Analysis
- max time kernel
5s - max time network
59s - platform
windows11-ltsc_2024_x64 - resource
win11ltsc2024-20260911-en - resource tags
- submitted
01/10/2026, 19:50
General
- Target 310b8c55065e31334ca38e155c06bb8180c6c9bfee31230a67d761546af4212f.exe
- Size 111KB
- Sample261001-ykl9lassav
- SHA256 310b8c55065e31334ca38e155c06bb8180c6c9bfee31230a67d761546af4212f
Malware Config
Extracted
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asyncrat
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0.5.8
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Default
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mb6696.onl:80
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mb6696.onl:443
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www.mb6696.onl:80
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www.mb6696.onl:443
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8i3WMsa122OI
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delay
3
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install
true
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install_file
ratmalware.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
- 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 1 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 1 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\310b8c55065e31334ca38e155c06bb8180c6c9bfee31230a67d761546af4212f.exe"C:\Users\Admin\AppData\Local\Temp\310b8c55065e31334ca38e155c06bb8180c6c9bfee31230a67d761546af4212f.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 "ratmalware" /tr '"C:\Users\Admin\AppData\Roaming\ratmalware.exe"' & exit2⤵
- Executes a command shell one-liner
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C:\Windows\SysWOW64\schtasks.exeschtasks /create /f /sc onlogon /rl highest /tn "ratmalware" /tr '"C:\Users\Admin\AppData\Roaming\ratmalware.exe"'3⤵
- 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\tmpBE84.tmp.bat""2⤵
- Executes a command shell one-liner
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C:\Windows\SysWOW64\timeout.exetimeout 33⤵
- Delays execution with timeout.exe
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C:\Users\Admin\AppData\Roaming\ratmalware.exe"C:\Users\Admin\AppData\Roaming\ratmalware.exe"3⤵
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C:\Users\Admin\AppData\Roaming\ratmalware.exe"C:\Users\Admin\AppData\Roaming\ratmalware.exe"1⤵
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
tmpBE84.tmp.bat
ratmalware.exe
memory/1752-12-0x00000000748F0000-0x00000000750AC000-memory.dmp
memory/1752-14-0x00000000748F0000-0x00000000750AC000-memory.dmp
memory/4816-0-0x0000000074A72000-0x0000000074A73000-memory.dmp
memory/4816-1-0x00000000004C0000-0x00000000004E2000-memory.dmp
memory/4816-2-0x0000000074A60000-0x000000007521C000-memory.dmp
memory/4816-3-0x0000000005130000-0x00000000051CC000-memory.dmp
memory/4816-8-0x0000000074A60000-0x000000007521C000-memory.dmp