Ransom.Win32.BITLOCKED.A
Trojan-Ransom.Tellyouthepass (Ikarus)
Windows
Threat Type: Ransomware
Destructiveness: No
Encrypted: No
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 connects to certain websites to send and receive information.
It encrypts files with specific file extensions. It drops files as ransom note.
TECHNICAL DETAILS
5,362,176 bytes
EXE
No
22 Mar 2019
Connects to URLs/IPs, Displays message/message boxes
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:
- %All Users Profile\windows -> contains personal ID
Other Details
This Ransomware connects to the following website to send and receive information:
- http://{BLOCKED}.{BLOCKED}.28.203/ok
It does the following:
- It encrypts files found in all drives.
- After encrypting a file and deleting its original file, it overwrites the content of the original file with random characters by creating and writing the original file again. Then it will delete this file again.
- It displays a command prompt window where it shows its progress.
Ransomware Routine
This Ransomware encrypts files with the following extensions:
- 1cd
- 3dm
- 3ds
- 3fr
- 3g2
- 3gp
- 3pr
- 602
- 7z
- ps1
- 7zip
- aac
- ab4
- accdb
- accde
- accdr
- accdt
- ach
- acr
- act
- adb
- adp
- ads
- aes
- agdl
- ai
- aiff
- ait
- al
- aoi
- apj
- arc
- arw
- asc
- asf
- asm
- asp
- aspx
- asx
- avi
- awg
- back
- backup
- backupdb
- bak
- bank
- bat
- bay
- bdb
- bgt
- bik
- bin
- bkp
- blend
- bmp
- bpw
- brd
- c
- cdf
- cdr
- cdr3
- cdr4
- cdr5
- cdr6
- cdrw
- cdx
- ce1
- ce2
- cer
- cfg
- cgm
- cib
- class
- cls
- cmd
- cmt
- config
- contact
- cpi
- cpp
- cr2
- craw
- crt
- crw
- cs
- csh
- csl
- csr
- css
- csv
- dac
- dat
- db
- db3
- db_journal
- dbf
- dbx
- dc2
- dch
- dcr
- dcs
- ddd
- ddoc
- ddrw
- dds
- der
- des
- design
- dgc
- dif
- dip
- dit
- djv
- djvu
- dng
- doc
- docb
- docm
- docx
- dot
- dotm
- dotx
- drf
- drw
- dtd
- dwg
- dxb
- dxf
- dxg
- edb
- eml
- eps
- erbsql
- erf
- exf
- fdb
- ffd
- fff
- fh
- fhd
- fla
- flac
- flf
- flv
- flvv
- fpx
- frm
- fxg
- gif
- gpg
- gray
- grey
- groups
- gry
- gz
- h
- hbk
- hdd
- hpp
- html
- hwp
- ibank
- ibd
- ibz
- idx
- iif
- iiq
- incpas
- indd
- jar
- java
- jnt
- jpe
- jpeg
- jpg
- js
- kc2
- kdbx
- kdc
- key
- kpdx
- kwm
- laccdb
- lay
- lay6
- ldf
- lit
- log
- lua
- m
- m2ts
- m3u
- m4p
- m4u
- m4v
- mapimail
- max
- mbx
- md
- mdb
- mdc
- mdf
- mef
- mfw
- mid
- mkv
- mlb
- mml
- mmw
- mny
- moneywell
- mos
- mov
- mp3
- mp4
- mpeg
- mpg
- mrw
- ms11
- msg
- myd
- myi
- nd
- ndd
- ndf
- nef
- nk2
- nop
- nrw
- ns2
- ns3
- ns4
- nsd
- nsf
- nsg
- nsh
- nvram
- nwb
- nx2
- nxl
- nyf
- oab
- obj
- odb
- odc
- odf
- odg
- odm
- odp
- ods
- odt
- ogg
- oil
- orf
- ost
- otg
- oth
- otp
- ots
- ott
- p12
- p7b
- p7c
- pab
- pages
- paq
- pas
- pat
- pcd
- pct
- pdb
- pdd
- pef
- pem
- pfx
- php
- pif
- pl
- plc
- plus_muhd
- png
- pot
- potm
- potx
- ppam
- pps
- ppsm
- ppsx
- ppt
- pptm
- pptx
- prf
- ps
- psafe3
- psd
- pspimage
- pst
- ptx
- pwm
- py
- qba
- qbb
- qbm
- qbr
- qbw
- qbx
- qby
- qcow
- qcow2
- qed
- r3d
- raf
- rar
- rat
- raw
- rb
- rdb
- rm
- rtf
- rvt
- rw2
- rwl
- rwz
- s3db
- safe
- sas7bdat
- sav
- save
- say
- sch
- sd0
- sda
- sdf
- sh
- sldm
- sldx
- slk
- sql
- sqlite
- sqlite3
- sqlitedb
- sr2
- srf
- srt
- srw
- st4
- st5
- st6
- st7
- st8
- stc
- std
- sti
- stm
- stw
- stx
- svg
- swf
- sxc
- sxd
- sxg
- sxi
- sxm
- sxw
- tar
- tar.bz2
- tbk
- tex
- tga
- tgz
- thm
- tif
- tiff
- tlg
- txt
- uop
- uot
- vb
- vbox
- vbs
- vdi
- vhd
- vhdx
- vmdk
- vmsd
- vmx
- vmxf
- vob
- wab
- wad
- wallet
- wav
- wb2
- wk1
- wks
- wma
- wmv
- wpd
- wps
- x11
- x3f
- xis
- xla
- xlam
- xlc
- xlk
- xlm
- xlr
- xls
- xlsb
- xlsm
- xlsx
- xlt
- xltm
- xltx
- xlw
- xml
- ycbcra
- yuv
- zip
It avoids encrypting files with the following strings in their file path:
- All Users
- AppData
- Boot
- bootfont.bin
- EFI\Boot
- EFI\Microsoft
- Local Settings
- Program Files
- ProgramData
- Recycle.Bin
- System Volume Information
- Windows
It appends the following extension to the file name of the encrypted files:
- .locked
It drops the following file(s) as ransom note:
- {encrypted folder}\README.html
SOLUTION
9.850
14.888.06
22 Mar 2019
14.889.00
23 Mar 2019
Step 1
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 2
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 3
Identify and terminate files detected as Ransom.Win32.BITLOCKED.A
- Windows Task Manager may not display all running processes. In this case, please use a third-party process viewer, preferably Process Explorer, to terminate the malware/grayware/spyware file. You may download the said tool here.
- If the detected file is displayed in either Windows Task Manager or Process Explorer but you cannot delete it, restart your computer in safe mode. To do this, refer to this link for the complete steps.
- If the detected file is not displayed in either Windows Task Manager or Process Explorer, continue doing the next steps.
Step 4
Search and delete this file
- %All Users Profile\windows
- {encrypted folder}\README.html
Step 5
Scan your computer with your Trend Micro product to delete files detected as Ransom.Win32.BITLOCKED.A. 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.
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