Analysis by: Cris Nowell Pantanilla

ALIASES:

Trojan-Downloader.Win32.Inject.i (Kaspersky)

 PLATFORM:

Windows

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW

This Trojan arrives as an attachment to email messages spammed by other malware/grayware or malicious users.

  TECHNICAL DETAILS

File Size: 300,544 bytes
File Type: EXE
Memory Resident: Yes
Initial Samples Received Date: 11 Jul 2016

Arrival Details

This Trojan arrives as an attachment to email messages spammed by other malware/grayware or malicious users.

Installation

This Trojan adds the following possibly malicious files or file components:

  • %User Temp%\ftd03622.tmp
  • %User Temp%\ftd08096.tmp

(Note: %User Temp% is the user's temporary folder, where it usually is C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local\Temp on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.)

Other System Modifications

This Trojan adds the following registry entries:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\ftd08096.tmp

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\ftd08096.tmp
Type = 1

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\ftd08096.tmp
Start = 4

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\ftd08096.tmp
ErrorControl = 1

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\ftd08096.tmp
ImagePath = %User Temp%\ftd08096.tmp

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\ftd08096.tmp
DisplayName = "ftd08096.tmp"

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\ftd08096.tmp
DeleteFlag = 1

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\ftd08096.tmp\Security

  SOLUTION

Minimum Scan Engine: 9.800

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

Restart in Safe Mode

[ Learn More ]

Step 3

Delete this registry key

[ Learn More ]

Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry. Before you could do this, you must restart in Safe Mode. For instructions on how to do this, you may refer to this page If the preceding step requires you to restart in safe mode, you may proceed to edit the system registry.

  • In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services
    • ftd08096.tmp

Step 4

Search and delete this file

[ Learn More ]
There may be some files that are hidden. Please make sure you check the Search Hidden Files and Folders checkbox in the "More advanced options" option to include all hidden files and folders in the search result.
%User Temp%\ftd03622.tmp
%User Temp%\ftd08096.tmp

Step 5

Restart in normal mode and scan your computer with your Trend Micro product for files detected as TROJ_HANCITOR.AA. 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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