Analysis
- max time kernel
149s - max time network
153s - platform
windows11-21h2_x64 - resource
win11-20260513-en - resource tags
- submitted
19/05/2026, 08:46
General
- Target test-main/file.ps1
- Size 7KB
- Sample260519-kpsehsdt5j
- SHA256 e0052de5a9673f74be5a49fe13cae9b16b6f271972901b17236090667bb53d31
Malware Config
Extracted
-
quasar
-
1.4.1
-
Office04
-
192.168.56.1:4040
-
5bd7ca94-097d-4205-a10e-717acbfbcbd5
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encryption_key
A92F43739E112EA9AA3F4913FA647C65F0CFDA2C
-
install_name
Client.exe
-
key_salt
bfeb1e56fbcd973bb219022430a57843003d5644d21e62b9d4f180e7e6c33941
-
log_directory
Logs
-
reconnect_delay
3000
-
startup_key
Quasar Client Startup
-
subdirectory
SubDir
Signatures
- Family: DonutLoader
DonutLoader is a position-independent code that enables in-memory execution of VBScript, JScript, EXE, DLL files and dotNET assemblies.
- Family: Quasar RAT
Quasar is an open source Remote Access Tool.
- Detects DonutLoader 1 IoCs
- Quasar payload 1 IoCs
- Badlisted process makes network request 2 IoCs
Network request originating from process or tool commonly abused by malware.
- Contacts third-party web service commonly abused for C2 1 TTPs 2 IoCs
Legitimate web (hosting) services can be abused by malware authors to host malware or C2s.
- Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs
Using powershell.exe command.
- System Location Discovery: System Language Discovery 1 TTPs 1 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
- Suspicious behavior: EnumeratesProcesses 2 IoCs
- Suspicious use of AdjustPrivilegeToken 2 IoCs
- Suspicious use of FindShellTrayWindow 1 IoCs
- Suspicious use of SendNotifyMessage 1 IoCs
- Suspicious use of WriteProcessMemory 4 IoCs
Processes
-
C:\Windows\system32\WindowsPowerShell\v1.0\PowerShell.exepowershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\test-main\file.ps11⤵
- Badlisted process makes network request
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe"C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe" /noconfig /fullpaths @"C:\Users\Admin\AppData\Local\Temp\wvso5yiv\wvso5yiv.cmdline"2⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exeC:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\Admin\AppData\Local\Temp\RES83D1.tmp" "c:\Users\Admin\AppData\Local\Temp\wvso5yiv\CSCD67FD8607BA64E7EA5B538604E6D73D3.TMP"3⤵
-
-
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C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exeC:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe2⤵
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
-
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
RES83D1.tmp
__PSScriptPolicyTest_kpcdkomz.k5m.ps1
wvso5yiv.dll
CSCD67FD8607BA64E7EA5B538604E6D73D3.TMP
wvso5yiv.0.cs
wvso5yiv.cmdline
memory/988-26-0x00000000057E0000-0x0000000005B04000-memory.dmp
memory/988-23-0x00000000005B0000-0x00000000008D6000-memory.dmp
memory/988-27-0x00000000060B0000-0x0000000006656000-memory.dmp
memory/988-28-0x0000000005550000-0x00000000055E2000-memory.dmp
memory/988-29-0x0000000005540000-0x000000000554A000-memory.dmp
memory/988-30-0x0000000006C80000-0x0000000007298000-memory.dmp
memory/988-31-0x0000000005EA0000-0x0000000005EF0000-memory.dmp
memory/988-32-0x0000000006720000-0x00000000067D2000-memory.dmp
memory/3412-9-0x000001B86C010000-0x000001B86C020000-memory.dmp
memory/3412-7-0x000001B86E190000-0x000001B86E1B2000-memory.dmp
memory/3412-0-0x000001B86C010000-0x000001B86C020000-memory.dmp
memory/3412-22-0x000001B86BFC0000-0x000001B86BFC8000-memory.dmp
memory/3412-1-0x000001B86C010000-0x000001B86C020000-memory.dmp