Ransom.MSIL.BITPYLOCKER.A
Ransom:Win32/Genasom!MSR (MICROSOFT); HEUR:Trojan-Ransom.MSIL.Gen.gen (KASPERSKY)
Windows
Threat Type: Ransomware
Destructiveness: No
Encrypted: Yes
In the wild: Yes
OVERVIEW
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 encrypts files with specific file extensions. It drops files as ransom note.
TECHNICAL DETAILS
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 adds the following processes:
- "%System%\cmd.exe" /C choice /C Y /N /D Y /T 3 & Del "{Malware path}"
(Note: %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.)
Process Termination
This Ransomware terminates processes or services that contain any of the following strings if found running in the affected system's memory:
- backup
- cobain
- drop
- drive
- sql
- database
- vmware
- virtual
- agent
- anti
- iis
- web
- server
- apache
Ransomware Routine
This Ransomware encrypts files with the following extensions:
- 3ds
- 3fr
- 3g2
- 3gp
- 3pr
- 7z
- ab4
- accdb
- accde
- accdr
- accdt
- ach
- acr
- act
- adb
- ads
- agdl
- ai
- ait
- al
- apj
- arw
- asf
- asm
- asp
- aspx
- asx
- avi
- awg
- back
- backup
- backupdb
- bak
- bank
- bay
- bdb
- bgt
- bik
- bin
- bkf
- bkp
- blend
- bpw
- c
- cab
- cdf
- cdr
- cdr3
- cdr4
- cdr5
- cdr6
- cdrw
- cdx
- ce1
- ce2
- cer
- cfp
- cgm
- chm
- cib
- class
- cls
- cmt
- cnf
- conf
- cpi
- cpp
- cr2
- craw
- crt
- crw
- cs
- csh
- csl
- csv
- dac
- dat
- data
- db
- db-journal
- db3
- dbf
- dbx
- dc2
- dcr
- dcs
- ddd
- ddoc
- ddrw
- dds
- der
- des
- design
- dgc
- djvu
- dng
- doc
- docm
- docx
- dot
- dotm
- dotx
- drf
- drw
- dtd
- dwg
- dxb
- dxf
- dxg
- eml
- eps
- erbsql
- erf
- exf
- fdb
- ffd
- fff
- fh
- fhd
- fla
- flac
- flv
- fmb
- fpx
- frx
- fxg
- gif
- gray
- grey
- gry
- gz
- h
- hbk
- hpp
- htm
- html
- ibank
- ibd
- ibz
- idx
- iif
- iiq
- incpas
- indd
- jar
- java
- jin
- jpe
- jpeg
- jpg
- js
- jse
- jsp
- kc2
- kdbx
- kdc
- key
- kpdx
- log
- lua
- m
- m4v
- max
- mdb
- mdc
- mdf
- mef
- mfw
- mmw
- moneywell
- mos
- mov
- mp3
- mp4
- mpg
- mrw
- msg
- myd
- nd
- ndd
- 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
- oil
- orf
- ost
- otg
- oth
- otp
- ots
- ott
- p12
- p7b
- p7c
- pab
- pages
- pas
- pat
- pbl
- pcd
- pct
- pdb
- pdd
- pef
- pem
- pfx
- php
- pl
- plc
- png
- pot
- potm
- potx
- ppam
- pps
- ppsm
- ppsx
- ppt
- pptm
- pptx
- prf
- ps
- psafe3
- psd
- pspimage
- pst
- ptx
- py
- qba
- qbb
- qbm
- qbr
- qbw
- qbx
- qby
- r3d
- raf
- rar
- rat
- raw
- rdb
- rm
- rtf
- rw2
- rwl
- rwz
- s3db
- sas7bdat
- say
- sd0
- sda
- sdf
- sldm
- sldx
- sql
- sqlite
- sqlite3
- sqlitedb
- sr2
- srf
- srt
- srw
- st4
- st5
- st6
- st7
- st8
- std
- sti
- stw
- stx
- svg
- swf
- sxc
- sxd
- sxg
- sxi
- sxm
- sxw
- tex
- tga
- thm
- tif
- tlg
- txt
- vb
- vbs
- vmdk
- vmem
- vmsd
- vmsn
- vmx
- vmxf
- vob
- wallet
- war
- wav
- wb2
- wmv
- wpd
- wps
- x11
- x3f
- xis
- xla
- xlam
- xlk
- xlm
- xlr
- xls
- xlsb
- xlsm
- xlsx
- xlt
- xltm
- xltx
- xlw
- ycbcra
- yuv
- zip
It avoids encrypting files with the following strings in their file name:
- # HELP_TO_DECRYPT_YOUR_FILES #.html
It avoids encrypting files with the following strings in their file path:
- windows
- windows.old
- program files
- program files (x86)
- program data
- $recycle.bin
- system volume information
It appends the following extension to the file name of the encrypted files:
- .bitpy
It drops the following file(s) as ransom note:
- {Encrypted folder}\# HELP_TO_DECRYPT_YOUR_FILES #.html
SOLUTION
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:
- Troj.Win32.TRX.XXPE50FFF034
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 these files
- {Found drive}\temp0.bin
- {Encrypted folder}\# HELP_TO_DECRYPT_YOUR_FILES #.html
Step 5
Scan your computer with your Trend Micro product to delete files detected as Ransom.MSIL.BITPYLOCKER.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.
Did this description help? Tell us how we did.