Analysis
- max time kernel
136s - max time network
148s - platform
windows10-2004_x64 - resource
win10v2004-20240508-en - resource tags
- submitted
01/06/2024, 13:32
General
- Target image_logger.exe
- Size 3.1MB
- Sample240601-qs8tkaec99
- SHA256 740eae2194c61a026196e3e6e0ebd629d4b876f8e591fdfd0b662878a86546e0
Malware Config
Extracted
-
quasar
-
1.4.1
-
Office04
-
192.168.1.146:4782
-
34162b02-2762-4654-b588-2cfc3f9d49d6
-
encryption_key
53AE412E3C7FE26F176F4B85B9D37FEA82C46128
-
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
- 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\image_logger.exe"C:\Users\Admin\AppData\Local\Temp\image_logger.exe"1⤵
- Drops file in System32 directory
- 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:\Windows\system32\SubDir\Client.exe" /rl HIGHEST /f2⤵
- Creates scheduled task(s)
-
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C:\Windows\system32\SubDir\Client.exe"C:\Windows\system32\SubDir\Client.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 "Quasar Client Startup" /sc ONLOGON /tr "C:\Windows\system32\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/560-10-0x00007FFF4ABA0000-0x00007FFF4B661000-memory.dmp
memory/560-11-0x00007FFF4ABA0000-0x00007FFF4B661000-memory.dmp
memory/560-12-0x000000001B0A0000-0x000000001B0F0000-memory.dmp
memory/560-13-0x000000001B9B0000-0x000000001BA62000-memory.dmp
memory/560-14-0x00007FFF4ABA0000-0x00007FFF4B661000-memory.dmp
memory/3568-0-0x00007FFF4ABA3000-0x00007FFF4ABA5000-memory.dmp
memory/3568-1-0x00000000001F0000-0x0000000000514000-memory.dmp
memory/3568-2-0x00007FFF4ABA0000-0x00007FFF4B661000-memory.dmp
memory/3568-9-0x00007FFF4ABA0000-0x00007FFF4B661000-memory.dmp