Analysis Overview
SHA256
342c074263edefc48959a9c15cb1cc05046c53a1607728eb6679f9c8303680a0
Threat Level: Known bad
The file Loader.exe was found to be: Known bad.
Malicious Activity Summary
Quasar payload
Quasar RAT
Quasar family
Executes dropped EXE
Unsigned PE
Scheduled Task/Job: Scheduled Task
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Uses Task Scheduler COM API
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-07-28 19:07
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: behavioral2
Detonation Overview
Submitted
2024-07-28 19:07
Reported
2024-07-28 19:11
Platform
win10v2004-20240709-en
Max time kernel
149s
Max time network
154s
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 |
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\Loader.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 2948 wrote to memory of 208 | N/A | C:\Users\Admin\AppData\Local\Temp\Loader.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 2948 wrote to memory of 208 | N/A | C:\Users\Admin\AppData\Local\Temp\Loader.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 2948 wrote to memory of 4716 | N/A | C:\Users\Admin\AppData\Local\Temp\Loader.exe | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe |
| PID 2948 wrote to memory of 4716 | N/A | C:\Users\Admin\AppData\Local\Temp\Loader.exe | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe |
| PID 4716 wrote to memory of 1596 | N/A | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 4716 wrote to memory of 1596 | 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\Loader.exe
"C:\Users\Admin\AppData\Local\Temp\Loader.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 | 25.140.123.92.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 232.168.11.51.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 71.31.126.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 95.221.229.192.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 13.86.106.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 205.47.74.20.in-addr.arpa | udp |
| N/A | 192.168.1.51:4782 | tcp | |
| 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 | 237.197.79.204.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 97.17.167.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 50.23.12.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 18.31.95.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 38.58.20.217.in-addr.arpa | udp |
| N/A | 192.168.1.51:4782 | tcp | |
| N/A | 192.168.1.51:4782 | tcp | |
| US | 8.8.8.8:53 | 172.210.232.199.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 88.156.103.20.in-addr.arpa | udp |
| N/A | 192.168.1.51:4782 | tcp | |
| N/A | 192.168.1.51:4782 | tcp | |
| 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 | 150.171.28.10:443 | tse1.mm.bing.net | tcp |
| N/A | 192.168.1.51:4782 | tcp | |
| US | 8.8.8.8:53 | 67.112.168.52.in-addr.arpa | udp |
Files
memory/2948-0-0x00007FFC7FD73000-0x00007FFC7FD75000-memory.dmp
memory/2948-1-0x0000000000440000-0x0000000000764000-memory.dmp
memory/2948-2-0x00007FFC7FD70000-0x00007FFC80831000-memory.dmp
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
| MD5 | 6c0cfc9686b74302e726ddcc3252740e |
| SHA1 | a588ad7e2398448a1587576b1f90c9c59bcd78fc |
| SHA256 | 342c074263edefc48959a9c15cb1cc05046c53a1607728eb6679f9c8303680a0 |
| SHA512 | 1e9ae56b2ee6bef507cfd3137616b1ea0ffb98c4e0bd5fdf429fb77d5c6ee475ee9d22edacdc883dd7e0bd2b2b6c0e13c43a55f8cf3c84b229a98f42fa1acc02 |
memory/4716-10-0x00007FFC7FD70000-0x00007FFC80831000-memory.dmp
memory/2948-9-0x00007FFC7FD70000-0x00007FFC80831000-memory.dmp
memory/4716-11-0x00007FFC7FD70000-0x00007FFC80831000-memory.dmp
memory/4716-12-0x000000001B700000-0x000000001B750000-memory.dmp
memory/4716-13-0x000000001C090000-0x000000001C142000-memory.dmp
memory/4716-14-0x00007FFC7FD70000-0x00007FFC80831000-memory.dmp
memory/4716-15-0x00007FFC7FD70000-0x00007FFC80831000-memory.dmp
Analysis: behavioral1
Detonation Overview
Submitted
2024-07-28 19:07
Reported
2024-07-28 19:11
Platform
win7-20240708-en
Max time kernel
131s
Max time network
144s
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 |
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\Loader.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
Uses Task Scheduler COM API
Processes
C:\Users\Admin\AppData\Local\Temp\Loader.exe
"C:\Users\Admin\AppData\Local\Temp\Loader.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 |
| N/A | 192.168.1.51:4782 | tcp | |
| N/A | 192.168.1.51:4782 | tcp | |
| N/A | 192.168.1.51:4782 | tcp | |
| N/A | 192.168.1.51:4782 | tcp | |
| N/A | 192.168.1.51:4782 | tcp | |
| N/A | 192.168.1.51:4782 | tcp |
Files
memory/2356-0-0x000007FEF5B93000-0x000007FEF5B94000-memory.dmp
memory/2356-1-0x0000000000990000-0x0000000000CB4000-memory.dmp
memory/2356-2-0x000007FEF5B90000-0x000007FEF657C000-memory.dmp
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
| MD5 | 6c0cfc9686b74302e726ddcc3252740e |
| SHA1 | a588ad7e2398448a1587576b1f90c9c59bcd78fc |
| SHA256 | 342c074263edefc48959a9c15cb1cc05046c53a1607728eb6679f9c8303680a0 |
| SHA512 | 1e9ae56b2ee6bef507cfd3137616b1ea0ffb98c4e0bd5fdf429fb77d5c6ee475ee9d22edacdc883dd7e0bd2b2b6c0e13c43a55f8cf3c84b229a98f42fa1acc02 |
memory/2156-8-0x0000000001040000-0x0000000001364000-memory.dmp
memory/2156-9-0x000007FEF5B90000-0x000007FEF657C000-memory.dmp
memory/2156-10-0x000007FEF5B90000-0x000007FEF657C000-memory.dmp
memory/2356-11-0x000007FEF5B90000-0x000007FEF657C000-memory.dmp
memory/2156-12-0x000007FEF5B90000-0x000007FEF657C000-memory.dmp
memory/2156-13-0x000007FEF5B90000-0x000007FEF657C000-memory.dmp