Analysis
- max time kernel
150s - max time network
156s - platform
windows10-2004_x64 - resource
win10v2004-20231023-en - resource tags
- submitted
04/11/2023, 07:37
General
- Target 495058aeaf20ed292bfd433eb7bfa85c7fca16fd7da9174169327d7ed59a4709.exe
- Size 3.1MB
- Sample231104-jfz8bsfb89
- SHA256 495058aeaf20ed292bfd433eb7bfa85c7fca16fd7da9174169327d7ed59a4709
Malware Config
Extracted
-
quasar
-
1.4.1
-
Office04
-
172.20.150.175:8808
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1eb0a79a-787c-4beb-a7fe-0b2cfd667fa6
-
encryption_key
C29B7F15245870C49876E2EE9D4791A3D8C283C5
-
install_name
Client.exe
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log_directory
Logs
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reconnect_delay
1500
-
startup_key
tanium
-
subdirectory
SubDir
Signatures
- Quasar RAT
Quasar is an open source Remote Access Tool.
- Quasar payload 3 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\495058aeaf20ed292bfd433eb7bfa85c7fca16fd7da9174169327d7ed59a4709.exe"C:\Users\Admin\AppData\Local\Temp\495058aeaf20ed292bfd433eb7bfa85c7fca16fd7da9174169327d7ed59a4709.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "tanium" /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
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C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "tanium" /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
Client.exe
memory/2108-0-0x0000000000510000-0x0000000000834000-memory.dmp
memory/2108-1-0x00007FFE55470000-0x00007FFE55F31000-memory.dmp
memory/2108-2-0x000000001B560000-0x000000001B570000-memory.dmp
memory/2108-9-0x00007FFE55470000-0x00007FFE55F31000-memory.dmp
memory/2636-8-0x00007FFE55470000-0x00007FFE55F31000-memory.dmp
memory/2636-10-0x0000000002F50000-0x0000000002F60000-memory.dmp
memory/2636-11-0x000000001BFF0000-0x000000001C040000-memory.dmp
memory/2636-12-0x000000001C100000-0x000000001C1B2000-memory.dmp
memory/2636-13-0x00007FFE55470000-0x00007FFE55F31000-memory.dmp