Analysis
- max time kernel
149s - max time network
150s - platform
windows11-21h2_x64 - resource
win11-20260130-en - resource tags
- submitted
11/05/2026, 12:29
General
- Target AsyncClient_phaixemsex_net_HjuGFUXQ.exe
- Size 45KB
- Sample260511-pn91dsds4j
- SHA256 0c604e6ac5659ba1b31e53f949fd350568026455e49a784b746996798476c2be
Score
10/10
Malware Config
Extracted
Family
-
asyncrat
Version
-
0.5.8
Botnet
-
Default
C2
-
phaixemsex.net:443
-
www.phaixemsex.net:443
Mutex
-
FRV5OP3bsTBr
Attributes
-
delay
0
-
install
true
-
install_file
AsyncClient.exe
-
install_folder
%AppData%
aes.plain
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).
- 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 19 IoCs
- Suspicious use of AdjustPrivilegeToken 2 IoCs
- Suspicious use of WriteProcessMemory 5 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\AsyncClient_phaixemsex_net_HjuGFUXQ.exe"C:\Users\Admin\AppData\Local\Temp\AsyncClient_phaixemsex_net_HjuGFUXQ.exe"1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
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
-
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
-
-
-
C:\Windows\SysWOW64\cmd.exeC:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpF879.tmp.bat""2⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\timeout.exetimeout 33⤵
- System Location Discovery: System Language Discovery
- Delays execution with timeout.exe
-
-
C:\Users\Admin\AppData\Roaming\AsyncClient.exe"C:\Users\Admin\AppData\Roaming\AsyncClient.exe"3⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
-
-
-
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
tmpF879.tmp.bat
AsyncClient.exe
memory/4340-0-0x0000000000D30000-0x0000000000D42000-memory.dmp
memory/4340-1-0x0000000005810000-0x0000000005820000-memory.dmp
memory/4340-2-0x0000000005820000-0x00000000058BC000-memory.dmp
memory/5028-12-0x00000000057A0000-0x00000000057AA000-memory.dmp