Analysis
- max time kernel
148s - max time network
124s - platform
windows11-ltsc_2024_x64 - resource
win11ltsc2024-20260709-en - resource tags
- submitted
30/07/2026, 10:21
General
- Target usdfnsbdmf.exe
- Size 45KB
- Sample260730-md4draff97
- SHA256 0a502b8dbe4bd4682e8adfd38cf023aad558dae0d8008d9e69cb5dcfcbe8daa4
Malware Config
Extracted
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asyncrat
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0.5.8
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Admin
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toparenaslot.co/vi-vn/:80
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toparenaslot.co/vi-vn/:443
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toparenaslot.co/vi-vn/:7788
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toparenaslot.co/vi-vn/:7879
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toparenaslot.co/vi-vn/:3577
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toparenaslot.co/:80
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toparenaslot.co/:443
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toparenaslot.co/:7788
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toparenaslot.co/:7879
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toparenaslot.co/:3577
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www.toparenaslot.co/:80
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www.toparenaslot.co/:443
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www.toparenaslot.co/:7788
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www.toparenaslot.co/:7879
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www.toparenaslot.co/:3577
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ZVlCDYnxeRiA
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delay
3
-
install
true
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install_file
usdfnsbdmf.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\usdfnsbdmf.exe"C:\Users\Admin\AppData\Local\Temp\usdfnsbdmf.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 "usdfnsbdmf" /tr '"C:\Users\Admin\AppData\Roaming\usdfnsbdmf.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 "usdfnsbdmf" /tr '"C:\Users\Admin\AppData\Roaming\usdfnsbdmf.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\tmp10BF.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\usdfnsbdmf.exe"C:\Users\Admin\AppData\Roaming\usdfnsbdmf.exe"3⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
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-
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C:\Users\Admin\AppData\Roaming\usdfnsbdmf.exe"C:\Users\Admin\AppData\Roaming\usdfnsbdmf.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
tmp10BF.tmp.bat
usdfnsbdmf.exe
memory/3368-12-0x0000000074980000-0x000000007513C000-memory.dmp
memory/3368-14-0x0000000074980000-0x000000007513C000-memory.dmp
memory/3620-0-0x00000000749F2000-0x00000000749F3000-memory.dmp
memory/3620-1-0x00000000009B0000-0x00000000009C2000-memory.dmp
memory/3620-2-0x00000000749E0000-0x000000007519C000-memory.dmp
memory/3620-3-0x00000000054C0000-0x000000000555C000-memory.dmp
memory/3620-9-0x00000000749E0000-0x000000007519C000-memory.dmp