Analysis
- max time kernel
148s - max time network
155s - platform
windows10-2004_x64 - resource
win10v2004-20240709-en - resource tags
- submitted
29/07/2024, 13:00
General
- Target 556407eba4cd85a57fdb6dcdb12e2269.exe
- Size 45KB
- Sample240729-p8m2cstdqb
- SHA256 0f07d465b2fb93b367ff2a393574f87b932e4627591091bf8f2f94d3c8e75715
Malware Config
Extracted
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asyncrat
-
0.5.8
-
Default
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193.23.160.13:7707
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zTAsGorHPqSl
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delay
3
-
install
true
-
install_file
Server-Host.exe
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install_folder
%AppData%
Signatures
- AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
- Async RAT payload 1 IoCs
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- Executes dropped EXE 1 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- System Location Discovery: System Language Discovery 1 TTPs 6 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 23 IoCs
- Suspicious use of AdjustPrivilegeToken 3 IoCs
- Suspicious use of WriteProcessMemory 15 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\556407eba4cd85a57fdb6dcdb12e2269.exe"C:\Users\Admin\AppData\Local\Temp\556407eba4cd85a57fdb6dcdb12e2269.exe"1⤵
- Checks computer location settings
- 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 "Server-Host" /tr '"C:\Users\Admin\AppData\Roaming\Server-Host.exe"' & exit2⤵
- 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 "Server-Host" /tr '"C:\Users\Admin\AppData\Roaming\Server-Host.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\tmpBC1C.tmp.bat""2⤵
- 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\Server-Host.exe"C:\Users\Admin\AppData\Roaming\Server-Host.exe"3⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
tmpBC1C.tmp.bat
Server-Host.exe
memory/2488-14-0x0000000075090000-0x0000000075840000-memory.dmp
memory/2488-17-0x0000000006160000-0x0000000006704000-memory.dmp
memory/2488-18-0x0000000075090000-0x0000000075840000-memory.dmp
memory/3056-0-0x000000007509E000-0x000000007509F000-memory.dmp
memory/3056-1-0x0000000000230000-0x0000000000242000-memory.dmp
memory/3056-2-0x0000000075090000-0x0000000075840000-memory.dmp
memory/3056-3-0x0000000004BF0000-0x0000000004C56000-memory.dmp
memory/3056-4-0x0000000005080000-0x000000000511C000-memory.dmp
memory/3056-10-0x0000000075090000-0x0000000075840000-memory.dmp