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RANSOM_EDA2ANUBIS.A

November 29, 2016
 Analysis by: Ryan Gardo
 PLATFORM:

Windows

 OVERALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:
 INFORMATION EXPOSURE:

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

Infection Channel:

Dropped by other malware, Downloaded from the Internet


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.

It connects to certain websites to send and receive information. However, as of this writing, the said sites are inaccessible.

  TECHNICAL DETAILS

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

15 Oct 2016

Payload:

Connects to URLs/IPs, Displays graphics/image, Encrypts 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:

  • %Desktop%\Decrpytion Instructions - 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.)

Download Routine

This Trojan saves the files it downloads using the following names:

  • %User Profile%\ransom.jpg

(Note: %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.)

Information Theft

This Trojan gathers the following data:

  • Computer Name

Other Details

This Trojan connects to the following website to send and receive information:

  • http://{BLOCKED}.{BLOCKED}.37.177/rs/createkeys.php
  • http://{BLOCKED}.{BLOCKED}.37.177/rs/savekey.php

It encrypts files with the following extensions:

  • .3dm
  • .3ds
  • .3g2
  • .3gp
  • .602
  • .aes
  • .arc
  • .asc
  • .asf
  • .asm
  • .asp
  • .avi
  • .bak
  • .bat
  • .bmp
  • .brd
  • .cgm
  • .cmd
  • .cpp
  • .crt
  • .csr
  • .csv
  • .dbf
  • .dch
  • .dif
  • .dip
  • .djv
  • .djvu
  • .doc
  • .docb
  • .docm
  • .docx
  • .dot
  • .dotm
  • .dwg
  • .dotx
  • .exe
  • .fla
  • .flv
  • .frm
  • .gif
  • .gpg
  • .hwp
  • .ibd
  • .iso
  • .jar
  • .java
  • .jpeg
  • .jpg
  • .key
  • .lay
  • .lay6
  • .ldf
  • .lnk
  • .log
  • .m3u
  • .m4u
  • .max
  • .mdb
  • .mdf
  • .mid
  • .mkv
  • .mov
  • .mp3
  • .mp4
  • .mpeg
  • .mpg
  • .ms11
  • .myd
  • .myi
  • .nef
  • .odb
  • .odg
  • .odp
  • .ods
  • .odt
  • .otg
  • .otp
  • .ots
  • .ott
  • .p12
  • .paq
  • .pas
  • .pdf
  • .pem
  • .php
  • .png
  • .pot
  • .potm
  • .potx
  • .ppam
  • .pps
  • .ppsm
  • .ppsx
  • .ppt
  • .pptm
  • .pptx
  • .psd
  • .rar
  • .raw
  • .rtf
  • .sch
  • .sldm
  • .sldx
  • .slk
  • .stc
  • .std
  • .sti
  • .stw
  • .svg
  • .swf
  • .sxc
  • .sxd
  • .sxi
  • .sxm
  • .sxw
  • .sql
  • .sqlitedb
  • .tar
  • .tbk
  • .tgz
  • .tif
  • .tiff
  • .txt
  • .uop
  • .uot
  • .vbs
  • .vdi
  • .vmdk
  • .vmx
  • .vob
  • .wav
  • .wb2
  • .wk1
  • .wks
  • .wma
  • .wmv
  • .xlc
  • .xlm
  • .xls
  • .xlsb
  • .xlsm
  • .xlsx
  • .xlt
  • .xltm
  • .xltx
  • .xlw
  • .zip
  • .7z

It renames encrypted files using the following names:

  • {original filename}.coded

However, as of this writing, the said sites are inaccessible.

NOTES:

This ransomware shows the following image after encryption:

  SOLUTION

Minimum Scan Engine:

9.800

FIRST VSAPI PATTERN FILE:

12.844.03

FIRST VSAPI PATTERN DATE:

18 Oct 2016

VSAPI OPR PATTERN File:

12.845.00

VSAPI OPR PATTERN Date:

19 Oct 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

[ Learn More ]

Step 4

Search and delete this file

[ Learn More ]
There may be some files that are hidden. Please make sure you check the Search Hidden Files and Folders checkbox in the "More advanced options" option to include all hidden files and folders in the search result.
  • %Desktop%\Decrpytion Instructions
  • %User Profile%\ransom.jpg

Step 5

Scan your computer with your Trend Micro product to delete files detected as RANSOM_EDA2ANUBIS.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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