RANSOM_BITPAYMER.TGACAI
Trojan-Ransom.Win32.CryFile.zzl (Kaspersky), Trojan:Win32/Occamy.B (Microsoft)
Windows
Threat Type: Ransomware
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
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.
It modifies the Internet Explorer Zone Settings.
It drops files as ransom note.
TECHNICAL DETAILS
161,280 bytes
EXE
No
28 Oct 2018
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 files:
- %Temp%\SSession
(Note: %Temp% is the Windows temporary folder, where it usually is C:\Windows\Temp on all Windows operating system versions.)
It adds the following processes:
- "C:\Windows\System32\notepad.exe" C:\How_to_decrypt_files.txt
Web Browser Home Page and Search Page Modification
This Ransomware modifies the Internet Explorer Zone Settings.
Other Details
This Ransomware connects to the following possibly malicious URL:
- {BLOCKED}.{BLOCKED}.175.225
Ransomware Routine
This Ransomware renames encrypted files using the following names:
- [{BLOCKED}k@{BLOCKED}ail.com]{Filename}.sicck
It drops the following file(s) as ransom note:
- {Drive Letter}:/How_to_decrypt_files.txt
SOLUTION
9.850
14.592.04
28 Oct 2018
14.593.00
29 Oct 2018
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
*Note: The file name input box title varies depending on the Windows version (e.g. Search for files or folders named or All or part of the file name.).
• For Windows Vista, Windows 7, Windows Server 2008, Windows 8, Windows 8.1, and Windows Server 2012:
- Open a Windows Explorer window.
- For Windows Vista, 7, and Server 2008 users, click Start>Computer.
- For Windows 8, 8.1, and Server 2012 users, right-click on the lower left corner of the screen, then click File Explorer.
- In the Search Computer/This PC input box, type:
DATA_GENERIC - Once located, select the file then press SHIFT+DELETE to delete it.
*Note: Read the following Microsoft page if these steps do not work on Windows 7.
Step 4
Reset the Internet Explorer Home and Search pages
Step 5
Scan your computer with your Trend Micro product to delete files detected as RANSOM_BITPAYMER.TGACAI. 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 the following Trend Micro Support pages for more information:
Step 6
Restore encrypted files from backup.
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