RANSOM_AUTOLOCKY.A
Trojan-Ransom.Win32.CryFile.xwc (Kaspersky), Win32/Filecoder.AutoLocky.A (ESET), RDN/Ransom (McAfee)
Windows
Threat Type: Trojan
Destructiveness: No
Encrypted: Yes
In the wild: Yes
OVERVIEW
Downloaded from the Internet
Impersonates locky ransomware
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
503,617 bytes
EXE
No
10 May 2016
Encrypts files, Displays message/message boxes
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:
- %Desktop%\info.html - ransom note
- %Desktop%\info.txt - ransom note
(Note: %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.)
Autostart Technique
This Trojan drops the following file(s) in the Windows User Startup folder to enable its automatic execution at every system startup:
- %User Startup%\Start.lnk
(Note: %User Startup% is the current user's Startup folder, which is usually C:\Documents and Settings\{user}\Start Menu\Programs\Startup on Windows 2000 and XP, and C:\Documents and Settings\{User name}\Start Menu\Programs\Startup on Windows Vista, 7, and 8.)
Other System Modifications
This Trojan modifies the following file(s):
- It encrypts files and appends the extension .locky to the encrypted files
Other Details
This Trojan encrypts files with the following extensions:
- 3ds
- 3fr
- 3pr
- 7z
- accdb
- accde
- accdr
- accdt
- adb
- agd1
- ai
- ait
- al
- apj
- arw
- asm
- asp
- awg
- backup
- backupdb
- bdb
- bik
- blend
- bmp
- c
- cdr
- cdr3
- cdr4
- cdr5
- cdr6
- cdrw
- cdx
- ce1
- ce2
- cer
- cgm
- cib
- cls
- cmt
- cpi
- cpp
- cr2
- craw
- crt
- crw
- csh
- csl
- css
- csv
- db
- db-journal
- db3
- dbf
- dc2
- dcr
- dcs
- ddoc
- ddrw
- der
- design
- dng
- doc
- docm
- docx
- dot
- dotm
- dotx
- drf
- drw
- dwg
- dxb
- erbsql
- erf
- exf
- fdb
- fff
- fh
- fhd
- fpx
- fxg
- gray
- grey
- gry
- h
- hpp
- ibd
- ibz
- idx
- iiq
- incpas
- jpeg
- jpg
- js
- kc2
- kdbx
- kdc
- kpdx
- lua
- mdb
- mdc
- mef
- mfw
- mos
- mrw
- myd
- ndd
- nef
- nop
- nrw
- ns2
- ns3
- ns4
- nsd
- nsf
- nsg
- nsh
- nwb
- nx1
- nx2
- nyf
- odb
- odf
- odg
- odm
- odp
- ods
- odt
- orf
- otg
- oth
- otp
- ots
- ott
- p12
- p7b
- p7c
- pat
- pcd
- pef
- pem
- pfx
- php
- pl
- pot
- potm
- potx
- ppam
- pps
- ppsm
- ppsx
- ppt
- pptm
- pptx
- ps
- psafe3
- psd
- ptx
- py
- ra2
- raf
- rar
- raw
- rdb
- rtf
- rw2
- rwl
- rwz
- s3db
- sas7bdat
- sav
- sd0
- sd1
- sda
- sdf
- sldm
- sldx
- sql
- sqlite
- sqlite3
- sqlitedb
- sr2
- srf
- srw
- st4
- st5
- st6
- st7
- st8
- stc
- std
- sti
- stw
- stx
- sxc
- sxd
- sxg
- sxi
- sxw
- txt
- wb2
- x3f
- xla
- xlam
- xll
- xlm
- xls
- xlsb
- xlsm
- xlsx
- xlt
- xltm
- xltx
- xlw
- xml
- ycbcra
- zip
NOTES:
The dropped ransom note info.html contains the following message:
The dropped ransom note info.txt contains the following message:
SOLUTION
9.800
12.518.03
10 May 2016
12.519.00
11 May 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
- %Desktop%\info.html
- %Desktop%\info.txt
- %User Startup%\Start.lnk
Step 5
Restart in normal mode and scan your computer with your Trend Micro product for files detected as RANSOM_AUTOLOCKY.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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