Analysis
- max time kernel
283s - max time network
305s - platform
windows10-2004_x64 - resource
win10v2004-20231215-en - resource tags
- submitted
04/02/2024, 22:31
General
- Target generated.exe
- Size 3.1MB
- Sample240204-2fpeyaebhr
- SHA256 2c243fb2c148a5e4aabcbbdd56ef9573fa92a84170ee8b4b077999fd6690c994
Malware Config
Extracted
-
quasar
-
1.4.1
-
Office04
-
192.168.0.9:4782
-
d5791a4e-d7f1-4b69-a428-acd1dd3760b6
-
encryption_key
AEA53DABB8F66357C4831109E1591829040456A5
-
install_name
Client.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
- 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\generated.exe"C:\Users\Admin\AppData\Local\Temp\generated.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\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
-
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "Quasar Client Startup" /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/1820-0-0x0000000000570000-0x0000000000894000-memory.dmp
memory/1820-1-0x00007FFC19600000-0x00007FFC1A0C1000-memory.dmp
memory/1820-2-0x000000001B650000-0x000000001B660000-memory.dmp
memory/1820-10-0x00007FFC19600000-0x00007FFC1A0C1000-memory.dmp
memory/2396-9-0x00007FFC19600000-0x00007FFC1A0C1000-memory.dmp
memory/2396-11-0x000000001AFC0000-0x000000001AFD0000-memory.dmp
memory/2396-12-0x000000001B710000-0x000000001B760000-memory.dmp
memory/2396-13-0x000000001B820000-0x000000001B8D2000-memory.dmp
memory/2396-14-0x00007FFC19600000-0x00007FFC1A0C1000-memory.dmp