RANSOM_RUNELOCKER.A
Ransom.YeeScrLocker(Norton);MSIL/LockScreen.RC!tr(Fortinet);Ransom.YeeScrLocker(Symantec)
Windows
Threat Type: Trojan
Destructiveness: No
Encrypted: No
In the wild: Yes
OVERVIEW
Dropped by other malware, Downloaded from the Internet
This Trojan 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
2,870,784 bytes
EXE
No
25 Nov 2016
Displays message/message boxes, Locks screen, Deletes files
Arrival Details
This Trojan 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 Trojan adds the following registry entries to enable its automatic execution at every system startup:
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
PremierePro = {Malware File Path}
Process Termination
This Trojan terminates the following processes if found running in the affected system's memory:
- taskmgr.exe
Other Details
This Trojan does the following:
- It locks the screen and display the following ransom note:
- It deletes files in Desktop and subdirectories with the following file extensions:
- bat
- bmp
- doc
- docm
- docx
- gif
- html
- jpeg
- jpg
- mp3
- mp4
- png
- ppt
- pptm
- pptx
- psd
- rar
- rtf
- txt
- vbs
- wav
- xls
- xlsm
- xlsx
- zip
SOLUTION
9.850
12.920.03
25 Nov 2016
12.921.00
26 Nov 2016
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\Windows\CurrentVersion\Run
- PremierePro = {Malware File Path}
- PremierePro = {Malware File Path}
Step 5
Restart in normal mode and scan your computer with your Trend Micro product for files detected as RANSOM_RUNELOCKER.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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