Analysis by: Mark Joseph Manahan
ALIASES:

Troj/AutoIt-AFK (Sophos) ,Trojan horse Autoit_c.AIOS (AVG) ,W32/Autoit.ADN!tr (Fortinet) ,Worm.Win32.AutoIt (Ikarus) ,Trojan.Win32.Inject.jrqg (Kaspersky) ,Trojan:AutoIt/Neurevt.A (Microsoft) ,[.au3]:PWS-ZBot.gen.aul (McAfee) ,a variant of Win32/Injector.Autoit.AIE trojan, a variant of Win32/Injector.Autoit.AIE trojan, a variant of Win32/Injector.Autoit.AIE trojan (Eset) ,Trojan.Win32.Generic!BT (Sunbelt)

 PLATFORM:

Windows 2000, Windows Server 2003, Windows XP (32-bit, 64-bit), Windows Vista (32-bit, 64-bit), Windows 7 (32-bit, 64-bit)

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW

Infection Channel: Dropped by other malware

This Trojan may be dropped by other malware.

It connects to certain websites to send and receive information. However, as of this writing, the said sites are inaccessible.

  TECHNICAL DETAILS

File Size: 391,199 bytes
File Type: EXE
Memory Resident: Yes
Initial Samples Received Date: 25 Mar 2014
Payload: Connects to URLs/IPs

Arrival Details

This Trojan may be dropped by other malware.

Other Details

This Trojan connects to the following website to send and receive information:

  • {BLOCKED}.{BLOCKED}o.org:8090

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

NOTES:
This malware used the infected machine as an e-mail proxy for sending mass spam mails retrieve from server.

  SOLUTION

Minimum Scan Engine: 9.700
FIRST VSAPI PATTERN FILE: 10.686.05
FIRST VSAPI PATTERN DATE: 25 Mar 2014

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

Identify and terminate files detected as TROJ_LETHIC.WES

[ Learn More ]
  1. Windows Task Manager may not display all running processes. In this case, please use a third-party process viewer, preferably Process Explorer, to terminate the malware/grayware/spyware file. You may download the said tool here.
  2. If the detected file is displayed in either Windows Task Manager or Process Explorer but you cannot delete it, restart your computer in safe mode. To do this, refer to this link for the complete steps.
  3. If the detected file is not displayed in either Windows Task Manager or Process Explorer, continue doing the next steps.

Step 3

Scan your computer with your Trend Micro product to delete files detected as TROJ_LETHIC.WES. 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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