Analysis
- max time kernel
149s - max time network
151s - platform
windows10-2004_x64 - resource
win10v2004-20240412-en - resource tags
- submitted
15/04/2024, 03:28
General
- Target HEUR-Trojan.MSIL.Quasar.exe
- Size 3.4MB
- Sample240415-d1k19add99
- SHA256 788c859458ab91850978e27a2591b564e5e3200eede844362bf465944db9d92c
Malware Config
Extracted
-
quasar
-
1.4.1
-
Office04
-
85.219.48.223:6969
-
dd7993dd-3ead-48cf-ab1a-635718753276
-
encryption_key
DC9E2A3C163F32C37AC47FC14DF7F94F33786801
-
install_name
Client.exe
-
log_directory
Logs
-
reconnect_delay
3000
-
startup_key
:)
-
subdirectory
SubDir
Signatures
- Quasar RAT
Quasar is an open source Remote Access Tool.
- Quasar payload 2 IoCs
- Detects Windows executables referencing non-Windows User-Agents 2 IoCs
- Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers. 2 IoCs
- Detects executables containing common artifacts observed in infostealers 2 IoCs
- Executes dropped EXE 1 IoCs
- Adds Run key to start application 2 TTPs 2 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 FindShellTrayWindow 1 IoCs
- Suspicious use of SendNotifyMessage 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\HEUR-Trojan.MSIL.Quasar.exe"C:\Users\Admin\AppData\Local\Temp\HEUR-Trojan.MSIL.Quasar.exe"1⤵
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn ":)" /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
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
-
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn ":)" /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/2040-0-0x0000000000FA0000-0x0000000001306000-memory.dmp
memory/2040-1-0x00007FFFA1720000-0x00007FFFA21E1000-memory.dmp
memory/2040-2-0x000000001C1C0000-0x000000001C1D0000-memory.dmp
memory/2040-10-0x00007FFFA1720000-0x00007FFFA21E1000-memory.dmp
memory/2796-9-0x00007FFFA1720000-0x00007FFFA21E1000-memory.dmp
memory/2796-11-0x0000000002D50000-0x0000000002D60000-memory.dmp
memory/2796-12-0x000000001B760000-0x000000001B7B0000-memory.dmp
memory/2796-13-0x000000001BFB0000-0x000000001C062000-memory.dmp
memory/2796-14-0x00007FFFA1720000-0x00007FFFA21E1000-memory.dmp
memory/2796-15-0x0000000002D50000-0x0000000002D60000-memory.dmp