Analysis
- user interaction
yes - max time kernel
33s - max time network
146s - platform
windows11-ltsc_2024_x64 - resource
win11ltsc2024-20260709-en - resource tags
- submitted
02/08/2026, 19:34
General
- Target Vc Redmist steup.exe
- Size 523KB
- Sample260802-x97fdsfj7t
- SHA256 8754bcc96e84431f40394affdd9b71a06879036ce93aaf05e6b0f754e50ba820
Malware Config
Extracted
-
quasar
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3.1.5
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Office04
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rat.ethanremote.co.uk:443
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$Sxr-BSS0oNqU5nWv8vBZ8I
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encryption_key
JlX01yUyffjrDJd5RKIV
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install_name
subDirsystem.exe
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key_salt
bfeb1e56fbcd973bb219022430a57843003d5644d21e62b9d4f180e7e6c33941
-
log_directory
Logs
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reconnect_delay
3000
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startup_key
Windows BootManger
-
subdirectory
SubDir
Signatures
- Family: Quasar RAT
Quasar is an open source Remote Access Tool.
- Quasar payload 2 IoCs
- Command and Scripting Interpreter: PowerShell 1 TTPs 10 IoCs
Run Powershell and hide display window.
- Drops file in Drivers directory 1 IoCs
- Executes dropped EXE 3 IoCs
- Looks up external IP address via web service 1 TTPs 3 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
- 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.
- Gathers network information 2 TTPs 5 IoCs
Uses commandline utility to view network configuration.
- Scheduled Task/Job: Scheduled Task 1 TTPs 7 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
- Suspicious behavior: EnumeratesProcesses 2 IoCs
- Suspicious use of AdjustPrivilegeToken 2 IoCs
- Suspicious use of WriteProcessMemory 5 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\Vc Redmist steup.exe"C:\Users\Admin\AppData\Local\Temp\Vc Redmist steup.exe"1⤵
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\C0e58eb4500000afc.exe"C0e58eb4500000afc.exe"2⤵
- Drops file in Drivers directory
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\schtasks.exe"schtasks" /create /tn "Windows BootManger" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\C0e58eb4500000afc.exe" /rl HIGHEST /f3⤵
- System Location Discovery: System Language Discovery
- Scheduled Task/Job: Scheduled Task
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C:\Users\Admin\AppData\Roaming\SubDir\subDirsystem.exe"C:\Users\Admin\AppData\Roaming\SubDir\subDirsystem.exe"3⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
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C:\Windows\SysWOW64\schtasks.exe"schtasks" /create /tn "Windows BootManger" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\subDirsystem.exe" /rl HIGHEST /f4⤵
- Scheduled Task/Job: Scheduled Task
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-
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C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe"powershell.exe" -WindowStyle Hidden -Command "Add-MpPreference -ExclusionPath (Get-Item -LiteralPath $env:SystemRoot).Root"3⤵
- Command and Scripting Interpreter: PowerShell
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\SysWOW64\ipconfig.exe"C:\Windows\System32\ipconfig.exe" /flushdns3⤵
- System Location Discovery: System Language Discovery
- Gathers network information
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C:\Windows\SysWOW64\SCHTASKS.exe"SCHTASKS.exe" /create /tn "$77C0e58eb4500000afc.exe" /tr "'C:\Users\Admin\AppData\Local\Temp\C0e58eb4500000afc.exe'" /sc onlogon /rl HIGHEST3⤵
- Scheduled Task/Job: Scheduled Task
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-
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C:\Users\Admin\AppData\Local\Temp\C0e58eb4500000afc.exeC:\Users\Admin\AppData\Local\Temp\C0e58eb4500000afc.exe1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
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C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe"powershell.exe" -WindowStyle Hidden -Command "Add-MpPreference -ExclusionPath (Get-Item -LiteralPath $env:SystemRoot).Root"2⤵
- Command and Scripting Interpreter: PowerShell
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C:\Windows\SysWOW64\ipconfig.exe"C:\Windows\System32\ipconfig.exe" /flushdns2⤵
- Gathers network information
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C:\Windows\SysWOW64\SCHTASKS.exe"SCHTASKS.exe" /create /tn "$77C0e58eb4500000afc.exe" /tr "'C:\Users\Admin\AppData\Local\Temp\C0e58eb4500000afc.exe'" /sc onlogon /rl HIGHEST2⤵
- Scheduled Task/Job: Scheduled Task
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C:\Users\Admin\AppData\Local\Temp\C0e58eb4500000afc.exe"C:\Users\Admin\AppData\Local\Temp\C0e58eb4500000afc.exe"1⤵
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C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe"powershell.exe" -WindowStyle Hidden -Command "Add-MpPreference -ExclusionPath (Get-Item -LiteralPath $env:SystemRoot).Root"2⤵
