Analysis Overview
SHA256
76ba8ec8222df3a96263d57d284c0acd8f62a604e2a46e86e8a5b46d6018607c
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
Unsigned PE
Uses Task Scheduler COM API
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Scheduled Task/Job: Scheduled Task
Suspicious use of AdjustPrivilegeToken
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-07-31 23:53
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
2024-07-31 23:53
Reported
2024-07-31 23:55
Platform
win7-20240729-en
Max time kernel
149s
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\BootstrapperV1.11.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\Client-built.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Roaming\SubDir\BootstrapperV1.11.exe | N/A |
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\SubDir\BootstrapperV1.11.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 "BootstrapperV1.11" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\BootstrapperV1.11.exe" /rl HIGHEST /f
C:\Users\Admin\AppData\Roaming\SubDir\BootstrapperV1.11.exe
"C:\Users\Admin\AppData\Roaming\SubDir\BootstrapperV1.11.exe"
C:\Windows\system32\schtasks.exe
"schtasks" /create /tn "BootstrapperV1.11" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\BootstrapperV1.11.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 | |
| N/A | 192.168.1.28:4782 | tcp |
Files
memory/2336-0-0x000007FEF6063000-0x000007FEF6064000-memory.dmp
memory/2336-1-0x00000000002A0000-0x00000000005C4000-memory.dmp
memory/2336-2-0x000007FEF6060000-0x000007FEF6A4C000-memory.dmp
C:\Users\Admin\AppData\Roaming\SubDir\BootstrapperV1.11.exe
| MD5 | b45a77a2cdaca1dbaf0ebeec34178a95 |
| SHA1 | 4b43a29635df7b060ec3c7696c45446bf37c8150 |
| SHA256 | 76ba8ec8222df3a96263d57d284c0acd8f62a604e2a46e86e8a5b46d6018607c |
| SHA512 | cdfbe90b1ad02b69a5bfcb577d1cd8c12d055df2e370716d0faccf65364edecf5c8103f55355daa11a8d845a24d453b78c6e49f06242043ffa1a0a9d8e7d052d |
memory/3056-10-0x000007FEF6060000-0x000007FEF6A4C000-memory.dmp
memory/3056-9-0x000007FEF6060000-0x000007FEF6A4C000-memory.dmp
memory/2336-8-0x000007FEF6060000-0x000007FEF6A4C000-memory.dmp
memory/3056-7-0x0000000000110000-0x0000000000434000-memory.dmp
memory/3056-11-0x000007FEF6060000-0x000007FEF6A4C000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-07-31 23:53
Reported
2024-07-31 23:55
Platform
win10v2004-20240730-en
Max time kernel
126s
Max time network
143s
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\BootstrapperV1.11.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\Client-built.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Roaming\SubDir\BootstrapperV1.11.exe | N/A |
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\SubDir\BootstrapperV1.11.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 3412 wrote to memory of 1812 | N/A | C:\Users\Admin\AppData\Local\Temp\Client-built.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 3412 wrote to memory of 1812 | N/A | C:\Users\Admin\AppData\Local\Temp\Client-built.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 3412 wrote to memory of 2112 | N/A | C:\Users\Admin\AppData\Local\Temp\Client-built.exe | C:\Users\Admin\AppData\Roaming\SubDir\BootstrapperV1.11.exe |
| PID 3412 wrote to memory of 2112 | N/A | C:\Users\Admin\AppData\Local\Temp\Client-built.exe | C:\Users\Admin\AppData\Roaming\SubDir\BootstrapperV1.11.exe |
| PID 2112 wrote to memory of 4724 | N/A | C:\Users\Admin\AppData\Roaming\SubDir\BootstrapperV1.11.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 2112 wrote to memory of 4724 | N/A | C:\Users\Admin\AppData\Roaming\SubDir\BootstrapperV1.11.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 "BootstrapperV1.11" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\BootstrapperV1.11.exe" /rl HIGHEST /f
C:\Users\Admin\AppData\Roaming\SubDir\BootstrapperV1.11.exe
"C:\Users\Admin\AppData\Roaming\SubDir\BootstrapperV1.11.exe"
C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "BootstrapperV1.11" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\BootstrapperV1.11.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 | 20.160.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 172.214.232.199.in-addr.arpa | udp |
| US | 8.8.8.8:53 | g.bing.com | udp |
| US | 204.79.197.237:443 | g.bing.com | tcp |
| US | 8.8.8.8:53 | 55.36.223.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 237.197.79.204.in-addr.arpa | udp |
| N/A | 192.168.1.28:4782 | tcp | |
| N/A | 192.168.1.28:4782 | tcp | |
| US | 8.8.8.8:53 | 26.165.165.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 198.187.3.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 147.142.123.92.in-addr.arpa | udp |
| N/A | 192.168.1.28:4782 | tcp | |
| N/A | 192.168.1.28:4782 | tcp | |
| US | 8.8.8.8:53 | 14.227.111.52.in-addr.arpa | udp |
| N/A | 192.168.1.28:4782 | tcp | |
| N/A | 192.168.1.28:4782 | tcp |
Files
memory/3412-0-0x00007FFA02D43000-0x00007FFA02D45000-memory.dmp
memory/3412-1-0x0000000000EA0000-0x00000000011C4000-memory.dmp
memory/3412-2-0x00007FFA02D40000-0x00007FFA03801000-memory.dmp
C:\Users\Admin\AppData\Roaming\SubDir\BootstrapperV1.11.exe
| MD5 | b45a77a2cdaca1dbaf0ebeec34178a95 |
| SHA1 | 4b43a29635df7b060ec3c7696c45446bf37c8150 |
| SHA256 | 76ba8ec8222df3a96263d57d284c0acd8f62a604e2a46e86e8a5b46d6018607c |
| SHA512 | cdfbe90b1ad02b69a5bfcb577d1cd8c12d055df2e370716d0faccf65364edecf5c8103f55355daa11a8d845a24d453b78c6e49f06242043ffa1a0a9d8e7d052d |
memory/2112-8-0x00007FFA02D40000-0x00007FFA03801000-memory.dmp
memory/3412-9-0x00007FFA02D40000-0x00007FFA03801000-memory.dmp
memory/2112-10-0x00007FFA02D40000-0x00007FFA03801000-memory.dmp
memory/2112-11-0x000000001BBC0000-0x000000001BC10000-memory.dmp
memory/2112-12-0x000000001BCD0000-0x000000001BD82000-memory.dmp
memory/2112-13-0x00007FFA02D40000-0x00007FFA03801000-memory.dmp