Analysis
- max time kernel
149s - max time network
151s - platform
windows10-2004_x64 - resource
win10v2004-20240508-en - resource tags
- submitted
29/05/2024, 02:52
General
- Target 39a150550c203ceed145c316398651e550941e0364510b5a1534bed963eaa739.exe
- Size 1.9MB
- Sample240529-dc2zvsge48
- SHA256 39a150550c203ceed145c316398651e550941e0364510b5a1534bed963eaa739
Malware Config
Extracted
-
asyncrat
-
Default
-
allay.x3322.net:5050
-
gnrfjlujxmukjuvrs
-
delay
1
-
install
true
-
install_file
WriteFile.exe
-
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 2 IoCs
Looks up country code configured in the registry, likely geofence.
- Executes dropped EXE 2 IoCs
- UPX packed file 26 IoCs
Detects executables packed with UPX/modified UPX open source packer.
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Program crash 1 IoCs
- 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 32 IoCs
- Suspicious use of AdjustPrivilegeToken 2 IoCs
- Suspicious use of SetWindowsHookEx 4 IoCs
- Suspicious use of WriteProcessMemory 12 IoCs
- Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
Processes
-
C:\Users\Admin\AppData\Local\Temp\39a150550c203ceed145c316398651e550941e0364510b5a1534bed963eaa739.exe"C:\Users\Admin\AppData\Local\Temp\39a150550c203ceed145c316398651e550941e0364510b5a1534bed963eaa739.exe"1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
-
C:\Client.exe"C:\Client.exe"2⤵
- Checks computer location settings
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "WriteFile" /tr '"C:\Users\Admin\AppData\Roaming\WriteFile.exe"' & exit3⤵
- Suspicious use of WriteProcessMemory
-
C:\Windows\system32\schtasks.exeschtasks /create /f /sc onlogon /rl highest /tn "WriteFile" /tr '"C:\Users\Admin\AppData\Roaming\WriteFile.exe"'4⤵
- Creates scheduled task(s)
-
-
-
C:\Windows\system32\cmd.exeC:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpB556.tmp.bat""3⤵
- Suspicious use of WriteProcessMemory
-
C:\Windows\system32\timeout.exetimeout 34⤵
- Delays execution with timeout.exe
-
-
C:\Users\Admin\AppData\Roaming\WriteFile.exe"C:\Users\Admin\AppData\Roaming\WriteFile.exe"4⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
-
-
-
-
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 1780 -s 18522⤵
- Program crash
-
-
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 1780 -ip 17801⤵
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
Client.exe
tmpB556.tmp.bat
DataLogs.conf
memory/1780-10-0x0000000010000000-0x000000001003C000-memory.dmp
memory/1780-13-0x0000000010000000-0x000000001003C000-memory.dmp
memory/1780-42-0x0000000010000000-0x000000001003C000-memory.dmp
memory/1780-26-0x0000000010000000-0x000000001003C000-memory.dmp
memory/1780-1-0x0000000000CB0000-0x0000000000CBF000-memory.dmp
memory/1780-2-0x0000000010000000-0x000000001003C000-memory.dmp
memory/1780-46-0x0000000010000000-0x000000001003C000-memory.dmp
memory/1780-40-0x0000000010000000-0x000000001003C000-memory.dmp
memory/1780-38-0x0000000010000000-0x000000001003C000-memory.dmp
memory/1780-36-0x0000000010000000-0x000000001003C000-memory.dmp
memory/1780-34-0x0000000010000000-0x000000001003C000-memory.dmp
memory/1780-32-0x0000000010000000-0x000000001003C000-memory.dmp
memory/1780-30-0x0000000010000000-0x000000001003C000-memory.dmp
memory/1780-28-0x0000000010000000-0x000000001003C000-memory.dmp
memory/1780-44-0x0000000010000000-0x000000001003C000-memory.dmp
memory/1780-24-0x0000000010000000-0x000000001003C000-memory.dmp
memory/1780-8-0x0000000010000000-0x000000001003C000-memory.dmp
memory/1780-18-0x0000000010000000-0x000000001003C000-memory.dmp
memory/1780-16-0x0000000010000000-0x000000001003C000-memory.dmp
memory/1780-14-0x0000000010000000-0x000000001003C000-memory.dmp
memory/1780-22-0x0000000010000000-0x000000001003C000-memory.dmp
memory/1780-0-0x0000000068CD0000-0x0000000068CDF000-memory.dmp
memory/1780-20-0x0000000010000000-0x000000001003C000-memory.dmp
memory/1780-6-0x0000000010000000-0x000000001003C000-memory.dmp
memory/1780-4-0x0000000010000000-0x000000001003C000-memory.dmp
memory/1780-3-0x0000000010000000-0x000000001003C000-memory.dmp
memory/2896-60-0x00007FFE96180000-0x00007FFE96C41000-memory.dmp
memory/2896-65-0x00007FFE96180000-0x00007FFE96C41000-memory.dmp
memory/2896-58-0x00007FFE96183000-0x00007FFE96185000-memory.dmp
memory/2896-57-0x0000000000D40000-0x0000000000D58000-memory.dmp