Analysis
- max time kernel
148s - max time network
148s - platform
windows11-ltsc_2024_x64 - resource
win11ltsc2024-20260911-en - resource tags
- submitted
13/09/2026, 19:28
General
- Target fb88.exe
- Size 49KB
- Sample260913-x66dxsseqb
- SHA256 45db0161258588e66f50af238810c9e7faf62397a5679706848a06697c461363
Malware Config
Extracted
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asyncrat
-
0.5.8
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Default
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qotiviki.co:443
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qotiviki.co:8888
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undertheblood.net:443
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undertheblood.net:8888
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FH8w8vMMk1kV
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delay
3
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install
true
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install_file
fb88.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 29 IoCs
- Suspicious use of AdjustPrivilegeToken 1 IoCs
- Suspicious use of WriteProcessMemory 5 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\fb88.exe"C:\Users\Admin\AppData\Local\Temp\fb88.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 "fb88" /tr '"C:\Users\Admin\AppData\Roaming\fb88.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 "fb88" /tr '"C:\Users\Admin\AppData\Roaming\fb88.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\tmp92EF.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\fb88.exe"C:\Users\Admin\AppData\Roaming\fb88.exe"3⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
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-
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C:\Users\Admin\AppData\Roaming\fb88.exe"C:\Users\Admin\AppData\Roaming\fb88.exe"1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
tmp92EF.tmp.bat
fb88.exe
memory/3524-0-0x0000000074A02000-0x0000000074A03000-memory.dmp
memory/3524-1-0x0000000000370000-0x0000000000382000-memory.dmp
memory/3524-2-0x00000000749F0000-0x00000000751AC000-memory.dmp
memory/3524-3-0x0000000004F90000-0x0000000004FF6000-memory.dmp
memory/3524-4-0x0000000005350000-0x00000000053EC000-memory.dmp
memory/3524-10-0x00000000749F0000-0x00000000751AC000-memory.dmp
memory/5328-13-0x00000000749F0000-0x00000000751AC000-memory.dmp
memory/5328-15-0x00000000749F0000-0x00000000751AC000-memory.dmp