Analysis
- max time kernel
149s - max time network
151s - platform
windows10-2004_x64 - resource
win10v2004-20231215-en - resource tags
- submitted
10/04/2024, 11:16
General
- Target Client-built.exe
- Size 3.1MB
- Sample240410-ndmlnsgh21
- SHA256 bf4b331a3329acc0925ed37d55dc9ff54934eeaa30547e4221ae8c10aa5b1658
Malware Config
Extracted
-
quasar
-
1.4.1
-
Office04
-
192.168.0.115:4782
-
cf2c53c5-bc92-40a0-b53b-7c5edbcd7ef3
-
encryption_key
EAFB08E07600E62659A174CCF3C54BA2CDDDD47A
-
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\Client-built.exe"C:\Users\Admin\AppData\Local\Temp\Client-built.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/744-9-0x00007FFF6BF00000-0x00007FFF6C9C1000-memory.dmp
memory/744-10-0x000000001B950000-0x000000001B960000-memory.dmp
memory/744-11-0x000000001B860000-0x000000001B8B0000-memory.dmp
memory/744-12-0x000000001D790000-0x000000001D842000-memory.dmp
memory/744-13-0x00007FFF6BF00000-0x00007FFF6C9C1000-memory.dmp
memory/744-14-0x000000001B950000-0x000000001B960000-memory.dmp
memory/1452-0-0x0000000000150000-0x0000000000474000-memory.dmp
memory/1452-1-0x00007FFF6BF00000-0x00007FFF6C9C1000-memory.dmp
memory/1452-2-0x000000001B080000-0x000000001B090000-memory.dmp
memory/1452-8-0x00007FFF6BF00000-0x00007FFF6C9C1000-memory.dmp