RANSOM_CRYPAURA.SHLD

 Analysis by: Julie Anne Cabuhat

 ALIASES:

Trojan.Ransom.CryptoShield (ALYac), Ransom.CryptoShield (Malwarebytes), Ransom:Win32/Shieldcrypt.A (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:

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.

However, as of this writing, the said sites are inaccessible.

  TECHNICAL DETAILS

File Size:

104,960 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

14 Feb 2017

Payload:

Connects to URLs/IPs, Displays message/message boxes, 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.

Installation

This Trojan drops the following copies of itself into the affected system:

  • %Program Data%\MicroSoftTMP\system32\winlogon.exe

It adds the following mutexes to ensure that only one of its copies runs at any one time:

  • DBWinMutex

Autostart Technique

This Trojan adds the following registry entries to enable its automatic execution at every system startup:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
Defender Window = "%Program Data%\MicroSoftTMP\system32\winlogon.exe"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\RunOnce
*Defender Window = "%Program Data%\MicroSoftTMP\system32\winlogon.exe"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
Defender Window Updater = "{malware path}\{malware filename}.exe"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\RunOnce
*Defender Window Updater = "{malware path}\{malware filename}.exe"

Dropping Routine

This Trojan drops the following files:

  • {folder of encrypted files}\# RESTORING FILES #.HTML
  • {folder of encrypted files}\# RESTORING FILES #.TXT

Other Details

This Trojan connects to the following possibly malicious URL:

  • http://{BLOCKED}.{BLOCKED}.62.136/js/prettyPhoto/images/prettyPhoto/default/infromation.php

It encrypts files with the following extensions:

