Analysis
- max time kernel
144s - max time network
146s - platform
windows10-1703_x64 - resource
win10-20240221-en - resource tags
- submitted
23/03/2024, 19:56
General
- Target Client-built.exe
- Size 348KB
- Sample240323-yn5kcaeb6s
- SHA256 169c150e8f08da5a4ab2b46bc67cdd1d2d006a060b39d66e559dbfdc53017414
Malware Config
Extracted
-
quasar
-
1.3.0.0
-
Office04
-
Vallithebest-32755.portmap.host:32755
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QSR_MUTEX_3gXoc7Rbb6gDK9k7Ha
-
encryption_key
MgIQlrEArYoUL3gDO4iZ
-
install_name
WindowsSound.exe
-
log_directory
Logs
-
reconnect_delay
3000
-
startup_key
WindowsSound.exe
-
subdirectory
SubDir
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 SetWindowsHookEx 1 IoCs
- Suspicious use of WriteProcessMemory 9 IoCs
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\SysWOW64\schtasks.exe"schtasks" /create /tn "WindowsSound.exe" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\Client-built.exe" /rl HIGHEST /f2⤵
- Creates scheduled task(s)
-
-
C:\Users\Admin\AppData\Roaming\SubDir\WindowsSound.exe"C:\Users\Admin\AppData\Roaming\SubDir\WindowsSound.exe"2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\schtasks.exe"schtasks" /create /tn "WindowsSound.exe" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\WindowsSound.exe" /rl HIGHEST /f3⤵
- Creates scheduled task(s)
-
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
WindowsSound.exe
memory/2436-20-0x0000000005350000-0x0000000005360000-memory.dmp
memory/2436-19-0x0000000073220000-0x000000007390E000-memory.dmp
memory/2436-18-0x0000000006500000-0x000000000650A000-memory.dmp
memory/2436-16-0x0000000005350000-0x0000000005360000-memory.dmp
memory/2436-15-0x0000000073220000-0x000000007390E000-memory.dmp
memory/4824-6-0x0000000005BA0000-0x0000000005BB2000-memory.dmp
memory/4824-7-0x0000000005F90000-0x0000000005FCE000-memory.dmp
memory/4824-0-0x0000000000520000-0x000000000057E000-memory.dmp
memory/4824-14-0x0000000073220000-0x000000007390E000-memory.dmp
memory/4824-5-0x0000000005080000-0x00000000050E6000-memory.dmp
memory/4824-4-0x0000000004FD0000-0x0000000004FE0000-memory.dmp
memory/4824-3-0x0000000004FE0000-0x0000000005072000-memory.dmp
memory/4824-2-0x0000000005400000-0x00000000058FE000-memory.dmp
memory/4824-1-0x0000000073220000-0x000000007390E000-memory.dmp