RANSOM_INFINITETEAR.THAOIH

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.

It is capable of encrypting files in the affected system.

It drops files as ransom note.

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 copies of itself into the affected system:

• %Application Data%\Support\msvsupport.exe

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

Autostart Technique

This Ransomware adds the following registry entries to enable its automatic execution at every system startup:

HKEY_CURRENT_USER\SOFTWARE\Microsoft\
Windows\CurrentVersion\Run
msvsupport = %Application Data%\Support\msvsupport.exe

Other System Modifications

This Ransomware adds the following registry entries as part of its installation routine:

HKEY_CURRENT_USER\SOFTWARE\InfiniteTear
Trust = 00XFF

Process Termination

This Ransomware terminates the following processes if found running in the affected system's memory:

• msftesql
• sqlagent
• sqlbrowser
• sqlserver
• sqlwriter.exe
• oracle.exe
• ocssd
• dbsnmp
• synctime
• mydesktopqos
• agntsvc
• isqlplusvc
• firefoxconfig
• tbirdconfig
• occom
• mysqld
• mysqkd-nt
• mysqld-opt
• dbeng50
• sqbcoreservice

Other Details

This Ransomware encrypts files with the following extensions:

• .qcow2
• .rvt
• .st7
• .stm
• .vbox
• .vdi
• .vhd
• .vhdx
• .vmdk
• .vmsd
• .psafe3
• .vmx
• .vmxf
• .3fr
• .3pr
• .ab4
• .accde
• .accdr
• .accdt
• .ach
• .acr
• .sd0
• .sxw
• .adb
• .advertisements
• .agdl
• .ait
• .apj
• .asm
• .awg
• .back
• .backup
• .sti
• .oil
• .backupdb
• .bay
• .bdb
• .bgt
• .bik
• .bpw
• .cdr3
• .cdr4
• .cdr5
• .cdr6
• .ycbcra
• .cdrw
• .ce1
• .ce2
• .cib
• .craw
• .crw
• .csh
• .csl
• .db_journal
• .dc2
• .pptm
• .dcs
• .ddoc
• .ddrw
• .der
• .des
• .dgc
• .djvu
• .dng
• .drf
• .dxg
• .eml
• .ppt
• .erbsql
• .erf
• .exf
• .ffd
• .fh
• .fhd
• .gray
• .grey
• .gry
• .hbk
• .ibd
• .7z
• .ibz
• .iiq
• .incpas
• .jpe
• .kc2
• .kdbx
• .kdc
• .kpdx
• .lua
• .mdc
• .mef
• .config
• .mfw
• .mmw
• .mny
• .mrw
• .myd
• .ndd
• .nef
• .nk2
• .nop
• .nrw
• .ns2
• .ns3
• .ldf
• .ns4
• .nwb
• .nx2
• .nxl
• .nyf
• .odb
• .odf
• .odg
• .odm
• .orf
• .otg
• .oth
• .py
• .ots
• .ott
• .p12
• .p7b
• .p7c
• .pdd
• .pem
• .plus_muhd
• .plc
• .pot
• .pptx
• .py
• .qba
• .qbr
• .qbw
• .qbx
• .qby
• .raf
• .rat
• .raw
• .rdb
• .rwl
• .rwz
• .conf
• .sda
• .sdf
• .sqlite
• .sqlite3
• .sqlitedb
• .sr2
• .srf
• .srw
• .st5
• .st8
• .std
• .stx
• .sxd
• .sxg
• .sxi
• .sxm
• .tex
• .wallet
• .wb2
• .wpd
• .x11
• .x3f
• .xis
• .ARC
• .contact
• .dbx
• .doc
• .docx
• .jnt
• .jpg
• .msg
• .oab
• .ods
• .pdf
• .pps
• .ppsm
• .prf
• .pst
• .rar
• .rtf
• .txt
• .wab
• .xls
• .xlsx
• .xml
• .zip
• .1cd
• .3ds
• .3g2
• .7zip
• .accdb
• .aoi
• .asf
• .asp
• .aspx
• .asx
• .avi
• .bak
• .cer
• .cfg
• .class
• .cs
• .css
• .csv
• .db
• .dds
• .dwg
• .dxf
• .flf
• .flv
• .html
• .idx
• .js
• .key
• .kwm
• .laccdb
• .lit
• .m3u
• .mbx
• .md
• .mdf
• .mid
• .mlb
• .mov
• .mp3
• .mp4
• .mpg
• .obj
• .odt
• .pages
• .php
• .psd
• .pwm
• .rm
• .safe
• .sav
• .save
• .sql
• .srt
• .swf
• .thm
• .vob
• .wav
• .wma
• .wmv
• .xlsb
• 3dm
• .aac
• .ai
• .arw
• .c
• .cdr
• .cls
• .cpi
• .cpp
• .cs
• .db3
• .docm
• .dot
• .dotm
• .dotx
• .drw
• .dxb
• .eps
• .fla
• .flac
• .fxg
• .java
• .m
• .m4v
• .max
• .mdb
• .pcd
• .pct
• .pl
• .potm
• .potx
• .ppam
• .ppsm
• .ppsx
• .pptm
• .ps
• .r3d
• .rw2
• .sldm
• .sldx
• .svg
• .tga
• .wps
• .xla
• .xlam
• .xlm
• .xlr
• .xlsm
• .xlt
• .xltm
• .xltx
• .xlw
• .act
• .adp
• .al
• .1
• .bkp
• .blend
• .cdf
• .cdx
• .cgm
• .cr2
• .crt
• .dac
• .dbf
• .dcr
• .ddd
• .design
• .dtd
• .fdb
• .fff
• .fpx
• .h
• .iif
• .indd
• .jpeg
• .mos
• .nd
• .nsd
• .nsf
• .nsg
• .nsh
• .odc
• .odp
• .pas
• .pat
• .pef
• .pfx
• .ptx
• .qbb
• .qbm
• .sas7bdat
• .say
• .st4
• .st6
• .stc
• .sxc
• .tlg
• .wad
• .xlk
• .aiff
• .bmp
• .cmt
• .dat
• .dit
• .edb
• .flvv
• .avhd
• .back
• .c
• .ctl
• .dbf
• .disk
• .dwg
• .gz
• .mail
• .nrg
• .ora
• .ova
• .ovf
• .pmf
• .ppt
• .pptx
• .pst
• .pvi
• .pyc
• .sln
• .tar
• .vbs
• .vcb
• .vfd
• .vmc
• .vsd
• .vsdx
• .vsv
• .work
• .xvd
• .123
• .3dm
• .602
• .aes
• .asc
• .brd
• .bz2
• .cmd
• .dch
• .dif
• .dip
• .docb
• .frm
• .gpg
• .jsp
• .lay
• .lay6
• .m4u
• .mml
• .myi
• onetoc2
• .PAQ
• .ps1
• .sch
• .slk
• .snt
• .suo
• .tgz
• .tif
• .tiff
• .uop
• .uot
• .vcd
• .wk1
• .wks
• .xlc
• .gif
• .apk
• .groups
• .hdd
• .hpp
• .log
• .m2ts
• .m4p
• .mkv
• .mpeg
• .epub
• .yuv
• .ndf
• .nvram
• .ogg
• .ost
• .pab
• .pdb
• .pif
• .png
• .qed
• .qcow
• .otp
• .s3db

