Analysis Overview
SHA256
745a69ac20dbb2482e7512bbc14950fa41bf78dbd0a5afda0396c8d897b50002
Threat Level: Known bad
The file 745a69ac20dbb2482e7512bbc14950fa41bf78dbd0a5afda0396c8d897b50002 was found to be: Known bad.
Malicious Activity Summary
Quasar payload
Quasar family
Quasar RAT
Detects executables containing common artifacts observed in infostealers
Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers.
Detects Windows executables referencing non-Windows User-Agents
Detects Windows executables referencing non-Windows User-Agents
Detects executables containing common artifacts observed in infostealers
Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers.
Executes dropped EXE
Unsigned PE
Uses Task Scheduler COM API
Creates scheduled task(s)
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-04-08 22:28
Signatures
Detects Windows executables referencing non-Windows User-Agents
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers.
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Detects executables containing common artifacts observed in infostealers
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
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
2024-04-08 22:28
Reported
2024-04-08 22:30
Platform
win7-20240221-en
Max time kernel
129s
Max time network
142s
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 |
Detects Windows executables referencing non-Windows User-Agents
| 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 |
Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers.
| 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 |
Detects executables containing common artifacts observed in infostealers
| 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\Twrek.exe | N/A |
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\745a69ac20dbb2482e7512bbc14950fa41bf78dbd0a5afda0396c8d897b50002.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Roaming\SubDir\Twrek.exe | N/A |
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\SubDir\Twrek.exe | N/A |
Suspicious use of WriteProcessMemory
Uses Task Scheduler COM API
Processes
C:\Users\Admin\AppData\Local\Temp\745a69ac20dbb2482e7512bbc14950fa41bf78dbd0a5afda0396c8d897b50002.exe
"C:\Users\Admin\AppData\Local\Temp\745a69ac20dbb2482e7512bbc14950fa41bf78dbd0a5afda0396c8d897b50002.exe"
C:\Windows\system32\schtasks.exe
"schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Twrek.exe" /rl HIGHEST /f
C:\Users\Admin\AppData\Roaming\SubDir\Twrek.exe
"C:\Users\Admin\AppData\Roaming\SubDir\Twrek.exe"
C:\Windows\system32\schtasks.exe
"schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Twrek.exe" /rl HIGHEST /f
Network
| Country | Destination | Domain | Proto |
| N/A | 10.127.0.54:4782 | tcp | |
| N/A | 10.127.0.54:4782 | tcp | |
| N/A | 10.127.0.54:4782 | tcp | |
| N/A | 10.127.0.54:4782 | tcp | |
| N/A | 10.127.0.54:4782 | tcp | |
| N/A | 10.127.0.54:4782 | tcp |
Files
memory/2336-0-0x00000000013B0000-0x00000000016D4000-memory.dmp
memory/2336-1-0x000007FEF58D0000-0x000007FEF62BC000-memory.dmp
memory/2336-2-0x000000001B370000-0x000000001B3F0000-memory.dmp
C:\Users\Admin\AppData\Roaming\SubDir\Twrek.exe
| MD5 | ed8542b4688d70d42d77fad98e5969b0 |
| SHA1 | 808666505eeca15e9a7a15b95ff439497a9f1dcf |
| SHA256 | 745a69ac20dbb2482e7512bbc14950fa41bf78dbd0a5afda0396c8d897b50002 |
| SHA512 | 72fc0930a4e51eb7a7b76bac97c64c9bb8e8fe30a406b294a824ecc721677c212d409368a6bca595b0ee82449d80cf7c09f4a063bbe7ee47ebcba30c5c3b6a45 |
memory/2336-8-0x000007FEF58D0000-0x000007FEF62BC000-memory.dmp
memory/2132-10-0x000007FEF58D0000-0x000007FEF62BC000-memory.dmp
memory/2132-9-0x00000000001A0000-0x00000000004C4000-memory.dmp
memory/2132-11-0x000007FEF58D0000-0x000007FEF62BC000-memory.dmp
memory/2132-12-0x000000001B3C0000-0x000000001B440000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-04-08 22:28
Reported
2024-04-08 22:30
Platform
win10v2004-20240226-en
Max time kernel
147s
Max time network
156s
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 |
Detects Windows executables referencing non-Windows User-Agents
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers.
