Analysis
- user interaction
yes - max time kernel
149s - max time network
150s - platform
windows10-2004_x64 - resource
win10v2004-20260513-en - resource tags
- submitted
22/08/2026, 20:30
General
- Target Client-built.exe
- Size 3.1MB
- Sample260822-y985nayfpc
- SHA256 d2317bf0d1173c02fdaf306b1c1fda3b89b61577a1f7a16487b54a48083a07d0
Malware Config
Extracted
-
quasar
-
1.4.1
-
Xeno
-
blueyapollo-62950.portmap.host:62950
-
86aae3b9-9c66-430d-973e-723a333356ab
-
encryption_key
09CF8070CBCAC69A8BB15C38FE474821E9EF8C1F
-
install_name
bootstrappernew.exe
-
key_salt
bfeb1e56fbcd973bb219022430a57843003d5644d21e62b9d4f180e7e6c33941
-
log_directory
system
-
reconnect_delay
3000
-
startup_key
System Host Process
-
subdirectory
SubDir
Signatures
- Family: Quasar RAT
Quasar is an open source Remote Access Tool.
- Quasar payload 2 IoCs
- Executes dropped EXE 2 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
- Suspicious behavior: EnumeratesProcesses 1 IoCs
- Suspicious use of AdjustPrivilegeToken 3 IoCs
- Suspicious use of FindShellTrayWindow 4 IoCs
- Suspicious use of SendNotifyMessage 4 IoCs
- Suspicious use of SetWindowsHookEx 1 IoCs
- Suspicious use of WriteProcessMemory 3 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\Client-built.exe"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "System Host Process" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\bootstrappernew.exe" /rl HIGHEST /f2⤵
- Scheduled Task/Job: Scheduled Task
-
-
C:\Users\Admin\AppData\Roaming\SubDir\bootstrappernew.exe"C:\Users\Admin\AppData\Roaming\SubDir\bootstrappernew.exe"2⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
-
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "System Host Process" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\bootstrappernew.exe" /rl HIGHEST /f3⤵
- Scheduled Task/Job: Scheduled Task
-
-
-
C:\Users\Admin\AppData\Roaming\SubDir\bootstrappernew.exeC:\Users\Admin\AppData\Roaming\SubDir\bootstrappernew.exe1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
bootstrappernew.exe
memory/3728-0-0x0000000000B80000-0x0000000000EA4000-memory.dmp
memory/3728-1-0x000000001BCD0000-0x000000001BCE0000-memory.dmp
memory/3988-8-0x0000000002DB0000-0x0000000002DC0000-memory.dmp
memory/3988-11-0x000000001D090000-0x000000001D0E0000-memory.dmp
memory/3988-12-0x000000001D1A0000-0x000000001D252000-memory.dmp
memory/3988-13-0x0000000002DB0000-0x0000000002DC0000-memory.dmp
memory/3988-14-0x000000001D110000-0x000000001D122000-memory.dmp
memory/3988-15-0x000000001DAA0000-0x000000001DADC000-memory.dmp
memory/3988-16-0x000000001E510000-0x000000001EA38000-memory.dmp