppData\Local\Temp\Client-built.exe | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe |
| PID 3572 wrote to memory of 2912 | N/A | C:\Users\Admin\AppData\Local\Temp\Client-built.exe | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe |
| PID 2912 wrote to memory of 3956 | N/A | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 2912 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 | 241.150.49.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 241.197.17.2.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 14.160.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 95.221.229.192.in-addr.arpa | udp |
| US | 8.8.8.8:53 | x.tcp.ngrok.io | udp |
| DE | 3.125.223.134:16096 | x.tcp.ngrok.io | tcp |
| US | 8.8.8.8:53 | 134.223.125.3.in-addr.arpa | 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 |
| NL | 52.142.223.178:80 | tcp | |
| US | 8.8.8.8:53 | 209.205.72.20.in-addr.arpa | 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 |
| US | 8.8.8.8:53 | 26.165.165.52.in-addr.arpa | udp |
| DE | 3.125.223.134:16096 | 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 | 17.143.109.104.in-addr.arpa | 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 |
| 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 | 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 |
| 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 |
| US | 8.8.8.8:53 | 13.227.111.52.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 | 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 |
Files
memory/3572-0-0x0000000000B40000-0x0000000000E64000-memory.dmp
memory/3572-1-0x00007FFF0ADE0000-0x00007FFF0B8A1000-memory.dmp
memory/3572-2-0x000000001BC70000-0x000000001BC80000-memory.dmp
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
| MD5 | 2aebe66b019df4695fe7218875c93856 |
| SHA1 | 646890986ef0bba4eed6b659d56704d09e414562 |
| SHA256 | ea3003e00c6e653fad8844d4677ceef7b7b6e499939ed765a49df3898ddf3c45 |
| SHA512 | 7391db69d5cc021dee50b2af12d11b30a4225f46b4469d10eff4e659c71c298233dea01e1e626d35d49b9490ef3dcaa1570b4448859d9d04ac0270b71c84bddc |
memory/3572-8-0x00007FFF0ADE0000-0x00007FFF0B8A1000-memory.dmp
memory/2912-10-0x000000001B790000-0x000000001B7A0000-memory.dmp
memory/2912-9-0x00007FFF0ADE0000-0x00007FFF0B8A1000-memory.dmp
memory/2912-11-0x000000001C610000-0x000000001C660000-memory.dmp
memory/2912-12-0x000000001C720000-0x000000001C7D2000-memory.dmp
memory/2912-13-0x00007FFF0ADE0000-0x00007FFF0B8A1000-memory.dmp
memory/2912-14-0x000000001B790000-0x000000001B7A0000-memory.dmp