Analysis
- max time kernel
31s - max time network
37s - platform
windows10-2004_x64 - resource
win10v2004-20240226-en - resource tags
- submitted
01/04/2024, 00:01
General
- Target Client-built.exe
- Size 3.1MB
- Sample240401-aa6cqagc32
- SHA256 89290cb888363f445087cfcee9d81948fef9c34c746de33b5ab984c0c53dc5a1
Malware Config
Extracted
-
quasar
-
1.4.1
-
Office04
-
192.168.2.138:4782
-
6ab1fa7b-a786-47cb-960d-a361d8c52d03
-
encryption_key
80B3B0F59FBCF1E51E98C1D775959C20EA6B8630
-
install_name
HWID Spoofer.exe
-
log_directory
Logs
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reconnect_delay
3000
-
startup_key
Java update
-
subdirectory
,
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
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C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "Java update" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\,\HWID Spoofer.exe" /rl HIGHEST /f2⤵
- Creates scheduled task(s)
-
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C:\Users\Admin\AppData\Roaming\,\HWID Spoofer.exe"C:\Users\Admin\AppData\Roaming\,\HWID Spoofer.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 "Java update" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\,\HWID Spoofer.exe" /rl HIGHEST /f3⤵
- Creates scheduled task(s)
-
-
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C:\Windows\System32\rundll32.exeC:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding1⤵
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
HWID Spoofer.exe
memory/2124-0-0x00000000008D0000-0x0000000000BF4000-memory.dmp
memory/2124-1-0x00007FFE2CDB0000-0x00007FFE2D871000-memory.dmp
memory/2124-2-0x0000000001E00000-0x0000000001E10000-memory.dmp
memory/2124-10-0x00007FFE2CDB0000-0x00007FFE2D871000-memory.dmp
memory/4252-9-0x00007FFE2CDB0000-0x00007FFE2D871000-memory.dmp
memory/4252-11-0x000000001B8B0000-0x000000001B8C0000-memory.dmp
memory/4252-12-0x00000000013A0000-0x00000000013F0000-memory.dmp
memory/4252-13-0x000000001C470000-0x000000001C522000-memory.dmp
memory/4252-14-0x00007FFE2CDB0000-0x00007FFE2D871000-memory.dmp