Analysis Overview
SHA256
d00477c11f3c8ad73a0ea9c3c4b7e549754ed63b645a3a8f57de6dd2f89ec8d0
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
Unsigned PE
Suspicious use of FindShellTrayWindow
Scheduled Task/Job: Scheduled Task
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Uses Task Scheduler COM API
Suspicious use of SendNotifyMessage
Suspicious use of AdjustPrivilegeToken
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-08-18 21:22
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
2024-08-18 21:22
Reported
2024-08-18 21:25
Platform
win7-20240705-en
Max time kernel
128s
Max time network
141s
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:\Windows\system32\Windows\Windows Host Process.exe | N/A |
Drops file in System32 directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\system32\Windows\Windows Host Process.exe | C:\Users\Admin\AppData\Local\Temp\Client-built.exe | N/A |
| File opened for modification | C:\Windows\system32\Windows\Windows Host Process.exe | C:\Users\Admin\AppData\Local\Temp\Client-built.exe | N/A |
| File opened for modification | C:\Windows\system32\Windows | C:\Users\Admin\AppData\Local\Temp\Client-built.exe | N/A |
| File opened for modification | C:\Windows\system32\Windows\Windows Host Process.exe | C:\Windows\system32\Windows\Windows Host Process.exe | N/A |
| File opened for modification | C:\Windows\system32\Windows | C:\Windows\system32\Windows\Windows Host Process.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:\Windows\system32\Windows\Windows Host Process.exe | N/A |
Suspicious use of FindShellTrayWindow
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system32\Windows\Windows Host Process.exe | N/A |
Suspicious use of SendNotifyMessage
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system32\Windows\Windows Host Process.exe | N/A |
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system32\Windows\Windows Host Process.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 "Windows Host Process" /sc ONLOGON /tr "C:\Windows\system32\Windows\Windows Host Process.exe" /rl HIGHEST /f
C:\Windows\system32\Windows\Windows Host Process.exe
"C:\Windows\system32\Windows\Windows Host Process.exe"
C:\Windows\system32\schtasks.exe
"schtasks" /create /tn "Windows Host Process" /sc ONLOGON /tr "C:\Windows\system32\Windows\Windows Host Process.exe" /rl HIGHEST /f
Network
| Country | Destination | Domain | Proto |
| US | 147.185.221.22:6712 | tcp | |
| US | 147.185.221.22:6712 | tcp | |
| US | 147.185.221.22:6712 | tcp | |
| US | 147.185.221.22:6712 | tcp | |
| US | 147.185.221.22:6712 | tcp | |
| US | 147.185.221.22:6712 | tcp | |
| US | 147.185.221.22:6712 | tcp | |
| US | 147.185.221.22:6712 | tcp | |
| US | 147.185.221.22:6712 | tcp | |
| US | 147.185.221.22:6712 | tcp | |
| US | 147.185.221.22:6712 | tcp | |
| US | 147.185.221.22:6712 | tcp | |
| US | 147.185.221.22:6712 | tcp | |
| US | 147.185.221.22:6712 | tcp | |
| US | 147.185.221.22:6712 | tcp | |
| US | 147.185.221.22:6712 | tcp | |
| US | 147.185.221.22:6712 | tcp | |
| US | 147.185.221.22:6712 | tcp | |
| US | 147.185.221.22:6712 | tcp | |
| US | 147.185.221.22:6712 | tcp | |
| US | 147.185.221.22:6712 | tcp | |
| US | 147.185.221.22:6712 | tcp | |
| US | 147.185.221.22:6712 | tcp | |
| US | 147.185.221.22:6712 | tcp | |
| US | 147.185.221.22:6712 | tcp | |
| US | 147.185.221.22:6712 | tcp | |
| US | 147.185.221.22:6712 | tcp | |
| US | 147.185.221.22:6712 | tcp | |
