RANSOM_HIDDENTEARTRANSOM.C
HEUR:Trojan.Win32.Generic (Kaspersky), Ransom:MSIL/Ryzerlo.A (Microsoft), Gen:Variant.MSILPerseus.64730 (BitDefender)
Windows
![](/vinfo/imgFiles/legend.jpg)
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
128,512 bytes
EXE
No
05 Jan 2017
Encrypts 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 adds the following processes:
- {Malware Path}\WebMatrixWeb.exe
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
WindowsServiceEngine = "{Malware path and file name}.exe"
Dropping Routine
This Trojan drops the following files:
- %Desktop%\DOSYALARINIZA ULAŞMAK İÇİN AÇINIZ.html - ransom note
(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.)
Other Details
This Trojan encrypts files with the following extensions:
- .txt
- .rar
- .jpg
- .sql
- .png
- .accdb
- .xls
- .xlsx
- .doc
- .docx
- .ppt
- .pptx
- .zip
- .gz
- .tar
- .tib
- .tmp
- .frm
- .dwg
- .pst
- .psd
- .ai
- .svg
- .gif
- .bak
- .db
It renames encrypted files using the following names:
- {Original file name and extension}.locked
NOTES:
The ransomware encrypts files in the following location:
The ransomware displays the following ransom note:
SOLUTION
9.850
13.138.02
05 Jan 2017
13.139.00
06 Jan 2017
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
Terminate a malware/grayware process
*Note: If the detected process is not displayed in theWindows Task Manager, continue doing the next steps.
- WebMatrixWeb.exe
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
- WindowsServiceEngine = "{Malware path and file name}.exe"
- WindowsServiceEngine = "{Malware path and file name}.exe"
Step 5
Search and delete this file
- %Desktop%\DOSYALARINIZA ULAŞMAK İÇİN AÇINIZ.html - ransom note
Step 6
Restore encrypted files from backup.
Step 7
Scan your computer with your Trend Micro product to delete files detected as RANSOM_HIDDENTEARTRANSOM.C. 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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