Analysis
- max time kernel
148s - max time network
147s - platform
windows11-ltsc_2024_x64 - resource
win11ltsc2024-20260709-en - resource tags
- submitted
16/08/2026, 18:09
General
- Target AsyncClient.exe
- Size 45KB
- Sample260816-wryvvsfr2s
- SHA256 69d0efe48b1c7d59b613280efd1860d0019348c24bbf7d1ff8c17425f276ad00
Malware Config
Extracted
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asyncrat
-
0.5.7B
-
Default
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qh88v.com:8080
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qh88v.com:8443
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qh88v.com:80
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qh88v.com:443
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AsyncMutex_6SI8OkPnk
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delay
3
-
install
true
-
install_file
svchost.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 1 IoCs
- Suspicious use of WriteProcessMemory 5 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe"C:\Users\Admin\AppData\Local\Temp\AsyncClient.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 "svchost" /tr '"C:\Users\Admin\AppData\Roaming\svchost.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 "svchost" /tr '"C:\Users\Admin\AppData\Roaming\svchost.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\tmp1B9C.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\svchost.exe"C:\Users\Admin\AppData\Roaming\svchost.exe"3⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
-
-
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C:\Users\Admin\AppData\Roaming\svchost.exe"C:\Users\Admin\AppData\Roaming\svchost.exe"1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
tmp1B9C.tmp.bat
svchost.exe
memory/2632-12-0x0000000074670000-0x0000000074E2C000-memory.dmp
memory/2632-14-0x0000000074670000-0x0000000074E2C000-memory.dmp
memory/5676-0-0x0000000074682000-0x0000000074683000-memory.dmp
memory/5676-1-0x0000000000440000-0x0000000000452000-memory.dmp
memory/5676-2-0x0000000074670000-0x0000000074E2C000-memory.dmp
memory/5676-3-0x0000000004F40000-0x0000000004FDC000-memory.dmp
memory/5676-9-0x0000000074670000-0x0000000074E2C000-memory.dmp