General
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Target
https://github.com/NotReal96/Malware/blob/master/MrsMajor.md
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Sample
241222-zmtxwsyqdl
Static task
static1
URLScan task
urlscan1
Behavioral task
behavioral1
Sample
https://github.com/NotReal96/Malware/blob/master/MrsMajor.md
Resource
win11-20241007-en
Malware Config
Extracted
C:\Users\Admin\Downloads\WannaCry\@[email protected]
wannacry
12t9YDPgwueZ9NyMgw519p7AA8isjr6SMw
Targets
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Target
https://github.com/NotReal96/Malware/blob/master/MrsMajor.md
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Wannacry family
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Deletes shadow copies
Ransomware often targets backup files to inhibit system recovery.
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Downloads MZ/PE file
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Drops startup file
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Executes dropped EXE
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Loads dropped DLL
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Modifies file permissions
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Obfuscated with Agile.Net obfuscator
Detects use of the Agile.Net commercial obfuscator, which is capable of entity renaming and control flow obfuscation.
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Adds Run key to start application
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File and Directory Permissions Modification: Windows File and Directory Permissions Modification
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Legitimate hosting services abused for malware hosting/C2
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Sets desktop wallpaper using registry
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MITRE ATT&CK Enterprise v15
Privilege 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
1File and Directory Permissions Modification
2Windows File and Directory Permissions Modification
1Hide Artifacts
1Hidden Files and Directories
1Impair Defenses
1Disable or Modify Tools
1Indicator Removal
1File Deletion
1Modify Registry
6Subvert Trust Controls
1SIP and Trust Provider Hijacking
1Credential Access
Credentials from Password Stores
1Credentials from Web Browsers
1Unsecured Credentials
1Credentials In Files
1