Analysis by: Jennifer Gumban

 PLATFORM:

Windows

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW

Infection Channel: Spammed via email

This ransomware is delivered as an attached document, via spam email. It disguises itself as a fake Thai customs form. Instead of the usual ransom note, MIRCOP demands to be paid back, assuming affected users know how ransomware payment works. It also asks for more than 40 bitcoins in payment - one of the highest seen as of this writing.

To get a one-glance comprehensive view of the behavior of this Trojan, refer to the Threat Diagram shown below.

This Trojan arrives as an attachment to email messages spammed by other malware/grayware or malicious users.

It steals certain information from the system and/or the user.

  TECHNICAL DETAILS

File Size: 1,363,285 bytes
File Type: EXE
Memory Resident: Yes
Initial Samples Received Date: 22 Jun 2016
Payload: Connects to URLs/IPs, Steals information, Encrypts files, Displays message/message boxes

Arrival Details

This Trojan arrives as an attachment to email messages spammed by other malware/grayware or malicious users.

Installation

This Trojan drops the following file(s)/component(s):

  • %User Startup%\MicroCop.lnk
  • %User Temp%\PassW8.txt
  • %User Temp%\Sqlite.dll
  • %User Temp%\c.exe - steals information
  • %User Temp%\wl.jpg - wallpaper
  • %User Temp%\x.exe - encrypts files
  • %User Temp%\y.exe - encrypts files

(Note: %User Startup% is the current user's Startup folder, which is usually C:\Documents and Settings\{user}\Start Menu\Programs\Startup on Windows 2000 and XP, and C:\Documents and Settings\{User name}\Start Menu\Programs\Startup on Windows Vista, 7, and 8.. %User Temp% is the user's temporary folder, where it usually is C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local\Temp on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.)

Other System Modifications

This Trojan adds the following registry entries:

HKEY_CURRENT_USER\Control Panel\Desktop
Wallpaper = "%User Temp%\wl.jpg"

Download Routine

This Trojan connects to the following website(s) to download and execute a malicious file:

  • http://www.{BLOCKED}y.nl/u/putty.exe

Information Theft

This Trojan steals the following information:

  • Filezilla
  • Windows Mail
  • Mozilla Firefox
  • Google Chrome
  • Opera
  • Filezilla
  • Skype

Other Details

This Trojan encrypts files with the following extensions:

