RANSOM_HOTDEM.A
Windows
Threat Type: Trojan
Destructiveness: No
Encrypted: Yes
In the wild: Yes
OVERVIEW
Dropped by other malware, Downloaded from the Internet
This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
TECHNICAL DETAILS
178,176 bytes
EXE
No
07 Nov 2016
Encrypts files, renames files, Drops files, Connects to URLs/IPs
Arrival Details
This Trojan 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 Trojan drops the following files:
- {folders containing encrypted files}\README_PLEASE.txt - ransom note
Backdoor Routine
This Trojan connects to the following URL(s) to send and receive commands from a remote malicious user:
- http://{BLOCKED}.{BLOCKED}.41.76/g.php?
Other Details
This Trojan encrypts files with the following extensions:
- .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
- .arc
- .ari
- .arj
- .aro
- .arr
- .arw
- .asa
- .asc
- .ascx
- .ase
- .asf
- .ashx
- .asmx
- .asp
- .asr
- .avi
- .avs
- .bak
- .bay
- .bck
- .bdp
- .bdr
- .bib
- .bic
- .big
- .bik
- .bkf
- .blp
- .bmc
- .bmf
- .bml
- .bmp
- .boc
- .bp2
- .bp3
- .bpl
- .bsp
- .cag
- .cam
- .cap
- .car
- .cbr
- .cbz
- .cc
- .ccd
- .cch
- .cd
- .cdr
- .cer
- .cfg
- .cgf
- .chk
- .clr
- .cms
- .cod
- .col
- .cp
- .cpp
- .cr2
- .crd
- .crt
- .crw
- .cs
- .csi
- .cso
- .ctt
- .cty
- .cwf
- .dal
- .dap
- .dbb
- .dbf
- .dbx
- .dcp
- .dcr
- .dcu
- .ddc
- .ddcx
- .dem
- .der
- .dev
- .dex
- .dic
- .dif
- .dii
- .dir
- .disk
- .divx
- .diz
- .djvu
- .dmg
- .dng
- .dob
- .doc
- .docm
- .docx
- .dot
- .dotm
- .dotx
- .dox
- .dpk
- .dpl
- .dpr
- .dsk
- .dsp
- .dvd
- .dvi
- .dvx
- .dwg
- .dxe
- .dxf
- .dxg
- .elf
- .eps
- .eql
- .erf
- .err
- .euc
- .evo
- .ex
- .exif
- .f90
- .faq
- .fcd
- .fdr
- .fds
- .ff
- .fla
- .flp
- .flv
- .for
- .fpp
- .gam
- .gif
- .grf
- .gthr
- .gz
- .gzig
- .h3m
- .h4r
- .htm
- .html
- .idx
- .img
- .indd
- .ink
- .ipa
- .isu
- .isz
- .itdb
- .itl
- .iwd
- .jar
- .jav
- .java
- .jc
- .jfif
- .jgz
- .jif
- .jiff
- .jpc
- .jpeg
- .jpf
- .jpg
- .jpw
- .js
- .kdc
- .kmz
- .kwd
- .lbi
- .lcd
- .lcf
- .ldb
- .lgp
- .log
- .lp2
- .ltm
- .ltr
- .lvl
- .mag
- .man
- .map
- .max
- .mbox
- .mbx
- .mcd
- .md3
- .mdb
- .mdf
- .mdl
- .mdn
- .mds
- .mef
- .mic
- .mip
- .mlx
- .mod
- .moz
- .mp3
- .mp4
- .mpeg
- .mpg
- .mrw
- .msg
- .msp
- .mxp
- .nav
- .ncd
- .nds
- .nef
- .nfo
- .now
- .nrg
- .nri
- .nrw
- .odb
- .odc
- .odf
- .odi
- .odm
- .odp
- .ods
- .odt
- .oft
- .oga
- .ogg
- .opf
- .orf
- .owl
- .oxt
- .p12
- .p7b
- .p7c
- .pab
- .pak
- .pbf
- .pbp
- .pbs
- .pcv
- .pdd
- .pef
- .pem
- .pfx
- .php
- .pkb
- .pkh
- .pl
- .plc
- .pli
- .pm
- .png
- .pot
- .potm
- .potx
- .ppd
- .ppf
- .pps
- .ppsm
- .ppsx
- .ppt
- .pptm
- .pptx
- .prc
- .prt
- .psa
- .psd
- .pst
- .ptx
- .puz
- .pwf
- .pwi
- .pxp
- .qbb
- .qdf
- .qel
- .qif
- .qpx
- .qtq
- .qtr
- .r3d
- .ra
- .raf
- .rar
- .raw
- .res
- .rev
- .rgn
- .rng
- .rrt
- .rsrc
- .rsw
- .rte
- .rtf
- .rts
- .rtx
- .rum
- .run
- .rv
- .rw2
- .rwl
- .sad
- .saf
- .sav
- .scm
- .scn
- .scx
- .sdb
- .sdc
- .sdn
- .sds
- .sdt
- .sen
- .sfs
- .sfx
- .sh
- .shar
- .shr
- .shw
- .slt
- .snp
- .so
- .spr
- .sql
- .sqx
- .sr2
- .srf
- .srt
- .srw
- .ssa
- .std
- .stt
- .stx
- .sud
- .svi
- .svr
- .swd
- .swf
- .tar
- .tax2013
- .tax2014
- .tbz2
- .tch
- .tcx
- .text
- .tg
- .thmx
- .tif
- .tlz
- .tpu
- .tpx
- .trp
- .tu
- .tur
- .txd
- .txf
- .txt
- .uax
- .udf
- .umx
- .unr
- .unx
- .uop
- .upoi
- .url
- .usa
- .usx
- .ut2
- .ut3
- .utc
- .utx
- .uvx
- .uxx
- .val
- .vc
- .vcd
- .vdo
- .ver
- .vhd
- .vmf
- .vmt
- .vsi
- .vtf
- .w3g
- .w3x
- .wad
- .war
- .wav
- .wave
- .waw
- .wb2
- .wbk
- .wdgt
- .wks
- .wm
- .wma
- .wmd
- .wmdb
- .wmmp
- .wmv
- .wmx
- .wow
- .wpd
- .wpk
- .wpl
- .wps
- .wsh
- .wtd
- .wtf
- .wvx
- .x3f
- .xl
- .xla
- .xlam
- .xlc
- .xlk
- .xll
- .xlm
- .xlr
- .xls
- .xlsb
- .xlsm
- .xlsx
- .xltx
- .xlv
- .xlwx
- .xpi
- .xpt
- .xvid
- .xwd
- .yab
- .yps
- .z02
- .z04
- .zap
- .zip
- .zipx
- .zoo
It renames encrypted files using the following names:
- {original filename and extension}.lrmethod
It does the following:
- It prevents encrypting files in the following directories:
- \Documents and Settings\NetworkService\
- \Documents and Settings\LocalService\
- \Documents and Settings\Default User\
- \Documents and Settings\All Users\
- \Local Settings\
- \Recycler\
- \AppData\Roaming\
- \AppData\LocalLow\
- \AppData\Local\
- \Drivers\
- \Recovery\
- \System Volume Information\
- \ProgramData\
- \Users\All Users\
- \$Recycle.Bin\
- \Boot\
- \Windows\
SOLUTION
9.800
12.906.09
19 Nov 2016
12.907.00
20 Nov 2016
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
Restart in Safe Mode
Step 4
Search and delete this file
- {folders containing encrypted files}\README_PLEASE.txt
Step 5
Restart in normal mode and scan your computer with your Trend Micro product for files detected as RANSOM_HOTDEM.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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