Analysis by: Pearl Charlaine Espejo
ALIASES:

Trojan:Win32/Zlader.A (Microsoft); Trojan.Upatre.7044 (DrWeb); BinImage/Dropper (AhnLab-V3); Troj/Mdrop-GUS(Sophos)

 PLATFORM:

Windows

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

This Trojan 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: 85,466 bytes
File Type: Other
Memory Resident: No
Initial Samples Received Date: 19 Aug 2015

Arrival Details

This Trojan 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.

NOTES:
This is the Trend Micro detection for the encrypted file of TROJ_UPATRE.YYSNB.

  SOLUTION

Minimum Scan Engine: 9.750
FIRST VSAPI PATTERN FILE: 11.864.05
FIRST VSAPI PATTERN DATE: 19 Aug 2015
VSAPI OPR PATTERN File: 11.865.00
VSAPI OPR PATTERN Date: 20 Aug 2015

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 TROJ_UPATRENC.YYSNB. 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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