Analysis by: Henry Alarcon Jr.
ALIASES:

AIT:Trojan.Nymeria.828 (F-Secure); Trojan.Packed2.41108 (DrWeb)

 PLATFORM:

Windows

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW

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: 447,256 bytes
File Type: AU3
Memory Resident: Yes
Initial Samples Received Date: 04 Dec 2019

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 s DLL component is injected to the following process(es):

  • explorer.exe

Other Details

This Trojan requires the following additional components to properly run:

  • {Malware File Path}\{Autoit V3 Script}.exe ← Normal file
  • {Malware File Path}\A5AA9FB480FE69E674C3A2E050C6A0E54007 ← encrypted DLL file detected as TrojanSpy.Win32.BANKRX.A
  • {Malware File Path}\D5AA9FB480FE69E674C3A2E050C6A0E54007 ← encrypted DLL file detected as TrojanSpy.Win32.BANKRX.A

  SOLUTION

Minimum Scan Engine: 9.850
FIRST VSAPI PATTERN FILE: 15.540.05
FIRST VSAPI PATTERN DATE: 05 Dec 2019
VSAPI OPR PATTERN File: 15.541.00
VSAPI OPR PATTERN Date: 06 Dec 2019

Step 1

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 2

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 3

Restart in Safe Mode

[ Learn More ]

Step 4

Scan your computer with your Trend Micro product to delete files detected as Trojan.AutoIt.NYMERIA.S. 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 5

Restart in normal mode and scan your computer with your Trend Micro product for files detected as Trojan.AutoIt.NYMERIA.S. 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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