RANSOM_INFINITETEAR.A


 ALIASES:

Ransom:Win32/Genasom(Microsoft)

 PLATFORM:

Windows

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

  • Threat Type: Ransomware

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

Infection Channel:

Dropped by other malware, Downloaded from the Internet

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 encrypts files with specific file extensions. It encrypts files found in specific folders. It drops files as ransom note.

  TECHNICAL DETAILS

File Size:

46,592 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

15 Aug 2017

Payload:

Connects to URLs/IPs, Displays message/message boxes, Encrypts files

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.

Other System Modifications

This Ransomware adds the following registry entries:

HKEY_CURRENT_USER\Software\Infinite Tear
Install = Yes

Other Details

This Ransomware does the following:

  • Send info via telegram https://api.telegram.org/bot{BotToken}/sendMessage?chat_id={ChatId}+&text={data}
    data = Location,Machine information
  • If registry entry payload(from the added registry entries) already exist, malware will terminate.

Ransomware Routine

This Ransomware encrypts files with the following extensions:

  • .gif
  • .groups
  • .hdd
  • .hpp
  • .log
  • .m2ts
  • .m4p
  • .mkv
  • .mpeg
  • .ndf
  • .nvram
  • .ogg
  • .ost
  • .pab
  • .pdb
  • .pif
  • .png
  • .qed
  • .qcow
  • .qcow2
  • .rvt
  • .st7
  • .stm
  • .vbox
  • .vdi
  • .vhd
  • .vhdx
  • .vmdk
  • .vmsd
  • .vmx
  • .vmxf
  • .3fr
  • .3pr
  • .ab4
  • .accde
  • .accdr
  • .accdt
  • .ach
  • .acr
  • .adb
  • .advertisements
  • .agdl
  • .ait
  • .apj
  • .asm
  • .awg
  • .back
  • .backup
  • .backupdb
  • .bay
  • .bdb
  • .bgt
  • .bik
  • .bpw
  • .cdr3
  • .cdr4
  • .cdr5
  • .cdr6
  • .cdrw
  • .ce1
  • .ce2
  • .cib
  • .craw
  • .crw
  • .csh
  • .csl
  • .db_journal
  • .dc2
  • .dcs
  • .ddoc
  • .ddrw
  • .der
  • .des
  • .dgc
  • .djvu
  • .dng
  • .drf
  • .dxg
  • .eml
  • .erbsql
  • .erf
  • .exf
  • .ffd
  • .fh
  • .fhd
  • .gray
  • .grey
  • .gry
  • .hbk
  • .ibd
  • .ibz
  • .iiq
  • .incpas
  • .jpe
  • .kc2
  • .kdbx
  • .kdc
  • .kpdx
  • .lua
  • .mdc
  • .mef
  • .mfw
  • .mmw
  • .mny
  • .mrw
  • .myd
  • .ndd
  • .nef
  • .nk2
  • .nop
  • .nrw
  • .ns2
  • .ns3
  • .ns4
  • .nwb
  • .nx2
  • .nxl
  • .nyf
  • .odb
  • .odf
  • .odg
  • .odm
  • .orf
  • .otg
  • .oth
  • .otp
  • .ots
  • .ott
  • .p12
  • .p7b
  • .p7c
  • .pdd
  • .pem
  • .plus_muhd
  • .plc
  • .pot
  • .pptx
  • .psafe3
  • .py
  • .qba
  • .qbr
  • .qbw
  • .qbx
  • .qby
  • .raf
  • .rat
  • .raw
  • .rdb
  • .rwl
  • .rwz
  • .s3db
  • .sd0
  • .sda
  • .sdf
  • .sqlite
  • .sqlite3
  • .sqlitedb
  • .sr2
  • .srf
  • .srw
  • .st5
  • .st8
  • .std
  • .sti
  • .stw
  • .stx
  • .sxd
  • .sxg
  • .sxi
  • .sxm
  • .tex
  • .wallet
  • .wb2
  • .wpd
  • .x11
  • .x3f
  • .xis
  • .ycbcra
  • .yuv
  • .contact
  • .dbx
  • .doc
  • .docx
  • .jnt
  • .jpg
  • .msg
  • .oab
  • .ods
  • .pdf
  • .pps
  • .ppsm
  • .ppt
  • .pptm
  • .prf
  • .pst
  • .rar
  • .rtf
  • .txt
  • .wab
  • .xls
  • .xlsx
  • .xml
  • .zip
  • .1cd
  • .3ds
  • .3g2
  • .3gp
  • .7z
  • .7zip
  • .accdb
  • .aoi
  • .asf
  • .asp
  • .aspx
  • .asx
  • .avi
  • .bak
  • .cer
  • .cfg
  • .class
  • .conf
  • .config
  • .css
  • .csv
  • .db
  • .dds
  • .dwg
  • .dxf
  • .flf
  • .flv
  • .html
  • .idx
  • .js
  • .key
  • .kwm
  • .laccdb
  • .ldf
  • .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
  • .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
  • .oil
  • .pas
  • .pat
  • .pef
  • .pfx
  • .ptx
  • .qbb
  • .qbm
  • .sas7bdat
  • .say
  • .st4
  • .st6
  • .stc
  • .sxc
  • .sxw
  • .tlg
  • .wad
  • .xlk
  • .aiff
  • .bin
  • .bmp
  • .cmt
  • .dat
  • .dit
  • .edb
  • .flvv
  • .avhd
  • .back
  • .c
  • .cs
  • .ctl
  • .dbf
  • .disk
  • .dwg
  • .gz
  • .mail
  • .nrg
  • .ora
  • .ova
  • .ovf
  • .pmf
  • .ppt
  • .pptx
  • .pst
  • .pvi
  • .py
  • .pyc
  • .sln
  • .tar
  • .vbs
  • .vcb
  • .vfd
  • .vmc
  • .vsd
  • .vsdx
  • .vsv
  • .work
  • .xvd
  • .123
  • .3dm
  • .602
  • .aes
  • .ARC
  • .asc
  • .bat
  • .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

It encrypts files found in the following folders:

  • Desktop
  • Recent
  • MyPictures
  • MyMusic
  • Personal
  • Favorites
  • {All drives}

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

  • .JezRoz

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

  • {Encrypted file path}\Important_Read_Me.txt

It leaves text files that serve as ransom notes containing the following text:

  SOLUTION

Minimum Scan Engine:

9.850

FIRST VSAPI PATTERN FILE:

13.596.03

FIRST VSAPI PATTERN DATE:

15 Aug 2017

VSAPI OPR PATTERN File:

13.597.00

VSAPI OPR PATTERN Date:

16 Aug 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

Delete this registry value

[ Learn More ]

Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.

 
  • In HKEY_CURRENT_USER\Software\Infinite Tear
    • Install = Yes

Step 4

Search and delete these files

[ 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.
  • {Encrypted file path}\Important_Read_Me.txt

Step 5

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

Step 6

Restore encrypted files from backup.


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