RANSOM_CRYPAURA.RVGA

 Analysis by: Julie Anne Cabuhat

 ALIASES:

Ransom.Revenge (Malwarebytes), Trojan:Win32/Malex (Microsoft),

 PLATFORM:

Windows

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

  • Threat Type: Ransomware

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

Infection Channel:

Dropped by other malware, Downloaded from the Internet

This Ransomware 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:

113,152 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

15 Mar 2017

Payload:

Connects to URLs/IPs, Encrypts files

Arrival Details

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

  • %ProgramData%\Microsofts\Windows NT\svchost.exe

(Note: %ProgramData% is the Program Data folder, where it usually is C:\Program Files in Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\ProgramData 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.)

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

  • {16 Character ID}_Windows_Defender

Autostart Technique

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

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
MS Common User Interface = "%ProgramData%\Microsofts\Windows NT\svchost.exe"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\RunOnce
*MS Common User Interface = "%ProgramData%\Microsofts\Windows NT\svchost.exe"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
MS Common User Interface Updater = "{malware path}\{malware filename}.exe"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\RunOnce
*MS Common User Interface Updater = "{malware path}\{malware filename}.exe"

Process Termination

This Ransomware terminates the following processes if found running in the affected system's memory:

  • These are database related programs:
    • msftesql.exe
    • sqlagent.exe
    • sqlbrowser.exe
    • sqlservr.exe
    • sqlwriter.exe
    • oracle.exe
    • ocssd.exe
    • dbsnmp.exe
    • synctime.exe
    • mydesktopqos.exe
    • agntsvc.exe
    • isqlplussvc.exe
    • xfssvccon.exe
    • mydesktopservice.exe
    • ocautoupds.exe
    • agntsvc.exe
    • agntsvc.exe
    • agntsvc.exe
    • encsvc.exe
    • firefoxconfig.exe
    • tbirdconfig.exe
    • ocomm.exe
    • mysqld.exe
    • mysqld-nt.exe
    • mysqld-opt.exe
    • dbeng50.exe
    • sqbcoreservice.exe

Dropping Routine

This Ransomware drops the following files:

  • {folder of encrypted files}\# !!!HELP_FILE!!! #.TXT - Ransom Note
  • %Application Data%\Microsoft\MSDN\windowsidx.prftmp

(Note: %Application Data% is the Application Data folder, where it usually is C:\Documents and Settings\{user name}\Application Data on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Roaming 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.)

Download Routine

This Ransomware accesses the following websites to download files:

  • http://{BLOCKED}.{BLOCKED}.87.201/js/other_scripts/get.php

Other Details

This Ransomware 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
  • .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
  • .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
  • .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
  • .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
  • .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
  • .AFS
  • .GPG
  • .AES
  • .ARC
  • .PAQ
  • .TAR
  • .BZ2
  • .TGZ
  • .DJV
  • .CMD
  • .BAT
  • .BRD
  • .SCH
  • .DCH
  • .DIP
  • .VBS
  • .MYI
  • .FRM
  • .ASC
  • .LAY6
  • .LAY
  • .MSLL
  • .DOCB
  • .MML
  • .UOP
  • .WKS
  • .SLK
  • .XLC
  • .DIF
  • .HWP
  • .UOT
  • .PEM
  • .CSR

It renames encrypted files using the following names:

  • {16 Character ID}{Random 16 Characters}.REVENGE

It does the following:

  • It deletes shadow copies using the following commands:
    • /C vssadmin Delete Shadows /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 {default} bootstatuspolicy ignoreallfailures

NOTES:

This ransomware displays the following ransom note:

  SOLUTION

Minimum Scan Engine:

9.850

FIRST VSAPI PATTERN FILE:

13.284.02

FIRST VSAPI PATTERN DATE:

18 Mar 2017

VSAPI OPR PATTERN File:

13.285.00

VSAPI OPR PATTERN Date:

19 Mar 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 value
    • MS Common User Interface = "%ProgramData%\Microsofts\Windows NT\svchost.exe"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\RunOnce value
    • *MS Common User Interface = "%ProgramData%\Microsofts\Windows NT\svchost.exe"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run value
    • MS Common User Interface Updater = "{malware path}\{malware filename}.exe"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\RunOnce value
    • *MS Common User Interface 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}\# !!!HELP_FILE!!! #.TXT
  • %Application Data%\Microsoft\MSDN\windowsidx.prftmp

Step 6

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