General
- Target 798.exe
- Size 250KB
- Sample261024-k568lsef57
- SHA256 2f5aecb75a4a9848101551aa300480462b07b1b5ffd54e4ef0d31b90965a2cd9
- MD5 1bfba743406a2bb4658eae387a9851c9
- SHA1 14b0a2863510d9a827edaccd3114a9877d00b72d
- SHA512 c4d7234d58a5cb740b2b3f818c9a7dc8a7acc1feaeac8ae979d51c12a84400b5fc158fbb6f1c39c1e93b5f2a064f7f044847ce586c75233e557fc76ba5e28856
- SSDEEP 6144:L/qK2eAFngHBY/23ly+x9G2aNdulXj72uRkub:L/4rxgg23XGNdulXHN
- TLSH T151446B2AED532C15C259C63FB836782DE6FFBD722326D19E6E0901B3FF4129846D4690
- MD5 SHA1 SHA512 SSDEEP TLSH
Static task
static1
Behavioral task
behavioral1
Sample
798.exe
Resource
win10v2004-20260911-en
Behavioral task
behavioral2
Sample
798.exe
Resource
win10ltsc2021-20260911-en
Behavioral task
behavioral3
Sample
798.exe
Resource
win11-20260911-en
Behavioral task
behavioral4
Sample
798.exe
Resource
win11ltsc2024-20260911-en
Malware Config
Extracted
-
neptunerat
-
193.161.193.99:45108
-
filename
USB.exe
-
group
MasonGroup
-
key
I3ujeNhtTGMSOz0g
-
rat_name
MasonRAT
Targets
-
- Target 798.exe
- Size 250KB
- SHA256 2f5aecb75a4a9848101551aa300480462b07b1b5ffd54e4ef0d31b90965a2cd9
- MD5 1bfba743406a2bb4658eae387a9851c9
- SHA1 14b0a2863510d9a827edaccd3114a9877d00b72d
- SHA512 c4d7234d58a5cb740b2b3f818c9a7dc8a7acc1feaeac8ae979d51c12a84400b5fc158fbb6f1c39c1e93b5f2a064f7f044847ce586c75233e557fc76ba5e28856
- SSDEEP 6144:L/qK2eAFngHBY/23ly+x9G2aNdulXj72uRkub:L/4rxgg23XGNdulXHN
- TLSH T151446B2AED532C15C259C63FB836782DE6FFBD722326D19E6E0901B3FF4129846D4690
- 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.
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Modifies visibility of hidden/system files in Explorer
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Suspicious use of NtCreateUserProcessOtherParentProcess
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Command and Scripting Interpreter: PowerShell
Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.
-
Checks computer location settings
Looks up country code configured in the registry, likely geofence.
-
Executes a file named after a Windows system binary
The file runs from a user directory while carrying the name of an executable that normally only exists in System32.
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Executes dropped EXE
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Adds Run key to start application
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Contacts third-party web service commonly abused for C2
Legitimate web (hosting) services can be abused by malware authors to host malware or C2s.
MITRE ATT&CK Enterprise v16
Execution
Command and Scripting Interpreter
1PowerShell
1Scheduled Task/Job
1Scheduled Task
1Persistence
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Scheduled Task/Job
1Scheduled Task
1Privilege Escalation
Access Token Manipulation
1Parent PID Spoofing
1Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Scheduled Task/Job
1Scheduled Task
1Defense Evasion
Access Token Manipulation
1Parent PID Spoofing
1Hide Artifacts
1Hidden Files and Directories
1Masquerading
1Match Legitimate Name or Location
1Modify Registry
2