  • .3G2
  • .3GP
  • .7Z
  • .AB4
  • .ACH
  • .ADB
  • .ADS
  • .AIT
  • .AL
  • .APJ
  • .ASF
  • .ASM
  • .ASP
  • .ASX
  • .BACK
  • .BANK
  • .BGT
  • .BIK
  • .BKF
  • .BKP
  • .BPW
  • .C
  • .CDF
  • .CDR
  • .CDX
  • .CE1
  • .CE2
  • .ODF
  • .ODG
  • .ODP
  • .ODS
  • .OIL
  • .ONE
  • .OTH
  • .OTP
  • .OTS
  • .P12
  • .P7B
  • .P7C
  • .PAS
  • .PAT
  • .PBO
  • .PCT
  • .PEM
  • .PHP
  • .PIP
  • .PLC
  • .POT
  • .POTM
  • .POTX
  • .PPAM
  • .PPS
  • .PPSM
  • .PPSX
  • .PRF
  • .PSAFE3
  • .PSPIMAGE
  • .PUB
  • .PUZ
  • .PY
  • .QBA
  • .QBW
  • .R3D
  • .RAF
  • .RAR
  • .RAT
  • .RM
  • .RWZ
  • .SAS7BDAT
  • .SAY
  • .SD0
  • .SDA
  • .SNP
  • .SRF
  • .SRT
  • .ST4
  • .ST5
  • .ST6
  • .ST7
  • .ST8
  • .STC
  • .STD
  • .STI
  • .STX
  • .SXC
  • .SXI
  • .SXM
  • .VOB
  • .VSX
  • .VTX
  • .WAV
  • .WB2
  • .WLL
  • .WMV
  • .WPD
  • .X11
  • .XLA
  • .XLAM
  • .XLB
  • .XLC
  • .XLL
  • .XLM
  • .XLR
  • .XLSB
  • .XLT
  • .XLTM
  • .XLTX
  • .M4A
  • .WMA
  • .D3DBSP
  • .XLW
  • .XPP
  • .XSN
  • .YUV
  • .ZIP
  • .SIE
  • .UNREC
  • .SCAN
  • .SUM
  • .T13
  • .T12
  • .QDF
  • .TAX
  • .PKPASS
  • .BC6
  • .BC7
  • .SIDN
  • .SIDD
  • .MDDATA
  • .ITL
  • .ICXS
  • .HVPL
  • .HPLG
  • .HKDB
  • .MDBACKUP
  • .SYNCDB
  • .GHO
  • .CAS
  • .WMO
  • .ITM
  • .SB
  • .FOS
  • .MOV
  • .VDF
  • .ZTMP
  • .SIS
  • .SID
  • .NCF
  • .MENU
  • .LAYOUT
  • .DMP
  • .BLOB
  • .ESM
  • .VCF
  • .VTF
  • .DAZIP
  • .FPK
  • .MLX
  • .KF
  • .IWD
  • .VPK
  • .TOR
  • .PSK
  • .RIM
  • .W3X
  • .FSH
  • .NTL
  • .ARCH00
  • .LVL
  • .SNX
  • .CFR
  • .FF
  • .VPP_PC
  • .LRF
  • .M2
  • .MCMETA
  • .VFS0
  • .MPQGE
  • .DB0
  • .DBA
  • .ROFL
  • .HKX
  • .BAR
  • .UPK
  • .DAS
  • .LITEMOD
  • .ASSET
  • .FORGE
  • .BSA
  • .APK
  • .RE4
  • .LBF
  • .SLM
  • .EPK
  • .RGSS3A
  • .PAK
  • .BIG
  • .WALLET
  • .WOTREPLAY
  • .XXX
  • .DESC
  • .M3U
  • .JS
  • .RB
  • .1CD
  • .DBF
  • .DT
  • .CF
  • .CFU
  • .MXL
  • .EPF
  • .KDBX
  • .VRP
  • .GRS
  • .GEO
  • .ST
  • .PFF
  • .MFT
  • .EFD
  • .3DM
  • .3DS
  • .RIB
  • .MA
  • .SLDASM
  • .SLDPRT
  • .MAX
  • .BLEND
  • .LWO
  • .LWS
  • .M3D
  • .MB
  • .OBJ
  • .X
  • .X3D
  • .MOVIE
  • .BYU
  • .C4D
  • .FBX
  • .DGN
  • .DWG
  • .4DB
  • .4DL
  • .4MP
  • .ABS
  • .ACCDB
  • .ACCDC
  • .ACCDE
  • .ACCDR
  • .ACCDT
  • .ACCDW
  • .ACCFT
  • .ADN
  • .A3D
  • .ADP
  • .AFT
  • .AHD
  • .ALF
  • .ASK
  • .AWDB
  • .AZZ
  • .BDB
  • .BND
  • .BOK
  • .THUMB
  • .TJP
  • .TM2
  • .TN
  • .TPI
  • .UFO
  • .UGA
  • .USERTILE-MS
  • .VDA
  • .VFF
  • .VPE
  • .VST
  • .WB1
  • .WBC
  • .WBD
  • .WBM
  • .WBMP
  • .WBZ
  • .WDP
  • .WEBP
  • .WPB
  • .WPE
  • .WVL
  • .X3F
  • .Y
  • .YSP
  • .ZIF
  • .CDR4
  • .CDR6
  • .CDRW
  • .JPEG
  • .DJVU
  • .PDF
  • .DDOC
  • .CSS
  • .PPTM
  • .RAW
  • .CPT
  • .JPG
