Ransom.Win32.NEMTY.WLDG
Trojan-Ransom.Nemty (Ikarus) ;
Windows
Threat Type: Ransomware
Destructiveness: No
Encrypted: No
In the wild: Yes
OVERVIEW
Downloaded from the Internet
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 drops files as ransom note. It avoids encrypting files with the following file extensions.
TECHNICAL DETAILS
20,272 bytes
EXE
No
14 Jun 2020
Displays message/message boxes, Encrypts 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 adds the following mutexes to ensure that only one of its copies runs at any one time:
- na mne prigaet zhopa, pamc, pamc, pamc, pamc, pamc, ya vse
Other Details
This Ransomware does the following:
- After the encryption, it changes the desktop background to %User Temp%\GOOBA.jpg
(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Local\Temp on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)
Ransomware Routine
This Ransomware avoids encrypting files with the following strings in their file name:
- TELEGRAM-RECOVER.txt
It avoids encrypting files found in the following folders:
- Windows
- $Recycle bin
- RSA
- Ntuser.dat
- Programdata
- Appdata
- Program Files
- Program Files (x86)
It appends the following extension to the file name of the encrypted files:
- .TELEGRAM
It drops the following file(s) as ransom note:
- {Encrypted folder}\TELEGRAM-RECOVER.txt
- %User Temp%\GOOBA.jpg
It avoids encrypting files with the following file extensions:
- .exe
- .log
- .cab
- .cmd
- .com
- .cpl
- .ini
- .dll
- .url
- .ttf
- .mp3
- .pif
- .mp4
- .TELEGRAM
- .msi
SOLUTION
9.850
15.932.02
15 Jun 2020
15.933.00
16 Jun 2020
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.XXPE50FFF036
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
- {Encrypted folder}\TELEGRAM-RECOVER.txt
- %User Temp%\GOOBA.jpg
Step 5
Scan your computer with your Trend Micro product to delete files detected as Ransom.Win32.NEMTY.WLDG. 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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