RANSOM_HIDDENTEARSAD.A

February 07, 2018
 Analysis by: Noel Anthony Llimos
 PLATFORM:

Windows

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

  • Threat Type: Ransomware

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

Infection Channel:

Downloaded from the Internet

This ransomware appears to be a testing program.

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.

However, due to errors in its code, it fails to perform its intended routine.

It encrypts files found in specific folders.

  TECHNICAL DETAILS

File Size:

20992 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

29 Aug 2017

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 files:

  • %AppDataLocal%\GDIPFONTCACHEV1.DAT

(Note: %AppDataLocal% is the Application Data folder found in Local Settings, where it is usually C:\Documents and Settings\{user name}\Local Settings\Application Data on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local 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.)

Other Details

This Ransomware encrypts files with the following extensions:

  • .txt
  • .doc
  • .docx
  • .log
  • .msg
  • .odt
  • .pages
  • .rtf
  • .tex
  • .wpd
  • .wps
  • .csv
  • .dat
  • .ged
  • .key
  • .keychain
  • .pps
  • .ppt
  • .pptx
  • .sdf
  • .tar
  • .tax2014
  • .tax2015
  • .vcf
  • .xml
  • .aif
  • .iff
  • .m3u
  • .m4a
  • .mid
  • .mp3
  • .mpa
  • .wav
  • .wma
  • .3g2
  • .3gp
  • .asf
  • .avi
  • .flv
  • .m4v
  • .mov
  • .mp4
  • .mpg
  • .rm
  • .srt
  • .swf
  • .vob
  • .wmv
  • .3dm
  • .3ds
  • .max
  • .obj
  • .lay
  • .onetoc2
  • .dot
  • .bmp
  • .dds
  • .gif
  • .jpg
  • .png
  • .psd
  • .tga
  • .thm
  • .tif
  • .tiff
  • .yuv
  • .backup
  • .ott
  • .ai
  • .eps
  • .ps
  • .svg
  • .docb
  • .indd
  • .pct
  • .pdf
  • .sqlite3
  • .sqlitedb
  • .xlr
  • .xls
  • .xlsx
  • .pfx
  • .accdb
  • .db
  • .dbf
  • .mdb
  • .pdb
  • .sql
  • .dwg
  • .dxf
  • .asp
  • .aspx
  • .cer
  • .cfm
  • .csr
  • .css
  • .htm
  • .html
  • .js
  • .jsp
  • .php
  • .rss
  • .xhtml
  • .mml
  • .stc
  • .7z
  • .cbr
  • .deb
  • .gz
  • .pkg
  • .rpm
  • .sitx
  • .tar.gz
  • .zip
  • .zipx
  • .rar
  • .bin
  • .cue
  • .dmg
  • .iso
  • .mdf
  • .toast
  • .vcd
  • .c
  • .class
  • .cpp
  • .cs
  • .dtd
  • .fla
  • .h
  • .java
  • .lua
  • .m
  • .pl
  • .py
  • .sh
  • .sln
  • .swift
  • .vb
  • .vcxproj
  • .xcodeproj
  • .bak
  • .tmp
  • .rar
  • .crdownload
  • .ics
  • .msi
  • .part
  • .torrent
  • .dll
  • .sln

However, due to errors in its code, it fails to perform its intended routine.

Ransomware Routine

This Ransomware encrypts files found in the following folders:

  • %System Root%\Users

(Note: %System Root% is the Windows root folder, where it usually is C:\ on all Windows operating system versions.)

NOTES:

This ransomware appears to be a testing program.

  SOLUTION

Minimum Scan Engine:

9.850

FIRST VSAPI PATTERN FILE:

13.624.08

VSAPI OPR PATTERN File:

13.625.00

Step 1

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

Step 2

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.  
  • %AppDataLocal%\GDIPFONTCACHEV1.DAT

Step 3

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 4

Before doing any scans, Windows XP, Windows Vista, and Windows 7 users must disable System Restore to allow full scanning of their computers.

Step 5

Restore encrypted files from backup.


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