Analysis
- max time kernel
145s - max time network
151s - platform
windows10-2004_x64 - resource
win10v2004-20220414-en - submitted
18/04/2022, 11:55
General
- Target 9c8ea131bde14b5038358c608f55b0238e3610ceb8503b32527ae936221e862e.exe
- Size 725KB
- Sample220418-n3ex5aechl
- SHA256 9c8ea131bde14b5038358c608f55b0238e3610ceb8503b32527ae936221e862e
Malware Config
Extracted
-
quasar
-
2.1.0.0
-
Mundo
-
201.111.223.252:6700
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VNM_MUTEX_KJflzK0oXUK0jjdJ05
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encryption_key
eSgMT4XlUNEBcxqW7GsH
-
install_name
Client.exe
-
log_directory
Logs
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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.
- suricata: ET MALWARE W32/Quasar 1.3/Venom RAT Connectivity Check 3
suricata: ET MALWARE W32/Quasar 1.3/Venom RAT Connectivity Check 3
- Executes dropped EXE 2 IoCs
- Checks computer location settings 2 TTPs 2 IoCs
Looks up country code configured in the registry, likely geofence.
- 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.
- Suspicious behavior: EnumeratesProcesses 4 IoCs
- Suspicious use of AdjustPrivilegeToken 4 IoCs
- Suspicious use of WriteProcessMemory 5 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\9c8ea131bde14b5038358c608f55b0238e3610ceb8503b32527ae936221e862e.exe"C:\Users\Admin\AppData\Local\Temp\9c8ea131bde14b5038358c608f55b0238e3610ceb8503b32527ae936221e862e.exe"1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\NordVPN.exe"C:\Users\Admin\AppData\Local\Temp\NordVPN.exe"2⤵
- Executes dropped EXE
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\Pe.exe"C:\Users\Admin\AppData\Local\Temp\Pe.exe"3⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
NordVPN.exe
NordVPN.exe
Pe.exe
Pe.exe
memory/2492-140-0x000000001C844000-0x000000001C846000-memory.dmp
memory/2492-136-0x00000000000C0000-0x000000000016E000-memory.dmp
memory/2492-137-0x00007FFDC6C40000-0x00007FFDC7701000-memory.dmp
memory/2492-138-0x000000001C840000-0x000000001C842000-memory.dmp
memory/2492-139-0x000000001C842000-0x000000001C844000-memory.dmp
memory/3288-144-0x0000000000F00000-0x0000000000F8A000-memory.dmp
memory/3288-145-0x0000000006020000-0x00000000065C4000-memory.dmp
memory/3288-146-0x00000000059A0000-0x0000000005A32000-memory.dmp
memory/3288-147-0x0000000005D70000-0x0000000005DD6000-memory.dmp
memory/3288-148-0x0000000006A70000-0x0000000006A82000-memory.dmp
memory/3288-149-0x0000000006E90000-0x0000000006E9A000-memory.dmp
memory/3520-130-0x00000000007A0000-0x0000000000858000-memory.dmp
memory/3520-133-0x000000001C100000-0x000000001C102000-memory.dmp
memory/3520-131-0x00007FFDC6C40000-0x00007FFDC7701000-memory.dmp