Ransom:MSIL/Ryzerlo.A (Microsoft)
Windows
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.
It gathers certain information on the affected computer.
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.
Installation
This Trojan drops the following copies of itself into the affected system and executes them:
(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.)
It drops the following files:
Download Routine
This Trojan connects to the following URL(s) to download its component file(s):
It saves the files it downloads using the following names:
Information Theft
This Trojan gathers the following information on the affected computer:
NOTES:
It connects to the following website to send information:
It encrypts files with the following extensions in the %User Profile% sub folders and appends .locked as the new file extension of the encrypted files:
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
Search and delete these files
Step 3
Scan your computer with your Trend Micro product to delete files detected as RANSOM_CRYPTEAR.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.