RANSOM_MILICRY.A

This ransomware uses a free photo upload service as its C&C server. This way, it is able to mask its C&C routines.

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

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.

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 a copy of itself in the following folders using different file names:

• %User Temp%\{random filename}.exe

(Note: %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.)

It creates the following folders:

• %Desktop%\old_shortcut-Transfers here all the files/folders/shortcuts currently in your desktop that haven't been encrypted.

(Note: %Desktop% is the desktop folder, where it usually is C:\Documents and Settings\{user name}\Desktop in Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\Desktop in 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 keys:

HKEY_CURRENT_USER\Software\{random filename}

HKLM\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Tracing\
CtlGuid

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Tracing\
ServiceCtlGuid

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Tracing\
WLanDiagCtlGuid

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Tracing\
DiagL2SecCtlGuid

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Tracing\
WDiagCoreCtlGuid

It adds the following registry entries:

HKEY_CURRENT_USER\Software\{random filename}
{random file name 1} = "{hex values}"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Tracing\
CtlGuid
Guid = "{GUID}"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Tracing\
ServiceCtlGuid
Guid = "{GUID}"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Tracing\
ServiceCtlGuid
BitNames = "DOT11_AUTOCONF DOT11_AUTOCONF_CLIENT DOT11_AUTOCONF_UI DOT11_FATMSM DOT11_COMMON DOT11_WLANGPA DOT11_CLASS_COINSTALLER"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Tracing\
WLanDiagCtlGuid
Guid = "{GUID}"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Tracing\
WLanDiagCtlGuid
BitNames = "WLANHC_AUTOCONFIG WLANHC_RNWFMSM WLANHC_FATMSM WLANHC_DLLMAIN WLANHC_TEST"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Tracing\
DiagL2SecCtlGuid
Guid = "{GUID}"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Tracing\
DiagL2SecCtlGuid
BitNames = "SECHC_LOG_FLAG_ASSERT SECHC_LOG_FLAG_INIT SECHC_LOG_FLAG_DIAG SECHC_LOG_FLAG_ONEX_DIAG SECHC_LOG_FLAG_REPAIR SECHC_LOG_FLAG_STATE SECHC_LOG_FLAG_EXT SECHC_LOG_FLAG_EVENT_LOG SECHC_LOG_FLAG_FUNCTION SECHC_LOG_FLAG_MEMORY SECHC_LOG_FLAG_LOCKS"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Tracing\
WDiagCoreCtlGuid
Guid = "{GUID}"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Tracing\
WDiagCoreCtlGuid
BitNames = "WD_LOG_FLAG_INIT WD_LOG_FLAG_RPC WD_LOG_FLAG_EVENT WD_LOG_FLAG_INTERFACE WD_LOG_FLAG_CONNECTION WD_LOG_FLAG_CONTROL WD_LOG_FLAG_LOCKS WD_LOG_FLAG_MEMORY WD_LOG_FLAG_REFERENCES WD_LOG_FLAG_FUNCTION_TRACE WD_LOG_FLAG_ASSERT"

It modifies the following registry entries:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings\
ZoneMap
ProxyBypass= = "1"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings\
ZoneMap
IntranetName = "1"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings\
ZoneMap
UNCAsIntranet = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Tracing
LogSessionName = "stdout"

Dropping Routine

This Trojan drops the following files:

• %User Startup%\{random file name 1}.lnk-links to the dropped malware copy
• %User Startup%\{random file name 2}.lnk-links to the ransomnote
• %User Temp%\{random file name 3}.html-serves as ransomnote
• C:\0.tmp
• C:\1.tmp
• D:\2.tmp
• D:\3.tmp

(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 Details

This Trojan encrypts files with the following extensions:

