Analysis Overview
SHA256
0fff45906cb1259652e8488ce8b7ce888a63c97332d9e3c7eb93b4c2aac1ea38
Threat Level: Known bad
The file Client-built.exe was found to be: Known bad.
Malicious Activity Summary
Quasar payload
Quasar RAT
Quasar family
Executes dropped EXE
Unsigned PE
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Analysis: static1
Detonation Overview
Reported
2024-08-04 00:42
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
2024-08-04 00:42
Reported
2024-08-04 00:44
Platform
win7-20240705-en
Max time kernel
148s
Max time network
123s
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 |
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 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 3028 wrote to memory of 316 | N/A | C:\Users\Admin\AppData\Local\Temp\Client-built.exe | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe |
| PID 3028 wrote to memory of 316 | N/A | C:\Users\Admin\AppData\Local\Temp\Client-built.exe | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe |
| PID 3028 wrote to memory of 316 | N/A | C:\Users\Admin\AppData\Local\Temp\Client-built.exe | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\Client-built.exe
"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
"C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
Network
| Country | Destination | Domain | Proto |
| N/A | 127.0.0.1:80 | tcp | |
| N/A | 127.0.0.1:80 | tcp | |
| N/A | 127.0.0.1:80 | tcp | |
| N/A | 127.0.0.1:80 | tcp | |
| N/A | 127.0.0.1:80 | tcp | |
| N/A | 127.0.0.1:80 | tcp | |
| N/A | 127.0.0.1:80 | tcp | |
| N/A | 127.0.0.1:80 | tcp | |
| N/A | 127.0.0.1:80 | tcp | |
| N/A | 127.0.0.1:80 | tcp | |
| N/A | 127.0.0.1:80 | tcp | |
| N/A | 127.0.0.1:80 | tcp | |
| N/A | 127.0.0.1:80 | tcp | |
| N/A | 127.0.0.1:80 | tcp | |
| N/A | 127.0.0.1:80 | tcp | |
| N/A | 127.0.0.1:80 | tcp | |
| N/A | 127.0.0.1:80 | tcp | |
| N/A | 127.0.0.1:80 | tcp | |
| N/A | 127.0.0.1:80 | tcp | |
| N/A | 127.0.0.1:80 | tcp | |
| N/A | 127.0.0.1:80 | tcp | |
| N/A | 127.0.0.1:80 | tcp | |
| N/A | 127.0.0.1:80 | tcp | |
| N/A | 127.0.0.1:80 | tcp | |
| N/A | 127.0.0.1:80 | tcp | |
| N/A | 127.0.0.1:80 | tcp | |
| N/A | 127.0.0.1:80 | tcp | |
| N/A | 127.0.0.1:80 | tcp | |
| N/A | 127.0.0.1:80 | tcp | |
| N/A | 127.0.0.1:80 | tcp | |
| N/A | 127.0.0.1:80 | tcp | |
| N/A | 127.0.0.1:80 | tcp | |
| N/A | 127.0.0.1:80 | tcp |
Files
memory/3028-0-0x000007FEF5BD3000-0x000007FEF5BD4000-memory.dmp
memory/3028-1-0x0000000001380000-0x00000000016A4000-memory.dmp
memory/3028-2-0x000007FEF5BD0000-0x000007FEF65BC000-memory.dmp
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
| MD5 | 94050f9434efcd579e1be0f1698dc4be |
| SHA1 | b1f9f9bb740805af70d91fd8dc16034fe6108b86 |
| SHA256 | 0fff45906cb1259652e8488ce8b7ce888a63c97332d9e3c7eb93b4c2aac1ea38 |
| SHA512 | ed580833c456aafdd84871883f9bd2820e9c6a07e3402f69d5c632498491dba399c6e2464ef9379c944e7a4859ed634803d348d9ea24beb27d8dec47b64c09ad |
memory/316-7-0x000007FEF5BD0000-0x000007FEF65BC000-memory.dmp
memory/316-9-0x0000000000D00000-0x0000000001024000-memory.dmp
memory/3028-8-0x000007FEF5BD0000-0x000007FEF65BC000-memory.dmp
memory/316-10-0x000007FEF5BD0000-0x000007FEF65BC000-memory.dmp
