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RANSOM_ZIPRAMEN.A

August 15, 2017
 ALIASES:

Mal/ZipRamen-A (Sophos_Lite); W32.Golroted (Norton); Trojan horse Atros5.CEXT (AVG)

 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.

It terminates itself if it detects it is being run in a virtual environment.

  TECHNICAL DETAILS

File Size:

19,456 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

14 May 2017

Payload:

Connects to URLs/IPs, Steals information, Encrypts 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.

Information Theft

This Ransomware gathers the following data:

  • Mother Board Code
  • ZIP Password
  • Machine Name
  • OS Full Name
  • OS Version: Version String
  • OS Version: Service Pack
  • OS Platform
  • OS Version
  • Total Physical Memory
  • Mac Address
  • CPU Name
  • Video Card
  • Processor Count
  • Username

Stolen Information

This Ransomware sends the gathered information via HTTP POST to the following URL:

  • https://script.{BLOCKED}e.com/macros/s/AKfycbz5YBBStQ1g_RauMp1Y-psBBObGiK2E6c4lqss898wad1fp0To/exec

Other Details

This Ransomware connects to the following URL(s) to check for an Internet connection:

  • https://script.{BLOCKED}e.com/macros/s/AKfycbz5YBBStQ1g_RauMp1Y-psBBObGiK2E6c4lqss898wad1fp0To/exec

It terminates itself if it detects it is being run in a virtual environment.

It does the following:

  • It displays a message box if it detects it is being run in a virtual environment.

  • It moves each files with the following extension names from "%User Profile%\Music" to a password protected zip file with the filename "%User Temp%\Music\{original filename}.ramen":
    • .doc
    • .png
    • .jpg
    • .gif
    • .zip
    • .rar
    • .bmp
    • .7z
    • .wav
    • .wmv
    • .tif
    • .pdf
    • .part1
    • .csv
    • .xls
    • .docx
    • .xlsx
    • .ppt
    • .pptx
    • .avi
    • .rmvb
    • .rm
    • .mp4
    • .ai
    • .psd
    • .webm
    • .webp
    • .mkv
    • .dat
    • .sav
    • .save
    • .mp3
    • .asp
    • .vb
    • .js
    • .php
    • .cs
    • .py
    • .rb
    • .css
    • .html
    • .sav
    • .apk
    • .torrent
    • .db
    • .mp4

It checks if the following virtual machine- or sandbox-related registry entries are present in the affected system:

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Control\Class\{4D36E968-E325-11CE-BFC1-08002BE10318}\
0000
DriverDesc = "{string contains: VMWare}"

  SOLUTION

Minimum Scan Engine:

9.850

FIRST VSAPI PATTERN FILE:

13.440.01

FIRST VSAPI PATTERN DATE:

14 May 2017

VSAPI OPR PATTERN File:

13.441.00

VSAPI OPR PATTERN Date:

15 May 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

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

Scan your computer with your Trend Micro product to delete files detected as RANSOM_ZIPRAMEN.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 4

Restore encrypted files from backup.


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