Analysis by: Ryan Paolo Maglaque
ALIASES:

Trojan-Ransom.MSIL.Agent.zs(Kaspersky)

 PLATFORM:

Windows

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

  • Threat Type: Ransomware

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

Infection Channel: Dropped by other malware, Downloaded from the Internet

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.

  TECHNICAL DETAILS

File Size: 11,776 bytes
File Type: EXE
Memory Resident: No
Initial Samples Received Date: 01 Aug 2017
Payload: Creates files

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.

Other Details

This Ransomware does the following:

  • Creates the file C:\Users\DORA\Desktop\t322.txt which would contain a list of files with one of the following extensions:
    • .der
    • .pfx
    • .key
    • .crt
    • .csr
    • .p12
    • .pem
    • .odt
    • .ott
    • .sxw
    • .stw
    • .uot
    • .3ds
    • .max
    • .3dm
    • .ods
    • .ots
    • .sxc
    • .stc
    • .dif
    • .slk
    • .wb2
    • .odp
    • .otp
    • .sxd
    • .std
    • .uop
    • .odg
    • .otg
    • .sxm
    • .mml
    • .lay
    • .lay6
    • .asc
    • .sqlite3
    • .sqlitedb
    • .sql
    • .accdb
    • .mdb
    • .dbf
    • .odb
    • .frm
    • .myd
    • .myi
    • .ibd
    • .mdf
    • .ldf
    • .sln
    • .suo
    • .cpp
    • .pas
    • .asm
    • .cmd
    • .bat
    • .ps1
    • .vbs
    • .dip
    • .dch
    • .sch
    • .brd
    • .jsp
    • .php
    • .asp
    • .java
    • .jar
    • .class
    • .mp3
    • .wav
    • .swf
    • .fla
    • .wmv
    • .mpg
    • .vob
    • .mpeg
    • .asf
    • .avi
    • .mov
    • .mp4
    • .3gp
    • .mkv
    • .3g2
    • .flv
    • .wma
    • .mid
    • .m3u
    • .m4u
    • .djvu
    • .svg
    • .psd
    • .nef
    • .tiff
    • .tif
    • .cgm
    • .raw
    • .gif
    • .png
    • .bmp
    • .jpg
    • .jpeg
    • .vcd
    • .iso
    • .backup
    • .zip
    • .rar
    • .tgz
    • .tar
    • .bak
    • .tbk
    • .bz2
    • .PAQ
    • .ARC
    • .aes
    • .gpg
    • .vmx
    • .vmdk
    • .vdi
    • .sldm
    • .sldx
    • .sti
    • .sxi
    • .602
    • .hwp
    • .snt
    • .onetoc2
    • .dwg
    • .pdf
    • .wk1
    • .wks
    • .123
    • .rtf
    • .csv
    • .txt
    • .vsdx
    • .vsd
    • .edb
    • .eml
    • .msg
    • .ost
    • .pst
    • .potm
    • .potx
    • .ppam
    • .ppsx
    • .ppsm
    • .pps
    • .pot
    • .pptm
    • .pptx
    • .ppt
    • .xltm
    • .xltx
    • .xlc
    • .xlm
    • .xlt
    • .xlw
    • .xlsb
    • .xlsm
    • .xlsx
    • .xls
    • .dotx
    • .dotm
    • .dot
    • .docm
    • .docb
    • .docx
    • .doc
    • .xps
    • .gz
    • .7z
    • .ai
    • .sh
    • .rb
    • .pl
    • .vb
    • .js
    • .h
    • .c
    • .cs
    • .db
  • Contains a function(but was not used) that would encrypt files in C:\Users\DORA\Downloads\Photoshop.CC.2017

NOTES:

This ransomware is in development (in-dev ransomware).

It also does not encrypt files.

  SOLUTION

Minimum Scan Engine: 9.850
FIRST VSAPI PATTERN FILE: 13.570.04
FIRST VSAPI PATTERN DATE: 02 Aug 2017
VSAPI OPR PATTERN File: 13.571.00
VSAPI OPR PATTERN Date: 03 Aug 2017

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

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


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