RANSOM_HIDDENTEARDARKCRY.A
Ransom.HiddenTear!g1(Norton);Troj/Cryptear-A(Sophos)
Windows

Threat Type: Ransomware
Destructiveness: No
Encrypted: No
In the wild: Yes
OVERVIEW
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 encrypts files with specific file extensions. It encrypts files found in specific folders.
TECHNICAL DETAILS
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.
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
MyApp = {Malware File Path}
Download Routine
This Ransomware accesses the following websites to download files:
- https://{BLOCKED}5.sendspace.com/dl/cfa234a08631f7ce619d5677a3e9d2bb/591c9f3a1cd8b82c/vlnbd3/%40%20READ-ME%20-%20DARKODER%20ENCRYPT0R%20%40.html - contains a download link for the ransom note
- https://{BLOCKED}5.sendspace.com/dl/b85652e629cbece7b5c36054ba60be62/591c8dc245a7b944/zxc4st/%40%20READ-ME%20-%20DARKODER%20ENCRYPT0R%20%40.txt - contains a download link for the ransom note
It saves the files it downloads using the following names:
- C:\Users\{User name}\Desktop\@ READ-ME - DARKODER ENCRYPT0R @.html - offline copy of the link
- C:\Users\{User name}\Desktop\@ DARKODER ENCRYPT0R @exe - offline copy of the link
Other Details
This Ransomware does the following:
- Display the following window as ransom note:
Ransomware Routine
This Ransomware encrypts files with the following extensions:
- .doc
- .docx
- .xls
- .xlsx
- .ppt
- .pptx
- .pst
- .ost
- .msg
- .eml
- .vsd
- .vsdx
- .txt
- .csv
- .rtf
- .123
- .wks
- .wk1
- .dwg
- .onetoc2
- .snt
- .jpeg
- .jpg
- .docb
- .docm
- .dot
- .dotm
- .dotx
- .xlsm
- .xlsb
- .xlw
- .xlt
- .xlm
- .xlc
- .xltx
- .xltm
- .pptm
- .pot
- .pps
- .ppsm
- .ppsx
- .ppam
- .potx
- .potm
- .edb
- .hwp
- .602
- .sxi
- .sti
- .sldx
- .sldm
- .sldm
- .vdi
- .vmdk
- .vmx
- .gpg
- .aes
- .ARC
- .PAQ
- .bz2
- .tbk
- .bak
- .tar
- .tgz
- .gz
- .7z
- .rar
- .zip
- .backup
- .iso
- .vcd
- .bmp
- .png
- .gif
- .raw
- .cgm
- .tif
- .tiff
- .nef
- .psd
- .ai
- .svg
- .djvu
- .m4u
- .m3u
- .mid
- .wma
- .flv
- .3g2
- .mkv
- .3gp
- .mp4
- .mov
- .avi
- .asf
- .mpeg
- .vob
- .mpg
- .wmv
- .fla
- .swf
- .wav
- .mp3
- .sh
- .class
- .jar
- .java
- .rb
- .asp
- .php
- .jsp
- .brd
- .sch
- .dch
- .dip
- .pl
- .vb
- .vbs
- .ps1
- .bat
- .cmd
- .js
- .asm
- .h
- .pas
- .cpp
- .c
- .cs
- .suo
- .sln
- .ldf
- .mdf
- .ibd
- .myi
- .myd
- .frm
- .odb
- .dbf
- .db
- .mdb
- .accdb
- .sql
- .sqlitedb
- .sqlite3
- .asc
- .lay6
- .lay
- .mml
- .sxm
- .otg
- .odg
- .uop
- .std
- .sxd
- .otp
- .odp
- .wb2
- .slk
- .dif
- .stc
- .sxc
- .ots
- .ods
- .3dm
- .max
- .3ds
- .uot
- .stw
- .sxw
- .ott
- .odt
- .pem
- .p12
- .csr
- .crt
- .key
- .pfx
- .der
- .WNCRY
It encrypts files found in the following folders:
- C:\Users\{User name}\Desktop
It appends the following extension to the file name of the encrypted files:
- .DARKCRY
NOTES:
The ransom note contains the following content if downloaded successfully:
SOLUTION
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
Delete this registry value
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
- MyApp = {Malware File Path}
- MyApp = {Malware File Path}
Step 5
Search and delete these files
- C:\Users\{User name}\Desktop\@ READ-ME - DARKODER ENCRYPT0R @.html
- C:\Users\{User name}\Desktop\@ DARKODER ENCRYPT0R @exe
Step 6
Restart in normal mode and scan your computer with your Trend Micro product for files detected as RANSOM_HIDDENTEARDARKCRY.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 7
Restore encrypted files from backup.
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