General
- Target Bypassed.exe
- Size 3.0MB
- Sample260723-pq3n4aba49
- SHA256 d1a8f947732fa87ece61bd3b380246229a5f065561d3814cfa8cba5673c14ba3
- MD5 5fd4ff65b965ac6dead02257b107ebbb
- SHA1 65f57fdc25f8821b794f6f8c24aee3ff2182a16a
- SHA512 45aa94954b1ea3c007da9b7177f750b21dca901690a5607b8de742b3333454a9da047408ac6bd9b24fbfcb0ce6dea46ed6b47d69cb24b7da2ff84b841bdb8c35
- SSDEEP 49152:e45n60CMVDMcPnVk2uAJ9WswnqNgwOirQTJyMg2x:
- TLSH T1B6E5962439FF501DB3B3AEAA5FD4B9AF9D5EF633270B20B9106103468722D819D91739
- MD5 SHA1 SHA512 SSDEEP TLSH
Static task
static1
Behavioral task
behavioral1
Sample
Bypassed.exe
Resource
win10v2004-20260513-en
Behavioral task
behavioral2
Sample
Bypassed.exe
Resource
win11ltsc2024-20260709-en
Malware Config
Extracted
-
neptunerat
-
russn-48812.portmap.host:48812
-
filename
USB.exe
-
group
MasonGroup
-
key
FMyLVvjBTyADMJTG
-
rat_name
MasonRAT
Targets
-
- Target Bypassed.exe
- Size 3.0MB
- SHA256 d1a8f947732fa87ece61bd3b380246229a5f065561d3814cfa8cba5673c14ba3
- MD5 5fd4ff65b965ac6dead02257b107ebbb
- SHA1 65f57fdc25f8821b794f6f8c24aee3ff2182a16a
- SHA512 45aa94954b1ea3c007da9b7177f750b21dca901690a5607b8de742b3333454a9da047408ac6bd9b24fbfcb0ce6dea46ed6b47d69cb24b7da2ff84b841bdb8c35
- SSDEEP 49152:e45n60CMVDMcPnVk2uAJ9WswnqNgwOirQTJyMg2x:
- TLSH T1B6E5962439FF501DB3B3AEAA5FD4B9AF9D5EF633270B20B9106103468722D819D91739
- MD5 SHA1 SHA512 SSDEEP TLSH
-
Detects DonutLoader
-
Detects NeptuneRAT stealer
-
Family: DonutLoader
DonutLoader is a position-independent code that enables in-memory execution of VBScript, JScript, EXE, DLL files and dotNET assemblies.
-
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.
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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.
-
Drops desktop.ini file(s)
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Enumerates connected drives
Attempts to read the root path of hard drives other than the default C: drive.
-
Writes to the Master Boot Record (MBR)
Bootkits write to the MBR to gain persistence at a level below the operating system.
-
Checks system information in the registry
System information is often read in order to detect sandboxing environments.
-
Drops file in System32 directory
-
Hide Artifacts: Hidden Files and Directories
MITRE ATT&CK Enterprise v16
Execution
Command and Scripting Interpreter
1Windows Command Shell
1Scheduled Task/Job
1Scheduled Task
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
Hide Artifacts
2Hidden Files and Directories
2Indicator Removal
1Clear Windows Event Logs
1Modify Registry
3Pre-OS Boot
1Bootkit
1