Analysis
- max time kernel
51s - max time network
54s - platform
windows10-2004_x64 - resource
win10v2004-20240802-en - resource tags
- submitted
03/08/2024, 15:02
General
- Target qqsarbuilder.exe
- Size 3.1MB
- Sample240803-see1fa1fqd
- SHA256 27f1a7bab299f2c36793116723e05be58c6edff36c07ba24a2703903cbdd6048
Malware Config
Extracted
-
quasar
-
1.4.1
-
Office04
-
192.168.174.129:4782
-
4642d254-5910-430f-8e8f-b944ab72b6fd
-
encryption_key
F0F78B2B4A3D25098C1C1557DC99FDA4D204F27D
-
install_name
windwsupdater.exe
-
log_directory
Logs
-
reconnect_delay
3000
-
startup_key
windwsupdater
-
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\qqsarbuilder.exe"C:\Users\Admin\AppData\Local\Temp\qqsarbuilder.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "windwsupdater" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\windwsupdater.exe" /rl HIGHEST /f2⤵
- Scheduled Task/Job: Scheduled Task
-
-
C:\Users\Admin\AppData\Roaming\SubDir\windwsupdater.exe"C:\Users\Admin\AppData\Roaming\SubDir\windwsupdater.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 "windwsupdater" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\windwsupdater.exe" /rl HIGHEST /f3⤵
- Scheduled Task/Job: Scheduled Task
-
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
windwsupdater.exe
memory/1408-0-0x00007FFF5C3A3000-0x00007FFF5C3A5000-memory.dmp
memory/1408-1-0x00000000004A0000-0x00000000007C4000-memory.dmp
memory/1408-2-0x00007FFF5C3A0000-0x00007FFF5CE61000-memory.dmp
memory/1408-9-0x00007FFF5C3A0000-0x00007FFF5CE61000-memory.dmp
memory/2604-10-0x00007FFF5C3A0000-0x00007FFF5CE61000-memory.dmp
memory/2604-11-0x00007FFF5C3A0000-0x00007FFF5CE61000-memory.dmp
memory/2604-12-0x000000001B3C0000-0x000000001B410000-memory.dmp
memory/2604-13-0x000000001D590000-0x000000001D642000-memory.dmp
memory/2604-14-0x00007FFF5C3A0000-0x00007FFF5CE61000-memory.dmp
memory/2604-15-0x00007FFF5C3A0000-0x00007FFF5CE61000-memory.dmp