RANSOM_ANTIX.A

January 17, 2017
 Analysis by: Homer Pacag
 ALIASES:

Ransom.FileLocker (Malwarebytes); Ransom:Win32/Genasom!rfn (Microsoft);

 PLATFORM:

Windows

 OVERALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:
 INFORMATION EXPOSURE:

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

Infection Channel:

Downloaded from the Internet, Dropped by other malware

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

File Size:

8,150,528 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

13 Dec 2016

Payload:

Encrypts files

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.

Other Details

This Trojan encrypts files with the following extensions:

  • .contact
  • .dbx
  • .doc
  • .docx
  • .jnt
  • .jpg
  • .mapimail
  • .msg
  • .oab
  • .ods
  • .pdf
  • .pps
  • .ppsm
  • .ppt
  • .pptm
  • .prf
  • .pst
  • .rar
  • .rtf
  • .txt
  • .wab
  • .xls
  • .xlsx
  • .xml
  • .zip
  • .7zip
  • .accdb
  • .aoi
  • .asf
  • .asp
  • .aspx
  • .asx
  • .avi
  • .bak
  • .cer
  • .cfg
  • .class
  • .config
  • .css
  • .csv
  • .dds
  • .dwg
  • .dxf
  • .flf
  • .flv
  • .html
  • .idx
  • .key
  • .kwm
  • .laccdb
  • .ldf
  • .lit
  • .mbx
  • .mdf
  • .mid
  • .mlb
  • .mov
  • .mpg
  • .obj
  • .odt
  • .pages
  • .php
  • .psd
  • .pwm
  • .safe
  • .sav
  • .save
  • .sql
  • .srt
  • .swf
  • .thm
  • .vob
  • .wav
  • .wma
  • .wmv
  • .xlsb
  • .aac
  • .arw
  • .cdr
  • .cls
  • .cpi
  • .cpp
  • .docm
  • .dot
  • .dotm
  • .dotx
  • .drw
  • .dxb
  • .eps
  • .fla
  • .flac
  • .fxg
  • .java
  • .max
  • .mdb
  • .pcd
  • .pct
  • .potm
  • .potx
  • .ppam
  • .ppsm
  • .ppsx
  • .pptm
  • .pspimage
  • .sldm
  • .sldx
  • .svg
  • .tga
  • .wps
  • .xla
  • .xlam
  • .xlm
  • .xlr
  • .xlsm
  • .xlt
  • .xltm
  • .xltx
  • .xlw
  • .act
  • .adp
  • .bkp
  • .blend
  • .cdf
  • .cdx
  • .cgm
  • .crt
  • .dac
  • .dbf
  • .dcr
  • .ddd
  • .design
  • .dtd
  • .fdb
  • .fff
  • .fpx
  • .iif
  • .indd
  • .jpeg
  • .mos
  • .nsd
  • .nsf
  • .nsg
  • .nsh
  • .odc
  • .odp
  • .oil
  • .pas
  • .pat
  • .pef
  • .pfx
  • .ptx
  • .qbb
  • .qbm
  • .sas7bdat
  • .say
  • .stc
  • .sxc
  • .sxw
  • .tlg
  • .wad
  • .xlk
  • .aiff
  • .bin
  • .bmp
  • .cmt
  • .dat
  • .dit
  • .edb
  • .flvv
  • .gif
  • .groups
  • .hdd
  • .hpp
  • .log
  • .m2ts
  • .mkv
  • .mpeg
  • .ndf
  • .nvram
  • .ogg
  • .ost
  • .pab
  • .pdb
  • .pif
  • .png
  • .qed
  • .qcow
  • .qcow2
  • .rvt
  • .stm
  • .vbox
  • .vdi
  • .vhd
  • .vhdx
  • .vmdk
  • .vmsd
  • .vmx
  • .vmxf
  • .accde
  • .accdr
  • .accdt
  • .ach
  • .acr
  • .adb
  • .ads
  • .agdl
  • .ait
  • .apj
  • .asm
  • .awg
  • .back
  • .backup
  • .backupdb
  • .bank
  • .bay
  • .bdb
  • .bgt
  • .bik
  • .bpw
  • .cdr3
  • .cdr4
  • .cdr5
  • .cdr6
  • .cdrw
  • .cib
  • .craw
  • .crw
  • .csh
  • .csl
  • .db_journal
  • .dcs
  • .ddoc
  • .ddrw
  • .der
  • .des
  • .dgc
  • .djvu
  • .dng
  • .drf
  • .dxg
  • .eml
  • .erbsql
  • .erf
  • .exf
  • .ffd
  • .fhd
  • .gray
  • .grey
  • .gry
  • .hbk
  • .ibank
  • .ibd
  • .ibz
  • .iiq
  • .incpas
  • .jpe
  • .kdbx
  • .kdc
  • .kpdx
  • .lua
  • .mdc
  • .mef
  • .mfw
  • .mmw
  • .mny
  • .moneywell
  • .mrw
  • .myd
  • .ndd
  • .nef
  • .nop
  • .nrw
  • .nwb
  • .nxl
  • .nyf
  • .odb
  • .odf
  • .odg
  • .odm
  • .orf
  • .otg
  • .oth
  • .otp
  • .ots
  • .ott
  • .pdd
  • .pem
  • .plus_muhd
  • .plc
  • .pot
  • .pptx
  • .psafe3
  • .qba
  • .qbr
  • .qbw
  • .qbx
  • .qby
  • .raf
  • .rat
  • .raw
  • .rdb
  • .rwl
  • .rwz
  • .s3db
  • .sda
  • .sdf
  • .sqlite
  • .sqlite3
  • .sqlitedb
  • .srf
  • .srw
  • .std
  • .sti
  • .stw
  • .stx
  • .sxd
  • .sxg
  • .sxi
  • .sxm
  • .tex
  • .wallet
  • .wpd
  • .xis
  • .ycbcra
  • .yuv

NOTES:

This ransomware displays the following:

  SOLUTION

Minimum Scan Engine:

9.800

FIRST VSAPI PATTERN FILE:

12.958.03

FIRST VSAPI PATTERN DATE:

13 Dec 2016

VSAPI OPR PATTERN File:

12.959.00

VSAPI OPR PATTERN Date:

13 Dec 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

Scan your computer with your Trend Micro product to delete files detected as RANSOM_ANTIX.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 4

Restore encrypted files from backup.


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