  • .JPE
  • .JP2
  • .PCX
  • .PDN
  • .PNG
  • .PSD
  • .TGA
  • .TIFF
  • .TIF
  • .HDP
  • .XPM
  • .AI
  • .PS
  • .WMF
  • .EMF
  • .ANI
  • .APNG
  • .FLC
  • .FB2
  • .FB3
  • .FLI
  • .MNG
  • .SMIL
  • .SVG
  • .MOBI
  • .SWF
  • .HTML
  • .XLS
  • .XLSX
  • .XLSM
  • .XHTM
  • .MRWREF
  • .XF
  • .PST
  • .BD
  • .TAR
  • .GZ
  • .MKV
  • .XML
  • .XMLX
  • .DAT
  • .MCL
  • .MTE
  • .CFG
  • .MP3
  • .BTR
  • .BAK
  • .BACKUP
  • .CDB
  • .CKP
  • .CLKW
  • .CMA
  • .DACONNECTIONS
  • .DACPAC
  • .DAD
  • .DADIAGRAMS
  • .DAF
  • .DASCHEMA
  • .DB
  • .DB-SHM
  • .DB-WAL
  • .DB2
  • .DB3
  • .DBC
  • .DBK
  • .DBS
  • .DBT
  • .DBV
  • .DBX
  • .DCB
  • .DCT
  • .DCX
  • .DDL
  • .DF1
  • .DMO
  • .DNC
  • .DP1
  • .DQY
  • .DSK
  • .DSN
  • .DTA
  • .DTSX
  • .DXL
  • .ECO
  • .ECX
  • .EDB
  • .EMD
  • .EQL
  • .FCD
  • .FDB
  • .FIC
  • .FID
  • .FM5
  • .FMP
  • .FMP12
  • .FMPSL
  • .FOL
  • .FP3
  • .FP4
  • .FP5
  • .FP7
  • .FPT
  • .FZB
  • .FZV
  • .GDB
  • .GWI
  • .HDB
  • .HIS
  • .IB
  • .IDC
  • .IHX
  • .ITDB
  • .ITW
  • .JTX
  • .KDB
  • .LGC
  • .MAQ
  • .MDB
  • .MDBHTML
  • .MDF
  • .MDN
  • .MDT
  • .MRG
  • .MUD
  • .MWB
  • .S3M
  • .MYD
  • .NDF
  • .NS2
  • .NS3
  • .NS4
  • .NSF
  • .NV2
  • .NYF
  • .OCE
  • .ODB
  • .OQY
  • .ORA
  • .ORX
  • .OWC
  • .OWG
  • .OYX
  • .P96
  • .P97
  • .PAN
  • .PDB
  • .PDM
  • .PHM
  • .PNZ
  • .PTH
  • .PWA
  • .QPX
  • .QRY
  • .QVD
  • .RCTD
  • .RDB
  • .RPD
  • .CER
  • .CFP
  • .CLASS
  • .CLS
  • .CMT
  • .CPI
  • .CPP
  • .CRAW
  • .CRT
  • .CRW
  • .CS
  • .CSH
  • .CSL
  • .CSV
  • .DAC
  • .DBR
  • .DDD
  • .DER
  • .DES
  • .DGC
  • .DNG
  • .DRF
  • .K2P
  • .DTD
  • .DXG
  • .EBD
  • .EML
  • .EXF
  • .FFD
  • .FFF
  • .FH
  • .FHD
  • .FLA
  • .FLAC
  • .FLV
  • .FM
  • .GRAY
  • .GREY
  • .GRW
  • .GRY
  • .H
  • .HPP
  • .IBD
  • .IIF
  • .INDD
  • .JAVA
  • .KEY
  • .LACCDB
  • .LUA
  • .M
  • .M4V
  • .MAF
  • .MAM
  • .MAR
  • .MAW
  • .MDC
  • .MDE
  • .MFW
  • .MMW
  • .MP4
  • .MPG
  • .MPP
  • .MRW
  • .MSO
  • .NDD
  • .NEF
  • .NK2
  • .NSD
  • .NSG
  • .NSH
  • .NWB
  • .NX1
  • .NX2
  • .ODC
  • .RSD
  • .SBF
  • .SDB
  • .SDF
  • .SPQ
  • .SQB
  • .STP
  • .SQL
  • .SQLITE
  • .SQLITE3
  • .SQLITEDB
  • .STR
  • .TCX
  • .TDT
  • .TE
  • .TEACHER
  • .TRM
  • .UDB
  • .USR
  • .V12
  • .VDB
  • .VPD
  • .WDB
  • .WMDB
  • .XDB
  • .XLD
  • .XLGC
  • .ZDB
  • .ZDC
  • .CDR3
  • .PPT
  • .PPTX
  • .1ST
  • .ABW
  • .ACT
  • .AIM
  • .ANS
  • .APT
  • .ASC
  • .ASCII
  • .ASE
  • .ATY
  • .AWP
  • .AWT
  • .AWW
  • .BBS
  • .BDP
  • .BDR
  • .BEAN
  • .BIB
  • .BNA
  • .BOC
  • .BTD
  • .BZABW
  • .CHART
  • .CHORD
  • .CNM
  • .CRD
  • .CRWL
  • .CYI
  • .DCA
  • .DGS
  • .DIZ
  • .DNE
  • .DOC
  • .DOCM
  • .DOCX
  • .DOCXML
  • .DOCZ
  • .DOT
  • .DOTM
  • .DOTX
  • .DSV
