FANDOM



Fantom is a trojan-like ransomware on Microsoft Windows that masquerades as a critical Windows Update. It is based on the open-source EDA2 ransomware project. However, should the user install this "update", Fantom will encrypt the user's files.

Payloads

When executed, the ransomware will extract and execute another embedded program called WindowsUpdate.exe that displays the fake Windows Update screen shown below. This screen overlays all of the active Windows and does not allow you to switch to any other open applications.

This is done to make it look like the fake update is being installed and to provide a reason for the increased activity on the victim's hard drives.

Just like other EDA2 based ransomware, it will generate a random AES-128 key, encrypt it using RSA, and then upload it to the malware developers Command & Control server.

It then begins to scan the local drives for files that contain targeted file extensions and encrypt them using AES-128 encryption. When it encrypts a file it will append the .fantom extension to the encrypted file.  For example, apple.jpg would be encrypted as a file named apple.jpg.fantom. In each folder that it encrypts a file, it will also create a DECRYPT_YOUR_FILES.HTML ransom note.

Fantom will also create two batch files that are executed when the encryption is finished. These batch files will delete the shadow volume copies and fake Windows update executable.

The ransomware will display the ransom note called DECRYPT_YOUR_FILES.HTML that includes the victim's ID key and provides instructions to email fantomd12@yandex.ru or fantom12@techemail.com in order to receive payment instructions.  

Finally, the ransomware will download an image from and save it to %UserProfile%\2d5s8g4ed.jpg. This image is downloaded from the following URL, which may provide a clue as to the developer's identity:

http://content.screencast.com/users/Gurudrag/folders/Default/media/9289aabe-7b4a-4c7f-b3bb-bdf3407e7a2f/fantom1.jpg

This image is then used as the windows wallpaper.

Technical Details

Files created by Fantom:

%AppData%\delback.bat
[Executable_Path]\WindowsUpdate.exe
[Executable_Path]\update.bat
%UserProfile%\2d5s8g4ed.jpg

Registry entries created by Fantom:

HKCU\Control Panel\Desktop\ "Wallpaper"	"%UserProfile%\How to decrypt your files.jpg"
HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System "DisableTaskMgr" = 1

Network Communication:

http://powertoolsforyou.com/themes/prestashop/cache/stats.php
http://templatesupdates.dlinkddns.com/falssk/fksgieksi.php

Hashes:

SHA256:	f4234a501edcd30d3bc15c983692c9450383b73bdd310059405c5e3a43cc730b

Targeted File Extensions:

