Analysis
- max time kernel
143s - max time network
156s - platform
windows10-2004_x64 - resource
win10v2004-20220414-en - submitted
18/04/2022, 11:49
General
- Target 5e43890d2a5f7ccb9728e2eec8a030131c94be13d6358a85835806306ad44952.exe
- Size 716KB
- Sample220418-nzf11shdf5
- SHA256 5e43890d2a5f7ccb9728e2eec8a030131c94be13d6358a85835806306ad44952
Malware Config
Extracted
-
quasar
-
2.1.0.0
-
Mundo
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201.111.223.252:6700
-
VNM_MUTEX_KJflzK0oXUK0jjdJ05
-
encryption_key
eSgMT4XlUNEBcxqW7GsH
-
install_name
Client.exe
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log_directory
Logs
-
reconnect_delay
3000
-
startup_key
Venom Client Startup
-
subdirectory
SubDir
Signatures
- Contains code to disable Windows Defender 3 IoCs
A .NET executable tasked with disabling Windows Defender capabilities such as realtime monitoring, blocking at first seen, etc.
- Quasar Payload 3 IoCs
- Quasar RAT
Quasar is an open source Remote Access Tool.
- VenomRAT
VenomRAT is a modified version of QuasarRAT with some added features, such as rootkit and stealer capabilites.
- Executes dropped EXE 1 IoCs
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- Looks up external IP address via web service 1 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.
- Suspicious behavior: EnumeratesProcesses 2 IoCs
- Suspicious use of AdjustPrivilegeToken 3 IoCs
- Suspicious use of WriteProcessMemory 3 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\5e43890d2a5f7ccb9728e2eec8a030131c94be13d6358a85835806306ad44952.exe"C:\Users\Admin\AppData\Local\Temp\5e43890d2a5f7ccb9728e2eec8a030131c94be13d6358a85835806306ad44952.exe"1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\Pe.exe"C:\Users\Admin\AppData\Local\Temp\Pe.exe"2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
Pe.exe
Pe.exe
memory/1552-135-0x0000000000C70000-0x0000000000CFA000-memory.dmp
memory/1552-136-0x0000000005D60000-0x0000000006304000-memory.dmp
memory/1552-137-0x00000000056C0000-0x0000000005752000-memory.dmp
memory/1552-138-0x0000000005AB0000-0x0000000005B16000-memory.dmp
memory/1552-139-0x00000000066D0000-0x00000000066E2000-memory.dmp
memory/1552-140-0x0000000006B00000-0x0000000006B3C000-memory.dmp
memory/1552-141-0x0000000006CC0000-0x0000000006CCA000-memory.dmp
memory/2020-130-0x0000000000A70000-0x0000000000B28000-memory.dmp
memory/2020-131-0x00007FFBD4600000-0x00007FFBD50C1000-memory.dmp