  • .DVI
  • .DX
  • .EIO
  • .EIT
  • .EMAIL
  • .EMLX
  • .EPP
  • .ERR
  • .ETF
  • .ETX
  • .EUC
  • .FADEIN
  • .FAQ
  • .FBL
  • .FCF
  • .FDF
  • .FDR
  • .FDS
  • .FDT
  • .FDX
  • .FDXT
  • .FES
  • .FFT
  • .FLR
  • .FODT
  • .FOUNTAIN
  • .GTP
  • .FRT
  • .FWDN
  • .FXC
  • .GDOC
  • .GIO
  • .GPN
  • .GTHR
  • .GV
  • .HBK
  • .HHT
  • .HS
  • .HTC
  • .HWP
  • .HZ
  • .IDX
  • .IIL
  • .IPF
  • .JARVIS
  • .JIS
  • .JOE
  • .JP1
  • .JRTF
  • .KES
  • .KLG
  • .KNT
  • .KON
  • .KWD
  • .LATEX
  • .LBT
  • .LIS
  • .LIT
  • .LNT
  • .LP2
  • .LRC
  • .LST
  • .LTR
  • .LTX
  • .LUE
  • .LUF
  • .LWP
  • .LXFML
  • .LYT
  • .LYX
  • .MAN
  • .MAP
  • .MBOX
  • .MD5TXT
  • .ME
  • .MELL
  • .MIN
  • .MNT
  • .MSG
  • .MWP
  • .NFO
  • .NJX
  • .NOTES
  • .NOW
  • .NWCTXT
  • .NZB
  • .OCR
  • .ODM
  • .ODO
  • .ODT
  • .OFL
  • .OFT
  • .OPENBSD
  • .ORT
  • .OTT
  • .P7S
  • .PAGES
  • .PFS
  • .PFX
  • .PJT
  • .PLANTUML
  • .PRT
  • .PSW
  • .PU
  • .PVJ
  • .PVM
  • .PWI
  • .PWR
  • .QDL
  • .RAD
  • .README
  • .RFT
  • .RIS
  • .RNG
  • .RPT
  • .RST
  • .RT
  • .RTD
  • .RTF
  • .RTX
  • .RUN
  • .RZK
  • .RZN
  • .SAF
  • .SAFETEXT
  • .SAM
  • .SCC
  • .SCM
  • .SCRIV
  • .SCRIVX
  • .SCW
  • .SDM
  • .SDOC
  • .SDW
  • .SGM
  • .SIG
  • .SKCARD
  • .SLA
  • .SLAGZ
  • .SLS
  • .SMF
  • .SMS
  • .SSA
  • .STRINGS
  • .STW
  • .STY
  • .SUB
  • .SXG
  • .SXW
  • .TAB
  • .TDF
  • .TEXT
  • .THP
  • .TLB
  • .TM
  • .TMD
  • .TMV
  • .TMX
  • .TPC
  • .TRELBY
  • .TVJ
  • .TXT
  • .U3D
  • .U3I
  • .UNAUTH
  • .UNX
  • .UOF
  • .UOT
  • .UPD
  • .UTF8
  • .UNITY
  • .UTXT
  • .VCT
  • .VNT
  • .VW
  • .WBK
  • .WCF
  • .WEBDOC
  • .WGZ
  • .WN
  • .WP
  • .WP4
  • .WP5
  • .WP6
  • .WP7
  • .WPA
  • .WPL
  • .WPS
  • .WPT
  • .WPW
  • .WRI
  • .WSC
  • .DXF
  • .EGC
  • .EP
  • .EPS
  • .EPSF
  • .FH10
  • .FH11
  • .FH3
  • .FH4
  • .FH5
  • .FH6
  • .FH7
  • .FH8
  • .FIF
  • .FIG
  • .FMV
  • .FT10
  • .FT11
  • .FT7
  • .FT8
  • .FT9
  • .FTN
  • .FXG
  • .GDRAW
  • .GEM
  • .GLOX
  • .GSD
  • .HPG
  • .HPGL
  • .HPL
  • .IDEA
  • .IGT
  • .IGX
  • .IMD
  • .INK
  • .LMK
  • .MGCB
  • .MGMF
  • .MGMT
  • .MT9
  • .MGMX
  • .MGTX
  • .MMAT
  • .MAT
  • .OTG
  • .OVP
  • .OVR
  • .PCS
  • .PFD
  • .PFV
  • .PL
  • .PLT
  • .VRML
  • .POBJ
  • .PSID
  • .RDL
  • .SCV
  • .SK1
  • .SK2
  • .SLDDRT
  • .SNAGITSTAMPS
  • .SNAGSTYLES
  • .SSK
  • .STN
  • .SVF
  • .SVGZ
  • .SXD
  • .TLC
  • .TNE
  • .UFR
  • .VBR
  • .VEC
  • .VML
  • .VSD
  • .VSDM
  • .VSDX
  • .VSTM
  • .STM
  • .VSTX
  • .WPG
  • .VSM
  • .VAULT
  • .XAR
  • .XMIND
  • .XMMAP
  • .YAL
  • .ORF
  • .OTA
  • .OTI
  • .OZB
  • .OZJ
  • .OZT
  • .PAL
  • .PANO
  • .PAP
  • .PBM
  • .PC1
  • .PC2
  • .PC3
  • .PCD
  • .PDD
  • .PE4
  • .PEF
  • .PFI
  • .PGF
  • .PGM
  • .PI1
  • .PI2
  • .PI3
