RANSOM_CHIP.C

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 retrieves specific information from the affected system.

It connects to certain websites to send and receive information. It deletes itself after execution.

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:

• {folder containing encrypted files}\ATLAS_FILES.txt - ransom note
• {fixed and removable disk drive letter}\{6 random characters} - dummy file to check if the drive is writable, file is deleted after checking

It drops and executes the following files:

• %User Profile%\bye.bat - terminates the malware process, then deletes the malware file and this batch file afterwards

(Note: %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003, or C:\Users\{user name} on Windows Vista and 7.)

Information Theft

This Ransomware retrieves the following information from the affected system:

• Windows Version and Processor Type
• Drive Letters of Available and Writable Disk Drives
• Computer Name
• Windows Directory
• External IP Address

Other Details

This Ransomware connects to the following URL(s) to get the affected system's IP address:

• checkip.dyndns.org

It connects to the following website to send and receive information:

• http://{BLOCKED}.{BLOCKED}.7.69/index.php

It encrypts files with the following extensions:

• .000
• .001
• .002
• .2015
• .3ds
• .3fr
• .500
• .7z
• .accdb
• .ai
• .amj
• .apk
• .arch00
• .arw
• .asc
• .asset
• .avi
• .az
• .bar
• .bay
• .bc6
• .bc7
• .bd2
• .big
• .bik
• .bkf
• .bkp
• .blob
• .bpn
• .bsa
• .cab
• .cas
• .cdr
• .cdt
• .cer
• .cfp
• .cfr
• .cr2
• .crt
• .crw
• .crypto
• .cryptobyte
• .css
• .csv
• .d3dbsp
• .dac
• .das
• .dat
• .dazip
• .db
• .db0
• .dba
• .dbf
• .dcr
• .der
• .desc
• .dmp
• .dng
• .doc
• .docm
• .docx
• .dwg
• .dxg
• .ebc
• .ebq
• .enz
• .epb
• .epk
• .eps
• .erf
• .esm
• .ets
• .fdb
• .ff
• .flv
• .forge
• .fos
• .fpk
• .fsh
• .gdb
• .gho
• .gpc
• .hkdb
• .hkx
• .hplg
• .hvpl
• .ibank
• .icxs
• .IIF
• .indd
• .inf
• .ipt
• .itdb
• .itf
• .itl
• .itm
• .iwd
• .iwi
• .jpe
• .jpeg
• .jpg
• .js
• .kdb
• .kdc
• .kf
• .layout
• .lbf
• .lgb
• .litemod
• .lrf
• .ltx
• .lvl
• .m2
• .m3u
• .m4a
• .map
• .max
• .mcmeta
• .mdb
• .mdbackup
• .mddata
• .mdf
• .mef
• .menu
• .mlx
• .mmm
• .mny
• .mov
• .mp4
• .mpqge
• .mrwref
• .myd
• .mye
• .myo
• .myob
• .myox
• .mysql
• .ncf
• .nd
• .nrw
• .ntl
• .odb
• .odc
• .odm
• .odp
• .ods
• .odt
• .ofx
• .onion
• .orf
• .p12
• .p7b
• .p7c
• .pak
• .pdd
• .pdf
• .pef
• .pem
• .pfx
• .pkpass
• .png
• .ppt
• .pptm
• .pptx
• .psb
• .psd
• .psk
• .pst
• .ptb
• .ptx
• .py
• .qba
• .qbatlg
• .qbb
• .qbk
• .qbm
• .qbmb
• .qbo
• .qbw
• .qbx
• .qby
• .qdf
• .qfx
• .qic
• .qif
• .qsd
• .qtx
• .r3d
• .raf
• .rar
• .raw
• .rb
• .re4
• .rgss3a
• .rim
• .rofl
• .rtf
• .rw2
• .rwl
• .sai
• .saj
• .sav
• .sb
• .sdb
• .sid
• .sidd
• .sidn
• .sie
• .sis
• .slm
• .snx
• .sql
• .sr2
• .srf
• .srw
• .sum
• .svg
• .syncdb
• .t11
• .t12
• .t13
• .t14
• .t15
• .t16
• .t17
• .tax
• .tax2013
• .tax2014
• .tax2015
• .tax2016
• .tax2017
• .tiff
• .tlg
• .tor
• .tt14
• .tt15
• .tt16
• .txf
• .txt
• .upk
• .vbk
• .vcf
• .vdf
• .vfs0
• .vmx
• .vpk
• .vpp_pc
• .vtf
• .w3x
• .wallet
• .wb2
• .wma
• .wmo
• .wmv
• .wotreplay
• .wpd
• .wps
• .x3f
• .xf
• .xlk
• .xls
• .xlsb
• .xlsm
• .xlsx
• .xml
• .xtbl
• .xxx
• .zip
• .ztmp

It renames encrypted files using the following names:

• {original filename and extension}.ATLAS

It does the following:

• This ransomware deletes all shadow copies by executing the following command:
  vssadmin delete shadows /all /quiet
• It avoids encrypting files containing any of the strings in its full path name:
  • C:\Windows\
  • C:\Program Files\
  • C:\ProgramData\
  • C:\Documents and Settings\All Users\
  • C:\Users\{username}\AppData\
  • C:\Documents and Settings\{username}\Application Data\
  • %PROGRAMFILE\
  • microsoft
  • Microsoft
  • $Recycle.Bin
  • RECYCLER
  • $RECYCLE.BIN
• It encrypts files in fixed, removable, RAM disk drives, and network shares.

It deletes itself after execution.

NOTES:

The ransom note ATLAS_FILES.txt contains the following: