Analysis by: Noel Anthony Llimos
 Modified by: Jayvee Mark Villaroman
ALIASES:

HackTool.Win32.Remoxec.c (KASPERSKY), VirTool:Win32/RemoteExec (MICROSOFT)

 PLATFORM:

Windows

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

  • Threat Type: Hacking Tool

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

Infection Channel: Dropped by other malware

This Hacking Tool 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: 56,320 bytes
File Type: EXE
File Compression: UPX
Memory Resident: No
Initial Samples Received Date: 22 Dec 2022

Arrival Details

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

Other Details

This Hacking Tool does the following:

  • It uses Windows Service Control Manager to start its service - RemComSvc
  • Creates three pipes and connect to them
    • RemCom_stdout
    • RemCom_stdin
    • RemCom_stderr
  • Creates a main pipe used for its communication which allows arbitrary command execution from a malicious user
    • RemCom_Communication
  • Accepts a command line parameter used for file and service creation
  • It can execute processes remotely from a malicious actor.
  • It can send files to remote systems.
  • It can receive files from remote systems.
  • It allows execution of remote shell commands.
  • It can impersonate user tokens for privilege elevation and as a replacement for "Runas" command
  • It should be started as a service to proceed with its routine.

  SOLUTION

Minimum Scan Engine: 9.800
SSAPI PATTERN File: 2.491.00
SSAPI PATTERN Date: 24 Feb 2022

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 HackTool.Win32.RAdmin.GB. 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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