General
- Target https://gofile.io/d/i2Gc7uW5
- Sample261104-hhmvcacf92
Static task
static1
URLScan task
urlscan1
Behavioral task
behavioral1
Sample
https://gofile.io/d/i2Gc7uW5
Resource
win10v2004-20260911-en
Malware Config
Extracted
-
neptunerat
-
2.57.19.42:818
-
filename
MasonUSB.exe
-
group
MasonGroup
-
key
DsKcRUxvrzkF9yJ8
-
rat_name
MasonRAT
Extracted
-
umbral
-
v1.3
-
https://canary.discord.com/api/webhooks/1562473509593153577/r7i5tm1sbgZRZEuumb2MFbh7ZKceAC_yRpQBDMlMQqlXzqSBaR9meo_ynD23pH3kk4L5
Targets
-
- Target https://gofile.io/d/i2Gc7uW5
Detects NeptuneRAT stealer
Detects Umbral payload
Downloads MZ/PE file
Sets service image path in registry
This determines the executable launched when a service starts. It can be used to establish persistence.
Checks BIOS information in registry
BIOS information is often read in order to detect sandboxing environments.
Checks computer location settings
Looks up country code configured in the registry, likely geofence.
Executes dropped EXE
Indicator Removal: Clear Windows Event Logs
Clear Windows Event Logs to hide the activity of an intrusion.
Adds Run key to start application
Contacts third-party web service commonly abused for C2
Legitimate web (hosting) services can be abused by malware authors to host malware or C2s.
Looks up external IP address via web service
Uses a legitimate IP lookup service to find the infected system's external IP.
Writes to the Master Boot Record (MBR)
Bootkits write to the MBR to gain persistence at a level below the operating system.
Drops file in System32 directory
MITRE ATT&CK Enterprise v16
Execution
Command and Scripting Interpreter
1Windows Command Shell
1Scheduled Task/Job
1Scheduled Task
1Windows Management Instrumentation
1Persistence
Boot or Logon Autostart Execution
2Registry Run Keys / Startup Folder
2Create or Modify System Process
1Windows Service
1Pre-OS Boot
1Bootkit
1Scheduled Task/Job
1Scheduled Task
1Privilege Escalation
Boot or Logon Autostart Execution
2Registry Run Keys / Startup Folder
2Create or Modify System Process
1Windows Service
1Scheduled Task/Job
1Scheduled Task
1Defense Evasion
Indicator Removal
1Clear Windows Event Logs
1Modify Registry
2Pre-OS Boot
1Bootkit
1Discovery
Browser Information Discovery
1Peripheral Device Discovery
2Query Registry
6System Information Discovery
7System Location Discovery
1System Language Discovery
1System Network Configuration Discovery
2Internet Connection Discovery
1System Time Discovery
1