Analysis
- max time kernel
9s - max time network
61s - platform
windows11-ltsc_2024_x64 - resource
win11ltsc2024-20260911-en - resource tags
- submitted
04/10/2026, 19:06
General
- Target d4923f3f64dabce26ded8f84fbc3e6c9462d3a436d87715efb580a29d3cd966b.exe
- Size 47KB
- Sample261004-xsd3hsverf
- SHA256 d4923f3f64dabce26ded8f84fbc3e6c9462d3a436d87715efb580a29d3cd966b
Malware Config
Extracted
-
asyncrat
-
0.5.8
-
Default
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tcp2.tunnel4.com:36056
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Ytr2oRpNJwjJ
-
delay
3
-
install
true
-
install_file
RtkAudUService64.exe
-
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\d4923f3f64dabce26ded8f84fbc3e6c9462d3a436d87715efb580a29d3cd966b.exe"C:\Users\Admin\AppData\Local\Temp\d4923f3f64dabce26ded8f84fbc3e6c9462d3a436d87715efb580a29d3cd966b.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 "RtkAudUService64" /tr '"C:\Users\Admin\AppData\Roaming\RtkAudUService64.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 "RtkAudUService64" /tr '"C:\Users\Admin\AppData\Roaming\RtkAudUService64.exe"'3⤵
- System Location Discovery: System Language Discovery
- Scheduled Task/Job: Scheduled Task
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-
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C:\Windows\SysWOW64\cmd.exeC:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpA7B0.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\RtkAudUService64.exe"C:\Users\Admin\AppData\Roaming\RtkAudUService64.exe"3⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
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-
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C:\Users\Admin\AppData\Roaming\RtkAudUService64.exe"C:\Users\Admin\AppData\Roaming\RtkAudUService64.exe"1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
tmpA7B0.tmp.bat
RtkAudUService64.exe
memory/4176-0-0x00000000748A2000-0x00000000748A3000-memory.dmp
memory/4176-1-0x0000000000C80000-0x0000000000C92000-memory.dmp
memory/4176-2-0x0000000074890000-0x000000007504C000-memory.dmp
memory/4176-3-0x0000000005710000-0x00000000057AC000-memory.dmp
memory/4176-8-0x0000000074890000-0x000000007504C000-memory.dmp
memory/5524-12-0x0000000074820000-0x0000000074FDC000-memory.dmp
memory/5524-14-0x0000000074820000-0x0000000074FDC000-memory.dmp