Analysis
- max time kernel
151s - max time network
161s - platform
windows10-2004_x64 - resource
win10v2004-20220812-en - resource tags
- submitted
11/02/2023, 01:29
General
- Target 398d98b126f3924b8618fdbf11d52aad45a74cb2b70f8efa38592b8cb1aaadb4.exe
- Size 144KB
- Sample230211-bwp4asaa3x
- SHA256 398d98b126f3924b8618fdbf11d52aad45a74cb2b70f8efa38592b8cb1aaadb4
Malware Config
Signatures
- Quasar RAT 3 IoCs
Quasar is an open source Remote Access Tool.
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- Executes dropped EXE 3 IoCs
- Adds Run key to start application 2 TTPs 2 IoCs
- Looks up external IP address via web service 2 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
- Creates scheduled task(s) 1 TTPs 3 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 8 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\398d98b126f3924b8618fdbf11d52aad45a74cb2b70f8efa38592b8cb1aaadb4.exe"C:\Users\Admin\AppData\Local\Temp\398d98b126f3924b8618fdbf11d52aad45a74cb2b70f8efa38592b8cb1aaadb4.exe"1⤵
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "Cortana" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\398d98b126f3924b8618fdbf11d52aad45a74cb2b70f8efa38592b8cb1aaadb4.exe" /rl HIGHEST /f2⤵
- Quasar RAT
- Creates scheduled task(s)
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C:\Users\Admin\AppData\Roaming\Microsoft\svchost.exe"C:\Users\Admin\AppData\Roaming\Microsoft\svchost.exe"2⤵
- Checks computer location settings
- Executes dropped EXE
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
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C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "Cortana" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Microsoft\svchost.exe" /rl HIGHEST /f3⤵
- Creates scheduled task(s)
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C:\Windows\System32\schtasks.exe"C:\Windows\System32\schtasks.exe" /create /tn "WINDOWSSYSTEMHOST" /tr "C:\Users\Admin\AppData\Roaming\Microsoft\svchost.exe" /sc MINUTE /MO 13⤵
- Creates scheduled task(s)
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C:\Users\Admin\AppData\Roaming\Microsoft\svchost.exeC:\Users\Admin\AppData\Roaming\Microsoft\svchost.exe1⤵
- Executes dropped EXE
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C:\Users\Admin\AppData\Roaming\Microsoft\svchost.exeC:\Users\Admin\AppData\Roaming\Microsoft\svchost.exe1⤵
- Executes dropped EXE
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
svchost.exe.log
svchost.exe
svchost.exe
svchost.exe
svchost.exe
memory/1616-142-0x000000001E600000-0x000000001E63C000-memory.dmp
memory/1616-141-0x00007FF970940000-0x00007FF971401000-memory.dmp
memory/1616-145-0x00007FF970940000-0x00007FF971401000-memory.dmp
memory/3964-148-0x00007FF970940000-0x00007FF971401000-memory.dmp
memory/3964-147-0x00007FF970940000-0x00007FF971401000-memory.dmp
memory/4220-152-0x00007FF970940000-0x00007FF971401000-memory.dmp
memory/4220-151-0x00007FF970940000-0x00007FF971401000-memory.dmp
memory/4832-135-0x00007FF970940000-0x00007FF971401000-memory.dmp
memory/4832-134-0x0000000002360000-0x0000000002372000-memory.dmp
memory/4832-133-0x00007FF970940000-0x00007FF971401000-memory.dmp
memory/4832-140-0x00007FF970940000-0x00007FF971401000-memory.dmp
memory/4832-132-0x00000000000B0000-0x00000000000B8000-memory.dmp