• .dat
• .mx0
• .cd
• .pdb
• .xqx
• .old
• .cnt
• .rtp
• .qss
• .qst
• .fx0
• .fx1
• .ipg
• .ert
• .pic
• .img
• .cur
• .fxr
• .slk
• .m4u
• .mpe
• .mov
• .wmv
• .mpg
• .vob
• .mpeg
• .3g2
• .m4v
• .avi
• .mp4
• .flv
• .mkv
• .3gp
• .asf
• .m3u
• .m3u8
• .wav
• .mp3
• .m4a
• .m
• .rm
• .flac
• .mp2
• .mpa
• .aac
• .wma
• .djv
• .pdf
• .djvu
• .jpeg
• .jpg
• .bmp
• .png
• .jp2
• .lz
• .rz
• .zipx
• .gz
• .bz2
• .s7z
• .tar
• .7z
• .tgz
• .rar
• .zip
• .arc
• .paq
• .bak
• .set
• .back
• .std
• .vmx
• .vmdk
• .vdi
• .qcow
• .ini
• .accd
• .db
• .sqli
• .sdf
• .mdf
• .myd
• .frm
• .odb
• .myi
• .dbf
• .indb
• .mdb
• .ibd
• .sql
• .cgn
• .dcr
• .fpx
• .pcx
• .rif
• .tga
• .wpg
• .wi
• .wmf
• .tif
• .xcf
• .tiff
• .xpm
• .nef
• .orf
• .ra
• .bay
• .pcd
• .dng
• .ptx
• .r3d
• .raf
• .rw2
• .rwl
• .kdc
• .yuv
• .sr2
• .srf
• .dip
• .x3f
• .mef
• .raw
• .log
• .odg
• .uop
• .potx
• .potm
• .pptx
• .rss
• .pptm
• .aaf
• .xla
• .sxd
• .pot
• .eps
• .as3
• .pns
• .wpd
• .wps
• .msg
• .pps
• .xlam
• .xll
• .ost
• .sti
• .sxi
• .otp
• .odp
• .wks
• .vcf
• .xltx
• .xltm
• .xlsx
• .xlsm
• .xlsb
• .cntk
• .xlw
• .xlt
• .xlm
• .xlc
• .dif
• .sxc
• .vsd
• .ots
• .prn
• .ods
• .hwp
• .dotm
• .dotx
• .docm
• .docx
• .dot
• .cal
• .shw
• .sldm
• .txt
• .csv
• .mac
• .met
• .wk3
• .wk4
• .uot
• .rtf
• .sldx
• .xls
• .ppt
• .stw
• .sxw
• .dtd
• .eml
• .ott
• .odt
• .doc
• .odm
• .ppsm
• .xlr
• .odc
• .xlk
• .ppsx
• .obi
• .ppam
• .text
• .docb
• .wb2
• .mda
• .wk1
• .sxm
• .otg
• .oab
• .cmd
• .bat
• .h
• .asx
• .lua
• .pl
• .as
• .hpp
• .clas
• .js
• .fla
• .py
• .rb
• .jsp
• .cs
• .c
• .jar
• .java
• .asp
• .vb
• .vbs
• .asm
• .pas
• .cpp
• .xml
• .php
• .plb
• .asc
• .lay6
• .pp4
• .pp5
• .ppf
• .pat
• .sct
• .ms11
• .lay
• .iff
• .ldf
• .tbk
• .swf
• .brd
• .css
• .dxf
• .dds
• .efx
• .sch
• .dch
• .ses
• .mml
• .fon
• .gif
• .psd
• .html
• .ico
• .ipe
• .dwg
• .jng
• .cdr
• .aep
• .aepx
• .123
• .prel
• .prpr
• .aet
• .fim
• .pfb
• .ppj
• .indd
• .mhtm
• .cmx
• .cpt
• .csl
• .indl
• .dsf
• .ds4
• .drw
• .indt
• .pdd
• .per
• .lcd
• .pct
• .prf
• .pst
• .inx
• .plt
• .idml
• .pmd
• .psp
• .ttf
• .3dm
• .ai
• .3ds
• .ps
• .cpx
• .str
• .cgm
• .clk
• .cdx
• .xhtm
• .cdt
• .fmv
• .aes
• .gem
• .max
• .svg
• .mid
• .iif
• .nd
• .2017
• .tt20
• .qsm
• .2015
• .2014
• .2013
• .aif
• .qbw
• .qbb
• .qbm
• .ptb
• .qbi
• .qbr
• .2012
• .des
• .v30
• .qbo
• .stc
• .lgb
• .qwc
• .qbp
• .qba
• .tlg
• .qbx
• .qby
• .1pa
• .ach
• .qpd
• .gdb
• .tax
• .qif
• .t14
• .qdf
• .ofx
• .qfx
• .t13
• .ebc
• .ebq
• .2016
• .tax2
• .mye
• .myox
• .ets
• .tt14
• .epb
• .500
• .txf
• .t15
• .t11
• .gpc
• .qtx
• .itf
• .tt13
• .t10
• .qsd
• .iban
• .ofc
• .bc9
• .mny
• .13t
• .qxf
• .amj
• .m14
• ._vc
• .tbp
• .qbk
• .aci
• .npc
• .qbmb
• .sba
• .cfp
• .nv2
• .tfx
• .n43
• .let
• .tt12
• .210
• .dac
• .slp
• .qb20
• .saj
• .zdb
• .tt15
• .ssg
• .t09
• .epa
• .qch
• .pd6