memory/316-11-0x000007FEF5BD0000-0x000007FEF65BC000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-08-04 00:42
Reported
2024-08-04 00:44
Platform
win10v2004-20240802-en
Max time kernel
150s
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:\Users\Admin\AppData\Roaming\SubDir\Client.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 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 4396 wrote to memory of 1576 | N/A | C:\Users\Admin\AppData\Local\Temp\Client-built.exe | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe |
| PID 4396 wrote to memory of 1576 | N/A | C:\Users\Admin\AppData\Local\Temp\Client-built.exe | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\Client-built.exe
"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
"C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | g.bing.com | udp |
| US | 13.107.21.237:443 | g.bing.com | tcp |
| US | 8.8.8.8:53 | 8.8.8.8.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 237.21.107.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 68.159.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 73.144.22.2.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 57.169.31.20.in-addr.arpa | udp |
| N/A | 127.0.0.1:80 | tcp | |
| N/A | 127.0.0.1:80 | tcp | |
| N/A | 127.0.0.1:80 | tcp | |
| N/A | 127.0.0.1:80 | tcp | |
| N/A | 127.0.0.1:80 | tcp | |
| N/A | 127.0.0.1:80 | tcp | |
| US | 8.8.8.8:53 | 183.59.114.20.in-addr.arpa | udp |
| N/A | 127.0.0.1:80 | tcp | |
| US | 8.8.8.8:53 | 206.23.85.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 59.170.16.2.in-addr.arpa | udp |
| N/A | 127.0.0.1:80 | tcp | |
| N/A | 127.0.0.1:80 | tcp | |
| N/A | 127.0.0.1:80 | tcp | |
| N/A | 127.0.0.1:80 | tcp | |
| N/A | 127.0.0.1:80 | tcp | |
| N/A | 127.0.0.1:80 | tcp | |
| N/A | 127.0.0.1:80 | tcp | |
| N/A | 127.0.0.1:80 | tcp | |
| N/A | 127.0.0.1:80 | tcp | |
| N/A | 127.0.0.1:80 | tcp | |
| US | 8.8.8.8:53 | 43.229.111.52.in-addr.arpa | udp |
| N/A | 127.0.0.1:80 | tcp | |
| N/A | 127.0.0.1:80 | tcp | |
| N/A | 127.0.0.1:80 | tcp | |
| N/A | 127.0.0.1:80 | tcp | |
| N/A | 127.0.0.1:80 | tcp | |
| N/A | 127.0.0.1:80 | tcp | |
| N/A | 127.0.0.1:80 | tcp | |
| N/A | 127.0.0.1:80 | tcp | |
| N/A | 127.0.0.1:80 | tcp | |
| N/A | 127.0.0.1:80 | tcp | |
| US | 8.8.8.8:53 | 195.201.50.20.in-addr.arpa | udp |
Files
memory/4396-0-0x00007FFA82CB3000-0x00007FFA82CB5000-memory.dmp
memory/4396-1-0x0000000000440000-0x0000000000764000-memory.dmp
memory/4396-2-0x00007FFA82CB0000-0x00007FFA83771000-memory.dmp
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
| MD5 | 94050f9434efcd579e1be0f1698dc4be |
| SHA1 | b1f9f9bb740805af70d91fd8dc16034fe6108b86 |
| SHA256 | 0fff45906cb1259652e8488ce8b7ce888a63c97332d9e3c7eb93b4c2aac1ea38 |
| SHA512 | ed580833c456aafdd84871883f9bd2820e9c6a07e3402f69d5c632498491dba399c6e2464ef9379c944e7a4859ed634803d348d9ea24beb27d8dec47b64c09ad |
memory/4396-9-0x00007FFA82CB0000-0x00007FFA83771000-memory.dmp
memory/1576-8-0x00007FFA82CB0000-0x00007FFA83771000-memory.dmp
memory/1576-10-0x00007FFA82CB0000-0x00007FFA83771000-memory.dmp
memory/1576-11-0x0000000002A70000-0x0000000002AC0000-memory.dmp
memory/1576-12-0x000000001B480000-0x000000001B532000-memory.dmp
memory/1576-13-0x00007FFA82CB0000-0x00007FFA83771000-memory.dmp