Author: Michael Jhon Ofiaza   

 PLATFORM:

Windows

 OVER ALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:
 INFORMATION EXPOSURE
Low
Medium
High
Critical

  • Threat Type:
    Trojan

  • Destructiveness:
    No

  • Encrypted:
    No

  • In the wild:
    Yes

  OVERVIEW

INFECTION CHANNEL: Downloaded from the Internet

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.

  TECHNICAL DETAILS

File size: 7,768 bytes
File type: Other
Memory resident: Yes
INITIAL SAMPLES RECEIVED DATE: 25 July 2018
PAYLOAD: Connects to URLs/IPs, Downloads files

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.

Installation

This Trojan adds the following processes:

  • %System root%system32\dllhost.exe

It adds the following mutexes to ensure that only one of its copies runs at any one time:

  • ast-{56AD2219-B407-643f-AEEA-9906EF156F66}

Other Details

This Trojan does the following:

  • Injects the downloaded file to the created dllhost.exe
  • It connects to the following URL to download file:
    • http://{BLOCKED}.{BLOCKED}.72.223:8080/git/wiki.asp?id=519358d46ad51d9628cbe9059a502b67
    • http://{BLOCKED}.{BLOCKED}.72.223:8080/git/glfw.wasm
    • http://{BLOCKED}.{BLOCKED}.72.223:8080/rt/flolroam9415u2es53ogc176ok.wasm

  SOLUTION

Minimum scan engine: 9.850
First VSAPI Pattern File: 14.404.03
First VSAPI Pattern Release Date: 26 July 2018
VSAPI OPR PATTERN-VERSION: 14.405.00
VSAPI OPR PATTERN DATE: 27 July 2018

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

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

Scan your computer with your Trend Micro product to delete files detected as TROJ_DLOADR.AUSUMP. 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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