Analysis
- max time kernel
148s - max time network
152s - platform
windows10-2004_x64 - resource
win10v2004-20240226-en - resource tags
- submitted
24/03/2024, 01:08
General
- Target Client.exe
- Size 348KB
- Sample240324-bg8bbsaa2s
- SHA256 3c3b47e05f6960d1fdf233949ba2881dd32341ea84240ce3e9b59f0d29ec9fa7
Malware Config
Extracted
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quasar
-
1.3.0.0
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Office04
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192.168.0.100:4782
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QSR_MUTEX_hesMVzHRGDZjvsZhI7
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encryption_key
F2l1q8bKCz0sFJakXt5c
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install_name
vapev4.exe
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log_directory
Logs
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reconnect_delay
3000
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startup_key
Windows defender application
-
subdirectory
niger
Signatures
- Quasar RAT
Quasar is an open source Remote Access Tool.
- Quasar payload 2 IoCs
- Executes dropped EXE 1 IoCs
- Looks up external IP address via web service 1 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
- 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 WriteProcessMemory 9 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\Client.exe"C:\Users\Admin\AppData\Local\Temp\Client.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\schtasks.exe"schtasks" /create /tn "Windows defender application" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\Client.exe" /rl HIGHEST /f2⤵
- Creates scheduled task(s)
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C:\Users\Admin\AppData\Roaming\niger\vapev4.exe"C:\Users\Admin\AppData\Roaming\niger\vapev4.exe"2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\schtasks.exe"schtasks" /create /tn "Windows defender application" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\niger\vapev4.exe" /rl HIGHEST /f3⤵
- Creates scheduled task(s)
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
vapev4.exe
memory/1440-18-0x0000000002C20000-0x0000000002C30000-memory.dmp
memory/1440-17-0x00000000067F0000-0x00000000067FA000-memory.dmp
memory/1440-16-0x0000000075350000-0x0000000075B00000-memory.dmp
memory/1440-15-0x0000000002C20000-0x0000000002C30000-memory.dmp
memory/1440-13-0x0000000075350000-0x0000000075B00000-memory.dmp
memory/2096-6-0x00000000066F0000-0x0000000006702000-memory.dmp
memory/2096-7-0x0000000006C30000-0x0000000006C6C000-memory.dmp
memory/2096-0-0x0000000000F80000-0x0000000000FDE000-memory.dmp
memory/2096-14-0x0000000075350000-0x0000000075B00000-memory.dmp
memory/2096-5-0x0000000005AC0000-0x0000000005B26000-memory.dmp
memory/2096-4-0x0000000005B40000-0x0000000005B50000-memory.dmp
memory/2096-3-0x0000000005A20000-0x0000000005AB2000-memory.dmp
memory/2096-2-0x0000000005FD0000-0x0000000006574000-memory.dmp
memory/2096-1-0x0000000075350000-0x0000000075B00000-memory.dmp