RANSOM_DATAKEEPER.B
MSIL/Filecoder_DataKeeper.A!tr (Fortinet), a variant of MSIL/Filecoder.DataKeeper.A trojan (NOD32),
Windows
Threat Type: Ransomware
Destructiveness: No
Encrypted:
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 drops files as ransom note.
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.
Installation
This Ransomware drops the following files:
- {Malware File Path}\Exception.5
- %AppDataLocal%\{random name}.bat - Used to delete its dropped copy, deleted after execution
(Note: %AppDataLocal% is the Application Data folder found in Local Settings, where it is usually C:\Documents and Settings\{user name}\Local Settings\Application Data on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local on 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.)
It drops and executes the following files:
- %AppDataLocal%\{random name}.bin - Also detected as Ransom_DATAKEEPER.B
It adds the following processes:
- "vssadmin.exe" Delete Shadow /All /Quiet
Ransomware Routine
This Ransomware encrypts files with the following extensions:
- 3fr
- 7z
- accdb
- ai
- apk
- arch00
- arw
- asset
- avi
- bar
- bay
- bc6
- bc7
- big
- bik
- bkf
- bkp
- blob
- bsa
- cas
- cdr
- cer
- cfr
- cr2
- crt
- crw
- css
- csv
- d3dbsp
- das
- dazip
- db0
- dba
- dbf
- dcr
- der
- desc
- dmp
- dng
- doc
- docm
- docx
- dwg
- dxg
- epk
- eps
- erf
- esm
- ff
- flv
- forge
- fos
- fpk
- fpt
- fsh
- gdb
- gho
- hkdb
- hkx
- hplg
- hvpl
- ibank
- icxs
- indd
- itdb
- itl
- itm
- iwd
- iwi
- jpe
- jpeg
- jpg
- js
- kdb
- kdc
- kf
- layout
- lbf
- litemod
- lrf
- ltx
- lvl
- m2
- m3u
- m4a
- map
- mcmeta
- mdb
- mdbackup
- mddata
- mdf
- mef
- menu
- mlx
- mov
- mp4
- mpqge
- mrwref
- ncf
- nrw
- ntl
- odb
- odc
- odm
- odp
- ods
- odt
- orf
- p12
- p7b
- p7c
- pak
- pdd
- pef
- pem
- pfx
- pkpass
- png
- ppt
- pptm
- 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
- snx
- sql
- sr2
- srf
- srw
- sum
- svg
- syncdb
- t12
- t13
- tax
- tc
- tor
- txt
- upk
- vcf
- vdf
- vfs0
- vpk
- vpppc
- vtf
- w3x
- wallet
- wb2
- wma
- wmo
- wmv
- wotreplay
- wpd
- wps
- x3f
- xf
- xlk
- xls
- xlsb
- xlsm
- xlsx
- xxx
- zip
- ztmp
It avoids encrypting files found in the following folders:
- WINDOWS
- PROGRAM
- SYSTEM
- SETTINGS
- APPDATA
- APPLICATION
- RECENT
It drops the following file(s) as ransom note:
- {Encrypted folder}\!!! ##### === ReadMe === ##### !!!.htm
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
Search and delete this file
- {Malware File Path}\Exception.5
Step 4
Scan your computer with your Trend Micro product to delete files detected as RANSOM_DATAKEEPER.B. 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 5
Restore encrypted files from backup.
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