| US | 147.185.221.22:6712 | tcp | |
| US | 147.185.221.22:6712 | tcp | |
| US | 147.185.221.22:6712 | tcp | |
| US | 147.185.221.22:6712 | tcp |
Files
memory/3016-0-0x000007FEF4E23000-0x000007FEF4E24000-memory.dmp
memory/3016-1-0x00000000013D0000-0x0000000001728000-memory.dmp
memory/3016-2-0x000007FEF4E20000-0x000007FEF580C000-memory.dmp
C:\Windows\System32\Windows\Windows Host Process.exe
| MD5 | 9eb8732b560208f0380c386771aba096 |
| SHA1 | d2ae1ff6755e79f97485aea27912ed7710378b08 |
| SHA256 | d00477c11f3c8ad73a0ea9c3c4b7e549754ed63b645a3a8f57de6dd2f89ec8d0 |
| SHA512 | 686b1968a19d6f81562df6efd659060ecc7d2eceb7b053d530e8bcba030db6e7b55cb7c6364d6dddc7ea9a46b5004cae3a78db5b432ed279ce2fa854fa400b8a |
memory/2800-10-0x0000000000350000-0x00000000006A8000-memory.dmp
memory/2800-9-0x000007FEF4E20000-0x000007FEF580C000-memory.dmp
memory/3016-8-0x000007FEF4E20000-0x000007FEF580C000-memory.dmp
memory/2800-11-0x000007FEF4E20000-0x000007FEF580C000-memory.dmp
memory/2800-12-0x000007FEF4E20000-0x000007FEF580C000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-08-18 21:22
Reported
2024-08-18 21:25
Platform
win10v2004-20240802-en
Max time kernel
147s
Max time network
151s
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:\Windows\system32\Windows\Windows Host Process.exe | N/A |
Drops file in System32 directory
| Description | Indicator | Process | Target |
| File opened for modification | C:\Windows\system32\Windows\Windows Host Process.exe | C:\Users\Admin\AppData\Local\Temp\Client-built.exe | N/A |
| File opened for modification | C:\Windows\system32\Windows | C:\Users\Admin\AppData\Local\Temp\Client-built.exe | N/A |
| File opened for modification | C:\Windows\system32\Windows\Windows Host Process.exe | C:\Windows\system32\Windows\Windows Host Process.exe | N/A |
| File opened for modification | C:\Windows\system32\Windows | C:\Windows\system32\Windows\Windows Host Process.exe | N/A |
| File created | C:\Windows\system32\Windows\Windows Host Process.exe | C:\Users\Admin\AppData\Local\Temp\Client-built.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:\Windows\system32\Windows\Windows Host Process.exe | N/A |
Suspicious use of FindShellTrayWindow
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system32\Windows\Windows Host Process.exe | N/A |
| N/A | N/A | C:\Windows\system32\Windows\Windows Host Process.exe | N/A |
| N/A | N/A | C:\Windows\system32\Windows\Windows Host Process.exe | N/A |
| N/A | N/A | C:\Windows\system32\Windows\Windows Host Process.exe | N/A |
| N/A | N/A | C:\Windows\system32\Windows\Windows Host Process.exe | N/A |
| N/A | N/A | C:\Windows\system32\Windows\Windows Host Process.exe | N/A |
Suspicious use of SendNotifyMessage
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system32\Windows\Windows Host Process.exe | N/A |
| N/A | N/A | C:\Windows\system32\Windows\Windows Host Process.exe | N/A |
| N/A | N/A | C:\Windows\system32\Windows\Windows Host Process.exe | N/A |
| N/A | N/A | C:\Windows\system32\Windows\Windows Host Process.exe | N/A |
| N/A | N/A | C:\Windows\system32\Windows\Windows Host Process.exe | N/A |
| N/A | N/A | C:\Windows\system32\Windows\Windows Host Process.exe | N/A |
