Analysis
- max time kernel
148s - max time network
153s - platform
windows11-ltsc_2024_x64 - resource
win11ltsc2024-20260709-en - resource tags
- submitted
21/07/2026, 13:40
General
- Target 81dacdc4741b649383df7cd2e28dcc266788fecf5727732dede4462d6e4e91b7.exe
- Size 45KB
- Sample260721-qyn2caad66
- SHA256 81dacdc4741b649383df7cd2e28dcc266788fecf5727732dede4462d6e4e91b7
Malware Config
Extracted
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asyncrat
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0.5.8
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Default
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103.109.100.136:80
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103.109.100.136:22
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103.109.100.136:8080
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103.109.100.136:8880
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103.109.100.136:2052
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103.109.100.136:2082
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103.109.100.136:2086
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103.109.100.136:2095
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103.109.100.136:443
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103.109.100.136:2053
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103.109.100.136:2083
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103.109.100.136:2087
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103.109.100.136:2096
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103.109.100.136:8443
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ZfHsTzg6yMbT
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delay
0
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install
true
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install_file
sfmru3k.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\81dacdc4741b649383df7cd2e28dcc266788fecf5727732dede4462d6e4e91b7.exe"C:\Users\Admin\AppData\Local\Temp\81dacdc4741b649383df7cd2e28dcc266788fecf5727732dede4462d6e4e91b7.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 "sfmru3k" /tr '"C:\Users\Admin\AppData\Roaming\sfmru3k.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 "sfmru3k" /tr '"C:\Users\Admin\AppData\Roaming\sfmru3k.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\tmpFDD3.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\sfmru3k.exe"C:\Users\Admin\AppData\Roaming\sfmru3k.exe"3⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
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-
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C:\Users\Admin\AppData\Roaming\sfmru3k.exe"C:\Users\Admin\AppData\Roaming\sfmru3k.exe"1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
tmpFDD3.tmp.bat
sfmru3k.exe
memory/4224-0-0x00000000751E2000-0x00000000751E3000-memory.dmp
memory/4224-1-0x00000000003E0000-0x00000000003F2000-memory.dmp
memory/4224-2-0x00000000751D0000-0x000000007598C000-memory.dmp
memory/4224-3-0x0000000004F10000-0x0000000004FAC000-memory.dmp
memory/4224-8-0x00000000751D0000-0x000000007598C000-memory.dmp
memory/5544-12-0x00000000751D0000-0x000000007598C000-memory.dmp
memory/5544-14-0x00000000751D0000-0x000000007598C000-memory.dmp