Analysis by: Kiyoshi Obuchi

ALIASES:

Backdoor.Win32.Androm.qekc (Kaspersky); W32/Injector.DZNI!tr (Fortinet)

 PLATFORM:

Windows

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

  • Threat Type: Trojan Spy

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

This Trojan Spy arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

However, as of this writing, the said sites are inaccessible. It deletes itself after execution.

  TECHNICAL DETAILS

Tamaño del archivo 552,960 bytes
Tipo de archivo EXE
Fecha de recepción de las muestras iniciales 31 Jul 2018

Arrival Details

This Trojan Spy 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:

  • %Application Data%\{Random Characters}\{Random Characters}.exe

(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 drops the following files:

  • %Application Data%\{Random Characters}\{Random Characters}.lck

(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.)

Other System Modifications

This Trojan Spy adds the following registry keys:

HKEY_CURRENT_USER\{Hex Values}

It adds the following registry entries:

HKEY_CURRENT_USER\{Hex Values}
{Random Characters} = "%Application Data%\{Random Characters}\{Random Characters}.exe"

Other Details

This Trojan Spy connects to the following possibly malicious URL:

  • http://{BLOCKED}com.ga/chika/fre.php

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

It deletes itself after execution.