Analysis
- max time kernel
149s - max time network
150s - platform
windows10-2004_x64 - resource
win10v2004-20260513-en - resource tags
- submitted
30/07/2026, 20:15
General
- Target ITRIntimation24-25.vbs
- Size 4.3MB
- Sample260730-y12dfsfa29
- SHA256 b7330cf42457ba3a1cb515d260f2fb3f4dd90e4de9cf26fd6b070cf53109df6d
Malware Config
Extracted
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asyncrat
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AWS | 3Losh
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MAJOR RED
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64.89.163.114:6606
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prakashjadhav7473.duckdns.org:6606
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AsyncMutex_alosh
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delay
3
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install
false
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install_folder
%AppData%
Signatures
- Family: AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
- Family: DonutLoader
DonutLoader is a position-independent code that enables in-memory execution of VBScript, JScript, EXE, DLL files and dotNET assemblies.
- Suricata alert: AsyncRAT Malware Default X.509 Certificate Detected - Inbound 2 IoCs
Network activity triggered a Suricata alert
- Async RAT payload 2 IoCs
- Detects DonutLoader 1 IoCs
- Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs
Using powershell.exe command.
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- Executes dropped EXE 2 IoCs
- Adds Run key to start application 2 TTPs 1 IoCs
- Indicator Removal: File Deletion 1 TTPs
Adversaries may delete files left behind by the actions of their intrusion activity.
- Executes a VBScript file via the Windows Script Host. 1 TTPs 1 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Executes a command shell one-liner 1 TTPs 1 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 4 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
- Modifies registry key 1 TTPs 1 IoCs
- Suspicious behavior: EnumeratesProcesses 5 IoCs
- Suspicious use of AdjustPrivilegeToken 3 IoCs
- Suspicious use of SetWindowsHookEx 1 IoCs
- Suspicious use of WriteProcessMemory 9 IoCs
Processes
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C:\Windows\System32\WScript.exe"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\ITRIntimation24-25.vbs"1⤵
- Checks computer location settings
- Executes a VBScript file via the Windows Script Host.
- Suspicious use of WriteProcessMemory
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C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -NoProfile -ExecutionPolicy Bypass -Command "$b64=[IO.File]::ReadAllText('C:\Temp\yellow.b64');$raw=[Text.Encoding]::UTF8.GetString([Convert]::FromBase64String($b64));[IO.File]::WriteAllBytes('C:\Temp\yellow.bat',[Convert]::FromBase64String($raw));Remove-Item 'C:\Temp\yellow.b64'"2⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\system32\cmd.exeC:\Windows\system32\cmd.exe /c ""C:\Temp\yellow.bat" "2⤵
- Executes a command shell one-liner
- Suspicious use of WriteProcessMemory
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C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exepowershell -w hidden -exec bypass -F "C:\Temp\update.ps1"3⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\reg.exe"C:\Windows\system32\reg.exe" add HKCU\Software\Microsoft\Windows\CurrentVersion\Run /v nrklnm /t REG_SZ /d "\"C:\Users\Admin\AppData\Roaming\SetupFiles\vijewyufveonabghulluonouceyasi.exe\" \"C:\Users\Admin\AppData\Roaming\SetupFiles\wwmaw\"" /f4⤵
- Adds Run key to start application
- Modifies registry key
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C:\Users\Admin\AppData\Roaming\SetupFiles\vijewyufveonabghulluonouceyasi.exe"C:\Users\Admin\AppData\Roaming\SetupFiles\vijewyufveonabghulluonouceyasi.exe" C:\Users\Admin\AppData\Roaming\SetupFiles\wwmaw4⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\charmap.exeC:\Windows\Syswow64\charmap.exe5⤵
- Suricata alert: AsyncRAT Malware Default X.509 Certificate Detected - Inbound
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
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C:\Users\Admin\AppData\Roaming\SetupFiles\vijewyufveonabghulluonouceyasi.exe"C:\Users\Admin\AppData\Roaming\SetupFiles\vijewyufveonabghulluonouceyasi.exe" "C:\Users\Admin\AppData\Roaming\SetupFiles\wwmaw"1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\charmap.exeC:\Windows\Syswow64\charmap.exe2⤵
- System Location Discovery: System Language Discovery
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Network
MITRE ATT&CK Enterprise v16
Execution
Command and Scripting Interpreter
3PowerShell
1Visual Basic
1Windows Command Shell
1Privilege Escalation
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Replay Monitor
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Downloads
yellow.b64
yellow.bat
powershell.exe.log
StartupProfileData-NonInteractive
__PSScriptPolicyTest_bbrxpcm4.wvr.ps1
Ennnn
vijewyufveonabghulluonouceyasi.exe
wwmaw
memory/8-3-0x000001F6A64E0000-0x000001F6A6502000-memory.dmp
memory/8-1-0x000001F6A5C20000-0x000001F6A5C30000-memory.dmp
memory/8-2-0x000001F6A5C20000-0x000001F6A5C30000-memory.dmp
memory/2024-46-0x0000000000480000-0x0000000000498000-memory.dmp
memory/2024-48-0x0000000004A40000-0x0000000004A56000-memory.dmp
memory/2024-52-0x0000000006A40000-0x0000000006FE4000-memory.dmp
memory/2024-53-0x0000000006630000-0x00000000066C2000-memory.dmp
memory/2024-54-0x0000000005100000-0x000000000510A000-memory.dmp
memory/2024-55-0x0000000007130000-0x00000000071CC000-memory.dmp
memory/2024-56-0x00000000071D0000-0x0000000007236000-memory.dmp
memory/3384-49-0x00000000051F0000-0x0000000005206000-memory.dmp