Analysis by: Patrick Angelo Roderno

ALIASES:

HTML/Infected.WebPage.Gen (ANTIVIR); Heur.HTML.MalIFrame (v) (SUNBELT)

 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: Downloaded from the Internet, Dropped by other malware

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. It may be hosted on a website and run when a user accesses the said website.

This is the Trend Micro detection for files that contain malicious IFRAME tags. However, as of this writing, the said sites are inaccessible.

  TECHNICAL DETAILS

File Size: 1,039 bytes
File Type: HTML, HTM
Memory Resident: No
Initial Samples Received Date: 03 Sep 2019
Payload: Connects to URLs/IPs

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.

It may be hosted on a website and run when a user accesses the said website.

Other Details

This is the Trend Micro detection for files that contain malicious IFRAME tags.

It does the following:

  • It includes an IFRAME tags that redirects the user to the following URL:
    • http://{BLOCKED}.{BLOCKED}.33.233/?MTY5MjA4&AeJcEt&KITk=heartfelt&BNpfGKRW=constitution&DSvLqs=blackmail&zrZxwmvs=difference&PGoSQ=referred&FMzSGAVh=already&KwHAmgR=referred&Pspvy=wrapped&pTna=wrapped&HgeRNta=strategy&bcApUrBjY=constitution&GCeYR=wrapped&XDxnxL=vest&t4gdfgf4=YDVeyihPReAM1mdhUBAsS_66o30jczEOagJ-H-kGOZAxCrZOcHOU_0Az0mbYkQPshg1TH4GI&naeueW=referred&ffhd3s=xXnQMvWabRXQDJ3EKvPcT6NCMVHRG0CL2YedmrHZefjafVWkzrvFTF_1ozKATQSG6_VtdfJ&XWNuj=professional&mTLsLWNTk5NDI2
    • 1.htm -> detected as Trojan.VBS.CVE20188174.AMS
    • 2.htm -> detected as Trojan.VBS.CVE20146332.B
  • It includes an embedded object:
    • 1.swf -> detected as Trojan.SWF.RIGEK.AC

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

  SOLUTION

Minimum Scan Engine: 9.850
FIRST VSAPI PATTERN FILE: 15.342.04
FIRST VSAPI PATTERN DATE: 03 Sep 2019
VSAPI OPR PATTERN File: 15.343.00
VSAPI OPR PATTERN Date: 04 Sep 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

Close all opened browser windows

Step 3

Scan your computer with your Trend Micro product to delete files detected as Trojan.HTML.IFRAME.ASUQK. 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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