General
- Target MasonClient.exe
- Size 48KB
- Sample261024-kr464aax6m
- SHA256 5d8fae478eff7164a85415b030a758cf623d9a64c7725ea10419933780e2273b
- MD5 c9518b770e62d4158aa1484ca547ef55
- SHA1 6f9f0fa9af80ab2e8c114aa09455f065074609fe
- SHA512 8623aa67fb8d1a27bbdc0b2e468b4859b3f595ec3f53536ea6786939b782271b529291b3df16442f11d14dc3fcf2c138cbcab2c55c6dddc45b08dc44020aeb44
- SSDEEP 1536:HQIcwHftUSnHU9U2+uUiGS9GfXOcMXOcXXOcBXOcgXOcutCmUOnUk+Hm9nmdXOch:wIcwHftUSnHU9U2+uUxS9GfXOcMXOcXa
- TLSH T19323C68DE7D50121D6BF9EF119B31209C3B06AD34856C66F7CD801CB2B2AB994681FE7
- MD5 SHA1 SHA512 SSDEEP TLSH
Behavioral task
behavioral1
Sample
MasonClient.exe
Resource
win10v2004-20260911-en
Malware Config
Extracted
-
neptunerat
-
jhhmcdxi4o.localto.net:2547
-
filename
USB.exe
-
group
MasonGroup
-
key
E6eknZOGNhzlMLIX
-
rat_name
MasonRAT
Targets
-
- Target MasonClient.exe
- Size 48KB
- SHA256 5d8fae478eff7164a85415b030a758cf623d9a64c7725ea10419933780e2273b
- MD5 c9518b770e62d4158aa1484ca547ef55
- SHA1 6f9f0fa9af80ab2e8c114aa09455f065074609fe
- SHA512 8623aa67fb8d1a27bbdc0b2e468b4859b3f595ec3f53536ea6786939b782271b529291b3df16442f11d14dc3fcf2c138cbcab2c55c6dddc45b08dc44020aeb44
- SSDEEP 1536:HQIcwHftUSnHU9U2+uUiGS9GfXOcMXOcXXOcBXOcgXOcutCmUOnUk+Hm9nmdXOch:wIcwHftUSnHU9U2+uUxS9GfXOcMXOcXa
- TLSH T19323C68DE7D50121D6BF9EF119B31209C3B06AD34856C66F7CD801CB2B2AB994681FE7
- MD5 SHA1 SHA512 SSDEEP TLSH
-
Detects NeptuneRAT stealer
-
UAC bypass
-
Disables Task Manager via registry modification
-
Checks computer location settings
Looks up country code configured in the registry, likely geofence.
-
Executes dropped EXE
-
Adds Run key to start application
-
Checks whether UAC is enabled
-
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
Persistence
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Pre-OS Boot
1Bootkit
1Scheduled Task/Job
1Scheduled Task
1Privilege Escalation
Abuse Elevation Control Mechanism
1Bypass User Account Control
1Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Scheduled Task/Job
1Scheduled Task
1Defense Evasion
Abuse Elevation Control Mechanism
1Bypass User Account Control
1Direct Volume Access
1Impair Defenses
1Disable or Modify Tools
1Modify Registry
3Pre-OS Boot
1Bootkit
1