RANSOM_KRYPTA.A
Windows
![](/vinfo/imgFiles/legend.jpg)
Threat Type: Ransomware
Destructiveness: No
Encrypted: No
In the wild: Yes
OVERVIEW
Dropped by other malware, 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.
TECHNICAL DETAILS
14,848 bytes
EXE
No
23 Mar 2017
Displays windows, 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 drops the following copies of itself into the affected system:
- %Start Menu%\Programs\Startup\win32.exe
(Note: %Start Menu% is the Start Menu folder, where it usually is C:\Documents and Settings\{user name}\Start Menu on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Roaming\Microsoft\Windows\Start Menu 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.)
Other Details
This Ransomware renames encrypted files using the following names:
- {original filename and extension}.enc
It does the following:
- This ransomware only encrypts files in the following folders:
- %User Profile%\Documents
- %User Profile%\Downloads
- %User Profile%\Pictures
- %User Profile%\Videos
- %User Profile%\Desktop
- %User Profile%\Music
- {drive letter}:
- It avoids encrypting files in the following path:
- C:\
- Once the "Entschlüsseln" button is clicked it will decrypt files under the %User Profile%\Music folder.
(Note: %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.)
NOTES:
This ransomware displays the following window after execution:
SOLUTION
9.850
13.296.02
24 Mar 2017
13.297.00
25 Mar 2017
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
Restart in Safe Mode
Step 4
Restart in normal mode and scan your computer with your Trend Micro product for files detected as RANSOM_KRYPTA.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
Restore encrypted files from backup.
Did this description help? Tell us how we did.