H3XA — Operational Evidence

TypeMalware

External ID—

First seen2026-08-14

Last seen2026-08-14

Confidence

—

[RCSession](https://attack.mitre.org/software/S0662) is a backdoor written in C++ that has been in use since at least 2018 by [Mustang Panda](https://attack.mitre.org/groups/G0129) and by [Threat Group-3390](https://attack.mitre.org/groups/G0027) (Type II Backdoor).(Citation: Secureworks BRONZE PRESIDENT December 2019)(Citation: Trend Micro Iron Tiger April 2021)(Citation: Trend Micro DRBControl February 2020)

Labels

malware

24 recorded

Relationships

uses

from Mustang Panda

Group

uses

to Bypass User Account Control

Technique

uses

Technique

uses

to Data from Local System

Technique

uses

to DLL

Technique

uses

to Encrypted Channel

Technique

uses

to File Deletion

Technique

uses

to Fileless Storage

Technique

uses

to Ingress Tool Transfer

Technique

uses

Technique

uses

to Masquerading

Technique

uses

to Modify Registry

Technique

uses

Technique

uses

Technique

uses

to Non-Application Layer Protocol

Technique

uses

to Process Discovery

Technique

uses

to Process Hollowing

Technique

uses

to Registry Run Keys / Startup Folder

Technique

uses

to Screen Capture

Technique

uses

to System Information Discovery

Technique

uses

to System Owner/User Discovery

Technique

uses

to Web Protocols

Technique

uses

to Windows Command Shell

Technique

uses

from Threat Group-3390

Group

4 external

References

mitre-attack

S0662

Secureworks BRONZE PRESIDENT December 2019

https://www.secureworks.com/research/bronze-president-targets-ngos

Trend Micro Iron Tiger April 2021

https://www.trendmicro.com/en_us/research/21/d/iron-tiger-apt-updates-toolkit-with-evolved-sysupdate-malware-va.html

Trend Micro DRBControl February 2020

https://documents.trendmicro.com/assets/white_papers/wp-uncovering-DRBcontrol.pdf