Analysis by: Johnlery Triunfante
ALIASES:

Trojan.Exploit.ANXA (Bitdefender); Python/Exploit.Agent.I trojan (NOD32)

 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 arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites. It arrives as a component bundled with malware/grayware packages.

It takes advantage of certain vulnerabilities.

  TECHNICAL DETAILS

File Size: 24,079 bytes
File Type: PY
Memory Resident: No
Initial Samples Received Date: 27 Jul 2017
Payload: Exploits vulnerability

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 arrives as a component bundled with malware/grayware packages.

Other Details

This Trojan does the following:

  • It needs the following arguments to execute properly:
    • {Malware Directory}\{Malware Name}.py {Target IP} {Shellcode file} {Number}
  • It checks for the target's operating system if the target is vulnerable:
    • Windows 10 with version below or equal 1607
    • Windows 8
    • Windows Server 2012
  • Its exploit supports 64-bit target only.

It takes advantage of the following vulnerabilities:

  SOLUTION

Minimum Scan Engine: 9.850
FIRST VSAPI PATTERN FILE: 14.128.05
FIRST VSAPI PATTERN DATE: 14 Mar 2018
VSAPI OPR PATTERN File: 14.129.00
VSAPI OPR PATTERN Date: 15 Mar 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_PYEB.B. 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:

Step 4

Download and apply this security patch Refrain from using these products until the appropriate patches have been installed. Trend Micro advises users to download critical patches upon release by vendors.


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