Type
File Name
Location
BigLock was first discovered in May 2020 in enterprise cloud environments. BigLock is found in environments with a number of different names, including CoronaLock, Corona-lock, CoronaLocker, etc. For a full list of all names, please see below.
Name
BigLock
First Seen
May 2020
BigLock is known to target specific file types. Below are all known file types that BigLock is known to infect.
In some cases, ransomware will update the modified date, when it encrypts files. BigLock updates the last modified date of the file it targets.
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 BigLock ransomware is known to change.
Suffixes
.biglock, .corona-lock, .pandemic, .systems32x, .nermer, .t1000, .t800
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 BigLock.
Type File Name Location file README_LOCK.TXT Desktop file @_FILES_WERE_ENCRYPTED_@.TXT EveryFolder file @_HOW_TO_DECRYPT_FILES_@.TXT EveryFolder file @_HOW_TO_PAY_THE_RANSOM_@.TXT EveryFolder file PROTECT_INFO.TXT Desktop file CRYPTiNFO.TXT Desktop
These are the names of the executables that contain the undetonated ransomware payload for BigLock.
Executables
2020-05-22_17-36-19.exe, covidworldcry.exe, DUMo, setup_theme_895670451.bin, lkx333.exe, convimage.exe, locker.exe, drvintel.exe, SysLogsService.exe, cmd.exe
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 BigLock.
External Pages
