Analysis
- max time kernel
149s - max time network
151s - platform
windows10-2004_x64 - resource
win10v2004-20260130-en - resource tags
- submitted
24/04/2026, 13:12
General
- Target AsyncClient_climaxmx_com_CX4RUtGh.exe
- Size 45KB
- Sample260424-qff8saaz4x
- SHA256 04fb8cb084ef41d7d0cc5316499b54a64ac2a09409efe7ebbd5543616a0447d2
Malware Config
Extracted
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asyncrat
-
0.5.8
-
Default
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climaxmx.com:443
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www.climaxmx.com:443
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UjK8tjxGIZy3
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delay
0
-
install
true
-
install_file
AsyncClient.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 2 IoCs
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- Executes dropped EXE 2 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- 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 23 IoCs
- Suspicious use of AdjustPrivilegeToken 2 IoCs
- Suspicious use of WriteProcessMemory 5 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\AsyncClient_climaxmx_com_CX4RUtGh.exe"C:\Users\Admin\AppData\Local\Temp\AsyncClient_climaxmx_com_CX4RUtGh.exe"1⤵
- Checks computer location settings
- 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 "AsyncClient" /tr '"C:\Users\Admin\AppData\Roaming\AsyncClient.exe"' & exit2⤵
- 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 "AsyncClient" /tr '"C:\Users\Admin\AppData\Roaming\AsyncClient.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\tmp118F.tmp.bat""2⤵
- 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\AsyncClient.exe"C:\Users\Admin\AppData\Roaming\AsyncClient.exe"3⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
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-
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C:\Users\Admin\AppData\Roaming\AsyncClient.exe"C:\Users\Admin\AppData\Roaming\AsyncClient.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
tmp118F.tmp.bat
AsyncClient.exe
memory/1564-14-0x0000000002CF0000-0x0000000002D08000-memory.dmp
memory/1564-15-0x0000000002D10000-0x0000000002D29000-memory.dmp
memory/2440-16-0x00000000028F0000-0x0000000002908000-memory.dmp
memory/2440-11-0x0000000004E50000-0x0000000004E60000-memory.dmp
memory/2440-17-0x0000000002910000-0x0000000002929000-memory.dmp
memory/2440-18-0x0000000004E50000-0x0000000004E60000-memory.dmp
memory/2440-29-0x0000000002950000-0x000000000295A000-memory.dmp
memory/4612-7-0x00000000032E0000-0x00000000032F9000-memory.dmp
memory/4612-2-0x0000000005940000-0x00000000059DC000-memory.dmp
memory/4612-1-0x0000000005930000-0x0000000005940000-memory.dmp
memory/4612-0-0x0000000000F40000-0x0000000000F52000-memory.dmp