RANSOM_CRYPICH.EU
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 deletes itself after execution. It is capable of encrypting files in the affected system.
It drops files as ransom note.
TECHNICAL DETAILS
2,748,416 bytes
EXE
No
18 Jul 2017
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 creates the following folders:
- %User Profile%\Application Data\TEMP
(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.)
Other System Modifications
This Ransomware adds the following registry keys:
HKEY_CURRENT_USER\Software\Licenses
It adds the following registry entries:
HKEY_CURRENT_USER\Software\Licenses
{random characters} = {hex values}
Dropping Routine
This Ransomware drops the following files:
- %User Profile%\TEMP\RAIDTest
- %User Temp%\{hex numbers}.TMP
(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.. %User Temp% is the user's temporary folder, where it usually is C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local\Temp on 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 Ransomware deletes itself after execution.
It is capable of encrypting files in the affected system.
Ransomware Routine
This Ransomware renames encrypted files using the following names:
- {folder of encrypted files}\email-drakoshka@{BLOCKED}o.com.ver-CL 1.3.1.0.id-{user-defined string}@@@@@{hex string}-{hex string}.randomname-{30 random letters}.{3 random letters}
It drops the following file(s) as ransom note:
- {folder of encrypted files}\README.txt
SOLUTION
9.850
13.552.03
24 Jul 2017
13.553.00
25 Jul 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
Identify and terminate files detected as RANSOM_CRYPICH.EU
- Windows Task Manager may not display all running processes. In this case, please use a third-party process viewer, preferably Process Explorer, to terminate the malware/grayware/spyware file. You may download the said tool here.
- If the detected file is displayed in either Windows Task Manager or Process Explorer but you cannot delete it, restart your computer in safe mode. To do this, refer to this link for the complete steps.
- If the detected file is not displayed in either Windows Task Manager or Process Explorer, continue doing the next steps.
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\Licenses
- {random characters} = {hex values}
- {random characters} = {hex values}
Step 5
Delete this registry key
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
- Licenses
- Licenses
Step 6
Search and delete this file
- %User Profile%\TEMP\RAIDTest
- %User Temp%\{hex numbers}.TMP
- {folder of encrypted files}\README.txt
Step 7
Search and delete this folder
- %User Profile%\Application Data\TEMP
Step 8
Scan your computer with your Trend Micro product to delete files detected as RANSOM_CRYPICH.EU. 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 9
Restore encrypted files from backup.
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