Analysis
- max time kernel
149s - max time network
96s - platform
windows11-21h2_x64 - resource
win11-20260130-en - resource tags
- submitted
15/04/2026, 23:32
General
- Target client.exe
- Size 3.1MB
- Sample260415-3jgd6set6v
- SHA256 fce9cb222586bcd4d19cb110c907ba2af019178a0f07aa887229bec748597a5b
Malware Config
Extracted
-
quasar
-
15.4.1
-
SeroXen
-
127.0.0.1:1414
-
43778e33-6e95-4120-85f8-de7b6beca9a7
-
encryption_key
634E580A85C375140B9A7F5972559DFD4F02033D
-
install_name
sxr.exe
-
key_salt
bfeb1e56fbcd973bb219022430a57843003d5644d21e62b9d4f180e7e6c33941
-
log_directory
$sxr-Logs
-
reconnect_delay
3000
-
startup_key
$sxr-seroxen
-
subdirectory
$sxr-seroxen1
Signatures
- Family: Quasar RAT
Quasar is an open source Remote Access Tool.
- Quasar payload 2 IoCs
- Executes dropped EXE 2 IoCs
- Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
- Suspicious use of AdjustPrivilegeToken 3 IoCs
- Suspicious use of SetWindowsHookEx 1 IoCs
- Suspicious use of WriteProcessMemory 3 IoCs
- Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
Processes
-
C:\Users\Admin\AppData\Local\Temp\client.exe"C:\Users\Admin\AppData\Local\Temp\client.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "$sxr-seroxen" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\$sxr-seroxen1\sxr.exe" /rl HIGHEST /f2⤵
- Scheduled Task/Job: Scheduled Task
-
-
C:\Users\Admin\AppData\Roaming\$sxr-seroxen1\sxr.exe"C:\Users\Admin\AppData\Roaming\$sxr-seroxen1\sxr.exe"2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
-
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "$sxr-seroxen" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\$sxr-seroxen1\sxr.exe" /rl HIGHEST /f3⤵
- Scheduled Task/Job: Scheduled Task
-
-
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C:\Users\Admin\AppData\Roaming\$sxr-seroxen1\sxr.exeC:\Users\Admin\AppData\Roaming\$sxr-seroxen1\sxr.exe1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
sxr.exe
memory/1676-0-0x0000000000260000-0x000000000058C000-memory.dmp
memory/1676-1-0x000000001B380000-0x000000001B390000-memory.dmp
memory/1676-8-0x000000001B110000-0x000000001B122000-memory.dmp
memory/1676-7-0x0000000000EB0000-0x0000000000EBC000-memory.dmp
memory/2496-12-0x000000001C330000-0x000000001C3E2000-memory.dmp
memory/2496-9-0x000000001B830000-0x000000001B840000-memory.dmp
memory/2496-11-0x0000000002B70000-0x0000000002BC0000-memory.dmp
memory/2496-16-0x0000000001280000-0x000000000128C000-memory.dmp
memory/2496-17-0x0000000001330000-0x0000000001342000-memory.dmp
memory/2496-18-0x000000001B830000-0x000000001B840000-memory.dmp
memory/4520-14-0x0000000000CD0000-0x0000000000CDC000-memory.dmp
memory/4520-15-0x0000000000EA0000-0x0000000000EB2000-memory.dmp