- Threat Encyclopedia
- Malware
- RANSOM_SURPRISE.A
Windows
Dropped by other malware, Downloaded from the Internet
This malware 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.
147,456 bytes
EXE
Yes
23 Mar 2016
Encrypts files, Steals information
Arrival Details
This malware 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 malware drops the following component file(s):
(Note: %Desktop% is the desktop folder, where it usually is C:\Documents and Settings\{user name}\Desktop in Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\Desktop in Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.)
It leaves text files that serve as ransom notes containing the following:
Other System Modifications
This malware modifies the following file(s):
Information Theft
This malware gathers the following information on the affected computer:
Stolen Information
This malware sends the gathered information via HTTP POST to the following URL:
Other Details
This malware encrypts files with the following extensions:
It does the following:
NOTES:
This ransomware is seen to be delivered via the remote desktop control app TeamViewer.
9.800
12.420.04
23 Mar 2016
12.421.00
24 Mar 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
Search and delete these files
Step 5
Restart in normal mode and scan your computer with your Trend Micro product for files detected as RANSOM_SURPRISE.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.
Step 6
Restore encrypted files from backup.
Step 7
Scan your computer with your Trend Micro product to delete files detected as RANSOM_SURPRISE.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.