- Command and Scripting Interpreter: PowerShell
-
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C:\Windows\SysWOW64\ipconfig.exe"C:\Windows\System32\ipconfig.exe" /flushdns2⤵
- Gathers network information
-
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C:\Windows\SysWOW64\SCHTASKS.exe"SCHTASKS.exe" /create /tn "$77C0e58eb4500000afc.exe" /tr "'C:\Users\Admin\AppData\Local\Temp\C0e58eb4500000afc.exe'" /sc onlogon /rl HIGHEST2⤵
- Scheduled Task/Job: Scheduled Task
-
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C:\Users\Admin\AppData\Roaming\SubDir\subDirsystem.exeC:\Users\Admin\AppData\Roaming\SubDir\subDirsystem.exe1⤵
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C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe"powershell.exe" -WindowStyle Hidden -Command "Add-MpPreference -ExclusionPath (Get-Item -LiteralPath $env:SystemRoot).Root"2⤵
- Command and Scripting Interpreter: PowerShell
-
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C:\Windows\SysWOW64\ipconfig.exe"C:\Windows\System32\ipconfig.exe" /flushdns2⤵
- Gathers network information
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C:\Windows\SysWOW64\SCHTASKS.exe"SCHTASKS.exe" /create /tn "$77subDirsystem.exe" /tr "'C:\Users\Admin\AppData\Roaming\SubDir\subDirsystem.exe'" /sc onlogon /rl HIGHEST2⤵
- Scheduled Task/Job: Scheduled Task
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C:\Users\Admin\AppData\Roaming\SubDir\subDirsystem.exe"C:\Users\Admin\AppData\Roaming\SubDir\subDirsystem.exe"1⤵
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C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe"powershell.exe" -WindowStyle Hidden -Command "Add-MpPreference -ExclusionPath (Get-Item -LiteralPath $env:SystemRoot).Root"2⤵
- Command and Scripting Interpreter: PowerShell
-
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C:\Windows\SysWOW64\ipconfig.exe"C:\Windows\System32\ipconfig.exe" /flushdns2⤵
- Gathers network information
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C:\Windows\SysWOW64\SCHTASKS.exe"SCHTASKS.exe" /create /tn "$77subDirsystem.exe" /tr "'C:\Users\Admin\AppData\Roaming\SubDir\subDirsystem.exe'" /sc onlogon /rl HIGHEST2⤵
- Scheduled Task/Job: Scheduled Task
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Network
MITRE ATT&CK Enterprise v16
Execution
Command and Scripting Interpreter
2PowerShell
1Scheduled Task/Job
1Scheduled Task
1Replay Monitor
Loading Replay Monitor...
Downloads
StartupProfileData-NonInteractive
StartupProfileData-NonInteractive
StartupProfileData-NonInteractive
C0e58eb4500000afc.exe
__PSScriptPolicyTest_r0og4vpy.id0.ps1
hosts
hosts
hosts
hosts
memory/732-85-0x00000000705C0000-0x000000007060C000-memory.dmp
memory/1544-78-0x0000000007960000-0x0000000007A03000-memory.dmp
memory/1544-69-0x0000000006020000-0x000000000637B000-memory.dmp
memory/1544-73-0x0000000006B00000-0x0000000006B4C000-memory.dmp
memory/1544-75-0x00000000705C0000-0x000000007060C000-memory.dmp
memory/1864-55-0x000000006FB00000-0x000000006FB4C000-memory.dmp
memory/2364-50-0x00000000075C0000-0x00000000075CA000-memory.dmp
memory/2364-49-0x0000000008590000-0x0000000008C0C000-memory.dmp
memory/2364-46-0x000000006FB00000-0x000000006FB4C000-memory.dmp
memory/2456-37-0x00000000062F0000-0x000000000630A000-memory.dmp
memory/2456-23-0x0000000005090000-0x00000000050F6000-memory.dmp
memory/2456-28-0x0000000005DE0000-0x0000000005DFE000-memory.dmp
memory/2456-24-0x00000000058E0000-0x0000000005C3B000-memory.dmp
memory/2456-19-0x00000000028F0000-0x0000000002926000-memory.dmp
memory/2456-36-0x0000000006370000-0x0000000006406000-memory.dmp
memory/2456-22-0x0000000004FF0000-0x0000000005012000-memory.dmp
memory/2456-38-0x0000000006340000-0x0000000006362000-memory.dmp
memory/2456-40-0x0000000007140000-0x0000000007176000-memory.dmp
memory/2456-41-0x000000006FB00000-0x000000006FB4C000-memory.dmp
memory/2456-29-0x0000000005FE0000-0x000000000602C000-memory.dmp
memory/2456-44-0x0000000007120000-0x0000000007140000-memory.dmp
memory/2456-45-0x0000000007180000-0x0000000007223000-memory.dmp
memory/2456-21-0x0000000005160000-0x00000000057AA000-memory.dmp
memory/2812-35-0x00007FF659BE0000-0x00007FF659C6B000-memory.dmp
memory/2812-11-0x00007FF659BE0000-0x00007FF659C6B000-memory.dmp
memory/3748-20-0x0000000074AC0000-0x000000007527C000-memory.dmp
memory/3748-65-0x0000000006D70000-0x0000000006D7A000-memory.dmp
memory/3748-58-0x0000000074AC0000-0x000000007527C000-memory.dmp
memory/3748-18-0x0000000074AC0000-0x000000007527C000-memory.dmp
memory/5308-10-0x0000000005F40000-0x0000000005F52000-memory.dmp
memory/5308-13-0x0000000074AC0000-0x000000007527C000-memory.dmp
memory/5308-12-0x0000000074AD2000-0x0000000074AD3000-memory.dmp
memory/5308-34-0x0000000074AC0000-0x000000007527C000-memory.dmp
memory/5308-9-0x0000000005A90000-0x0000000005AF6000-memory.dmp
memory/5308-8-0x0000000074AC0000-0x000000007527C000-memory.dmp
memory/5308-7-0x00000000059F0000-0x0000000005A82000-memory.dmp
memory/5308-6-0x0000000005FB0000-0x000000000656A000-memory.dmp
memory/5308-5-0x0000000000E20000-0x0000000000E96000-memory.dmp
memory/5308-4-0x0000000074AD2000-0x0000000074AD3000-memory.dmp