  • .386
  • .a
  • .accda
  • .accdb
  • .accdc
  • .accde
  • .accdr
  • .accdt
  • .accdu
  • .acl
  • .ade
  • .adn
  • .adp
  • .ai
  • .aif
  • .aifc
  • .aiff
  • .ani
  • .ans
  • .api
  • .aps
  • .art
  • .asa
  • .asc
  • .ascx
  • .asf
  • .asm
  • .asmx
  • .asp
  • .aspx
  • .asx
  • .au
  • .avi
  • .aw
  • .bas
  • .bat
  • .bcp
  • .bin
  • .bkf
  • .blg
  • .bmp
  • .bsc
  • .btapp
  • .btkey
  • .btskin
  • .c
  • .cab
  • .camp
  • .cat
  • .cc
  • .cda
  • .cdmp
  • .cdx
  • .cer
  • .cgm
  • .chk
  • .chm
  • .cls
  • .cmd
  • .cod
  • .com
  • .config
  • .cpl
  • .cpp
  • .crd
  • .crds
  • .crl
  • .crt
  • .crtx
  • .cs
  • .csa
  • .csproj
  • .css
  • .csv
  • .cur
  • .cxx
  • .dat
  • .db
  • .dbg
  • .dbs
  • .dcr
  • .dct
  • .def
  • .der
  • .det
  • .dib
  • .dic
  • .dir
  • .disco
  • .diz
  • .dll
  • .dl_
  • .doc
  • .docm
  • .docx
  • .docxml
  • .dos
  • .dot
  • .dotm
  • .dotx
  • .dqy
  • .drv
  • .dsn
  • .dsp
  • .dsw
  • .dtd
  • .dwfx
  • .dxr
  • .easmx
  • .edrwx
  • .elm
  • .emf
  • .epf
  • .eprtx
  • .eps
  • .etp
  • .evt
  • .evtx
  • .exc
  • .exp
  • .ext
  • .ex_
  • .eyb
  • .fad
  • .faq
  • .fav
  • .fdf
  • .fdm
  • .fif
  • .fky
  • .fnd
  • .fnt
  • .fon
  • .gadget
  • .gcsx
  • .gfs
  • .ghi
  • .gif
  • .glk
  • .glox
  • .gmmp
  • .gqsx
  • .gra
  • .group
  • .grp
  • .grv
  • .gsa
  • .gta
  • .gz
  • .h
  • .H1C
  • .H1D
  • .H1F
  • .H1H
  • .H1K
  • .H1Q
  • .H1S
  • .H1T
  • .H1V
  • .H1W
  • .hdp
  • .hhc
  • .hlp
  • .hol
  • .hpp
  • .hqx
  • .hta
  • .htc
  • .htm
  • .html
  • .htt
  • .htw
  • .htx
  • .hxa
  • .hxc
  • .hxd
  • .hxe
  • .hxf
  • .hxh
  • .hxi
  • .hxk
  • .hxq
  • .hxr
  • .hxs
  • .hxt
  • .hxv
  • .hxw
  • .hxx
  • .i
  • .ibc
  • .ibq
  • .icc
  • .icl
  • .icm
  • .ico
  • .ics
  • .idl
  • .idq
  • .ilk
  • .imc
  • .img
  • .inc
  • .inf
  • .ini
  • .inl
  • .inv
  • .inx
  • .in_
  • .iqy
  • .iso
  • .IVF
  • .jar
  • .jav
  • .java
  • .jbf
  • .jfif
  • .jnlp
  • .jnt
  • .Job
  • .jod
  • .jpe
  • .jpeg
  • .jpg
  • .js
  • .JSE
  • .jtp
  • .jtx
  • .kci
  • .label
  • .laccdb
  • .latex
  • .ldb
  • .lex
  • .lgn
  • .lib
  • .lnk
  • .local
  • .log
  • .lst
  • .m14
  • .m1v
  • .m3u
  • .m4a
  • .mad
  • .maf
  • .mag
  • .mak
  • .mam
  • .man
  • .maq
  • .mar
  • .mas
  • .mat
  • .mau
  • .mav
  • .maw
  • .mda
  • .mdb
  • .mde
  • .mdn
  • .mdt
  • .mdw
  • .mgc
  • .mht
  • .mhtml
  • .mid
  • .midi
  • .mig
  • .mk
  • .mlc
  • .mmf
  • .mml
  • .mmw
  • .mov
  • .movie
  • .mp2
  • .mp2v
  • .mp3
  • .mpa
  • .mpe
  • .mpeg
  • .mpf
  • .mpg
  • .mpv2
  • .msc
  • .msg
  • .msi
  • .msp
  • .msu
  • .mv
  • .mydocs
  • .ncb
  • .nfo
  • .nick
  • .nk2
  • .nls
  • .nvr
  • .obj
  • .ocx
  • .oc_
  • .odc
  • .odh
  • .odl
  • .odt
  • .ofs
  • .oft
  • .ols
  • .one
  • .onepkg
  • .onetoc
  • .opc
