Analysis by: Augusto II Remillano
 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

File Size: 120,969 bytes
File Type: EXE
Memory Resident: Yes
Initial Samples Received Date: 07 Aug 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 files:

  • %User Temp%\Dairyman.kVW
  • %User Temp%\acrostic.dll
  • %User Temp%\ns{Random alphanumeric characters}.tmp\System.dll
  • %User Temp%\{Random numbers}.bat

(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.)

Other System Modifications

This Trojan Spy adds the following registry entries:

HKEY_CURRENT_USER\Software\WinRAR
HWID = "{GUID}"

HKEY_CURRENT_USER\Software\WinRAR
Client Hash = "{Hex values}"

Other Details

This Trojan Spy connects to the following possibly malicious URL:

  • http://{BLOCKED}nlab.com.tw/panel/gate.php

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

It deletes itself after execution.