General
- Target MasonClient.exe
- Size 49KB
- Sample260916-2k66jsfb63
- SHA256 3fd1677145bc6e50d8b9d26d5369360e84c9063edcf8aae7972ee029fd0d5e83
- MD5 d124ff038191eb90d3c747b945d3307f
- SHA1 8284b61252268780fb732a4b16d84193dc6e005d
- SHA512 08c32c463820de1d3bcaf456dac9354826aae098ebab4cf98581006ff13f39f980728aad41a9b268f5eecf73211ab9f05072e29ecf77d906a9221d68201e187b
- SSDEEP 1536:C3HEr1GtUtfuUnUk7XUNo57qp1XOcCXOchXOc8XOcVXOc1DVwZUOmUk+KmSKmwXP:C3HEr1GtUtfuUnUk7XUaZqp1XOcCXOc1
- TLSH T12733E78DE7D50121D6BF9EB119B31209C3B07AD34916C66F7CD841CB2B2BB984681BE7
- MD5 SHA1 SHA512 SSDEEP TLSH
Behavioral task
behavioral1
Sample
MasonClient.exe
Resource
win10v2004-20260911-en
Behavioral task
behavioral2
Sample
MasonClient.exe
Resource
win10ltsc2021-20260911-en
Behavioral task
behavioral3
Sample
MasonClient.exe
Resource
win11-20260911-en
Behavioral task
behavioral4
Sample
MasonClient.exe
Resource
win11ltsc2024-20260911-en
Malware Config
Extracted
-
neptunerat
-
188.209.211.120:8080
-
filename
USB.exe
-
group
MasonGroup
-
key
dzLRNpkgEBxWJ2Jm
-
rat_name
MasonRAT
Targets
-
- Target MasonClient.exe
- Size 49KB
- SHA256 3fd1677145bc6e50d8b9d26d5369360e84c9063edcf8aae7972ee029fd0d5e83
- MD5 d124ff038191eb90d3c747b945d3307f
- SHA1 8284b61252268780fb732a4b16d84193dc6e005d
- SHA512 08c32c463820de1d3bcaf456dac9354826aae098ebab4cf98581006ff13f39f980728aad41a9b268f5eecf73211ab9f05072e29ecf77d906a9221d68201e187b
- SSDEEP 1536:C3HEr1GtUtfuUnUk7XUNo57qp1XOcCXOchXOc8XOcVXOc1DVwZUOmUk+KmSKmwXP:C3HEr1GtUtfuUnUk7XUaZqp1XOcCXOc1
- TLSH T12733E78DE7D50121D6BF9EB119B31209C3B07AD34916C66F7CD841CB2B2BB984681BE7
- MD5 SHA1 SHA512 SSDEEP TLSH
-
Detects NeptuneRAT stealer
-
Boot or Logon Autostart Execution: Active Setup
Adversaries may achieve persistence by adding a Registry key to the Active Setup of the local machine.
-
Checks computer location settings
Looks up country code configured in the registry, likely geofence.
-
Executes dropped EXE
-
Adds Run key to start application
-
Enumerates connected drives
Attempts to read the root path of hard drives other than the default C: drive.
MITRE ATT&CK Enterprise v16
Persistence
Boot or Logon Autostart Execution
2Active Setup
1Registry Run Keys / Startup Folder
1Scheduled Task/Job
1Scheduled Task
1Privilege Escalation
Boot or Logon Autostart Execution
2Active Setup
1Registry Run Keys / Startup Folder
1Scheduled Task/Job
1Scheduled Task
1