RANSOM_PROTOBTC.A
Ransom.Radamant (Malwarebytes)
Windows
Threat Type: Trojan
Destructiveness: No
Encrypted: No
In the wild: Yes
OVERVIEW
Downloaded from the Internet, Dropped by other malware
This Trojan 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
320,512 bytes
EXE
Yes
12 Nov 2016
Encrypts files, Renames files, Drops files
Arrival Details
This Trojan 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 Trojan drops the following files:
- {malware path}\key.private
- {malware path}\key.public
- {folder of encrypted files}\BTC_DECRYPT_FILES.txt - ransom note
Other Details
This Trojan encrypts files with the following extensions:
- .m4a
- .wma
- .avi
- .wmv
- .csv
- .d3dbsp
- .zip
- .sie
- .sum
- .ibank
- .t13
- .t12
- .qdf
- .gdb
- .tax
- .pkpass
- .bc6
- .bc7
- .bkp
- .qic
- .bkf
- .sidn
- .sidd
- .mddata
- .itl
- .itdb
- .icxs
- .hvpl
- .hplg
- .hkdb
- .mdbackup
- .syncdb
- .gho
- .cas
- .svg
- .map
- .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
- .kdb
- .db0
- .dba
- .rofl
- .hkx
- .bar
- .upk
- .das
- .iwi
- .litemod
- .asset
- .forge
- .ltx
- .bsa
- .apk
- .re4
- .sav
- .lbf
- .slm
- .bik
- .epk
- .rgss3a
- .pak
- .big
- .wallet
- .wotreplay
- .xxx
- .desc
- .py
- .m3u
- .flv
- .js
- .css
- .rb
- .png
- .jpeg
- .txt
- .p7c
- .p7b
- .p12
- .pfx
- .pem
- .crt
- .cer
- .der
- .x3f
- .srw
- .pef
- .ptx
- .r3d
- .rw2
- .rwl
- .raw
- .raf
- .orf
- .nrw
- .mrwref
- .mef
- .erf
- .kdc
- .dcr
- .cr2
- .crw
- .bay
- .sr2
- .srf
- .arw
- .3fr
- .dng
- .jpe
- .jpg
- .cdr
- .indd
- .ai
- .eps
- .pdd
- .psd
- .dbf
- .mdf
- .wb2
- .rtf
- .wpd
- .dxg
- .xf
- .dwg
- .pst
- .accdb
- .mdb
- .pptm
- .pptx
- .ppt
- .xlk
- .xlsb
- .xlsm
- .xlsx
- .xls
It renames encrypted files using the following names:
- {file name}.{file extension}.BTC
It does the following:
- It deletes all shadow copies by executing the following command:
- cmd /c start vssadmin delete shadows /all /quiet
- It drops the following ransom note:
NOTES:
The ransomware displays the following window upon execution:
It has the capability to encrypt or decrypt files located in the fixed drives. The user needs to input a command for it to continue.
Once finished, it will display the time it took and the number of bytes it has processed.
SOLUTION
9.800
12.900.08
14 Nov 2016
12.901.00
15 Nov 2016
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
- {malware path}\key.private
- {malware path}\key.public
- {folder of encrypted files\BTC_DECRYPT_FILES.txt
Step 5
Restart in normal mode and scan your computer with your Trend Micro product for files detected as RANSOM_PROTOBTC.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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