 .001, .1cd, .3d, .3d4, .3df8, .3fr, .3g2, .3gp, .3gp2, .3mm, .7z, .aac, .abk, .abw, .ac3, .accdb, .ace, .act, .ade, .adi, .adpb, .adr, .adt, .ai, .aim, .aip, .ais, .amf, .amr, .amu, .amx, .amxx, .ans, .ap, .ape, .api, .apk, .arc, .arch00, .ari, .arj, .aro, .arr, .arw, .asa, .asc, .ascx, .ase, .asf, .ashx, .asmx, .asp, .aspx, .asr, .asset, .avi, .avs, .bak, .bar, .bay, .bc6, .bc7, .bck, .bdp, .bdr, .bib, .bic, .big, .bik, .bkf, .bkp, .blob, .blp, .bmc, .bmf, .bml, .bmp, .boc, .bp2, .bp3, .bpl, .bsa, .bsp, .cag, .cam, .cap, .car, .cas, .cbr, .cbz, .cc, .ccd, .cch, .cd, .cdr, .cer, .cfg, .cfr, .cgf, .chk, .clr, .cms, .cod, .col, .cp, .cpp, .cr2, .crd, .crt, .crw, .cs, .csi, .cso, .css, .csv, .ctt, .cty, .cwf, .d3dbsp, .dal, .dap, .das, .dayzprofile, .dazip, .db0, .dbb, .dbf, .dbfv, .dbx, .dcp, .dcr, .dcu, .ddc, .ddcx, .dem, .der, .desc, .dev, .dex, .dic, .dif, .dii, .dir, .disk, .divx, .diz, .djvu, .dmg, .dmp, .dng, .dob, .doc, .docm, .docx, .dot, .dotm, .dotx, .dox, .dpk, .dpl, .dpr, .dsk, .dsp, .dvd, .dvi, .dvx, .dwg, .dxe, .dxf, .dxg, .elf, .epk, .eps, .eql, .erf, .err, .esm, .euc, .evo, .ex, .exif , .f90, .faq, .fcd, .fdr, .fds, .ff, .fla, .flac, .flp, .flv, .for, .forge, .fos, .fpk, .fpp, .fsh, .gam, .gdb, .gho, .gif, .grf, .gthr, .gz, .gzig, .gzip, .h3m, .h4r, .hkdb, .hkx, .hplg, .htm, .html, .hvpl, .ibank, .icxs, .idx, .ifo, .img, .indd, .ink, .ipa, .isu, .isz, .itdb, .itl, .itm, .iwd, .iwi, .jar, .jav, .java, .jc, .jfif, .jgz, .jif, .jiff, .jpc, .jpe, .jpeg, .jpf, .jpg, .jpw, .js, .json, .kdb, .kdc, .kf, .kmz, .kwd, .kwm, .layout, .lbf, .lbi, .lcd, .lcf, .ldb, .lgp, .litemod, .log, .lp2, .lrf, .ltm, .ltr, .ltx, .lvl, .m2, .m2v, .m3u, .m4a, .mag, .man, .map, .max, .mbox, .mbx, .mcd, .mcgame, .mcmeta, .md, .md3, .mdb, .mdbackup, .mddata, .mdf, .mdl, .mdn, .mds, .mef, .menu, .mic, .mip, .mkv, .mlx, .mod, .mov, .moz, .mp3, .mp4, .mpeg, .mpg, .mpqge, .mrw, .mrwref, .msg, .msp, .mxp, .nav, .ncd, .ncf, .nds, .nef, .nfo, .now, .nrg, .nri, .nrw, .ntl, .odb, .odc, .odf, .odi, .odm, .odp, .ods, .odt, .odtb .oft, .oga, .ogg, .opf, .orf, .owl, .oxt, .p12, .p7b, .p7c, .pab, .pak, .pbf, .pbp, .pbs, .pcv, .pdd, .pdf, .pef, .pem, .pfx, .php, .pkb, .pkh, .pkpass, .pl, .plc, .pli, .pm, .png, .pot, .potm, .potx, .ppd, .ppf, .pps, .ppsm, .ppsx, .ppt, .pptm, .pptx, .prc, .prt, .psa, .psd, .psk, .pst, .ptx, .puz, .pwf, .pwi, .pwm, .pxp, .py, .qbb, .qdf, .qel, .qic, .qif, .qpx, .qtq, .qtr, .r3d, .ra, .raf, .rar, .raw, .rb, .re4, .res, .rev, .rgn, .rgss3a, .rim, .rng, .rofl, .rrt, .rsrc, .rsw, .rte, .rtf, .rts, .rtx, .rum, .run, .rv, .rw2, .rwl, .sad, .saf, .sav, .sb, .sc2save, .scm, .scn, .scx, .sdb, .sdc, .sdn, .sds, .sdt, .sen, .sfs, .sfx, .sh, .shar, .shr, .shw, .sid, .sidd, .sidn, .sie, .sis, .slm, .sln, .slt, .snp, .snx, .so, .spr, .sql, .sqx, .sr2, .srf, .srt, .srw, .ssa, .std, .stt, .stx, .sud, .sum, .svg, .svi, .svr, .swd, .swf, .syncdb, .t12, .t13, .tar, .tax, .tax2015, .tax2016, .tbz2, .tch, .tcx, .text, .tg, .thmx, .tif, .tlz, .tor, .tpu, .tpx, .trp, .tu, .tur, .txd, .txf, .txt, .uax, .udf, .umx, .unity3d, .unr, .unx, .uop, .upk, .upoi, .url, .usa, .usx, .ut2, .ut3, .utc, .utx, .uvx, .uxx, .val, .vc, .vcd, .vdf, .vdo, .ver, .vfs0, .vhd, .vmf, .vmt, .vob, .vpk, .vpp_pc, .vsi, .vtf, .w3g, .w3x, .wad, .war, .wav, .wave, .waw, .wb2, .wbk, .wdgt, .wks, .wm, .wma, .wmd, .wmdb, .wmmp, .wmo, .wmv, .wmx, .wotreplay, .wow, .wpd, .wpk, .wpl, .wps, .wsh, .wtd, .wtf, .wvx, .x3f, .xf, .xl, .xla, .xlam, .xlc, .xlk, .xll, .xlm, .xlr, .xls, .xlsb, .xlsm, .xlsx, .xltx, .xlv, .xlwx, .xml, .xpi, .xpt, .xvid, .xwd, .xxx, .yab, .yps, .z02, .z04, .zap, .zip, .zipx, .zoo, .ztmp

Media

The Windows update that encrypts your files! Fantom Ransomware

The Windows update that encrypts your files! Fantom Ransomware

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