Analysis by: Henry Alarcon Jr.
ALIASES:

Trojan:Win32/Occamy.B (Microsoft), Trojan-Ransom.MSIL.Agent.fqnw (Kaspersky)

 PLATFORM:

Windows

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

  • Threat Type: Ransomware

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

Infection Channel: Dropped by other malware

This Ransomware may be dropped by other malware.

  TECHNICAL DETAILS

File Size: 484864 bytes
File Type: EXE
Memory Resident: No
Payload: Steals information

Arrival Details

This Ransomware may be dropped by the following malware:

Stolen Information

This Ransomware saves the stolen information in the following file:

  • %Application Data%\Extension\Extension.dat

(Note: %Application Data% is the current user's Application Data folder, which is usually C:\Documents and Settings\{user name}\Application Data on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Roaming on Windows Vista, 7, and 8.)

It sends the gathered information via HTTP POST to the following URL:

  • http://app.{BLOCKED}llobal.com/check.php?action=register&uniqueKey={12 Random Character}&userName={Machine Name}\{Username}&ipAddress={Ip Address}

Other Details

This Ransomware connects to the following URL(s) to get the affected system's IP address:

  • http://ipinfo.io/ip

It encrypts files with the following extensions:

  • .3dm
  • .3fr
  • .3g2
  • .3gp
  • .7z
  • .aaf
  • .accdb
  • .aep
  • .aepx
  • .aet
  • .ai
  • .aif
  • .apk
  • .arch00
  • .arw
  • .as
  • .as3
  • .asf
  • .asp
  • .aspx
  • .asset
  • .asx
  • .avi
  • .bar
  • .bay
  • .bc6
  • .bc7
  • .big
  • .bik
  • .bkf
  • .bkp
  • .blob
  • .bmp
  • .bsa
  • .cs
  • .csproj
  • .cas
  • .cdr
  • .cer
  • .cfr
  • .class
  • .config
  • .cpp
  • .cr2
  • .crt
  • .crw
  • .cs
  • .css
  • .csv
  • .d3dbsp
  • .das
  • .dazip
  • .db
  • .db0
  • .dba
  • .dbf
  • .dcr
  • .der
  • .desc
  • .dmp
  • .dng
  • .doc
  • .docb
  • .docm
  • .docx
  • .dot
  • .dotm
  • .dotx
  • .dwg
  • .dxf
  • .dxg
  • .efx
  • .epk
  • .eps
  • .erf
  • .esm
  • .ff
  • .fla
  • .flv
  • .forge
  • .fos
  • .fpk
  • .fsh
  • .gdb
  • .gho
  • .hkdb
  • .hkx
  • .hplg
  • .html
  • .hvpl
  • .ibank
  • .icxs
  • .idml
  • .iff
  • .indb
  • .indd
  • .indl
  • .indt
  • .inx
  • .itdb
  • .itl
  • .itm
  • .iwd
  • .iwi
  • .jar
  • .java
  • .jpe
  • .jpeg
  • .jpg
  • .js
  • .kdb
  • .kdc
  • .kf
  • .layout
  • .lbf
  • .litemod
  • .lrf
  • .ltx
  • .lvl
  • .m2
  • .m3u
  • .m3u8
  • .m4a
  • .m4u
  • .map
  • .max
  • .mcmeta
  • .mdb
  • .mdbackup
  • .mddata
  • .mdf
  • .mef
  • .menu
  • .mid
  • .mlx
  • .mov
  • .mp3
  • .mp4
  • .mpa
  • .mpeg
  • .mpg
  • .mpqge
  • .mrw
  • .mrwref
  • .msg
  • .ncf
  • .nef
  • .nrw
  • .ntl
  • .odb
  • .odc
  • .odm
  • .odp
  • .ods
  • .odt
  • .orf
  • .p12
  • .p7b
  • .p7c
  • .pak
  • .pdb
  • .pdd
  • .pdf
  • .pef
  • .pem
  • .pfx
  • .php
  • .pk7
  • .pkpass
  • .plb
  • .pmd
  • .png
  • .pot
  • .potm
  • .potx
  • .ppam
  • .ppj
  • .pps
  • .ppsm
  • .ppsx
  • .ppt
  • .pptm
  • .pptx
  • .prel
  • .prproj
  • .ps
  • .psd
  • .psk
  • .pst
  • .ptx
  • .py
  • .qdf
  • .qic
  • .r3d
  • .ra
  • .raf
  • .rar
  • .raw
  • .rb
  • .re4
  • .rgss3a
  • .rim
  • .rofl
  • .rtf
  • .resx
  • .rw2
  • .rwl
  • .sav
  • .sb
  • .sdf
  • .settings
  • .sid
  • .sidd
  • .sidn
  • .sie
  • .sis
  • .sldm
  • .sldx
  • .slm
  • .sln
  • .snx
  • .sql
  • .sr2
  • .srf
  • .srw
  • .sum
  • .svg
  • .swf
  • .syncdb
  • .t12
  • .t13
  • .tax
  • .tif
  • .tor
  • .txt
  • .upk
  • .vcf
  • .vdf
  • .vfs0
  • .vob
  • .vpk
  • .vpp_pc
  • .vtf
  • .w3x
  • .wallet
  • .wav
  • .wb2
  • .wma
  • .wmo
  • .wmv
  • .wotreplay
  • .wpd
  • .wps
  • .x3f
  • .xf
  • .xla
  • .xlam
  • .xlk
  • .xll
  • .xlm
  • .xls
  • .xlsb
  • .xlsm
  • .xlsx
  • .xlt
  • .xltm
  • .xltx
  • .xlw
  • .xml
  • .xqx
  • .xxx
  • .zip
  • .ztmp

It does the following:

  • After encypting files:
    • It creates a copy of the following file:
    • It executes the created copy found in:
      • %Desktop%\Message.exe
      • It displays the following:

Ransomware Routine

This Ransomware avoids encrypting files with the following strings in their file path:

  • .nuget packages node_modules cache caches temp

It appends the following extension to the file name of the encrypted files:

  • .xlockr

  SOLUTION

Minimum Scan Engine: 9.850
FIRST VSAPI PATTERN FILE: 14.490.05
FIRST VSAPI PATTERN DATE: 07 Sep 2018
VSAPI OPR PATTERN File: 14.491.00
VSAPI OPR PATTERN Date: 08 Sep 2018

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

Identify and terminate files detected as Ransom_XLOCKR.THIOGAH

[ Learn More ]
  1. Windows Task Manager may not display all running processes. In this case, please use a third-party process viewer, preferably Process Explorer, to terminate the malware/grayware/spyware file. You may download the said tool here.
  2. If the detected file is displayed in either Windows Task Manager or Process Explorer but you cannot delete it, restart your computer in safe mode. To do this, refer to this link for the complete steps.
  3. If the detected file is not displayed in either Windows Task Manager or Process Explorer, continue doing the next steps.

Step 4

Search and delete these files

[ 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%\Message.exe

Step 5

Scan your computer with your Trend Micro product to delete files detected as Ransom_XLOCKR.THIOGAH. 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 6

Restore encrypted files from backup.


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