Analysis
- max time kernel
149s - max time network
152s - platform
windows11-21h2_x64 - resource
win11-20251218-en - resource tags
- submitted
23/12/2025, 14:29
General
- Target Client-built.exe
- Size 3.2MB
- Sample251223-rtjfqsspbx
- SHA256 2aeef6545efb7b271af6e284b6128a3d7031cf2bcafc782d7912d312bedbba01
Malware Config
Extracted
-
quasar
-
1.4.1
-
Office04
-
wepay.in.net:4782
-
wepay.in.net:443
-
wepay.in.net:8843
-
wepay.in.net:8080
-
slotmachinesno.sa.com:8080
-
slotmachinesno.sa.com:443
-
slotmachinesno.sa.com:4782
-
slotmachinesno.sa.com:8843
-
digitalhari.in.net:8843
-
digitalhari.in.net:443
-
digitalhari.in.net:4782
-
digitalhari.in.net:8080
-
1037aa5e-4d7b-4e96-bd70-9a75bd845004
-
encryption_key
F116DDAE38E33B9D0D348291EF604EE1CEAE2461
-
install_name
CFArea1HorizonPro.exe
-
key_salt
bfeb1e56fbcd973bb219022430a57843003d5644d21e62b9d4f180e7e6c33941
-
log_directory
Logs
-
reconnect_delay
3000
-
startup_key
Nexus CyberShield Service
-
subdirectory
CloudflareHorizonPro
Signatures
- Quasar RAT
Quasar is an open source Remote Access Tool.
- Quasar family
- Quasar payload 2 IoCs
- Executes dropped EXE 2 IoCs
- Drops file in System32 directory 2 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 3 IoCs
- Suspicious use of FindShellTrayWindow 1 IoCs
- Suspicious use of SendNotifyMessage 1 IoCs
- Suspicious use of SetWindowsHookEx 1 IoCs
- Suspicious use of WriteProcessMemory 3 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\Client-built.exe"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "Nexus CyberShield Service" /sc ONLOGON /tr "C:\Windows\system32\CloudflareHorizonPro\CFArea1HorizonPro.exe" /rl HIGHEST /f2⤵
- Scheduled Task/Job: Scheduled Task
-
-
C:\Windows\system32\CloudflareHorizonPro\CFArea1HorizonPro.exe"C:\Windows\system32\CloudflareHorizonPro\CFArea1HorizonPro.exe"2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
-
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "Nexus CyberShield Service" /sc ONLOGON /tr "C:\Windows\system32\CloudflareHorizonPro\CFArea1HorizonPro.exe" /rl HIGHEST /f3⤵
- Scheduled Task/Job: Scheduled Task
-
-
-
C:\Windows\system32\CloudflareHorizonPro\CFArea1HorizonPro.exeC:\Windows\system32\CloudflareHorizonPro\CFArea1HorizonPro.exe1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
Loading Replay Monitor...
Downloads
CFArea1HorizonPro.exe
memory/3152-7-0x000000001BCF0000-0x000000001BD00000-memory.dmp
memory/3152-9-0x000000001C300000-0x000000001C350000-memory.dmp
memory/3152-10-0x000000001C410000-0x000000001C4C2000-memory.dmp
memory/3152-12-0x000000001BCF0000-0x000000001BD00000-memory.dmp
memory/4908-0-0x0000000000EC0000-0x00000000011F4000-memory.dmp
memory/4908-1-0x000000001BF50000-0x000000001BF60000-memory.dmp