Ransomware Research

About ABCD


ABCD was first discovered in December 2019 in enterprise cloud environments. ABCD is found in environments with a number of different names, including LockBit, LockBit 2.0, Lock2Bits, LuckyDay, etc. For a full list of all names, please see below.

  • LockBit
  • LockBit 2.0
  • Lock2Bits
  • LuckyDay
First Seen December 2019


To better understand ABCD, we can trace it’s origins. Below is a snapshot of ABCD’s genealogy.

LockerGoga » MegaCortex » ABCD » Lock2Bits

Behavior of ABCD

ABCD is known to target specific file types. Below are all known file types that ABCD is known to infect.

In some cases, ransomware will update the modified date, when it encrypts files. ABCD updates the last modified date of the file it targets.

Learn More

Characteristics of ABCD

Here are some of the unique characteristics that are helpful to know about ABCD.


Some ransomware will change or append a suffix to the end of the file after they are encrypted, including changing the extension of a file. Here are some of the possible suffixes that ABCD ransomware is known to change.

Suffixes.abcd, .lockbit, .lock2bits, .luckyday

Ransomware Notes

Not all ransomware leaves a note. However, some ransomware leaves the infected party instructions on what the user should do to get rid of the ransomware, or satisfy the ransom. This often involves transferring money, often bitcoin or another cryptocurrency to a designated wallet.

Below are the type(s) of notes, content, and typical locations where Elastio has found ransom notes from ABCD.

File NameRestore-My-Files.txt
File NameFile Recovery.txt


These are the names of the executables that contain the undetonated ransomware payload for ABCD.

ExecutablesLockbit.bin, 2.exe, PNDlqruXJSRDXAZ.exe, sh1.exe, t6FF4.exe1, tau777.exe, lb777.exe, mitigation Continuity, lkb99.exe, LockBIT_172375D30BE340B4.exe, LockBit_A9FB6E8B06F112C4.exe

External Pages

Ransomware often links to external pages such as payment pages, telegram contacts, etc. Below are some of the URLs Elastio has found to be associated with ABCD.

External Pages
  • http://lockbitks2tvnmwk.onion
  • http://luckydaynywoklzy.onion
  • http://lockbit-decryptor.com
  • mailto:goeila@countermail.com
  • mailto:gupzkz@cock.li
  • mailto:supportpc@cock.li
  • mailto:goodsupport@cock.li
  • mailto:help@countermail.com
  • mailto:pcabcd@countermail.com
  • mailto:recoverymanager@cock.li
How Elastio can help

Don’t let ransomware
take over your backups.

Elastio’s Cyber Recovery as a Service (CRaaS) software helps you detect, recover, and protect from ransomware attacks. The Elastio platform combines data security, protection and active ransomware recovery technology, offering you the most complete solution available. Gain full workload visibility, automated recovery testing, lower cloud costs and simplicity with Elastio’s cyber recovery solution.

Scroll to Top