Analysis
- max time kernel
146s - max time network
152s - platform
windows10-2004_x64 - resource
win10v2004-20240226-en - resource tags
- submitted
09/03/2024, 05:58
General
- Target 5d2a6561c0a15244f3d7cf2c369e11395d040232ff6201e6847dcd5061a7599d.exe
- Size 3.1MB
- Sample240309-gn7ahaeb6s
- SHA256 5d2a6561c0a15244f3d7cf2c369e11395d040232ff6201e6847dcd5061a7599d
Malware Config
Extracted
-
quasar
-
1.4.1
-
Office04
-
168.75.105.185:4782
-
58906a4e-9ac4-49e8-a4d5-6107b1975801
-
encryption_key
66EB66A197A4E6EC1332FEED8290CAC1A919B085
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install_name
systems.exe
-
log_directory
Logs
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reconnect_delay
3000
-
startup_key
systems
-
subdirectory
SubDir
Signatures
- Quasar RAT
Quasar is an open source Remote Access Tool.
- Quasar payload 3 IoCs
- Executes dropped EXE 1 IoCs
- Drops file in System32 directory 5 IoCs
- Creates scheduled task(s) 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
- Suspicious use of AdjustPrivilegeToken 2 IoCs
- Suspicious use of SetWindowsHookEx 1 IoCs
- Suspicious use of WriteProcessMemory 6 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\5d2a6561c0a15244f3d7cf2c369e11395d040232ff6201e6847dcd5061a7599d.exe"C:\Users\Admin\AppData\Local\Temp\5d2a6561c0a15244f3d7cf2c369e11395d040232ff6201e6847dcd5061a7599d.exe"1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "systems" /sc ONLOGON /tr "C:\Windows\system32\SubDir\systems.exe" /rl HIGHEST /f2⤵
- Creates scheduled task(s)
-
-
C:\Windows\system32\SubDir\systems.exe"C:\Windows\system32\SubDir\systems.exe"2⤵
- Executes dropped EXE
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
-
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "systems" /sc ONLOGON /tr "C:\Windows\system32\SubDir\systems.exe" /rl HIGHEST /f3⤵
- Creates scheduled task(s)
-
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
systems.exe
systems.exe
memory/2732-13-0x000000001C140000-0x000000001C1F2000-memory.dmp
memory/2732-9-0x00007FFF5FE20000-0x00007FFF608E1000-memory.dmp
memory/2732-11-0x000000001B530000-0x000000001B540000-memory.dmp
memory/2732-12-0x000000001C030000-0x000000001C080000-memory.dmp
memory/2732-16-0x000000001C0B0000-0x000000001C0C2000-memory.dmp
memory/2732-17-0x000000001C840000-0x000000001C87C000-memory.dmp
memory/2732-18-0x00007FFF5FE20000-0x00007FFF608E1000-memory.dmp
memory/3800-2-0x00000000027A0000-0x00000000027B0000-memory.dmp
memory/3800-1-0x00007FFF5FE20000-0x00007FFF608E1000-memory.dmp
memory/3800-10-0x00007FFF5FE20000-0x00007FFF608E1000-memory.dmp
memory/3800-0-0x0000000000230000-0x0000000000554000-memory.dmp