RANSOM_CCORDLOCK.A
Trojan.Win32.Diztakun.bckd (Kaspersky); Ransom.HiddenTear (Symantec);
Windows
Threat Type: Ransomware
Destructiveness: No
Encrypted: No
In the wild: Yes
OVERVIEW
Dropped by other malware, Downloaded from the Internet
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 adds certain registry entries to disable the Task Manager. This action prevents users from terminating the malware process, which can usually be done via the Task Manager.
TECHNICAL DETAILS
186,368 bytes
EXE
No
12 Oct 2017
Terminates processes, Connects to URLs/IPs
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.
Autostart Technique
This Ransomware adds the following registry entries to enable its automatic execution at every system startup:
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
CSL = "{Malware Path}\{Malware Filename}"
Other System Modifications
This Ransomware adds the following registry entries to disable the Task Manager:
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Policies\
System
DisableTaskMgr = "1"
Process Termination
This Ransomware terminates the following processes if found running in the affected system's memory:
- explorer.exe
Other Details
This Ransomware displays a pop-up window with the following message:
It does the following:
- It displays the following window if the inputted key is incorrect:
- It does the following if the inputted key is correct:
- It deletes the registry keys it created
- It adds the following processes:
- explorer.exe
NOTES:
This Ransomware connects to the following URL to verify the key:
https://jokebeatzz.l{BLOCKED}ty.de/kws.txt
As of this writing, the current key is "cracked:cracked"
SOLUTION
9.850
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
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
- CSL = "{Malware Path}\{Malware Filename}"
- CSL = "{Malware Path}\{Malware Filename}"
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\System
- DisableTaskMgr = "1"
- DisableTaskMgr = "1"
Step 5
Restart in normal mode and scan your computer with your Trend Micro product for files detected as RANSOM_CCORDLOCK.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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