To further show how ransomware is such a pile of crap, a new version of Locky has been released that appends the .shit extension on encrypted files. Like previous variants, this ransomware is installed using a DLL that is executed by Rundll32.exe. Once executed, it will encrypt targeted file types and append the .shit extension to the name of encrypted files.
This variant is currently being distributed through SPAM emails with a subject line of Receipt ###-###. According to MalwareHunterTeam, the attachments in the Locky SPAM emails will contain attachments that are HTA, JS, or WSF files that when executed will download an encrypted DLL installer, decrypt it on the victim’s computer, and then execute it as seen in the image above.
Once the ransomware is executed, it will target over 380 file extension and encrypt them using AES encryption.
The targeted extensions are:
.yuv,.ycbcra,.xis,.wpd,.tex,.sxg,.stx,.srw,.srf,.sqlitedb,.sqlite3,.sqlite,.sdf,.sda,.s3db,.rwz,.rwl,.rdb,.rat,.raf,.qby,.qbx,.qbw,.qbr,.qba,.psafe3,.plc,.plus_muhd,.pdd,.oth,.orf,.odm,.odf,.nyf,.nxl,.nwb,.nrw,.nop,.nef,.ndd,.myd,.mrw,.moneywell,.mny,.mmw,.mfw,.mef,.mdc,.lua,.kpdx,.kdc,.kdbx,.jpe,.incpas,.iiq,.ibz,.ibank,.hbk,.gry,.grey,.gray,.fhd,.ffd,.exf,.erf,.erbsql,.eml,.dxg,.drf,.dng,.dgc,.des,.der,.ddrw,.ddoc,.dcs,.db_journal,.csl,.csh,.crw,.craw,.cib,.cdrw,.cdr6,.cdr5,.cdr4,.cdr3,.bpw,.bgt,.bdb,.bay,.bank,.backupdb,.backup,.back,.awg,.apj,.ait,.agdl,.ads,.adb,.acr,.ach,.accdt,.accdr,.accde,.vmxf,.vmsd,.vhdx,.vhd,.vbox,.stm,.rvt,.qcow,.qed,.pif,.pdb,.pab,.ost,.ogg,.nvram,.ndf,.m2ts,.log,.hpp,.hdd,.groups,.flvv,.edb,.dit,.dat,.cmt,.bin,.aiff,.xlk,.wad,.tlg,.say,.sas7bdat,.qbm,.qbb,.ptx,.pfx,.pef,.pat,.oil,.odc,.nsh,.nsg,.nsf,.nsd,.mos,.indd,.iif,.fpx,.fff,.fdb,.dtd,.design,.ddd,.dcr,.dac,.cdx,.cdf,.blend,.bkp,.adp,.act,.xlr,.xlam,.xla,.wps,.tga,.pspimage,.pct,.pcd,.fxg,.flac,.eps,.dxb,.drw,.dot,.cpi,.cls,.cdr,.arw,.aac,.thm,.srt,.save,.safe,.pwm,.pages,.obj,.mlb,.mbx,.lit,.laccdb,.kwm,.idx,.html,.flf,.dxf,.dwg,.dds,.csv,.css,.config,.cfg,.cer,.asx,.aspx,.aoi,.accdb,.7zip,.xls,.wab,.rtf,.prf,.ppt,.oab,.msg,.mapimail,.jnt,.doc,.dbx,.contact,.mid,.wma,.flv,.mkv,.mov,.avi,.asf,.mpeg,.vob,.mpg,.wmv,.fla,.swf,.wav,.qcow2,.vdi,.vmdk,.vmx,.wallet,.upk,.sav,.ltx,.litesql,.litemod,.lbf,.iwi,.forge,.das,.d3dbsp,.bsa,.bik,.asset,.apk,.gpg,.aes,.ARC,.PAQ,.tar.bz2,.tbk,.bak,.tar,.tgz,.rar,.zip,.djv,.djvu,.svg,.bmp,.png,.gif,.raw,.cgm,.jpeg,.jpg,.tif,.tiff,.NEF,.psd,.cmd,.bat,.class,.jar,.java,.asp,.brd,.sch,.dch,.dip,.vbs,.asm,.pas,.cpp,.php,.ldf,.mdf,.ibd,.MYI,.MYD,.frm,.odb,.dbf,.mdb,.sql,.SQLITEDB,.SQLITE3,.pst,.onetoc2,.asc,.lay6,.lay,.ms11 (Security copy),.sldm,.sldx,.ppsm,.ppsx,.ppam,.docb,.mml,.sxm,.otg,.odg,.uop,.potx,.potm,.pptx,.pptm,.std,.sxd,.pot,.pps,.sti,.sxi,.otp,.odp,.wks,.xltx,.xltm,.xlsx,.xlsm,.xlsb,.slk,.xlw,.xlt,.xlm,.xlc,.dif,.stc,.sxc,.ots,.ods,.hwp,.dotm,.dotx,.docm,.docx,.DOT,.max,.xml,.txt,.CSV,.uot,.RTF,.pdf,.XLS,.PPT,.stw,.sxw,.ott,.odt,.DOC,.pem,.csr,.crt,.keyWhen it has finished encrypting a computer it will display ransom notes with payment instructions. These ransom notes have new names with this version and are named _WHAT_is.html,_[2_digit_number]_WHAT_is.html, and _WHAT_is.bmp.
This configuration for this version as shown by LockyDump is:
Verbose: 0
Loaded: 10000000
The file is a DLL
Read 312 bytes
The headers are different
-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-
Exported name:
setupapi.dll
Exports:
qwerty
-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-
affilID: 3
Seed: 74311
Delay: 63
Persist Svchost: 0
Persist Registry: 0
Ignore Russian Machines: 1
CallbackPath: /linuxsucks.php
C2Servers: 109.234.35.215,91.200.14.124,185.10
RsaKeyID: 542
RsaKeySizeBytes: 114
Key Alg: A400
Key: RSA1
Key Bits: 2048
Key Exponent: 10001
Key Bytes:
C3 3F 68 D4 B1 C9 A6 2F
4D 33 A2 92 E2 99 3C AE
BC 6D 3F 3E D0 EE 9F 51
D8 33 94 2D A3 39 77 18
5A AD E7 53 0E 01 57 EE
94 EE 4A 2C 47 3B 4F 59
0F 5B EA 09 C0 95 EA 64
F2 6E BD EC A2 99 61 E4
D7 80 78 ED F4 73 86 B3
AB 30 38 81 E1 DC FC 41
68 84 F1 E8 9D DE 1D 6F
21 C9 1C 8C 2D B4 0E B8
AF E6 50 36 D7 B2 AB 20
32 9A EC 86 13 61 19 D2
F5 C2 3A E3 4C 96 4A 46
49 99 EF FC 46 BC 6E 07
12 BD 6C 66 70 5B F2 DA
7C 8F 39 77 62 12 C3 D3
1A 93 91 76 0B EB 96 9E
31 DE C0 4B EF BF DC 80
DD C7 17 5E 88 B7 CE 2F
79 43 B2 B9 8B A7 E4 FA
6D C4 42 3E E5 BD 26 6F
C1 34 D5 E1 66 30 65 83
84 DD 31 2F 03 88 42 2A
53 76 1C A7 DD EB 20 E5
F6 90 4C 45 8A 83 A3 FD
A0 96 F3 A8 F4 78 E4 74
48 1D A7 87 C8 51 9F C7
98 3F 1F 7B 69 BA B4 2F
98 EC 3E 30 79 4E 45 8A
D2 68 49 66 56 6F D5 BA
Unfortunately, like previous versions this variant cannot be decrypted for free.
Working as a cyber security solutions architect, Alisa focuses on application and network security. Before joining us she held a cyber security researcher positions within a variety of cyber security start-ups. She also experience in different industry domains like finance, healthcare and consumer products.