  • .PIC
  • .PICT
  • .PIX
  • .PJPEG
  • .PJPG
  • .PM
  • .PMG
  • .PNI
  • .PNM
  • .PNTG
  • .POP
  • .PP4
  • .PP5
  • .PPM
  • .PRW
  • .PSDX
  • .PSE
  • .PSP
  • .PSPBRUSH
  • .PTG
  • .PTX
  • .PVR
  • .PX
  • .PXR
  • .PZ3
  • .PZA
  • .PZP
  • .PZS
  • .Z3D
  • .QMG
  • .RAS
  • .RCU
  • .RGB
  • .RGF
  • .RIC
  • .RIFF
  • .RIX
  • .RLE
  • .RLI
  • .RPF
  • .RRI
  • .RS
  • .RSB
  • .RSR
  • .RW2
  • .RWL
  • .S2MV
  • .SAI
  • .SCI
  • .SCT
  • .SEP
  • .SFC
  • .SFERA
  • .SFW
  • .SKM
  • .SLD
  • .SOB
  • .SPA
  • .SPE
  • .SPH
  • .SPJ
  • .SPP
  • .SR2
  • .SRW
  • .STE
  • .SUMO
  • .SVA
  • .SAVE
  • .SSFN
  • .T2B
  • .TB0
  • .TBN
  • .TEX
  • .TFC
  • .TG4
  • .THM
  • .QBI
  • .QBR
  • .CNT
  • .V30
  • .QBO
  • .LGB
  • .QWC
  • .QBP
  • .AIF
  • .QBY
  • .1PA
  • .QPD
  • .SET
  • .ND
  • .RTP
  • .QBWIN
  • .LOG
  • .QBBACKUP
  • .TMP
  • .TEMP1234
  • .QBT
  • .QBSDK
  • .SYNCMANAGERLOGGER
  • .ECML
  • .QSM
  • .QSS
  • .QST
  • .FX0
  • .FX1
  • .MX0
  • .FPX
  • .FXR
  • .FIM
  • .BETTER_CALL_SAUL
  • .BREAKINGBAD
  • .HEISENBERG
  • .YTBL
  • .WSD
  • .WSH
  • .WTX
  • .XBDOC
  • .XBPLATE
  • .XDL
  • .XLF
  • .XPS
  • .XWP
  • .XY3
  • .XYP
  • .XYW
  • .YBK
  • .YML
  • .ZABW
  • .ZW
  • .2BP
  • .0
  • .36
  • .3FR
  • .411
  • .73I
  • .8XI
  • .9PNG
  • .ABM
  • .AFX
  • .AGIF
  • .AGP
  • .AIC
  • .ALBM
  • .APD
  • .APM
  • .APS
  • .APX
  • .ARTWORK
  • .ARW
  • .ASW
  • .AVATAR
  • .BAY
  • .BLKRT
  • .BM2
  • .BMP
  • .BMX
  • .BMZ
  • .BRK
  • .BRN
  • .BRT
  • .BSS
  • .BTI
  • .C4
  • .CAL
  • .CALS
  • .CAN
  • .CD5
  • .CDC
  • .CDG
  • .CIMG
  • .CIN
  • .CIT
  • .COLZ
  • .CPC
  • .CPD
  • .CPG
  • .CPS
  • .CPX
  • .CR2
  • .CT
  • .DC2
  • .DCR
  • .DDS
  • .DGT
  • .DIB
  • .DJV
  • .DM3
  • .DMI
  • .VUE
  • .DPX
  • .WIRE
  • .DRZ
  • .DT2
  • .DTW
  • .DVL
  • .ECW
  • .EIP
  • .ERF
  • .EXR
  • .FAL
  • .FAX
  • .FIL
  • .FPOS
  • .G3
  • .GCDP
  • .GFB
  • .GFIE
  • .GGR
  • .GIF
  • .GIH
  • .GIM
  • .GMBCK
  • .GMSPR
  • .SPR
  • .SCAD
  • .GPD
  • .GRO
  • .GROB
  • .HDR
  • .HPI
  • .I3D
  • .ICN
  • .ICPR
  • .IIQ
  • .INFO
  • .INT
  • .IPX
  • .ITC2
  • .IWI
  • .J
  • .J2C
  • .J2K
  • .JAS
  • .JB2
  • .JBIG
  • .JBIG2
  • .JBMP
  • .JBR
  • .JFIF
  • .JIA
  • .JNG
  • .JPG2
  • .JPS
  • .JPX
  • .JTF
  • .JWL
  • .JXR
  • .KDC
  • .KDI
  • .KDK
  • .KIC
  • .KPG
  • .LBM
  • .LJP
  • .MAC
  • .MBM
  • .MEF
  • .MNR
  • .MOS
  • .MPF
  • .MPO
  • .MRXS
  • .MYL
  • .NCR
  • .NCT
  • .NLM
  • .NRW
  • .OC3
  • .WALLET
  • .OC4
  • .OC5
  • .OCI
  • .OMF
  • .OPLC
  • .AF2
  • .AF3
  • .AI
  • .ART
  • .ASY
  • .CDMM
  • .CDMT
  • .CDMTZ
  • .CDMZ
  • .CDT
  • .CGM
  • .CMX
  • .CNV
  • .CSY
  • .CV5
  • .CVG
  • .CVI
  • .CVS
  • .CVX
  • .CWT
  • .CXF
  • .DCS
  • .DED
  • .DESIGN
  • .DHS
  • .DPP
  • .DRW
  • .DXB

