Analysis by: John Rey Canon
ALIASES:

HEUR:Backdoor.Win32.Androm.gen (Kaspersky); Trojan:Win32/Casdet!rfn (Microsoft); Trojan.Crypt (Ikarus)

 PLATFORM:

Windows

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

  • Threat Type: Trojan Spy

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW

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

This Trojan Spy arrives as an attachment to email messages spammed by other malware/grayware or malicious users. It 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: 959,488 bytes
File Type: EXE
Memory Resident: Yes
Initial Samples Received Date: 04 Oct 2018
Payload: Connects to URLs/IPs, Steals information, Logs keystrokes, Downloads files

Arrival Details

This Trojan Spy arrives as an attachment to email messages spammed by other malware/grayware or malicious users.

It 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 Spy drops the following copies of itself into the affected system and executes them:

  • %User Temp%\tmp{Random Filename}.tmp

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

It adds the following processes:

  • "%Windows%\Microsoft.NET\Framework\v2.0.50727\vbc.exe" /stext "%User Temp%\tmp{Random Filename}.tmp"

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

Information Theft

This Trojan Spy gathers the following data:

  • Computer name
  • Local Date and Time
  • Installed Language
  • Operating System Platform
  • Operating System Version
  • Key logs
  • Clipboard logs
    • Stealing account information from the following applications:
    • Minecraft
    • FileZilla

It attempts to steal stored email credentials from the following:

  • Thunderbird
  • Eudora
  • Internet Account Manager
  • MS Outlook
  • Outlook Express
  • Group Mail Free
  • IncrediMail
  • Windows Mail
  • Windows Live Mail
  • Yahoo! Mail
  • Gmail
  • Facebook

It attempts to get stored information such as user names, passwords, and hostnames from the following browsers:

  • Firefox
  • SeaMonkey
  • YandexBrowser
  • Vivaldi
  • Chrome
  • Chromium
  • Opera
  • Internet Explorer

Stolen Information

This Trojan Spy sends the data it gathers to the following email addresses via SMTP:

  • {BLOCKED}ns@{BLOCKED}oup.space

Other Details

This Trojan Spy does the following:

    • It terminates itself is the following files/strings exist:
    • Virtual Machine:
      • VMwareVMware
      • XenVMMXenVMM
      • prl hyperv
      • Microsoft Hv
      • KVMKVMKVM
    • Monitoring Tools:
      • procexp64.exe
      • procmon64.exe
      • procmon.exe
      • ollydbg.exe
      • procexp.exe
      • Windbg.exe
    • Sandbox:
      • SbieDll.dll
    • Malware Filename Path:
      • sandbox
      • malware
      • sample
      • virus
      • self
    • It connects to the following URL:
      • {BLOCKED}.{BLOCKED}oup.space
    • It sends the gathered contents from the clipboard to the C&C server via email using the following credentials
    • Email: {BLOCKED}ns@{BLOCKED}oup.space
    • Password: windows9
      • Body: HawkEye Keylogger -
        Reborn v8
        Clipboard Logs
        Username \ {PC Name}




        ============={Time} Program Manager=============

        {Clipboard Contents}

  SOLUTION

Minimum Scan Engine: 9.850
FIRST VSAPI PATTERN FILE: 14.574.05
FIRST VSAPI PATTERN DATE: 19 Oct 2018
VSAPI OPR PATTERN File: 14.575.00
VSAPI OPR PATTERN Date: 20 Oct 2018

Step 1

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 2

Before doing any scans, Windows XP, Windows Vista, and Windows 7 users must disable System Restore to allow full scanning of their computers.

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.
  • %User Temp%\tmp{Random Filename}.tmp

Step 5

Restart in normal mode and scan your computer with your Trend Micro product for files detected as TROJANSPY.WIN32.GOLROTED.THAOOEAH. 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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