Analysis by: Henry Alarcon Jr.
ALIASES:

Trojan-UACByPass.a (McAfee), Trojan:Win32/CryptInject (Microsoft), W32/AntiAV.NIZ!tr (Fortinet)

 PLATFORM:

Windows

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

Infection Channel: Dropped by other malware

This Trojan may be dropped by other malware.

  TECHNICAL DETAILS

File Size: 4,608 bytes
File Type: DLL
Memory Resident: Yes
Initial Samples Received Date: 26 Feb 2019

Arrival Details

This Trojan may be dropped by the following malware:

Other Details

This Trojan does the following:

  • To relaunch a process as resource. ← one of component for UAC bypass using PkgMgr->DISM (DLL hijacking).

  SOLUTION

Minimum Scan Engine: 9.850
FIRST VSAPI PATTERN FILE: 14.850.04
FIRST VSAPI PATTERN DATE: 04 Mar 2019
VSAPI OPR PATTERN File: 14.851.00
VSAPI OPR PATTERN Date: 05 Mar 2019

Step 1

Before doing any scans, Windows 7, Windows 8, Windows 8.1, and Windows 10 users must disable System Restore to allow full scanning of their computers.

Step 2

Note that not all files, folders, and registry keys and entries are installed on your computer during this malware's/spyware's/grayware's execution. This may be due to incomplete installation or other operating system conditions. If you do not find the same files/folders/registry information, please proceed to the next step.

Step 3

Restart in Safe Mode

[ Learn More ]

Step 4

Restart in normal mode and scan your computer with your Trend Micro product for files detected as Trojan.Win32.ANTIAV.AB. 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.

Step 5

Scan your computer with your Trend Micro product to delete files detected as Trojan.Win32.ANTIAV.AB. 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 the following Trend Micro Support pages for more information:


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