RANSOM_REDCRYP.A
PHP/Obfuscated.F(Eset-NOD32);PHP.Ransom.B(Quickheal)
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 drops the following files:
- {Malware directory}\{Malware File name}.bmp ← used as wallpaper
- {Malware directory}\{Malware File name}.db ← list of encrypted files
Other System Modifications
This Ransomware changes the desktop wallpaper by modifying the following registry entries:
HKEY_CURRENT_USER\Control Panel\Desktop
Wallpaper = {Malware Directory}\{Malware file name}.bmp
It sets the system's desktop wallpaper to the following image:
Other Details
This Ransomware does the following:
- Display the following window as ransom note:
Ransomware Routine
This Ransomware encrypts files with the following extensions:
- 123
- 602
- dif
- docb
- docm
- dot
- dotm
- dotx
- hwp
- mml
- odg
- odp
- ods
- otg
- otp
- ots
- ott
- pot
- potm
- potx
- ppam
- ppsm
- ppsx
- pptm
- sldm
- sldx
- slk
- stc
- std
- sti
- stw
- sxc
- sxd
- sxm
- sxw
- txt
- uop
- uot
- wb2
- wk1
- wks
- xlc
- xlm
- xlsb
- xlsm
- xlt
- xltm
- xltx
- xlw
- xml
- asp
- bat
- brd
- c
- cmd
- dch
- dip
- jar
- js
- rb
- sch
- sh
- vbs
- 3g2
- fla
- m4u
- swf
- bmp
- cgm
- djv
- gif
- nef
- png
- db
- dbf
- frm
- ibd
- ldf
- myd
- myi
- onenotec2
- sqlite3
- sqlitedb
- paq
- tbk
- tgz
- 3dm
- asc
- lay
- lay6
- ms11
- ms11
- crt
- csr
- key
- p12
- pem
- qcow2
- vmx
- aes
- zip
- rar
- r00
- r01
- r02
- r03
- 7z
- tar
- gz
- gzip
- arc
- arj
- bz
- bz2
- bza
- bzip
- bzip2
- ice
- xls
- xlsx
- doc
- docx
- djvu
- fb2
- rtf
- ppt
- pptx
- pps
- sxi
- odm
- odt
- mpp
- ssh
- pub
- gpg
- pgp
- kdb
- kdbx
- als
- aup
- cpr
- npr
- cpp
- bas
- asm
- cs
- php
- pas
- class
- py
- pl
- h
- vb
- vcproj
- vbproj
- java
- bak
- backup
- mdb
- accdb
- mdf
- odb
- wdb
- csv
- tsv
- sql
- psd
- eps
- cdr
- cpt
- indd
- dwg
- ai
- svg
- max
- skp
- scad
- cad
- 3ds
- blend
- lwo
- lws
- mb
- slddrw
- sldasm
- sldprt
- u3d
- jpg
- jpeg
- tiff
- tif
- raw
- avi
- mpg
- mp4
- m4v
- mpeg
- mpe
- wmf
- wmv
- veg
- mov
- 3gp
- flv
- mkv
- vob
- rm
- mp3
- wav
- asf
- wma
- m3u
- midi
- ogg
- mid
- vdi
- vmdk
- vhd
- dsk
- img
- iso
It avoids encrypting files with the following strings in their file path:
- winnt
- boot
- system
- windows
- tmp
- temp
- program
- appdata
- application
- roaming
- msoffice
- temporary
- cache
It drops the following file(s) as ransom note:
- {Malware directory}\{Malware File name}.hta
SOLUTION
Step 1
Before doing any scans, Windows XP, Windows Vista, and Windows 7 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
Search and delete this file
- {Malware directory}\{Malware File name}.db
- {Malware directory}\{Malware File name}.bmp
- {Malware directory}\{Malware File name}.hta
Step 4
Scan your computer with your Trend Micro product to delete files detected as RANSOM_REDCRYP.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 this Knowledge Base page for more information.
Step 5
Reset your Desktop properties
Step 6
Restore encrypted files from backup.
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