Analysis by: Arvin Roi Macaraeg
ALIASES:

Trojan:Win32/Occamy.C(Microsoft); Win32:Trojan-gen(Avast); Backdoor.MSIL.Proyecto.gen(Kaspersky)

 PLATFORM:

Windows

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

  • Threat Type: Backdoor

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

Infection Channel: Dropped by other malware, Downloaded from the Internet

This Backdoor arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

It does not have any propagation routine.

It does not have any backdoor routine.

It does not have any information-stealing capability.

This is the Trend Micro detection for files that exhibit certain behaviors.

  TECHNICAL DETAILS

File Size: 185,856 bytes
File Type: EXE
Memory Resident: Yes
Initial Samples Received Date: 26 Jul 2019

Arrival Details

This Backdoor arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Propagation

This Backdoor does not have any propagation routine.

Backdoor Routine

This Backdoor does not have any backdoor routine.

Rootkit Capabilities

This Backdoor does not have rootkit capabilities.

Information Theft

This Backdoor does not have any information-stealing capability.

Other Details

This is the Trend Micro detection for:

  • Damaged samples of Backdoor.MSIL.NANOCORE variants.
  • Samples detected by this pattern contains code errors, thus they fail to exhibit their intended routines.

NOTES:

It does not exploit any vulnerability.

  SOLUTION

Minimum Scan Engine: 9.850
FIRST VSAPI PATTERN FILE: 15.258.04
FIRST VSAPI PATTERN DATE: 26 Jul 2019
VSAPI OPR PATTERN File: 15.259.00
VSAPI OPR PATTERN Date: 27 Jul 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

Scan your computer with your Trend Micro product to delete files detected as Backdoor.MSIL.NANOCORE.DAM. 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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