RANSOM_GANDCRAB.TIAOBFX
Windows
Threat Type: Ransomware
Destructiveness: No
Encrypted:
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.
TECHNICAL DETAILS
315,400 bytes
EXE
Yes
11 Mar 2018
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.
Installation
This Ransomware drops the following copies of itself into the affected system:
- %Application Data%\Microsoft\{6 Random Characters}.exe
(Note: %Application Data% is the Application Data folder, where it usually is C:\Documents and Settings\{user name}\Application Data on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Roaming 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.)
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\RunOnce
{11 Random Characters} = %Application Data%\Microsoft\{6 Random Characters}.exe
Other Details
This Ransomware connects to the following URL(s) to get the affected system's IP address:
- http://{BLOCKED}t.{BLOCKED}myipaddress.com/
It connects to the following possibly malicious URL:
- http://{BLOCKED}.{BLOCKED}.191.76/iescees?loeigh={value}
- http://{BLOCKED}.{BLOCKED}.191.76/owpleypl?b={value}&bore={value}
- {BLOCKED}aromana.{BLOCKED}
- {BLOCKED}ehunterteam.{BLOCKED}
- {BLOCKED}.{BLOCKED}
SOLUTION
9.850
14.124.02
12 Mar 2018
14.125.00
13 Mar 2018
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_GANDCRAB.TIAOBFX
- 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\RunOnce
- {11 Random Characters} = %Application Data%\Microsoft\{6 Random Characters}.exe
- {11 Random Characters} = %Application Data%\Microsoft\{6 Random Characters}.exe
Step 5
Search and delete these files
- %Application Data%\Microsoft\{6 Random Characters}.exe
Step 6
Scan your computer with your Trend Micro product to delete files detected as RANSOM_GANDCRAB.TIAOBFX. 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:
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