RANSOM_HIDDENTEARRESU.A
Ransom:MSIL/Ryzerlo.A (Microsoft); Trojan-Ransom.HiddenTear (Ikarus)
Windows
Threat Type: Ransomware
Destructiveness: No
Encrypted: No
In the wild: Yes
OVERVIEW
Downloaded from the Internet, Dropped by other malware
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.
It connects to certain websites to send and receive information. It is capable of encrypting files in the affected system.
It drops files as ransom note.
TECHNICAL DETAILS
228,864 bytes
EXE
No
01 Jun 2017
Displays message/message boxes, 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 the following non-malicious file:
- %Desktop%\Recovery.key -contains: {computerName}-{userName} {15 random characters}
(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 Details
This Ransomware connects to the following website to send and receive information:
- http://{BLOCKED}ection.{BLOCKED}ctme.net/write.php?info={computerName}-{userName} {15 random characters}
It encrypts files with the following extensions:
- .1pa
- .3dm
- .3g2
- .3gp
- .ARC
- .Ai
- .Aif
- .Cal
- .Cdr
- .Cdt
- .Cdx
- .Cgn
- .Clk
- .Cmx
- .Cnt
- .Cpt
- .Cpx
- .Csl
- .Cur
- .Des
- .Drw
- .Ds4
- .Dsf
- .Dwg
- .Eps
- .FPx
- .Fim
- .Fmv
- .Fpx
- .Fx0
- .Fx1
- .Fxr
- .Gem
- .Gif
- .Iif
- .Img
- .Ini
- .Lgb
- .Mac
- .Met
- .Mx0
- .Nap
- .Nd
- .PAQ
- .PP4
- .Pat
- .Pcd
- .Pct
- .Pcx
- .Pfb
- .Pic
- .Plt
- .Pp5
- .Ppf
- .Ppt
- .Prn
- .Ps
- .Psp
- .QBB
- .QBI
- .QBM
- .QBR
- .Qba
- .Qbo
- .Qbp
- .Qbw
- .Qbx
- .Qby
- .Qpd
- .Qsm
- .Qss
- .Qst
- .Qwc
- .Raw
- .Rif
- .Rtp
- .Sct
- .Set
- .Shw
- .Svg
- .Swf
- .Tga
- .Tiff
- .Tlg
- .Ttf
- .Txt
- .Vsd
- .Wav
- .Wi
- .Wmf
- .Wpd
- .Wpg
- .XPM
- .Xcf
- .Xls
- .Xlsm
- .Xlsx
- .aaf
- .accdb
- .aep
- .aepx
- .aes
- .aet
- .ai
- .aif
- .as
- .as3
- .asc
- .asf
- .asm
- .asp
- .asx
- .avi
- .backup
- .bak
- .bat
- .bmp
- .brd
- .c
- .cgm
- .class
- .cmd
- .cpp
- .crt
- .cs
- .csr
- .csv
- .dat
- .db
- .dbf
- .dch
- .der
- .dif
- .dip
- .djvu
- .doc
- .docb
- .docm
- .docx
- .dot
- .dotm
- .dotx
- .dwg
- .dxf
- .edb
- .efx
- .eps
- .fla
- .flv
- .frm
- .gif
- .gpg
- .h
- .hwp
- .ibd
- .idml
- .iff
- .indb
- .indd
- .indl
- .indt
- .inx
- .iso
- .jar
- .jar
- .java
- .jpeg
- .jpg
- .js
- .jsp
- .key
- .lay
- .lay6
- .ldf
- .m3u
- .m3u8
- .m4u
- .max
- .mdb
- .mdf
- .mid
- .mkv
- .mml
- .mov
- .mp3
- .mp4
- .mpa
- .mpeg
- .mpg
- .msg
- .myd
- .myi
- .nef
- .odb
- .odg
- .odp
- .ods
- .odt
- .onetoc2
- .ost
- .otg
- .otp
- .ots
- .ott
- .pas
- .pdb
- .pem
- .pfx
- .php
- .plb
- .pmd
- .png
- .pot
- .potm
- .potx
- .potx
- .ppam
- .ppj
- .pps
- .ppsm
- .ppsx
- .ppt
- .pptm
- .pptx
- .prel
- .prproj
- .ps
- .psd
- .pst
- .ptb
- .py
- .ra
- .rar
- .rar
- .raw
- .rb
- .rtf
- .sch
- .sdf
- .ses
- .sldm
- .sldx
- .slk
- .sln
- .snt
- .sql
- .sqlite3
- .sqlitedb
- .stc
- .std
- .sti
- .stw
- .suo
- .svg
- .swf
- .sxc
- .sxd
- .sxi
- .sxm
- .sxw
- .tar
- .tbk
- .tgz
- .tif
- .tiff
- .txt
- .uop
- .uot
- .v30
- .vbs
- .vcd
- .vcf
- .vdi
- .vmdk
- .vmx
- .vob
- .vsd
- .vsdx
- .wav
- .wk3
- .wk4
- .wks
- .wma
- .wmv
- .wpd
- .wps
- .xla
- .xlam
- .xlc
- .xll
- .xlm
- .xls
- .xlsb
- .xlsm
- .xlsx
- .xlt
- .xltm
- .xltx
- .xlw
- .xml
- .xqx
- .zip
- .eml
It is capable of encrypting files in the affected system.
Ransomware Routine
This Ransomware avoids encrypting files with the following strings in their file path:
- Windows
- Program Files
- Program Files (x86)
It renames encrypted files using the following names:
- {original filename.extension}.resurrection
It drops the following file(s) as ransom note:
- {folders containing encrypted files}\README.html
NOTES:
The ransomware drops this ransom note:
SOLUTION
9.850
13.444.02
01 Jun 2017
13.445.00
02 Jun 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
Step 4
Search and delete this file
- %Desktop%\Recovery.key
- {folders containing encrypted files}\README.html
Step 5
Restart in normal mode and scan your computer with your Trend Micro product for files detected as RANSOM_HIDDENTEARRESU.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 6
Restore encrypted files from backup.
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