Analysis
- max time kernel
149s - max time network
151s - platform
windows10-2004_x64 - resource
win10v2004-20260513-en - resource tags
- submitted
24/08/2026, 11:32
General
- Target a7d3824bc6d71e139aa8c3d77d47f9cc2c2367cba77f9302dc71fb8870f53608.exe
- Size 2.0MB
- Sample260824-nnct8axamd
- SHA256 a7d3824bc6d71e139aa8c3d77d47f9cc2c2367cba77f9302dc71fb8870f53608
Malware Config
Extracted
-
quasar
-
1.4.1
-
Office04
-
127.0.0.1:4782
-
356050cf-1ede-401f-a90a-adee8f8cc5b9
-
encryption_key
7D0629ED26A9B150801A13EB2431C45A6A2A2564
-
install_name
RuntimeBroker.exe.exe
-
key_salt
bfeb1e56fbcd973bb219022430a57843003d5644d21e62b9d4f180e7e6c33941
-
log_directory
Logs
-
reconnect_delay
3000
-
startup_key
OneDrive Sync
-
subdirectory
Microsoft\Windows
Signatures
- Family: Quasar RAT
Quasar is an open source Remote Access Tool.
- Quasar payload 1 IoCs
- Executes dropped EXE 2 IoCs
- ConfuserEx .NET packer 1 IoCs
Detects ConfuserEx .NET packer.
- 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 FindShellTrayWindow 1 IoCs
- Suspicious use of SendNotifyMessage 1 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\a7d3824bc6d71e139aa8c3d77d47f9cc2c2367cba77f9302dc71fb8870f53608.exe"C:\Users\Admin\AppData\Local\Temp\a7d3824bc6d71e139aa8c3d77d47f9cc2c2367cba77f9302dc71fb8870f53608.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "OneDrive Sync" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\RuntimeBroker.exe.exe" /rl HIGHEST /f2⤵
- Scheduled Task/Job: Scheduled Task
-
-
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\RuntimeBroker.exe.exe"C:\Users\Admin\AppData\Roaming\Microsoft\Windows\RuntimeBroker.exe.exe"2⤵
- Executes dropped EXE
- 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 "OneDrive Sync" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\RuntimeBroker.exe.exe" /rl HIGHEST /f3⤵
- Scheduled Task/Job: Scheduled Task
-
-
-
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\RuntimeBroker.exe.exeC:\Users\Admin\AppData\Roaming\Microsoft\Windows\RuntimeBroker.exe.exe1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
RuntimeBroker.exe.exe
memory/1588-11-0x000000001B2E0000-0x000000001B2F0000-memory.dmp
memory/1588-13-0x000000001B2E0000-0x000000001B2F0000-memory.dmp
memory/1588-14-0x000000001B270000-0x000000001B2C0000-memory.dmp
memory/1588-15-0x000000001CA60000-0x000000001CB12000-memory.dmp
memory/2608-0-0x0000000000DE0000-0x0000000000E08000-memory.dmp
memory/2608-1-0x0000000002E50000-0x0000000002E56000-memory.dmp
memory/2608-2-0x0000000002E70000-0x0000000002E80000-memory.dmp
memory/2608-3-0x0000000002E70000-0x0000000002E80000-memory.dmp
memory/2608-4-0x000000001CA00000-0x000000001CD24000-memory.dmp