RANSOM.WIN32.FLYTERPER.THIOGAH
Ransom:MSIL/Ryzerlo.A (Microsoft) ; Gen:Heur.Ransom.REntS.Gen.1 (Bitdefender)
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 encrypts files found in specific folders. It drops files as ransom note.
TECHNICAL DETAILS
228,864 bytes
EXE
No
29 Aug 2018
Collects system information, Connects to URLs/IPs, Creates files, Displays message/message boxes, Steals information, 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 copies of itself into the affected system:
- C:\{Username}\run11\local.exe.CRYPTR
It creates the following folders:
- C:\{Username}\run11
Other System Modifications
This Ransomware changes the desktop wallpaper by modifying the following registry entries:
HKEY_CURRENT_USER\Control Panel\Desktop
Wallpaper = C:\{Username}\CRYPTR.jpg
It sets the system's desktop wallpaper to the following image:
Download Routine
This Ransomware accesses the following websites to download files:
- https://{BLOCKED}.{BLOCKED}r.com/0i1ZFth.jpg
It saves the files it downloads using the following names:
- C:\{Username}\CRYPTR.jpg
Information Theft
This Ransomware gathers the following data:
- Computer Name
- Username
Other Details
This Ransomware connects to the following website to send and receive information:
- https://{BLOCKED}0r.{BLOCKED}pp.com/access/access.php?info=
Ransomware Routine
This Ransomware encrypts files with the following extensions:
- .txt
- .jar
- .exe
- .dat
- .contact
- .settings
- .doc
- .docx
- .xls
- .xlsx
- .ppt
- .pptx
- .odt
- .jpg
- .png
- .csv
- .py
- .sql
- .sqlite
- .sqlite3
- .mdb
- .sln
- .php
- .asp
- .aspx
- .html
- .htm
- .xml
- .psd
- .dll
- .c
- .cs
- .mp3
- .mp4
- .f3d
- .dwg
- .cpp
- .zip
- .rar
- .mov
- .rtf
- .bmp
- .mkv
- .avi
- .apk
- .lnk
- .iso
- .7-zip
- .ace
- .arj
- .bz2
- .cab
- .gzip
- .lzh
- .tar
- .uue
- .xz
- .z
- .001
- .mpeg
- .mpg
- .core
- .crproj
- .pdb
- .ico
- .pas
- .db
- .torrent
- .file
- .jquery
- .css
- .md
- .pl
- .pyw
- .key
- .bin
- .phtml
- .php2
- .php3
- .php4
- .php5
- .gpg
- .webm
- .rc
- .rb
- .js
- .java
- .lst
- .settingcontent-ms
- .bash
- .bashrc
- .bash_profil
- .bat
- .jso
- .py.old
- .vb
- .vbs
- .sample
- .locked
- .locky
- .opax
- .opal
- .chm
- .crt
It encrypts files found in the following folders:
- C:\Users\{Username}\Desktop
- C:\Users\{Username}\Links
- C:\Users\{Username}\Contacts
- C:\Users\{Username}\Desktop
- C:\Users\{Username}\Documents
- C:\Users\{Username}\Downloads
- C:\Users\{Username}\Pictures
- C:\Users\{Username}\Music
- C:\Users\{Username}\OneDrive
- C:\Users\{Username}\Saved Games
- C:\Users\{Username}\Favorites
- C:\Users\{Username}\Searches
- C:\Users\{Username}\Videos
- D:\{All folders in Drive D:}
It appends the following extension to the file name of the encrypted files:
- .CRYPTR
It drops the following file(s) as ransom note:
- C:\Users\{Username}\Desktop\ATTANTION!!!.txt
- C:\Users\{Username}\Desktop\INTRUCTION.html
- C:\Users\{Username}\Desktop\PAYMENT !!!.txt
SOLUTION
9.850
14.554.01
09 Oct 2018
14.555.00
10 Oct 2018
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 these folders
- C:\{Username}\run11
Step 4
Search and delete this file
- C:\Users\{Username}\Desktop\ATTANTION!!!.txt
- C:\Users\{Username}\Desktop\INTRUCTION.html
- C:\Users\{Username}\Desktop\PAYMENT !!!.txt
- C:\{Username}\CRYPTR.jpg
Step 5
Scan your computer with your Trend Micro product to delete files detected as RANSOM.WIN32.FLYTERPER.THIOGAH. 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
Reset your Desktop properties
Step 7
Restore encrypted files from backup.
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