RANSOM_CYSEARCHER.THDAFAH
HEUR:Trojan.Win32.Generic (Kaspersky), Trojan.Gen.2 (Norton), Ransom:MSIL/Ryzerlo!rfn (Microsoft)
Windows
Threat Type: Ransomware
Destructiveness: No
Encrypted:
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 encrypts files with specific file extensions. It encrypts files found in specific folders.
TECHNICAL DETAILS
217,600 bytes
EXE
No
16 Apr 2018
Displays message/message boxes, Collects system information, 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 leaves text files that serve as ransom notes containing the following:
- {Encrypted Directory}\READ_IT.html
Information Theft
This Ransomware gathers the following data:
- Computer Name
- User Name
Other Details
This Ransomware connects to the following website to send and receive information:
- http://{BLOCKED}esearcher.com/ransomware/write.php?info={Computer Username}%20l6rZZXKG*nAiEiC
It does the following:
- It encrypts files in every removable drives.
- It executes the following command to terminate and delete itself:
- cmd .exe /C timeout 2 && Del /Q /F " + {Malware File Location}
Ransomware Routine
This Ransomware encrypts files with the following extensions:
- .3fr
- .7z
- .accdb
- .ai
- .apk
- .arch00
- .arw
- .asp
- .aspx
- .asset
- .avi
- .bar
- .bay
- .bc6
- .bc7
- .big
- .bik
- .bkf
- .bkp
- .blob
- .bsa
- .cas
- .cdr
- .cer
- .cfr
- .cr2
- .crt
- .crw
- .css
- .csv
- .csv
- .d3dbsp
- .das
- .dazip
- .db0
- .dba
- .dbf
- .dcr
- .der
- .desc
- .dmp
- .dng
- .doc
- .doc
- .docm
- .docx
- .docx
- .dwg
- .dxg
- .epk
- .eps
- .erf
- .esm
- .ff
- .flv
- .forge
- .fos
- .fpk
- .fsh
- .gdb
- .gho
- .hkdb
- .hkx
- .hplg
- .html
- .hvpl
- .ibank
- .icxs
- .indd
- .itdb
- .itl
- .itm
- .iwd
- .iwi
- .jpe
- .jpg
- .js
- .kdb
- .kdc
- .kf
- .layout
- .lbf
- .litemod
- .lrf
- .ltx
- .lvl
- .m2
- .m3u
- .m4a
- .map
- .mcmeta
- .mdb
- .mdb
- .mdbackup
- .mddata
- .mdf
- .mef
- .menu
- .mlx
- .mov
- .mp4
- .mpqge
- .mrwref
- .ncf
- .nrw
- .ntl
- .odb
- .odc
- .odm
- .odp
- .ods
- .odt
- .odt"
- .orf
- .p12
- .p7b
- .p7c
- .pak
- .pdd
- .pef
- .pem
- .pfx
- .php
- .pk7
- .pkpass
- .png
- .ppt
- .ppt
- .pptm
- .pptx
- .pptx
- .psd
- .psk
- .pst
- .ptx
- .py
- .qdf
- .qic
- .r3d
- .raf
- .rar
- .raw
- .rb
- .re4
- .rgss3a
- .rim
- .rofl
- .rtf
- .rw2
- .rwl
- .sav
- .sb
- .sid
- .sidd
- .sidn
- .sie
- .sis
- .slm
- .sln
- .snx
- .sql
- .sql
- .sr2
- .srf
- .srw
- .sum
- .svg
- .syncdb
- .t12
- .t13
- .tax
- .tor
- .txt
- .upk
- .vcf
- .vdf
- .vfs0
- .vpk
- .vpp_pc
- .vtf
- .w3x
- .wb2
- .wma
- .wmo
- .wmv
- .wotreplay
- .wpd
- .wps
- .x3f
- .xf
- .xlk
- .xls
- .xls
- .xlsb
- .xlsm
- .xlsx
- .xlsx
- .xml
- .xxx
- .zip
- .ztmp
- jpeg
- wallet
It encrypts files found in the following folders:
- %Windows%
- %Program Files%
- %ProgramData%
- %Desktop%
- %User Profile%
(Note: %Windows% is the Windows folder, where it usually is C:\Windows on all Windows operating system versions.. %Program Files% is the Program Files folder, where it usually is C:\Program Files on all Windows operating system versions; C:\Program Files (x86) for 32-bit applications running on Windows 64-bit operating systems.. %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.. %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.. %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003, or C:\Users\{user name} on Windows Vista and 7.)
It appends the following extension to the file name of the encrypted files:
- .CYBERRESEARCHER
SOLUTION
9.850
14.194.04
16 Apr 2018
14.195.00
17 Apr 2018
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
Identify and terminate files detected as RANSOM_CYSEARCHER.THDAFAH
- Windows Task Manager may not display all running processes. In this case, please use a third-party process viewer, preferably Process Explorer, to terminate the malware/grayware/spyware file. You may download the said tool here.
- If the detected file is displayed in either Windows Task Manager or Process Explorer but you cannot delete it, restart your computer in safe mode. To do this, refer to this link for the complete steps.
- If the detected file is not displayed in either Windows Task Manager or Process Explorer, continue doing the next steps.
Step 4
Search and delete these files
- {Encrypted Directory}\READ_IT.html
Step 5
Scan your computer with your Trend Micro product to delete files detected as RANSOM_CYSEARCHER.THDAFAH. 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 the following Trend Micro Support pages for more information:
Step 6
Restore encrypted files from backup.
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