RANSOM_HOLA.D

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 is capable of encrypting files in the affected system.

It drops files as ransom note.

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:

• %User Temp%\{Malware Name}.exe

(Note: %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.)

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
{10 Random Numbers} = %User Temp%\{Malware Name}.exe

Other System Modifications

This Ransomware adds the following registry entries:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Run
{Random Numbers} = {Random Numbers}

Other Details

This Ransomware is capable of encrypting files in the affected system.

Ransomware Routine

This Ransomware renames encrypted files using the following names:

• email-hola@all-ranso{BLOCKED}fo.ver-CL 1.4.1.0.id-{ID number}-{Month in number}@{Day}@{Year} {Hour}@{Minute}@{Second} {AM/PM}{7 Random number}.fname-{File name}.{File Extension}.fairytail

It drops the following file(s) as ransom note:

• {Encrypted Folder}\README.txt