Analysis by: Francis Xavier Antazo
ALIASES:

Joke:Win32/Rain (Microsoft); Joke Program (Symantec); Joke.EG (AVG); Win32:Joke-B [PUP] (Avast); Joke-Splash (McAfee);

 PLATFORM:

Windows

 OVERALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:
 INFORMATION EXPOSURE:

  • Threat Type: Joke Program

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

Infection Channel: Downloaded from the Internet, Dropped by other malware

This joke program 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

File Size: 163927 bytes
File Type: EXE
Memory Resident: Yes
Initial Samples Received Date: 08 Dec 2010
Payload: Displays windows

Arrival Details

This joke program arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

NOTES:

It displays a transparent window that displays a visual effect of 'melting' the current desktop display.

Below is a screenshot of the visual effect.

  SOLUTION

Minimum Scan Engine: 9.800
FIRST VSAPI PATTERN FILE: 1.758.50
FIRST VSAPI PATTERN DATE: 17 Aug 2016

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

Scan your computer with your Trend Micro product to delete files detected as JOKE_MELT. 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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