Analysis
- max time kernel
31s - max time network
32s - platform
windows10-ltsc 2021_x64 - resource
win10ltsc2021-20241211-en - resource tags
- submitted
16/12/2024, 01:11
General
- Target Reparador MTA.exe
- Size 3.3MB
- Sample241216-bkczlaxreq
- SHA256 fe3d6fad8814926141da7cf0e91fc86c920b5e4a6ddf7c7d3d42c2a539421e24
Malware Config
Extracted
-
quasar
-
1.4.1
-
Office04
-
azxq0ap.localto.net:3425
-
e51e2b65-e963-4051-9736-67d57ed46798
-
encryption_key
AEA258EF65BF1786F0F767C0BE2497ECC304C46F
-
install_name
WindowsUpdate.exe
-
log_directory
Logs
-
reconnect_delay
3000
-
startup_key
WindowsUpdate
-
subdirectory
SubDir
Signatures
- Quasar RAT
Quasar is an open source Remote Access Tool.
- Quasar family
- 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\Reparador MTA.exe"C:\Users\Admin\AppData\Local\Temp\Reparador MTA.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "WindowsUpdate" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\WindowsUpdate.exe" /rl HIGHEST /f2⤵
- Scheduled Task/Job: Scheduled Task
-
-
C:\Users\Admin\AppData\Roaming\SubDir\WindowsUpdate.exe"C:\Users\Admin\AppData\Roaming\SubDir\WindowsUpdate.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 "WindowsUpdate" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\WindowsUpdate.exe" /rl HIGHEST /f3⤵
- Scheduled Task/Job: Scheduled Task
-
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
WindowsUpdate.exe
memory/1148-5-0x00007FFAF1FF0000-0x00007FFAF2AB2000-memory.dmp
memory/1148-7-0x00007FFAF1FF0000-0x00007FFAF2AB2000-memory.dmp
memory/1148-8-0x000000001CD50000-0x000000001CDA0000-memory.dmp
memory/1148-9-0x000000001CE60000-0x000000001CF12000-memory.dmp
memory/1148-10-0x000000001CDA0000-0x000000001CDB2000-memory.dmp
memory/1148-11-0x000000001CE00000-0x000000001CE3C000-memory.dmp
memory/1148-12-0x00007FFAF1FF0000-0x00007FFAF2AB2000-memory.dmp
memory/1388-0-0x00007FFAF1FF3000-0x00007FFAF1FF5000-memory.dmp
memory/1388-1-0x0000000000730000-0x0000000000A86000-memory.dmp
memory/1388-2-0x00007FFAF1FF0000-0x00007FFAF2AB2000-memory.dmp
memory/1388-6-0x00007FFAF1FF0000-0x00007FFAF2AB2000-memory.dmp