General

  • Target

    2024-04-23_efeb1be8bd41130cd7c545010d140afa_babuk_mailto

  • Size

    94KB

  • Sample

    240423-a91lhsad87

  • MD5

    efeb1be8bd41130cd7c545010d140afa

  • SHA1

    a056845be51604a73cac17479f04d9077c202e05

  • SHA256

    4fb90e7f4baa933ad69be3abb36dbb586dc86e6162d7ac70a504a0c8942ea798

  • SHA512

    291c73ba102104a365c6769b8b29451a3594b06fbe65fe0a8f45d613981bb4ded5e23331ec65148c0a67a90de8fd0cc2c8379909bd2916f1f72cb2ddc68f934a

  • SSDEEP

    1536:NQVlCPQRhNs3POdM0ty2XGe0W7Pbk3sPkO5M/Y8fGMNvgaNg:NQ3CPAC/YM0tyAGe0WDPx9MNvg8g

Malware Config

Extracted

Path

C:\Program Files (x86)\Adobe\Acrobat Reader DC\3E4D0-Readme.txt

Family

netwalker

Ransom Note
Hi! Your files are encrypted. All encrypted files for this computer has extension: .3e4d0 -- If for some reason you read this text before the encryption ended, this can be understood by the fact that the computer slows down, and your heart rate has increased due to the ability to turn it off, then we recommend that you move away from the computer and accept that you have been compromised, rebooting/shutdown will cause you to lose files without the possibility of recovery and even god will not be able to help you, it could be files on the network belonging to other users, sure you want to take that responsibility? -- Our encryption algorithms are very strong and your files are very well protected, you can't hope to recover them without our help. The only way to get your files back is to cooperate with us and get the decrypter program. Do not try to recover your files without a decrypt program, you may damage them and then they will be impossible to recover. We advise you to contact us as soon as possible, otherwise there is a possibility that your files will never be returned. For us this is just business and to prove to you our seriousness, we will decrypt you some files for free, but we will not wait for your letter for a long time, mail can be abused, we are moving on, hurry up with the decision. Contact us: 1.knoocknoo@cock.li 2.eeeooppaaaxxx@tuta.io Don't forget to include your code in the email: {code_1b1ea859_3e4d0: l1o9mo7HVgkq0A2p5TVJ8Ouee3DccU4kFq4YAnpZayNoL9wA2Q z0Y69n4f0Fxi8JFDfLDiPwXJ/ELA82oijkS7xfr0VMqnUiWage GyK7n6LDMt/baxdHCQg+g6kS8BHTx6sxfdhfdCzbW2TKQSU74s WenXiAxVVfTSBUkobJAdirhhyGziixxfLT56hw5YKSeJX9Q79v /fvFrUMKGbSVQRcF81aoqZsiKyCsP8Ml4pLft1vUrkRDn5lOh1 chucNH1BS4fStYlc2iFJYu7REbu5ANM1g=}
Emails

knoocknoo@cock.li

eeeooppaaaxxx@tuta.io

Targets

    • Target

      2024-04-23_efeb1be8bd41130cd7c545010d140afa_babuk_mailto

    • Size

      94KB

    • MD5

      efeb1be8bd41130cd7c545010d140afa

    • SHA1

      a056845be51604a73cac17479f04d9077c202e05

    • SHA256

      4fb90e7f4baa933ad69be3abb36dbb586dc86e6162d7ac70a504a0c8942ea798

    • SHA512

      291c73ba102104a365c6769b8b29451a3594b06fbe65fe0a8f45d613981bb4ded5e23331ec65148c0a67a90de8fd0cc2c8379909bd2916f1f72cb2ddc68f934a

    • SSDEEP

      1536:NQVlCPQRhNs3POdM0ty2XGe0W7Pbk3sPkO5M/Y8fGMNvgaNg:NQ3CPAC/YM0tyAGe0WDPx9MNvg8g

    • Detected Netwalker Ransomware

      Detected unpacked Netwalker executable.

    • Netwalker Ransomware

      Ransomware family with multiple versions. Also known as MailTo.

    • Deletes shadow copies

      Ransomware often targets backup files to inhibit system recovery.

    • Renames multiple (566) files with added filename extension

      This suggests ransomware activity of encrypting all the files on the system.

    • Deletes itself

    • Adds Run key to start application

    • Suspicious use of SetThreadContext

MITRE ATT&CK Matrix ATT&CK v13

Persistence

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Defense Evasion

Indicator Removal

2
T1070

File Deletion

2
T1070.004

Modify Registry

1
T1112

Impact

Inhibit System Recovery

2
T1490

Tasks