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INF_PUSHBOT.A

April 05, 2016
 Analysis by: Michael Jay Villanueva
 ALIASES:

VirTool:INF/Autorun.gen!B (Microsoft), Trojan.Win32.AutoRun.aqc (Kaspersky), Mal/AutoInf-C (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 may be dropped by other malware.

It automatically executes files when a user opens a drive.

  TECHNICAL DETAILS

File Size:

257 bytes

File Type:

INF

Memory Resident:

No

Initial Samples Received Date:

24 Mar 2016

Arrival Details

This Trojan may be dropped by the following malware:

  • WORM_PUSHBOT

Propagation

The said .INF file contains the following strings:

[autorun]
open=TTHDHGC\DFG-2352-66235-2352322-634621321-6662355\364855.exe
icon=%System%\SHELL32.dll,4
action=Open folder to view files
shell\open\command=TTHDHGC\DFG-2352-66235-2352322-634621321-6662355\364855.exe
shell\open\default=1

(Note: %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.)

Other Details

This Trojan automatically executes the following files when a user opens a drive:

  • {drive letter}:\TTHDHGC\DFG-2352-66235-2352322-634621321-6662355\364855.exe

  SOLUTION

Minimum Scan Engine:

9.800

FIRST VSAPI PATTERN FILE:

12.440.05

FIRST VSAPI PATTERN DATE:

01 Apr 2016

VSAPI OPR PATTERN File:

12.441.00

VSAPI OPR PATTERN Date:

02 Apr 2016

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

Search and delete AUTORUN.INF files created by INF_PUSHBOT.A that contain these strings

[ Learn More ]
  • [autorun]
  • open=TTHDHGC\DFG-2352-66235-2352322-634621321-6662355\364855.exe
  • icon=%System%\SHELL32.dll,4
  • action=Open folder to view files
  • shell\open\command=TTHDHGC\DFG-2352-66235-2352322-634621321-6662355\364855.exe
  • shell\open\default=1

Step 3

Scan your computer with your Trend Micro product to delete files detected as INF_PUSHBOT.A. 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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