Analysis
- max time kernel
148s - max time network
149s - platform
windows11-ltsc_2024_x64 - resource
win11ltsc2024-20260911-en - resource tags
- submitted
28/10/2026, 14:21
General
- Target 138club.co.exe
- Size 3.1MB
- Sample261028-rpea8a11cx
- SHA256 963120079f4f3f10ae25506195f7611b2a1a4dd94cc96c374f562fd67e17cdde
Malware Config
Extracted
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quasar
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1.4.1
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138club.co
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138club.co:43
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138club.co:443
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138club.co:8080
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138club.co:80
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138club.co:81
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https://138club.co:80
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https://138club.co:81
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https://138club.co/:43
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5150774e-14d8-4da3-8bb2-ba3c6774b129
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encryption_key
61D61573755A2E8791F777F44FE72A8C404B3F90
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install_name
mozilla.exe
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key_salt
bfeb1e56fbcd973bb219022430a57843003d5644d21e62b9d4f180e7e6c33941
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log_directory
Logs
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reconnect_delay
3000
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startup_key
https://138club.co/
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subdirectory
mu88
Signatures
- Family: Quasar RAT
Quasar is an open source Remote Access Tool.
- Quasar payload 2 IoCs
- Executes dropped EXE 2 IoCs
- Adds Run key to start application 2 TTPs 2 IoCs
- Executes a command shell one-liner 1 TTPs 2 IoCs
Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.
- System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 2 IoCs
Adversaries may check for Internet connectivity on compromised systems.
- Runs ping.exe 1 TTPs 2 IoCs
- Scheduled Task/Job: Scheduled Task 1 TTPs 3 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
- Suspicious use of AdjustPrivilegeToken 3 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
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C:\Users\Admin\AppData\Local\Temp\138club.co.exe"C:\Users\Admin\AppData\Local\Temp\138club.co.exe"1⤵
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "https://138club.co/" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\mu88\mozilla.exe" /rl HIGHEST /f2⤵
- Scheduled Task/Job: Scheduled Task
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C:\Users\Admin\AppData\Roaming\mu88\mozilla.exe"C:\Users\Admin\AppData\Roaming\mu88\mozilla.exe"2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
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C:\Users\Admin\AppData\Roaming\mu88\mozilla.exeC:\Users\Admin\AppData\Roaming\mu88\mozilla.exe1⤵
- Executes dropped EXE
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "https://138club.co/" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\mu88\mozilla.exe" /rl HIGHEST /f2⤵
- Scheduled Task/Job: Scheduled Task
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C:\Windows\system32\cmd.exeC:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\9rxehHspzbIH.bat" "2⤵
- Executes a command shell one-liner
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C:\Windows\system32\chcp.comchcp 650013⤵
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C:\Windows\system32\PING.EXEping -n 10 localhost3⤵
- System Network Configuration Discovery: Internet Connection Discovery
- Runs ping.exe
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C:\Users\Admin\AppData\Roaming\mu88\mozilla.exe"C:\Users\Admin\AppData\Roaming\mu88\mozilla.exe"3⤵
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C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "https://138club.co/" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\mu88\mozilla.exe" /rl HIGHEST /f4⤵
- Scheduled Task/Job: Scheduled Task
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C:\Windows\system32\cmd.exeC:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\MQ0ldnJFFky8.bat" "4⤵
- Executes a command shell one-liner
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C:\Windows\system32\chcp.comchcp 650015⤵
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C:\Windows\system32\PING.EXEping -n 10 localhost5⤵
- System Network Configuration Discovery: Internet Connection Discovery
- Runs ping.exe
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Network
MITRE ATT&CK Enterprise v16
Execution
Command and Scripting Interpreter
1Windows Command Shell
1Scheduled Task/Job
1Scheduled Task
1Persistence
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Scheduled Task/Job
1Scheduled Task
1Privilege Escalation
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Scheduled Task/Job
1Scheduled Task
1Replay Monitor
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Downloads
9rxehHspzbIH.bat
MQ0ldnJFFky8.bat
mozilla.exe
memory/236-7-0x00007FFDCD620000-0x00007FFDCDFC4000-memory.dmp
memory/236-10-0x00007FFDCD620000-0x00007FFDCDFC4000-memory.dmp
memory/236-5-0x00007FFDCD620000-0x00007FFDCDFC4000-memory.dmp
memory/236-6-0x00007FFDCD620000-0x00007FFDCDFC4000-memory.dmp
memory/236-0-0x00007FFDCD7AF000-0x00007FFDCD7B0000-memory.dmp
memory/236-8-0x00007FFDCD620000-0x00007FFDCDFC4000-memory.dmp
memory/236-9-0x00007FFDCD620000-0x00007FFDCDFC4000-memory.dmp
memory/236-2-0x00007FFDCD620000-0x00007FFDCDFC4000-memory.dmp
memory/236-11-0x00007FFDCD620000-0x00007FFDCDFC4000-memory.dmp
memory/236-12-0x00007FFDCD620000-0x00007FFDCDFC4000-memory.dmp
memory/236-13-0x00007FFDCD620000-0x00007FFDCDFC4000-memory.dmp
memory/236-3-0x00007FFDCD620000-0x00007FFDCDFC4000-memory.dmp
memory/236-16-0x00007FFDCD620000-0x00007FFDCDFC4000-memory.dmp
memory/236-4-0x00007FFDCD620000-0x00007FFDCDFC4000-memory.dmp
memory/236-1-0x0000000000FD0000-0x00000000012F4000-memory.dmp
memory/236-15-0x00007FFDCD620000-0x00007FFDCDFC4000-memory.dmp
memory/4048-17-0x00007FFDCD620000-0x00007FFDCDFC4000-memory.dmp
memory/4048-21-0x00007FFDCD620000-0x00007FFDCDFC4000-memory.dmp
memory/4048-22-0x00007FFDCD620000-0x00007FFDCDFC4000-memory.dmp
memory/4048-19-0x00007FFDCD620000-0x00007FFDCDFC4000-memory.dmp
memory/4048-26-0x00007FFDCD620000-0x00007FFDCDFC4000-memory.dmp
memory/4048-20-0x00007FFDCD620000-0x00007FFDCDFC4000-memory.dmp
memory/4048-18-0x00007FFDCD620000-0x00007FFDCDFC4000-memory.dmp
memory/5708-24-0x00000000027E0000-0x0000000002830000-memory.dmp
memory/5708-25-0x000000001C940000-0x000000001C9F2000-memory.dmp