Analysis
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max time kernel
1s -
max time network
128s -
platform
windows10-2004_x64 -
resource
win10v2004-20231222-en -
resource tags
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submitted
07-01-2024 19:06
General
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Target
4942e9c13479bc1a62bdb07b23474e3c.exe
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Size
639KB
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MD5
4942e9c13479bc1a62bdb07b23474e3c
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SHA1
d7a7283939a2fa4506b47fa809431b9cc4d2559e
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SHA256
5b11f30be6e3bfb808c25d07b492cfa12840fd0efa795d8af397feba045d1c59
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SHA512
8c8edd299922fcfa100e3e725d1b09259a86e41546361273c386177a3e2a765ffc76169a5b9d142efb4c5335bee3805c1f908c7f4edae0f0a33f2631a037eb59
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SSDEEP
12288:66bJhnrd2Qsm/+/dnGz7O0Y244sMYcoFMVyMg+Yy1Wcwemn58WgxWM:6kJhngpn9kNsMwbMgkK58WgQM
Malware Config
Extracted
quasar
2.1.0.0
SEP05
23.105.131.187:7812
VNM_MUTEX_ea14HLQ5adxyrFdD2X
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encryption_key
jUWfdDb1toPE0KAlGJWH
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install_name
Windows Security.exe
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log_directory
Logs
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reconnect_delay
3000
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startup_key
Windows Update Service
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subdirectory
Windows Security Update
Signatures
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Contains code to disable Windows Defender 1 IoCs
A .NET executable tasked with disabling Windows Defender capabilities such as realtime monitoring, blocking at first seen, etc.
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Quasar RAT
Quasar is an open source Remote Access Tool.
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Quasar payload 1 IoCs
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VenomRAT
VenomRAT is a modified version of QuasarRAT with some added features, such as rootkit and stealer capabilites.
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Adds Run key to start application 2 TTPs 1 IoCs
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Looks up external IP address via web service 1 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
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Suspicious use of SetThreadContext 1 IoCs
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Creates scheduled task(s) 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
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Runs ping.exe 1 TTPs 1 IoCs
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Suspicious use of AdjustPrivilegeToken 1 IoCs
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Suspicious use of WriteProcessMemory 8 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\4942e9c13479bc1a62bdb07b23474e3c.exe"C:\Users\Admin\AppData\Local\Temp\4942e9c13479bc1a62bdb07b23474e3c.exe"1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\4942e9c13479bc1a62bdb07b23474e3c.exe"C:\Users\Admin\AppData\Local\Temp\4942e9c13479bc1a62bdb07b23474e3c.exe"2⤵
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe"powershell" Get-MpPreference -verbose3⤵
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C:\Users\Admin\AppData\Roaming\Windows Security Update\Windows Security.exe"C:\Users\Admin\AppData\Roaming\Windows Security Update\Windows Security.exe"3⤵
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C:\Windows\SysWOW64\schtasks.exe"schtasks" /create /tn "Windows Update Service" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\4942e9c13479bc1a62bdb07b23474e3c.exe" /rl HIGHEST /f3⤵
- Creates scheduled task(s)
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /k start /b del /q/f/s %TEMP%\* & exit3⤵
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C:\Windows\SysWOW64\cmd.exeC:\Windows\system32\cmd.exe /K del /q/f/s C:\Users\Admin\AppData\Local\Temp\*4⤵
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C:\Windows\SysWOW64\cmd.exeC:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\lPnWM0uIR6gd.bat" "3⤵
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C:\Users\Admin\AppData\Local\Temp\4942e9c13479bc1a62bdb07b23474e3c.exe"C:\Users\Admin\AppData\Local\Temp\4942e9c13479bc1a62bdb07b23474e3c.exe"4⤵
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C:\Users\Admin\AppData\Roaming\Windows Security Update\Windows Security.exe"C:\Users\Admin\AppData\Roaming\Windows Security Update\Windows Security.exe"1⤵
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C:\Windows\SysWOW64\schtasks.exe"schtasks" /create /tn "Windows Update Service" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Windows Security Update\Windows Security.exe" /rl HIGHEST /f2⤵
- Creates scheduled task(s)
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C:\Users\Admin\AppData\Roaming\Windows Security Update\Windows Security.exe"C:\Users\Admin\AppData\Roaming\Windows Security Update\Windows Security.exe"1⤵
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C:\Windows\SysWOW64\PING.EXEping -n 10 localhost1⤵
- Runs ping.exe
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C:\Windows\SysWOW64\chcp.comchcp 650011⤵
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C:\Users\Admin\AppData\Local\Temp\4942e9c13479bc1a62bdb07b23474e3c.exe"C:\Users\Admin\AppData\Local\Temp\4942e9c13479bc1a62bdb07b23474e3c.exe"1⤵
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
-
Filesize
40KB
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Filesize
64KB
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Filesize
624KB
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Filesize
584KB
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Filesize
7.7MB
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Filesize
664KB
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Filesize
5.6MB
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Filesize
7.7MB
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Filesize
64KB
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Filesize
7.7MB
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Filesize
7.7MB
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Filesize
64KB
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Filesize
7.7MB
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Filesize
7.7MB
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Filesize
7.7MB
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Filesize
7.7MB
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Filesize
64KB
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Filesize
64KB
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Filesize
7.7MB
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Filesize
7.7MB
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Filesize
64KB
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Filesize
40KB
-
Filesize
7.7MB
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Filesize
72KB
-
Filesize
408KB
-
Filesize
64KB
-
Filesize
7.7MB
-
Filesize
560KB
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Filesize
240KB
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Filesize
64KB
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Filesize
7.7MB
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Filesize
7.7MB
-
Filesize
104KB
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Filesize
6.5MB
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Filesize
40KB
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Filesize
304KB
-
Filesize
600KB
-
Filesize
68KB
-
Filesize
200KB
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Filesize
64KB
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Filesize
56KB
-
Filesize
80KB
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Filesize
32KB
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Filesize
104KB
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Filesize
7.7MB
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Filesize
64KB
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Filesize
652KB
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Filesize
120KB
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Filesize
6.2MB
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Filesize
64KB
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Filesize
120KB
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Filesize
304KB
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Filesize
3.3MB
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Filesize
408KB
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Filesize
136KB
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Filesize
64KB
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Filesize
216KB