TROJ_CRYPT.YYSHL

May 05, 2015

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 ALIASES:

Backdoor:Win32/Simda!rfn (Microsoft); Generic-FATG!1B9B010C993C (McAfee); Backdoor.Win32.Simda.aqab (Kaspersky); Mal/Simda-V (Sophos); Trojan.Win32.Generic!BT (Sunbelt); Trojan horse Crypt4.HRP (AVG)

 PLATFORM:

Windows

 OVERALL RISK RATING:

 DAMAGE POTENTIAL:

 DISTRIBUTION POTENTIAL:

 REPORTED INFECTION:

• 
  Threat Type: Trojan
• 
  Destructiveness: No
• 
  Encrypted:
• 
  In the wild: Yes

  OVERVIEW

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.

It deletes itself after execution.

  TECHNICAL DETAILS

File Size:

640,000 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

05 May 2015

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 connects to the following possibly malicious URL:

• {BLOCKED}.6.131

It deletes itself after execution.

This report is generated via an automated analysis system.

  SOLUTION

Minimum Scan Engine:

9.750

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_CRYPT.YYSHL. 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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