General
- Target https://www.mediafire.com/folder/05tuzyl2dyhhu/NexusMods
- Sample260905-a34plaz1ft
Static task
static1
URLScan task
urlscan1
Behavioral task
behavioral1
Sample
https://www.mediafire.com/folder/05tuzyl2dyhhu/NexusMods
Resource
win10v2004-20260513-en
Malware Config
Targets
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- Target https://www.mediafire.com/folder/05tuzyl2dyhhu/NexusMods
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Chaos Ransomware
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UAC bypass
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Windows security bypass
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Deletes shadow copies
Ransomware often targets backup files to inhibit system recovery.
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Modifies boot configuration data using bcdedit
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Disables Task Manager via registry modification
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Downloads MZ/PE file
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Checks computer location settings
Looks up country code configured in the registry, likely geofence.
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Creates a file in the Startup directory
A file was written to a Windows startup folder. Files in these directories are executed automatically when a user logs on or an application initializes.
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Executes dropped EXE
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Loads dropped DLL
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Prevents Microsoft Defender from scanning certain paths by adding an exclusion.
Uses the Powershell Add-MpPreference cmdlet to exclude paths from being scanned by Microsoft Defender.
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System Binary Proxy Execution: Rundll32
Abuse Rundll32 to proxy execution of malicious code.
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Accesses cryptocurrency files/wallets, possible credential harvesting
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Checks installed software on the system
Looks up Uninstall key entries in the registry to enumerate software on the system.
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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.
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Drops desktop.ini file(s)
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Hide Artifacts: Hidden Window
Windows that would typically be displayed when an application carries out an operation can be hidden.
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Looks up external IP address via web service
Uses a legitimate IP lookup service to find the infected system's external IP.
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Obfuscated Files or Information: Command Obfuscation
Adversaries may obfuscate content during command execution to impede detection.
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Writes to the Master Boot Record (MBR)
Bootkits write to the MBR to gain persistence at a level below the operating system.
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Executes a VBScript file via the Windows Script Host.
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Sets desktop wallpaper using registry
MITRE ATT&CK Enterprise v16
Execution
Command and Scripting Interpreter
4PowerShell
1Visual Basic
1Windows Command Shell
1Windows Management Instrumentation
1Persistence
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Pre-OS Boot
1Bootkit
1Privilege Escalation
Abuse Elevation Control Mechanism
1Bypass User Account Control
1Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Defense Evasion
Abuse Elevation Control Mechanism
1Bypass User Account Control
1Direct Volume Access
1Hide Artifacts
3File/Path Exclusions
1Hidden Window
1Ignore Process Interrupts
1Impair Defenses
3Disable or Modify Tools
3Indicator Removal
3File Deletion
3Modify Registry
4Obfuscated Files or Information
1Command Obfuscation
1Pre-OS Boot
1Bootkit
1System Binary Proxy Execution
1Rundll32
1Credential Access
Credentials from Password Stores
1Credentials from Web Browsers
1Unsecured Credentials
3Credentials In Files
3Discovery
Browser Information Discovery
1Peripheral Device Discovery
1Query Registry
6Remote System Discovery
1System Information Discovery
5System Location Discovery
1System Language Discovery
1System Network Configuration Discovery
2Internet Connection Discovery
2System Time Discovery
1