RANSOM_KTZWARE.A
Mal/Ktzware-A(Sophos);a variant of MSIL/Filecoder.Kuntzware.A trojan(Eset-NOD32)
Windows
Threat Type: Ransomware
Destructiveness: No
Encrypted: No
In the wild: Yes
OVERVIEW
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.
It encrypts files with specific file extensions.
TECHNICAL DETAILS
29,184 bytes
EXE
No
20 Jun 2017
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.
Ransomware Routine
This Ransomware encrypts files with the following extensions:
- .kuntzware
- .doc
- .docx
- .log
- .msg
- .odt
- .pages
- .rtf
- .tex
- .txt
- .wpd
- .csv
- .dat
- .key
- .keychain
- .pps
- .ppt
- .pptx
- .sdf
- .tar
- .tax2016
- .vcf
- .xml
- .aif
- .iff
- .m3u
- .m4a
- .mid
- .mp3
- .mpa
- .wav
- .wma
- .3g2
- .3gp
- .asf
- .avi
- .flv
- .m4v
- .mov
- .mp4
- .mpg
- .rm
- .srt
- .swf
- .vob
- .wmv
- .3dm
- .3ds
- .max
- .obj
- .bmp
- .dds
- .gif
- .jpg
- .png
- .psd
- .pspimage
- .tga
- .thm
- .tif
- .tiff
- .yuv
- .al
- .eps
- .ps
- .svg
- .xlr
- .xls
- .xlsx
- .accdb
- .db
- .dbf
- .mdb
- .pdb
- .sql
- .7z
- .cbr
- .deb
- .gz
- .pkg
- .rar
- .rpm
- .sitx
- .tar.gz
- .zip
- .zipx
- .wallet
It avoids encrypting files found in the following folders:
- windows
- program files
It appends the following extension to the file name of the encrypted files:
- .kuntzware
NOTES:
Due to code error, the malware does not encrypt files. It also seems that the malware is currently under development.
SOLUTION
9.850
13.482.07
20 Jun 2017
13.483.00
21 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
Scan your computer with your Trend Micro product to delete files detected as RANSOM_KTZWARE.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.
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