RANSOM_BRAINCRYPT.A
Ransom.BadEncript (Malwarebytes); Trojan.Win32.DiskWriter.qx (Kaspersky);
Windows
Threat Type: Trojan
Destructiveness: No
Encrypted: Yes
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
4,590,080 bytes
EXE
No
27 Dec 2016
Encrypts files, Drops 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.
Installation
This Trojan drops the following files:
- {Malware Path}\!!! HOW TO DECRYPT FILES !!!.txt - ransom note
Other System Modifications
This Trojan modifies the following file(s):
- It encrypts files and appends the extension .braincrypt
NOTES:
Below is the content of the ransom note !!! HOW TO DECRYPT FILES !!!.txt:
SOLUTION
9.800
13.120.02
27 Dec 2016
13.121.00
27 Dec 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
Search and delete this file
- {Malware Path}\!!! HOW TO DECRYPT FILES !!!.txt
Step 4
Scan your computer with your Trend Micro product to delete files detected as RANSOM_BRAINCRYPT.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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