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CRCK_KEYGEN.GC

May 30, 2018
 Analysis by: Johnlery Triunfante
 ALIASES:

Win32/Keygen.PZ potentially unsafe (NOD32); Trojan:Win32/Tiggre!rfn (Microsoft)

 PLATFORM:

Windows

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

  • Threat Type: Cracking Application

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW

Infection Channel:

Downloaded from the Internet, Dropped by other malware


This Cracking Application arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites. It may be manually installed by a user.

It generates serial numbers to crack into programs that need valid serial numbers for the programs to function fully.

It uses a user interface (UI).

  TECHNICAL DETAILS

File Size:

70,144 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

30 May 2011

Payload:

Displays windows

Arrival Details

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

It may be manually installed by a user.

Installation

This Cracking Application drops the following files:

  • %User Temp%\Test.dat
  • %User Temp%\{random strings}.DLL → Deleted after the executable closes

(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.)

It adds the following mutexes to ensure that only one of its copies runs at any one time:

  • CORE - Corel PDF Fusion v1.0

Cracker Routine

This Cracking Application generates serial numbers to crack into programs that need valid serial numbers for the programs to function fully.

Other Details

This Cracking Application uses the following user interfaces (UIs):

  SOLUTION

Minimum Scan Engine:

9.850

SSAPI PATTERN File:

1.953.00

SSAPI PATTERN Date:

31 May 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

Search and delete this file

[ Learn More ]
There may be some files that are hidden. Please make sure you check the Search Hidden Files and Folders checkbox in the "More advanced options" option to include all hidden files and folders in the search result.  
  • %User Temp%\Test.dat
  • %User Temp%\{random strings}.DLL

Step 4

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