Analysis
- max time kernel
148s - max time network
146s - platform
windows11-ltsc_2024_x64 - resource
win11ltsc2024-20260709-en - resource tags
- submitted
10/09/2026, 23:13
General
- Target AsyncClient.exe
- Size 45KB
- Sample260910-27f8msy1cw
- SHA256 21f72a4b8e1326b6eaec4c25c6bb2efd418e4efa64affe823ba65391db75a68a
Malware Config
Extracted
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asyncrat
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0.5.8
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Default
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business-club.co:6606
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business-club.co:7707
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business-club.co:8808
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business-club.co:8080
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business-club.co:80
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business-club.co:443
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business-club.co:8443
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98win688.com:6606
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98win688.com:7707
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98win688.com:8808
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98win688.com:8080
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98win688.com:80
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98win688.com:443
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98win688.com:8443
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KrfQPlnmWc8w
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delay
3
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install
true
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install_file
ChromeUpdate.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\AsyncClient.exe"C:\Users\Admin\AppData\Local\Temp\AsyncClient.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 "ChromeUpdate" /tr '"C:\Users\Admin\AppData\Roaming\ChromeUpdate.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 "ChromeUpdate" /tr '"C:\Users\Admin\AppData\Roaming\ChromeUpdate.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\tmp7FB5.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\ChromeUpdate.exe"C:\Users\Admin\AppData\Roaming\ChromeUpdate.exe"3⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
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C:\Users\Admin\AppData\Roaming\ChromeUpdate.exe"C:\Users\Admin\AppData\Roaming\ChromeUpdate.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
tmp7FB5.tmp.bat
ChromeUpdate.exe
memory/1912-12-0x0000000074F60000-0x000000007571C000-memory.dmp
memory/1912-14-0x0000000074F60000-0x000000007571C000-memory.dmp
memory/2104-0-0x0000000074F72000-0x0000000074F73000-memory.dmp
memory/2104-1-0x0000000000620000-0x0000000000632000-memory.dmp
memory/2104-2-0x0000000074F60000-0x000000007571C000-memory.dmp
memory/2104-3-0x0000000005000000-0x000000000509C000-memory.dmp
memory/2104-9-0x0000000074F60000-0x000000007571C000-memory.dmp