Analysis by: Ryan Paolo Maglaque
ALIASES:

Trojan.Win64.Rozena.rpmg(Kaspersky);W64/Rozena.F!tr(Fortinet);Win64/Rozena.F.gen(Eset-NOD32)

 PLATFORM:

Windows

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

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

This Trojan 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.

  TECHNICAL DETAILS

File Size: 12,800 bytes
File Type: EXE
Memory Resident: No
Initial Samples Received Date: 09 Apr 2017
Payload: Connects to URLs/IPs

Arrival Details

This Trojan 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 Trojan does the following:

  • Connects to http://{BLOCKED}.{BLOCKED}.1.1:8443/ZljtdXJbL5hcZV1nBIy3VwOv9kJ2zkwa-0hoaxAfs2WMYM2ETR7RegWmPmC4A-NpQweHVGoyOBnglOZKxJz7D-lsmh3j7BGcwc9LWJA3RIYYe6ctAJ to download a file and execute it in memory

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

  SOLUTION

Minimum Scan Engine: 9.850
FIRST VSAPI PATTERN FILE: 13.394.06
FIRST VSAPI PATTERN DATE: 09 May 2017
VSAPI OPR PATTERN File: 13.395.00
VSAPI OPR PATTERN Date: 10 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

Scan your computer with your Trend Micro product to delete files detected as TROJ64_ROZENA.BC. 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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