It drops the following file(s)/component(s):

• %Application Data%\Microsoft\00000.ini - contains the log of the files that are encrypted

(Note: %Application Data% is the Application Data folder, where it usually is C:\Documents and Settings\{user name}\Application Data on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Roaming 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 is capable of encrypting files in the affected system.

It executes the following command to disable/stop/delete Windows components:

• cmd.exe /C vssadmin.exe delete shadows /all /Quiet
• cmd.exe /C WMIC.exe shadowcopy delete
• cmd.exe /C Bcdedit.exe /set {default} recoveryenabled no
• cmd.exe /C Bcdedit.exe /set {default} bootstatuspolicy ignoreallfailures

Ransomware Routine

This Ransomware avoids encrypting files with the following strings in their file path:

• Windows
• Program Files
• ProgramData
• PerfLogs
• $Recycle.Bin
• Microsoft
• Microsoft Help
• Microsoft App
• Certification Kit
• Windows Defender
• ESET
• COMODO
• Windows NT
• Windows Kits
• Windows Mail
• Windows Media Player
• Windows Multimedia Platform
• Windows Phone Kits
• Windows Phone
• Silverlight Kits
• Temp
• Windows Photo Viewer
• Windows Protable Devices
• Windows Slidebar
• WindowsPowerShell
• NVIDIA Corporation
• Microsoft.NET
• Internet Explorer
• Kaspersky Lab
• McAfee
• Avira
• spytech software
• sysconfig
• Avast
• Dr.Web
• Symantec
• Symantec_Client_Security
• system volume information
• AVG
• Microsoft Shared
• Common Files
• Outlook Express
• Movie Maker
• Chrome
• Mozilla Firefox
• Opera
• YandexBrowser
• ntldr
• Wsus
• !!AntiCrypto!!
• Public

It appends the following extension to the file name of the encrypted files:

• Infinite

It drops the following file(s) as ransom note:

• {Encrypted file path}\#How_Decrypt_Files.txt