It renames encrypted files using the following names:

  • {random characters}.{random characters}.[RES_SUP@INDIA.COM].ID[{ID number}].CRYPTOSHIELD

It does the following:

  • It deletes shadow copies using the following commands:
    • /C vssadmin Delete Shadows /All /Quiet
    • /C vssadmin Delete Shadows /For={Drive Letter Z-A} /All /Quiet
  • It disables Volume Shadow Service using the following command:
    • net stop vss
  • It disables Startup Repair from running using the following command:
    • /bcedit /set {default} recoveryenabled No
  • It disables or turns off Windows Error Recovery Screen on Startup using the following command:
    • /bcdedit /set bootstatuspolicy ignoreallfailures

However, as of this writing, the said sites are inaccessible.

NOTES:

The ransomware displays the ransom note in the browser after encryption:

It also displays the ransom note in a text editor after encryption:

  SOLUTION

Minimum Scan Engine:

9.850

FIRST VSAPI PATTERN FILE:

13.220.04

FIRST VSAPI PATTERN DATE:

14 Feb 2017

VSAPI OPR PATTERN File:

13.221.00

VSAPI OPR PATTERN Date:

15 Feb 2017

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

[ Learn More ]

Step 4

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\Software\Microsoft\Windows\CurrentVersion\Run
    • Defender Window = "%Program Data%\MicroSoftTMP\system32\winlogon.exe"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\RunOnce
    • *Defender Window = "%Program Data%\MicroSoftTMP\system32\winlogon.exe"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
    • Defender Window Updater = "{malware path}\{malware filename}.exe"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\RunOnce
    • *Defender Window Updater = "{malware path}\{malware filename}.exe"

Step 5

Search and delete this file

[ Learn More ]
There may be some files that are hidden. Please make sure you check the Search Hidden Files and Folders checkbox in the "More advanced options" option to include all hidden files and folders in the search result.
  • {folder of encrypted files}\# RESTORING FILES #.HTML
  • {folder of encrypted files}\# RESTORING FILES #.TXT

Step 6

Restart in normal mode and scan your computer with your Trend Micro product for files detected as RANSOM_CRYPAURA.SHLD. 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 7

Restore encrypted files from backup.

NOTES:

Enable services disabled using the command prompt.

Run cmd.exe as administrator.

To enable Volume Shadow Service use the following command: net start vss

To enable Windows Error Recovery Screen on Startup use the following command: bcdedit /set {default} bootstatuspolicy displayallfailures

To enable Startup Repair use the following command: /bcedit /set {default} recoveryenabled Yes


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