Analysis by: John Anthony Banes
 PLATFORM:

Windows

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

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

This Trojan 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: 56,841 bytes
File Type: PS1
Memory Resident: No
Initial Samples Received Date: 27 Jun 2019
Payload: Injects files

Arrival Details

This Trojan 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 Trojan drops the following files:

  • \{BLOCKED}\{Computer Name} {True | False}.log - contains the following information:
    • Date and time of execution
    • Log entry of .FreezedByWizard.log
    • Error Messages (if any)
    • Computer Name
    • If successful on encryption or not (specified as True/False in the filename)

It injects codes into the following process(es):

Other System Modifications

This Trojan deletes the following files:

  • Existing %ProgramData%\.FreezedByWizard.log file

(Note: %ProgramData% is a version of the Program Files folder where any user on a multi-user computer can make changes to programs. This contains application data for all users. This is usually C:\ProgramData on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit), or C:\Documents and Settings\All Users on Windows Server 2003(32-bit), 2000(32-bit) and XP.)

  SOLUTION

Minimum Scan Engine: 9.850
FIRST VSAPI PATTERN FILE: 15.200.02
FIRST VSAPI PATTERN DATE: 27 Jun 2019
VSAPI OPR PATTERN File: 15.201.00
VSAPI OPR PATTERN Date: 28 Jun 2019

Step 1

Before doing any scans, Windows 7, Windows 8, Windows 8.1, and Windows 10 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

Remove the malware/grayware file dropped/downloaded by Trojan.PS1.FREEZING.A. (Note: Please skip this step if the threat(s) listed below have already been removed.)

    • Ransom.MSIL.FREEZING.A

Step 4

Scan your computer with your Trend Micro product to delete files detected as Trojan.PS1.FREEZING.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 the following Trend Micro Support pages for more information:


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