  • .oqy
  • .osdx
  • .ost
  • .otf
  • .otm
  • .p10
  • .p12
  • .p7b
  • .p7c
  • .p7m
  • .p7r
  • .p7s
  • .pab
  • .pbk
  • .pcb
  • .pch
  • .pdb
  • .pdf
  • .pdfxml
  • .pds
  • .pdx
  • .pfm
  • .pfx
  • .php3
  • .pic
  • .pif
  • .pip
  • .pko
  • .pl
  • .plg
  • .pls
  • .pma
  • .pmc
  • .pml
  • .pmr
  • .pnf
  • .png
  • .pot
  • .potm
  • .potx
  • .ppa
  • .ppam
  • .pps
  • .ppsm
  • .ppsx
  • .ppt
  • .pptm
  • .pptx
  • .pptxml
  • .prc
  • .prf
  • .ps
  • .ps1
  • .ps1xml
  • .psc1
  • .psd
  • .psd1
  • .psm1
  • .pst
  • .pub
  • .pwz
  • .py
  • .pyc
  • .pyo
  • .pys
  • .pyw
  • .qds
  • .rat
  • .rc
  • .rc2
  • .rct
  • .RDP
  • .reg
  • .rels
  • .res
  • .rgs
  • .rle
  • .rll
  • .rmi
  • .rpc
  • .rqy
  • .rsp
  • .rtf
  • .rul
  • .rwz
  • .s
  • .sbr
  • .sc2
  • .scc
  • .scd
  • .scf
  • .sch
  • .scp
  • .scr
  • .sct
  • .sdl
  • .sed
  • .shtm
  • .shtml
  • .sit
  • .sldm
  • .sldx
  • .slk
  • .snd
  • .sol
  • .sor
  • .spc
  • .sql
  • .srf
  • .sr_
  • .sst
  • .stl
  • .stm
  • .swf
  • .sym
  • .sys
  • .sy_
  • .tab
  • .tar
  • .tdl
  • .text
  • .tgz
  • .theme
  • .thmx
  • .tif
  • .tiff
  • .tlb
  • .tlh
  • .tli
  • .trg
  • .tsp
  • .tsv
  • .ttc
  • .ttf
  • .txt
  • .udf
  • .UDL
  • .udt
  • .URL
  • .user
  • .usr
  • .uxdc
  • .vb
  • .VBE
  • .vbproj
  • .vbs
  • .vbx
  • .vcf
  • .vcg
  • .vcproj
  • .vcs
  • .vdx
  • .viw
  • .vsd
  • .vspscc
  • .vss
  • .vsscc
  • .vssscc
  • .vst
  • .vsx
  • .vtx
  • .vxd
  • .wab
  • .wav
  • .wax
  • .wbcat
  • .wbk
  • .wcx
  • .wdp
  • .webp
  • .webpnp
  • .wiz
  • .wll
  • .wlt
  • .wm
  • .wma
  • .wmf
  • .wmp
  • .wmv
  • .wmx
  • .wmz
  • .wpl
  • .wps
  • .wpt
  • .wri
  • .wsc
  • .wsdl
  • .WSF
  • .WSH
  • .wsz
  • .wtf
  • .wtx
  • .wvx
  • .x
  • .xaml
  • .xbap
  • .xdp
  • .xdr
  • .xfdf
  • .xht
  • .xhtml
  • .xix
  • .xla
  • .xlam
  • .xlb
  • .xlc
  • .xlk
  • .xll
  • .xlm
  • .xls
  • .xlsb
  • .xlsm
  • .xlsx
  • .xlt
  • .xltm
  • .xltx
  • .xlw
  • .xlxml
  • .xml
  • .xps
  • .xrm-ms
  • .xsd
  • .xsf
  • .xsl
  • .xslt
  • .xsn
  • .xst
  • .xtp
  • .z
  • .z96
  • .zip

It renames encrypted files using the following names:

  • Lock.{original filename and extension}

  SOLUTION

Minimum Scan Engine: 9.800
FIRST VSAPI PATTERN FILE: 12.608.05
FIRST VSAPI PATTERN DATE: 23 Jun 2016
VSAPI OPR PATTERN File: 12.609.00
VSAPI OPR PATTERN Date: 24 Jun 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

Delete this registry value

[ Learn More ]

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\Control Panel\Desktop
    • Wallpaper = "%User Temp%\wl.jpg"

Step 4

Scan your computer with your Trend Micro product to delete files detected as RANSOM_MIRCOP.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 5

Restore encrypted files from backup.


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