RANSOM_JANLOCKER.A
Ransom.Winlock (MalwareBytes); MSIL/LockScreen.SO!tr (Fortinet); a variant of MSIL/LockScreen.SO (ESET-NOD32)
Windows
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
41,472 bytes
No
02 Apr 2017
Locks screen, Displays graphics/image
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\
CurrentVersion\Run
DeutschlandRansomware = {malware path}\{malware filename}.exe
NOTES:
This ransomware does not encrypt any file on the infected computer. It displays the following lockscreen:
If the button Wo bekomme ich das Passwort is pressed, it displays the following message:
If the user enters a wrong password, it displays the following message:
The password to unlock the screen and exit the program is 1234.
SOLUTION
9.850
13.336.02
12 Apr 2017
13.337.00
13 Apr 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
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\CurrentVersion\Run
- DeutschlandRansomware = {malware path}\{malware filename}.exe
- DeutschlandRansomware = {malware path}\{malware filename}.exe
Step 5
Restart in normal mode and scan your computer with your Trend Micro product for files detected as RANSOM_JANLOCKER.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.
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