HKTL_CREDRIX.A

September 11, 2017
 Analysis by: Rheniel Rhay Ramos
 ALIASES:

HackTool.Win64.Agent.cp (Kaspersky); HackTool:Win64/Mimikatz.A (Microsoft); Hacktool.Credrix (Symantec)

 PLATFORM:

Windows

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

  • Threat Type: Hacking Tool

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

Infection Channel:

Downloaded from the Internet, Dropped by other malware

This Hacking Tool 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:

889,856 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

05 Apr 2017

Payload:

Steals information

Arrival Details

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

Stolen Information

The stolen information is saved in the following file:

  • C:\Users\Public\Log.txt

Other Details

This Hacking Tool does the following:

  • It lists down the computer name and operating system of the machine into the txt file.
  • It logs the starting time the malware was run and the finishing time after it steals informations.
  • It steals various information including usernames, passwords, and history on all users from the following applications:
    • Mozilla Firefox
    • Mozilla Thunderbird
    • Opera
    • Google Chrome
    • Internet Explorer
    • FileZilla
    • RDP
    • UltraVNC
    • Microsoft Outlook

  SOLUTION

Minimum Scan Engine:

9.850

FIRST VSAPI PATTERN FILE:

1.872.10

FIRST VSAPI PATTERN DATE:

07 Sep 2017

VSAPI OPR PATTERN File:

1.873.00

VSAPI OPR PATTERN Date:

08 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

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.  
  • C:\Users\Public\Log.txt

Step 4

Scan your computer with your Trend Micro product to delete files detected as HKTL_CREDRIX.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 this Knowledge Base page for more information.


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