Analysis
- max time kernel
105s - max time network
140s - platform
windows10-2004_x64 - resource
win10v2004-20250610-en - resource tags
- submitted
09/08/2025, 03:31
General
- Target e2f723fe52e61403dc1f2c664f20697de255aa51db780.exe
- Size 3.1MB
- Sample250809-d2216agj2x
- SHA256 e2f723fe52e61403dc1f2c664f20697de255aa51db780cc6353bf0eeeb386dfc
Malware Config
Extracted
-
quasar
-
1.4.1
-
Office04
-
45.32.188.16:4782
-
a1dd0451-550a-423e-9d0c-2c5d428006aa
-
encryption_key
5A02637EA4935A85024FB89EB09C832017BFE48A
-
install_name
Client.exe
-
key_salt
bfeb1e56fbcd973bb219022430a57843003d5644d21e62b9d4f180e7e6c33941
-
log_directory
Logs
-
reconnect_delay
3000
-
startup_key
Quasar Client Startup
-
subdirectory
SubDir
Signatures
- Quasar RAT
Quasar is an open source Remote Access Tool.
- Quasar family
- Quasar payload 2 IoCs
- Executes dropped EXE 1 IoCs
- Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
- Suspicious use of AdjustPrivilegeToken 2 IoCs
- Suspicious use of SetWindowsHookEx 1 IoCs
- Suspicious use of WriteProcessMemory 6 IoCs
- Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
Processes
-
C:\Users\Admin\AppData\Local\Temp\e2f723fe52e61403dc1f2c664f20697de255aa51db780.exe"C:\Users\Admin\AppData\Local\Temp\e2f723fe52e61403dc1f2c664f20697de255aa51db780.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f2⤵
- Scheduled Task/Job: Scheduled Task
-
-
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
-
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f3⤵
- Scheduled Task/Job: Scheduled Task
-
-
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
Loading Replay Monitor...
Downloads
Client.exe
memory/5220-0-0x0000000000A80000-0x0000000000DA4000-memory.dmp
memory/5220-1-0x000000001BAD0000-0x000000001BAE0000-memory.dmp
memory/5656-8-0x000000001BA90000-0x000000001BAA0000-memory.dmp
memory/5656-9-0x000000001DA60000-0x000000001DAB0000-memory.dmp
memory/5656-10-0x000000001DB70000-0x000000001DC22000-memory.dmp
memory/5656-13-0x000000001DB00000-0x000000001DB12000-memory.dmp
memory/5656-14-0x000000001E670000-0x000000001E6AC000-memory.dmp
memory/5656-15-0x000000001BA90000-0x000000001BAA0000-memory.dmp