General
- Target 2025-11-11_b260254b5f12dd88f7c6032ad4fff38a_njrat_ryuk
- Size 213KB
- Sample251111-nfenvatpgn
- SHA256 3e69a2dec173369677126163772d46575e9961794df9a1b2b5d2d97edb9b2539
- MD5 b260254b5f12dd88f7c6032ad4fff38a
- SHA1 b23b19c57ecdca02db2e63f42ab6741eb2bbd5d5
- SHA512 466f9ddc880cc8be54f8a708a8827d8e1fbd785728417b0d042e0459d89f200bf6cf6da7886f30e811a63621659faccd90cea4ef775f640dc81afa14d272181d
- SSDEEP 3072:+Ox8sc7Lzr/W2X3hMrP3WeGzZarDP0VEjzrQ9touP:n61Tr/W2HarP29UQYI
- MD5 SHA1 SHA512 SSDEEP
Static task
static1
1 signatures
Behavioral task
behavioral1
Sample
2025-11-11_b260254b5f12dd88f7c6032ad4fff38a_njrat_ryuk.exe
Resource
win10v2004-20251016-en
12 signatures
150 seconds
Behavioral task
behavioral2
Sample
2025-11-11_b260254b5f12dd88f7c6032ad4fff38a_njrat_ryuk.exe
Resource
win11-20250619-en
17 signatures
150 seconds
Malware Config
Extracted
Path
-
F:\RyukReadMe.txt
-
ryuk
Ransom Note
- Your network has been penetrated. All files on each host in the network have been encrypted with a strong algorithm. Backups were either encrypted or deleted or backup disks were formatted. Shadow copies also removed, so F8 or any other methods may damage encrypted data but not recover. We exclusively have decryption software for your situation No decryption software is available in the public. DO NOT RESET OR SHUTDOWN - files may be damaged. DO NOT RENAME OR MOVE the encrypted and readme files. DO NOT DELETE readme files. This may lead to the impossibility of recovery of the certain files. To get info (decrypt your files) contact us at [email protected] or [email protected] BTC wallet: 1KURvApbe1yC7qYxkkkvtdZ7hrNjdp18sQ Ryuk No system is safe
Wallets
-
1KURvApbe1yC7qYxkkkvtdZ7hrNjdp18sQ
Targets
-
- Target 2025-11-11_b260254b5f12dd88f7c6032ad4fff38a_njrat_ryuk
- Size 213KB
- SHA256 3e69a2dec173369677126163772d46575e9961794df9a1b2b5d2d97edb9b2539
- MD5 b260254b5f12dd88f7c6032ad4fff38a
- SHA1 b23b19c57ecdca02db2e63f42ab6741eb2bbd5d5
- SHA512 466f9ddc880cc8be54f8a708a8827d8e1fbd785728417b0d042e0459d89f200bf6cf6da7886f30e811a63621659faccd90cea4ef775f640dc81afa14d272181d
- SSDEEP 3072:+Ox8sc7Lzr/W2X3hMrP3WeGzZarDP0VEjzrQ9touP:n61Tr/W2HarP29UQYI
- MD5 SHA1 SHA512 SSDEEP
-
Ryuk family
-
Deletes shadow copies
Ransomware often targets backup files to inhibit system recovery.
-
Checks computer location settings
Looks up country code configured in the registry, likely geofence.
-
Drops startup file
-
Adds Run key to start application