Analysis
- max time kernel
148s - max time network
151s - platform
windows11-ltsc_2024_x64 - resource
win11ltsc2024-20260709-en - resource tags
- submitted
12/08/2026, 23:17
General
- Target 40256861cdf7567ed71bbc5196fdae5e89580c94ff5342d408887c9e17999209.exe
- Size 140KB
- Sample260812-29p9bsfc72
- SHA256 40256861cdf7567ed71bbc5196fdae5e89580c94ff5342d408887c9e17999209
Malware Config
Extracted
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asyncrat
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0.5.8
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Default
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kubetchinh.com:6606
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kubetchinh.com:7707
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kubetchinh.com:8808
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kubetchinh.com:443
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kubetchinh.com:80
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cJd7AQuR1X0e
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delay
3
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install
true
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install_file
kubetchinh.exe
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install_folder
%AppData%
Signatures
- Family: AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
- Async RAT payload 1 IoCs
- Executes dropped EXE 2 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- 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 Location Discovery: System Language Discovery 1 TTPs 7 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
- Delays execution with timeout.exe 1 IoCs
- Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
- Suspicious behavior: EnumeratesProcesses 31 IoCs
- Suspicious use of AdjustPrivilegeToken 2 IoCs
- Suspicious use of WriteProcessMemory 5 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\40256861cdf7567ed71bbc5196fdae5e89580c94ff5342d408887c9e17999209.exe"C:\Users\Admin\AppData\Local\Temp\40256861cdf7567ed71bbc5196fdae5e89580c94ff5342d408887c9e17999209.exe"1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "kubetchinh" /tr '"C:\Users\Admin\AppData\Roaming\kubetchinh.exe"' & exit2⤵
- Executes a command shell one-liner
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\schtasks.exeschtasks /create /f /sc onlogon /rl highest /tn "kubetchinh" /tr '"C:\Users\Admin\AppData\Roaming\kubetchinh.exe"'3⤵
- System Location Discovery: System Language Discovery
- Scheduled Task/Job: Scheduled Task
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C:\Windows\SysWOW64\cmd.exeC:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp5DE5.tmp.bat""2⤵
- Executes a command shell one-liner
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\timeout.exetimeout 33⤵
- System Location Discovery: System Language Discovery
- Delays execution with timeout.exe
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C:\Users\Admin\AppData\Roaming\kubetchinh.exe"C:\Users\Admin\AppData\Roaming\kubetchinh.exe"3⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
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C:\Users\Admin\AppData\Roaming\kubetchinh.exe"C:\Users\Admin\AppData\Roaming\kubetchinh.exe"1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
tmp5DE5.tmp.bat
kubetchinh.exe
memory/4128-0-0x0000000074C62000-0x0000000074C63000-memory.dmp
memory/4128-1-0x0000000000E20000-0x0000000000E4A000-memory.dmp
memory/4128-2-0x0000000074C50000-0x000000007540C000-memory.dmp
memory/4128-3-0x0000000005990000-0x0000000005A2C000-memory.dmp
memory/4128-8-0x0000000074C50000-0x000000007540C000-memory.dmp
memory/6108-12-0x0000000074A50000-0x000000007520C000-memory.dmp
memory/6108-14-0x0000000074A50000-0x000000007520C000-memory.dmp