RANSOM_ZONE.A
Trojan-FNYX!59EEDB516DD0 (NAI); Backdoor.Win32.Remcos.d (KASPERSKY); Trojan.GenericKD.12401102 (BITDEFENDER)
Windows
Threat Type: Ransomware
Destructiveness: No
Encrypted: No
In the wild: Yes
OVERVIEW
Dropped by other malware
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 terminates itself if it detects it is being run in a virtual environment.
TECHNICAL DETAILS
2,202,112 bytes
EXE
Yes
23 Sep 2017
Displays message/message boxes
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 and executes the following files:
- %User Temp%\voEXEWzU7pvCMMvJQ7Qb.exe -> detected as Ransom_ZONE.B
It terminates itself if it finds the following processes in the affected system's memory:
- procexp64.exe
- procmon64.exe
- procmon.exe
- ollydbg.exe
- procexp.exe
- windbg.exe
- avp.exe
- avgcrsva.exe
- bdagent.exe
- avgrsa.exe
- bdwtxag.exe
- dwengine.exe
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
Driver86 = "{Full Path of Malware}\{Malware Name}.exe"
Other Details
This Ransomware displays the following message boxes:
It terminates itself if it detects it is being run in a virtual environment.
It does the following:
- Terminates itself if the malware path contains either of the following strings:
- testapp
- malware
- sandbox
- mwsmpl
- sample
- virus
- self.
SOLUTION
9.850
13.680.08
25 Sep 2017
13.681.00
26 Sep 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_ZONE.A
- 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\Microsoft\Windows\CurrentVersion\Run
- Driver86 = "{Full Path of Malware}\{Malware Name}.exe"
- Driver86 = "{Full Path of Malware}\{Malware Name}.exe"
Step 5
Search and delete this file
- %User Temp%\voEXEWzU7pvCMMvJQ7Qb.exe
Step 6
Scan your computer with your Trend Micro product to delete files detected as RANSOM_ZONE.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 the following Trend Micro Support pages for more information:
Step 7
Restore encrypted files from backup.
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