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system32\Windows\Windows Host Process.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 2932 wrote to memory of 1552 | N/A | C:\Users\Admin\AppData\Local\Temp\Client-built.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 2932 wrote to memory of 1552 | N/A | C:\Users\Admin\AppData\Local\Temp\Client-built.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 2932 wrote to memory of 3008 | N/A | C:\Users\Admin\AppData\Local\Temp\Client-built.exe | C:\Windows\system32\Windows\Windows Host Process.exe |
| PID 2932 wrote to memory of 3008 | N/A | C:\Users\Admin\AppData\Local\Temp\Client-built.exe | C:\Windows\system32\Windows\Windows Host Process.exe |
| PID 3008 wrote to memory of 2896 | N/A | C:\Windows\system32\Windows\Windows Host Process.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 3008 wrote to memory of 2896 | N/A | C:\Windows\system32\Windows\Windows Host Process.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 "Windows Host Process" /sc ONLOGON /tr "C:\Windows\system32\Windows\Windows Host Process.exe" /rl HIGHEST /f
C:\Windows\system32\Windows\Windows Host Process.exe
"C:\Windows\system32\Windows\Windows Host Process.exe"
C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "Windows Host Process" /sc ONLOGON /tr "C:\Windows\system32\Windows\Windows Host Process.exe" /rl HIGHEST /f
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 28.118.140.52.in-addr.arpa | udp |
| US | 147.185.221.22:6712 | tcp | |
| US | 8.8.8.8:53 | 75.159.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | ipwho.is | udp |
| US | 8.8.8.8:53 | 22.221.185.147.in-addr.arpa | udp |
| DE | 195.201.57.90:443 | ipwho.is | tcp |
| US | 8.8.8.8:53 | 90.57.201.195.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 149.220.183.52.in-addr.arpa | udp |
| 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 | 34.56.20.217.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 25.140.123.92.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 240.143.123.92.in-addr.arpa | udp |
| US | 147.185.221.22:6712 | tcp | |
| US | 8.8.8.8:53 | 172.210.232.199.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 19.229.111.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | tse1.mm.bing.net | udp |
| US | 150.171.28.10:443 | tse1.mm.bing.net | tcp |
| US | 150.171.28.10:443 | tse1.mm.bing.net | tcp |
| US | 150.171.28.10:443 | tse1.mm.bing.net | tcp |
| US | 150.171.28.10:443 | tse1.mm.bing.net | tcp |
| US | 8.8.8.8:53 | 57.169.31.20.in-addr.arpa | udp |
Files
memory/2932-0-0x00007FF88A013000-0x00007FF88A015000-memory.dmp
memory/2932-1-0x0000000000060000-0x00000000003B8000-memory.dmp
memory/2932-2-0x00007FF88A010000-0x00007FF88AAD1000-memory.dmp
C:\Windows\System32\Windows\Windows Host Process.exe
| MD5 | 9eb8732b560208f0380c386771aba096 |
| SHA1 | d2ae1ff6755e79f97485aea27912ed7710378b08 |
| SHA256 | d00477c11f3c8ad73a0ea9c3c4b7e549754ed63b645a3a8f57de6dd2f89ec8d0 |
| SHA512 | 686b1968a19d6f81562df6efd659060ecc7d2eceb7b053d530e8bcba030db6e7b55cb7c6364d6dddc7ea9a46b5004cae3a78db5b432ed279ce2fa854fa400b8a |
memory/3008-9-0x00007FF88A010000-0x00007FF88AAD1000-memory.dmp
memory/3008-10-0x00007FF88A010000-0x00007FF88AAD1000-memory.dmp
memory/3008-11-0x000000001C090000-0x000000001C0E0000-memory.dmp
memory/3008-12-0x000000001C1A0000-0x000000001C252000-memory.dmp
memory/3008-15-0x000000001C120000-0x000000001C132000-memory.dmp
memory/3008-16-0x000000001C8A0000-0x000000001C8DC000-memory.dmp
memory/2932-17-0x00007FF88A010000-0x00007FF88AAD1000-memory.dmp
memory/3008-18-0x00007FF88A010000-0x00007FF88AAD1000-memory.dmp
memory/3008-19-0x000000001CCE0000-0x000000001CE89000-memory.dmp