• .rdy
• .sic
• .ta1
• .lmr
• .pr5
• .op
• .sdy
• .brw
• .vnd
• .esv
• .kd3
• .vmb
• .qph
• .t08
• .qel
• .m12
• .pvc
• .q43
• .etq
• .u12
• .hsr
• .ati
• .t00
• .mmw
• .bd2
• .ac2
• .qpb
• .tt11
• .zix
• .ec8
• .nv
• .lid
• .qmtf
• .hif
• .lld
• .quic
• .mbsb
• .nl2
• .qml
• .wac
• .cf8
• .vbpf
• .m10
• .qix
• .t04
• .qpg
• .quo
• .ptdb
• .gto
• .pr0
• .vdf
• .q01
• .fcr
• .gnc
• .ldc
• .t05
• .t06
• .tom
• .tt10
• .qb1
• .t01
• .rpf
• .t02
• .tax1
• .1pe
• .skg
• .pls
• .t03
• .xaa
• .dgc
• .mnp
• .qdt
• .mn8
• .ptk
• .t07
• .chg
• .#vc
• .qfi
• .acc
• .m11
• .kb7
• .q09
• .esk
• .09i
• .cpw
• .sbf
• .mql
• .dxi
• .kmo
• .md
• .u11
• .oet
• .ta8
• .efs
• .h12
• .mne
• .ebd
• .fef
• .qpi
• .mn5
• .exp
• .m16
• .09t
• .00c
• .qmt
• .cfdi
• .u10
• .s12
• .qme
• .int?
• .cf9
• .ta5
• .u08
• .mmb
• .qnx
• .q07
• .tb2
• .say
• .ab4
• .pma
• .defx
• .tkr
• .q06
• .tpl
• .ta2
• .qob
• .m15
• .fca
• .eqb
• .q00
• .mn4
• .lhr
• .t99
• .mn9
• .qem
• .scd
• .mwi
• .mrq
• .q98
• .i2b
• .mn6
• .q08
• .kmy
• .bk2
• .stm
• .mn1
• .bc8
• .pfd
• .bgt
• .hts
• .tax0
• .cb
• .resx
• .mn7
• .08i
• .mn3
• .ch
• .meta
• .07i
• .rcs
• .dtl
• .ta9
• .mem
• .seam
• .btif
• .11t
• .efsl
• .$ac
• .emp
• .imp
• .fxw
• .sbc
• .bpw
• .mlb
• .10t
• .fa1
• .saf
• .trm
• .fa2
• .pr2
• .xeq
• .sbd
• .fcpa
• .ta6
• .tdr
• .acm
• .lin
• .dsb
• .vyp
• .emd
• .pr1
• .mn2
• .bpf
• .mws
• .h11
• .pr3
• .gsb
• .mlc
• .nni
• .cus
• .ldr
• .ta4
• .inv
• .omf
• .reb
• .qdfx
• .pg
• .coa
• .rec
• .rda
• .ffd
• .ml2
• .ddd
• .ess
• .qbmd
• .afm
• .d07
• .vyr
• .acr
• .dtau
• .ml9
• .bd3
• .pcif
• .cat
• .h10
• .ent
• .fyc
• .p08
• .jsd
• .zka
• .hbk
• .mone
• .pr4
• .qw5
• .cdf
• .gfi
• .cht
• .por
• .qbz
• .ens
• .3pe
• .pxa
• .intu
• .trn
• .3me
• .07g
• .jsda
• .2011
• .fcpr
• .qwmo
• .t12
• .pfx
• .p7b
• .der
• .nap
• .p12
• .p7c
• .crt
• .csr
• .pem
• .gpg
• .key

It renames encrypted files using the following names:

• {filename of encrypted files}.cry

It does the following:

• Deletes shadow volume:
  • "%System%\vssadmin.exe" delete shadows /all /quiet
• Sends the following data to the server :
  • System information
  • Files encrypted
• It sends the gathered data to the following URL:
  • http://{BLOCKED}r.com/a/RkI0O
• It sends the gathered data to the following URL if it fails to connect to the first URL:
  • http://{BLOCKED}in.org/submit
• It will not encrypt if the system's language is any of the following:
  • Kazak
  • Russian
  • Ukrainian
  • Uzbek
  • Sakha
  • Belarusian

NOTES:

This ransomware drops the following ransomnote:

It displays the following in the given personal homepage:

In the Payment tab, it displays the following for ransom Payment procedure:

In the Test Decryption tab, it displays the following:

In the Instructions tab, it displays the following for decryption instructions:

And in the Support tab, it displays the following: