Resubmissions

21-09-2022 20:38

220921-ze6ayshae5 10

21-09-2022 20:33

220921-zbzzrscfcl 10

General

  • Target

    ryuk.exe

  • Size

    885KB

  • Sample

    220921-zbzzrscfcl

  • MD5

    35194c73ff38dd6c3bed7c0efcff6826

  • SHA1

    1a1ebd30f4a3498cc09824b6fdfdf1b8d9ae9db1

  • SHA256

    5fce1d810a5e1c7536496c1b73eff77c9c3d92ac41f86959a1be5349663403ae

  • SHA512

    cf2ed61ffdfad8067aff8776e0dab1f27ea2551f7497108a6cca7eb0105a5f96ea1453dde29f488433cc645e55104d7397ee4f35db51526993823ef46763f28f

  • SSDEEP

    12288:CXrZ7kwy8U9JlpYqWYgeWYg955/155/0QebUlAAs7sKSAoSRn6X:C97ktflKgQKUKR7sKSAhN6

Malware Config

Extracted

Path

C:\ProgramData\RyukReadMe.txt

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 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. More than a year ago, world experts recognized the impossibility of deciphering by any means except the original decoder. No decryption software is available in the public. Antiviruse companies, researchers, IT specialists, and no other persons cant help you decrypt the data. DO NOT RESET OR SHUTDOWN - files may be damaged. DO NOT DELETE readme files. To confirm our honest intentions.Send 2 different random files and you will get it decrypted. It can be from different computers on your network to be sure that one key decrypts everything. 2 files we unlock for free To get info (decrypt your files) contact us at Recoverfile@aol.com or Recoverfile1@aol.com You will receive btc address for payment in the reply letter Ryuk No system is safe
Emails

Recoverfile@aol.com

Recoverfile1@aol.com

Targets

    • Target

      ryuk.exe

    • Size

      885KB

    • MD5

      35194c73ff38dd6c3bed7c0efcff6826

    • SHA1

      1a1ebd30f4a3498cc09824b6fdfdf1b8d9ae9db1

    • SHA256

      5fce1d810a5e1c7536496c1b73eff77c9c3d92ac41f86959a1be5349663403ae

    • SHA512

      cf2ed61ffdfad8067aff8776e0dab1f27ea2551f7497108a6cca7eb0105a5f96ea1453dde29f488433cc645e55104d7397ee4f35db51526993823ef46763f28f

    • SSDEEP

      12288:CXrZ7kwy8U9JlpYqWYgeWYg955/155/0QebUlAAs7sKSAoSRn6X:C97ktflKgQKUKR7sKSAhN6

    • Ryuk

      Ransomware distributed via existing botnets, often Trickbot or Emotet.

    • Disables Task Manager via registry modification

    • Drops startup file

    • Modifies file permissions

    • Enumerates connected drives

      Attempts to read the root path of hard drives other than the default C: drive.

MITRE ATT&CK Matrix ATT&CK v6

Execution

Scheduled Task

1
T1053

Persistence

Scheduled Task

1
T1053

Hidden Files and Directories

1
T1158

Privilege Escalation

Scheduled Task

1
T1053

Defense Evasion

File Permissions Modification

1
T1222

Hidden Files and Directories

1
T1158

Discovery

Query Registry

1
T1012

Peripheral Device Discovery

1
T1120

System Information Discovery

2
T1082

Tasks