Analysis
- max time kernel
94s - max time network
132s - platform
windows10-2004_x64 - resource
win10v2004-20241007-en - resource tags
- submitted
08/12/2024, 18:26
General
- Target Client-built.exe
- Size 3.3MB
- Sample241208-w3ftes1pex
- SHA256 151e2900f743156d22c24cd82f3ea1b8027d2e4d5f13fb2588113fa5e02b81e5
Malware Config
Extracted
-
quasar
-
1.4.1
-
Office04
-
45.200.148.155:6060
-
4b3820e0-d123-49d9-b51e-3c4daa4f6874
-
encryption_key
F8879E9B26846C57C99B6F152F74703E1CC15B8B
-
install_name
SecurityHealthSystray.exe
-
log_directory
Logs
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reconnect_delay
3000
-
startup_key
SecurityHealthSystray.exe
-
subdirectory
SubDir
Signatures
- Quasar RAT
Quasar is an open source Remote Access Tool.
- Quasar family
- Quasar payload 2 IoCs
- Executes dropped EXE 1 IoCs
- Drops file in System32 directory 5 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 FindShellTrayWindow 2 IoCs
- Suspicious use of SendNotifyMessage 2 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⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "SecurityHealthSystray.exe" /sc ONLOGON /tr "C:\Windows\system32\SubDir\SecurityHealthSystray.exe" /rl HIGHEST /f2⤵
- Scheduled Task/Job: Scheduled Task
-
-
C:\Windows\system32\SubDir\SecurityHealthSystray.exe"C:\Windows\system32\SubDir\SecurityHealthSystray.exe"2⤵
- Executes dropped EXE
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
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C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "SecurityHealthSystray.exe" /sc ONLOGON /tr "C:\Windows\system32\SubDir\SecurityHealthSystray.exe" /rl HIGHEST /f3⤵
- Scheduled Task/Job: Scheduled Task
-
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
SecurityHealthSystray.exe
memory/3940-10-0x00007FFEF6F00000-0x00007FFEF79C1000-memory.dmp
memory/3940-11-0x00007FFEF6F00000-0x00007FFEF79C1000-memory.dmp
memory/3940-12-0x000000001B230000-0x000000001B280000-memory.dmp
memory/3940-13-0x000000001BD20000-0x000000001BDD2000-memory.dmp
memory/3940-14-0x00007FFEF6F00000-0x00007FFEF79C1000-memory.dmp
memory/3940-15-0x0000000002920000-0x0000000002932000-memory.dmp
memory/3940-16-0x000000001B2D0000-0x000000001B30C000-memory.dmp
memory/4804-0-0x00007FFEF6F03000-0x00007FFEF6F05000-memory.dmp
memory/4804-1-0x0000000000460000-0x00000000007B2000-memory.dmp
memory/4804-2-0x00007FFEF6F00000-0x00007FFEF79C1000-memory.dmp
memory/4804-9-0x00007FFEF6F00000-0x00007FFEF79C1000-memory.dmp