RANSOM_RANSED.B
Windows
Threat Type: Ransomware
Destructiveness: No
Encrypted:
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 encrypts files found in specific folders.
TECHNICAL DETAILS
214,528 bytes
Yes
17 Jul 2017
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.
Autostart Technique
This Ransomware adds the following registry entries to enable its automatic execution at every system startup:
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
RANSED = {malware path and filename}
Other System Modifications
This Ransomware adds the following registry entries:
HKEY_CURRENT_USER\RANSED
key = {random key}
Other Details
This Ransomware does the following:
- Sends key to MySQL Server {BLOCKED}d.ddns.net
Ransomware Routine
This Ransomware encrypts files with the following extensions:
- .txt
- .doc
- .docx
- .xls
- .xlsx
- .ppt
- .pptx
- .odt
- .jpg
- .png
- .csv
- .sql
- .mdb
- .sln
- .php
- .asp
- .aspx
- .html
- .xml
- .psd
- .mp4
- .mp3
- .ogg
- .avi
- .wmv
- .wav
- .wave
- .gif
- .mus
- .db
- .cs
- .c
- .h
- .cpp
- .jar
- .bmp
- .jpeg
- .rar
- .zip
- .7z
- .7zip
- .css
It encrypts files found in the following folders:
- %Temp%
- %Desktop%
- %Application Data%
- %User Profile%\My Music
- %User Profile%\My Videos
- %User Profile%\My Pictures
- %User Profile%\My Documents
- F:\
(Note: %Temp% is the Windows temporary folder, where it usually is C:\Windows\Temp on all Windows operating system versions.. %Desktop% is the desktop folder, where it usually is C:\Documents and Settings\{user name}\Desktop in Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\Desktop in Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.. %Application Data% is the Application Data folder, where it usually is C:\Documents and Settings\{user name}\Application Data on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Roaming on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.. %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003, or C:\Users\{user name} on Windows Vista and 7.)
It appends the following extension to the file name of the encrypted files:
- .ransed
NOTES:
This ransomware displays the following windows:
It displays the following message if it fails to connect to MySQL server:
After 7 days, it displays the following message then deletes the encrypted files:
SOLUTION
9.850
13.538.07
17 Jul 2017
13.539.00
18 Jul 2017
Step 1
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 2
Before doing any scans, Windows XP, Windows Vista, and Windows 7 users must disable System Restore to allow full scanning of their computers.
Step 3
Restart in Safe Mode
Step 4
Delete this registry key
Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.
HKEY_CURRENT_USERRANSED
Step 5
Delete this registry value
Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
- RANSED
- RANSED
Step 6
Restart in normal mode and scan your computer with your Trend Micro product for files detected as RANSOM_RANSED.B. 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 7
Restore encrypted files from backup.
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