Analysis
- max time kernel
146s - max time network
152s - platform
windows10-2004_x64 - resource
win10v2004-20220414-en - resource tags
- submitted
18/07/2022, 11:22
General
- Target bfaa90c6e3aacd9d9b83a4f8f0f74b0a.exe
- Size 534KB
- Sample220718-ngltjsdaan
- SHA256 6d00a6b8d581813e8af3114968274f89978b40d400c8eef2bf7e09192f5ec9e6
Malware Config
Extracted
-
quasar
-
2.1.0.0
-
Office04
-
127.0.0.1:4782
-
VNM_MUTEX_c2q7y2ayYutZ2XaYe7
-
encryption_key
NTih4UsOfv91J9azm70k
-
install_name
Client.exe
-
log_directory
Logs
-
reconnect_delay
3000
-
startup_key
Venom Client Startup
-
subdirectory
SubDir
Signatures
- 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.
- Quasar RAT
Quasar is an open source Remote Access Tool.
- Quasar payload 1 IoCs
- 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 2
suricata: ET MALWARE W32/Quasar 1.3/Venom RAT Connectivity Check 2
- suricata: ET MALWARE W32/Quasar 1.3/Venom RAT Connectivity Check 3
suricata: ET MALWARE W32/Quasar 1.3/Venom RAT Connectivity Check 3
- Looks up external IP address via web service 2 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
- Suspicious use of AdjustPrivilegeToken 2 IoCs
- Suspicious use of SetWindowsHookEx 1 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\bfaa90c6e3aacd9d9b83a4f8f0f74b0a.exe"C:\Users\Admin\AppData\Local\Temp\bfaa90c6e3aacd9d9b83a4f8f0f74b0a.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
Network
MITRE ATT&CK Matrix
Replay Monitor
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Downloads
memory/2288-130-0x0000000000360000-0x00000000003EC000-memory.dmp
memory/2288-131-0x0000000005300000-0x00000000058A4000-memory.dmp
memory/2288-132-0x0000000004DF0000-0x0000000004E82000-memory.dmp
memory/2288-133-0x0000000005190000-0x00000000051F6000-memory.dmp
memory/2288-134-0x0000000005DC0000-0x0000000005DD2000-memory.dmp
memory/2288-135-0x0000000006820000-0x000000000682A000-memory.dmp