Analysis
- max time kernel
141s - max time network
151s - platform
windows10-2004_x64 - resource
win10v2004-20230703-en - resource tags
- submitted
08/08/2023, 20:11
General
- Target tmp.exe
- Size 3.1MB
- Sample230808-yx8clafe69
- SHA256 7f3ce13c39b8aa0202357579138c56a684a5c0aad61b8b5c1f3fd20f12afa916
Malware Config
Extracted
-
quasar
-
1.4.1
-
Muahaha
-
37.139.129.145:5512
-
9ea0edc2-299b-4ba4-bb26-0c01d3ce5e5f
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encryption_key
D21B49539C3EA494897D43CF75CBF5F989F0792A
-
install_name
ntoskrnl.exe
-
log_directory
SystemLogs
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reconnect_delay
3000
-
startup_key
Microsoft Windows Operating System
-
subdirectory
Microsoft Windows Operating System
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
Processes
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C:\Users\Admin\AppData\Local\Temp\tmp.exe"C:\Users\Admin\AppData\Local\Temp\tmp.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "Microsoft Windows Operating System" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Microsoft Windows Operating System\ntoskrnl.exe" /rl HIGHEST /f2⤵
- Creates scheduled task(s)
-
-
C:\Users\Admin\AppData\Roaming\Microsoft Windows Operating System\ntoskrnl.exe"C:\Users\Admin\AppData\Roaming\Microsoft Windows Operating System\ntoskrnl.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 "Microsoft Windows Operating System" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Microsoft Windows Operating System\ntoskrnl.exe" /rl HIGHEST /f3⤵
- Creates scheduled task(s)
-
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
ntoskrnl.exe
ntoskrnl.exe
memory/1824-146-0x000000001C200000-0x000000001C2B2000-memory.dmp
memory/1824-142-0x00007FFBF59C0000-0x00007FFBF6481000-memory.dmp
memory/1824-144-0x000000001B9F0000-0x000000001BA00000-memory.dmp
memory/1824-145-0x000000001C0F0000-0x000000001C140000-memory.dmp
memory/1824-149-0x000000001C180000-0x000000001C192000-memory.dmp
memory/1824-150-0x000000001CD00000-0x000000001CD3C000-memory.dmp
memory/1824-151-0x00007FFBF59C0000-0x00007FFBF6481000-memory.dmp
memory/1824-152-0x000000001B9F0000-0x000000001BA00000-memory.dmp
memory/2736-135-0x000000001B350000-0x000000001B360000-memory.dmp
memory/2736-134-0x00007FFBF59C0000-0x00007FFBF6481000-memory.dmp
memory/2736-143-0x00007FFBF59C0000-0x00007FFBF6481000-memory.dmp
memory/2736-133-0x0000000000290000-0x00000000005B2000-memory.dmp