Ransom.Win32.LOCKBIT.YXEDKZ
Ransom:Win32/Conti.AD!MTB (MICROSOFT)
Windows
Threat Type: Ransomware
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
Downloaded from the Internet, Dropped by other malware
This Ransomware arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
It drops files as ransom note.
TECHNICAL DETAILS
237,568 bytes
EXE
No
11 Apr 2024
Encrypts files, Drops files
Arrival Details
This Ransomware arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
Installation
This Ransomware drops the following files:
- {Log File Path}\{Log Filename} → If -log is used
It adds the following processes:
- cmd.exe %System%\wbem\WMIC.exe shadowcopy where "ID={Shadow Copy ID}" delete → It will repeat this process depending on the number of shadow copies.
(Note: %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.)
It adds the following mutexes to ensure that only one of its copies runs at any one time:
- hsfjuukjzloqu28oajh727190
Other Details
This Ransomware does the following:
- By default, it encrypts local drives, removable drives, and network shares.
- When encrypting network shares it will check if the IP address starts with the following to ensure that it is encrypting local, non-internet, systems:
- 172.
- 192.168.
- 10.
- 169.
- It encrypts database storage files by looking for the following strings in their file path:
- .4dd
- .4dl
- .accdb
- .accdc
- .accde
- .accdr
- .accdt
- .accft
- .adb
- .ade
- .adf
- .adp
- .arc
- .ora
- .alf
- .ask
- .btr
- .bdf
- .cat
- .cdb
- .ckp
- .cma
- .cpd
- .dacpac
- .dad
- .dadiagrams
- .daschema
- .db
- .db-shm
- .db-wal
- .db3
- .dbc
- .dbf
- .dbs
- .dbt
- .dbv
- .dbx
- .dcb
- .dct
- .dcx
- .ddl
- .dlis
- .dp1
- .dqy
- .dsk
- .dsn
- .dtsx
- .dxl
- .eco
- .ecx
- .edb
- .epim
- .exb
- .fcd
- .fdb
- .fic
- .fmp
- .fmp12
- .fmpsl
- .fol
- .fp3
- .fp4
- .fp5
- .fp7
- .fpt
- .frm
- .gdb
- .grdb
- .gwi
- .hdb
- .his
- .ib
- .idb
- .ihx
- .itdb
- .itw
- .jet
- .jtx
- .kdb
- .kexi
- .kexic
- .kexis
- .lgc
- .lwx
- .maf
- .maq
- .mar
- .mas
- .mav
- .mdb
- .mdf
- .mpd
- .mrg
- .mud
- .mwb
- .myd
- .ndf
- .nnt
- .nrmlib
- .ns2
- .ns3
- .ns4
- .nsf
- .nv
- .nv2
- .nwdb
- .nyf
- .odb
- .oqy
- .orx
- .owc
- .p96
- .p97
- .pan
- .pdb
- .pdm
- .pnz
- .qry
- .qvd
- .rbf
- .rctd
- .rod
- .rodx
- .rpd
- .rsd
- .sas7bdat
- .sbf
- .scx
- .sdb
- .sdc
- .sdf
- .sis
- .spq
- .sql
- .sqlite
- .sqlite3
- .sqlitedb
- .te
- .temx
- .tmd
- .tps
- .trc
- .trm
- .udb
- .udl
- .usr
- .v12
- .vis
- .vpd
- .vvv
- .wdb
- .wmdb
- .wrk
- .xdb
- .xld
- .xmlff
- .abcddb
- .abs
- .abx
- .accdw
- .adn
- .db2
- .fm5
- .hjt
- .icg
- .icr
- .kdb
- .lut
- .maw
- .mdn
- .mdt
- It encrypts disk image files by looking for the following file extensions in their file path:
- .vdi
- .vhd
- .vmdk
- .pvm
- .vmem
- .vmsn
- .vmsd
- .nvram
- .vmx
- .raw
- .qcow2
- .subvol
- .bin
- .vsv
- .avhd
- .vmrs
- .vhdx
- .avdx
- .vmcx
- .iso
- It uses the Windows Restart Manager to unlock files it will encrypt.
It accepts the following parameters:
- -p {Directory} → Encrypts the specific directory first
- -size {chunk mode}
- -log {Log File Path}\{Log Filename} → Log output to {Log File Path}\{Log Filename}
- -nomutex → No mutex will be created
- -m → {all|local|net|backups}
- all → combination of net and local
- local → delete backups and encrypt only locally found drives
- net → delete backups and encrypt only network shares
- backups → delete backups
- -q → Does not append extension to encrypted files and won't drop the ransom note.
Ransomware Routine
This Ransomware avoids encrypting files with the following strings in their file name:
- .exe
- .dll
- .lnk
- .sys
- .msi
- !!!-Restore-My-Files-!!!.txt
- CONTI_LOG.txt
- .bat
- .3545c5e9
It avoids encrypting files with the following strings in their file path:
- tmp
- winnt
- temp
- thumb
- $Recycle.Bin
- $RECYCLE.BIN
- System Volume Information
- Boot
- Windows
- Trend Micro
- perflogs
It appends the following extension to the file name of the encrypted files:
- .3545c5e9
It drops the following file(s) as ransom note:
- {Encrypted Directory}\!!!-Restore-My-Files-!!!.txt
SOLUTION
9.800
19.273.00
11 Apr 2024
19.273.00
12 Apr 2024
Step 1
Trend Micro Predictive Machine Learning detects and blocks malware at the first sign of its existence, before it executes on your system. When enabled, your Trend Micro product detects this malware under the following machine learning name:
- Ransom.Win32.TRX.XXPE50FFF079
Step 2
Before doing any scans, Windows 7, Windows 8, Windows 8.1, and Windows 10 users must disable System Restore to allow full scanning of their computers.
Step 3
Note that not all files, folders, and registry keys and entries are installed on your computer during this malware's/spyware's/grayware's execution. This may be due to incomplete installation or other operating system conditions. If you do not find the same files/folders/registry information, please proceed to the next step.
Step 4
Search and delete this file
- {Log File Path}\{Log Filename}
- {Encrypted Directory}\!!!-Restore-My-Files-!!!.txt
Step 5
Scan your computer with your Trend Micro product to delete files detected as Ransom.Win32.LOCKBIT.YXEDKZ. If the detected files have already been cleaned, deleted, or quarantined by your Trend Micro product, no further step is required. You may opt to simply delete the quarantined files. Please check the following Trend Micro Support pages for more information:
Step 6
Restore encrypted files from backup.
Did this description help? Tell us how we did.