Analysis
- max time kernel
149s - max time network
151s - platform
windows11-21h2_x64 - resource
win11-20240221-en - resource tags
- submitted
29/03/2024, 21:36
General
- Target cfada3d1db541795fb4e8bfdd978722db630d1727092dccbb6624ce72aa7d97b.exe
- Size 3.1MB
- Sample240329-1f26csac9w
- SHA256 cfada3d1db541795fb4e8bfdd978722db630d1727092dccbb6624ce72aa7d97b
Malware Config
Extracted
-
quasar
-
1.4.1
-
Office04
-
157.254.223.91:8083
-
bb5c6970-413c-45e5-b0b7-3a27b7b1f1e9
-
encryption_key
6BCD20F7052E0B040F0FDF07F45A35E3BDE7E2A1
-
install_name
Client.exe
-
log_directory
Logs
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reconnect_delay
3000
-
startup_key
Quasar Client Startup
-
subdirectory
SubDir
Signatures
- Quasar RAT
Quasar is an open source Remote Access Tool.
- Quasar payload 2 IoCs
- Executes dropped EXE 1 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\cfada3d1db541795fb4e8bfdd978722db630d1727092dccbb6624ce72aa7d97b.exe"C:\Users\Admin\AppData\Local\Temp\cfada3d1db541795fb4e8bfdd978722db630d1727092dccbb6624ce72aa7d97b.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f2⤵
- Creates scheduled task(s)
-
-
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"C:\Users\Admin\AppData\Roaming\SubDir\Client.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 "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f3⤵
- Creates scheduled task(s)
-
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
Client.exe
memory/1116-10-0x00007FF934900000-0x00007FF9353C2000-memory.dmp
memory/1116-11-0x000000001C2C0000-0x000000001C310000-memory.dmp
memory/1116-12-0x000000001C3D0000-0x000000001C482000-memory.dmp
memory/1116-13-0x00007FF934900000-0x00007FF9353C2000-memory.dmp
memory/3160-0-0x0000000000E60000-0x0000000001184000-memory.dmp
memory/3160-1-0x00007FF934900000-0x00007FF9353C2000-memory.dmp
memory/3160-2-0x00000000019B0000-0x00000000019C0000-memory.dmp
memory/3160-9-0x00007FF934900000-0x00007FF9353C2000-memory.dmp