Analysis
- max time kernel
145s - max time network
172s - platform
windows10-2004_x64 - resource
win10v2004-20240226-en - resource tags
- submitted
04/04/2024, 01:29
General
- Target 5732891fc200a9a59fdf3b2f96d5977152d1b76eb7220c8fcb28fc476945cddc.exe
- Size 66KB
- Sample240404-bwemkabb65
- SHA256 5732891fc200a9a59fdf3b2f96d5977152d1b76eb7220c8fcb28fc476945cddc
Malware Config
Extracted
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asyncrat
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| Edit 3LOSH RAT
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RAT15
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darkstorm275991.ddns.net:6606
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darkstorm275991.ddns.net:7707
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darkstorm275991.ddns.net:8808
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mrreport.duckdns.org:6606
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mrreport.duckdns.org:7707
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mrreport.duckdns.org:8808
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AsyncMutex_6SI8OkPnk
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delay
3
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install
true
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install_file
Windows Session Manager.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
- Detect binaries embedding considerable number of cryptocurrency wallet browser extension IDs. 2 IoCs
- Detects file containing reversed ASEP Autorun registry keys 3 IoCs
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- Executes dropped EXE 1 IoCs
- Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
- Delays execution with timeout.exe 1 IoCs
- Suspicious behavior: EnumeratesProcesses 24 IoCs
- Suspicious use of AdjustPrivilegeToken 2 IoCs
- Suspicious use of SetWindowsHookEx 1 IoCs
- Suspicious use of WriteProcessMemory 15 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\5732891fc200a9a59fdf3b2f96d5977152d1b76eb7220c8fcb28fc476945cddc.exe"C:\Users\Admin\AppData\Local\Temp\5732891fc200a9a59fdf3b2f96d5977152d1b76eb7220c8fcb28fc476945cddc.exe"1⤵
- Checks computer location settings
- 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 "Windows Session Manager" /tr '"C:\Users\Admin\AppData\Roaming\Windows Session Manager.exe"' & exit2⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\schtasks.exeschtasks /create /f /sc onlogon /rl highest /tn "Windows Session Manager" /tr '"C:\Users\Admin\AppData\Roaming\Windows Session Manager.exe"'3⤵
- Creates scheduled task(s)
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C:\Windows\SysWOW64\cmd.exeC:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpC1C9.tmp.bat""2⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\timeout.exetimeout 33⤵
- Delays execution with timeout.exe
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C:\Users\Admin\AppData\Roaming\Windows Session Manager.exe"C:\Users\Admin\AppData\Roaming\Windows Session Manager.exe"3⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
tmpC1C9.tmp.bat
Windows Session Manager.exe
memory/4040-3-0x00000000059B0000-0x0000000005A4C000-memory.dmp
memory/4040-0-0x0000000000C70000-0x0000000000C86000-memory.dmp
memory/4040-8-0x0000000074880000-0x0000000075030000-memory.dmp
memory/4040-2-0x0000000005700000-0x0000000005710000-memory.dmp
memory/4040-1-0x0000000074880000-0x0000000075030000-memory.dmp
memory/4908-13-0x00000000747D0000-0x0000000074F80000-memory.dmp
memory/4908-14-0x0000000004B00000-0x0000000004B10000-memory.dmp
memory/4908-15-0x0000000005500000-0x0000000005AA4000-memory.dmp
memory/4908-16-0x00000000050F0000-0x0000000005182000-memory.dmp
memory/4908-17-0x0000000005080000-0x000000000508A000-memory.dmp
memory/4908-20-0x0000000005D20000-0x0000000005D86000-memory.dmp
memory/4908-21-0x00000000747D0000-0x0000000074F80000-memory.dmp
memory/4908-22-0x0000000004B00000-0x0000000004B10000-memory.dmp