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
Detects executables containing common artifacts observed in infostealers
| 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\Twrek.exe | N/A |
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\745a69ac20dbb2482e7512bbc14950fa41bf78dbd0a5afda0396c8d897b50002.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Roaming\SubDir\Twrek.exe | N/A |
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\SubDir\Twrek.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 1008 wrote to memory of 1044 | N/A | C:\Users\Admin\AppData\Local\Temp\745a69ac20dbb2482e7512bbc14950fa41bf78dbd0a5afda0396c8d897b50002.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 1008 wrote to memory of 1044 | N/A | C:\Users\Admin\AppData\Local\Temp\745a69ac20dbb2482e7512bbc14950fa41bf78dbd0a5afda0396c8d897b50002.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 1008 wrote to memory of 4264 | N/A | C:\Users\Admin\AppData\Local\Temp\745a69ac20dbb2482e7512bbc14950fa41bf78dbd0a5afda0396c8d897b50002.exe | C:\Users\Admin\AppData\Roaming\SubDir\Twrek.exe |
| PID 1008 wrote to memory of 4264 | N/A | C:\Users\Admin\AppData\Local\Temp\745a69ac20dbb2482e7512bbc14950fa41bf78dbd0a5afda0396c8d897b50002.exe | C:\Users\Admin\AppData\Roaming\SubDir\Twrek.exe |
| PID 4264 wrote to memory of 2488 | N/A | C:\Users\Admin\AppData\Roaming\SubDir\Twrek.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 4264 wrote to memory of 2488 | N/A | C:\Users\Admin\AppData\Roaming\SubDir\Twrek.exe | C:\Windows\SYSTEM32\schtasks.exe |
Uses Task Scheduler COM API
Processes
C:\Users\Admin\AppData\Local\Temp\745a69ac20dbb2482e7512bbc14950fa41bf78dbd0a5afda0396c8d897b50002.exe
"C:\Users\Admin\AppData\Local\Temp\745a69ac20dbb2482e7512bbc14950fa41bf78dbd0a5afda0396c8d897b50002.exe"
C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Twrek.exe" /rl HIGHEST /f
C:\Users\Admin\AppData\Roaming\SubDir\Twrek.exe
"C:\Users\Admin\AppData\Roaming\SubDir\Twrek.exe"
C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Twrek.exe" /rl HIGHEST /f
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 28.118.140.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 240.197.17.2.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 178.223.142.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 140.32.126.40.in-addr.arpa | udp |
| N/A | 10.127.0.54:4782 | tcp | |
| US | 8.8.8.8:53 | 217.106.137.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 13.86.106.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 228.249.119.40.in-addr.arpa | udp |
| N/A | 10.127.0.54:4782 | tcp | |
| US | 8.8.8.8:53 | 159.113.53.23.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 157.123.68.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 18.31.95.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 140.71.91.104.in-addr.arpa | udp |
| N/A | 10.127.0.54:4782 | tcp | |
| US | 8.8.8.8:53 | 249.197.17.2.in-addr.arpa | udp |
| N/A | 10.127.0.54:4782 | tcp | |
| US | 8.8.8.8:53 | 22.236.111.52.in-addr.arpa | udp |
| N/A | 10.127.0.54:4782 | tcp | |
| N/A | 10.127.0.54:4782 | tcp | |
| US | 8.8.8.8:53 | 252.15.104.51.in-addr.arpa | udp |
Files
memory/1008-0-0x00000000006C0000-0x00000000009E4000-memory.dmp
memory/1008-1-0x00007FFDF91D0000-0x00007FFDF9C91000-memory.dmp
memory/1008-2-0x0000000002AD0000-0x0000000002AE0000-memory.dmp
C:\Users\Admin\AppData\Roaming\SubDir\Twrek.exe
| MD5 | ed8542b4688d70d42d77fad98e5969b0 |
| SHA1 | 808666505eeca15e9a7a15b95ff439497a9f1dcf |
| SHA256 | 745a69ac20dbb2482e7512bbc14950fa41bf78dbd0a5afda0396c8d897b50002 |
| SHA512 | 72fc0930a4e51eb7a7b76bac97c64c9bb8e8fe30a406b294a824ecc721677c212d409368a6bca595b0ee82449d80cf7c09f4a063bbe7ee47ebcba30c5c3b6a45 |
memory/4264-9-0x00007FFDF91D0000-0x00007FFDF9C91000-memory.dmp
memory/4264-10-0x000000001BB20000-0x000000001BB30000-memory.dmp
memory/4264-11-0x000000001BA60000-0x000000001BAB0000-memory.dmp
memory/4264-12-0x000000001C2E0000-0x000000001C392000-memory.dmp
memory/1008-13-0x00007FFDF91D0000-0x00007FFDF9C91000-memory.dmp
memory/4264-14-0x00007FFDF91D0000-0x00007FFDF9C91000-memory.dmp
memory/4264-15-0x000000001BB20000-0x000000001BB30000-memory.dmp