Analysis
- max time kernel
150s - max time network
150s - platform
windows10-2004_x64 - resource
win10v2004-20240802-en - resource tags
- submitted
11/08/2024, 00:02
General
- Target LastActivityWiev.exe
- Size 3.1MB
- Sample240811-abhm2svejp
- SHA256 40a670a4714e651afa90cdce4da7f586f6f40dbf034696ddc5747d61adba9ab7
Malware Config
Extracted
-
quasar
-
1.4.1
-
Office04
-
192.168.1.109:4782
-
a72e6887-4e57-4eb4-a931-4d1a8eb2aa51
-
encryption_key
FE0A4EB7BAC9FF6346368E207D03690CDEC2F565
-
install_name
LastActivityWiev.exe
-
log_directory
Logs
-
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
- Scheduled Task/Job: Scheduled Task 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\LastActivityWiev.exe"C:\Users\Admin\AppData\Local\Temp\LastActivityWiev.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\LastActivityWiev.exe" /rl HIGHEST /f2⤵
- Scheduled Task/Job: Scheduled Task
-
-
C:\Users\Admin\AppData\Roaming\SubDir\LastActivityWiev.exe"C:\Users\Admin\AppData\Roaming\SubDir\LastActivityWiev.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\LastActivityWiev.exe" /rl HIGHEST /f3⤵
- Scheduled Task/Job: Scheduled Task
-
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
LastActivityWiev.exe.log
LastActivityWiev.exe
memory/1336-10-0x00007FF9D4700000-0x00007FF9D51C1000-memory.dmp
memory/1336-12-0x00007FF9D4700000-0x00007FF9D51C1000-memory.dmp
memory/1336-13-0x0000000002810000-0x0000000002860000-memory.dmp
memory/1336-14-0x000000001BAE0000-0x000000001BB92000-memory.dmp
memory/1336-15-0x00007FF9D4700000-0x00007FF9D51C1000-memory.dmp
memory/2516-0-0x00007FF9D4703000-0x00007FF9D4705000-memory.dmp
memory/2516-1-0x00000000002D0000-0x00000000005F4000-memory.dmp
memory/2516-2-0x00007FF9D4700000-0x00007FF9D51C1000-memory.dmp
memory/2516-11-0x00007FF9D4700000-0x00007FF9D51C1000-memory.dmp