H3XA — Operational Evidence

TypeMalware

External ID—

First seen2026-08-14

Last seen2026-08-14

Confidence

—

[Okrum](https://attack.mitre.org/software/S0439) is a Windows backdoor that has been seen in use since December 2016 with strong links to [Ke3chang](https://attack.mitre.org/groups/G0004).(Citation: ESET Okrum July 2019)

Labels

malware

35 recorded

Relationships

uses

from Ke3chang

Group

uses

to Archive via Custom Method

Technique

uses

to Archive via Utility

Technique

uses

to Cached Domain Credentials

Technique

uses

to Data Obfuscation

Technique

uses

to Deobfuscate/Decode Files or Information

Technique

uses

to Exfiltration Over C2 Channel

Technique

uses

to External Proxy

Technique

uses

to File and Directory Discovery

Technique

uses

to File Deletion

Technique

uses

to Hidden Files and Directories

Technique

uses

to Ingress Tool Transfer

Technique

uses

to Keylogging

Technique

uses

to LSASS Memory

Technique

uses

to Masquerade Task or Service

Technique

uses

to Protocol or Service Impersonation

Technique

uses

to Registry Run Keys / Startup Folder

Technique

uses

to Scheduled Task

Technique

uses

to Service Execution

Technique

uses

to Shortcut Modification

Technique

uses

to Standard Encoding

Technique

uses

to Steganography

Technique

uses

to Symmetric Cryptography

Technique

uses

to System Checks

Technique

uses

to System Information Discovery

Technique

uses

to System Network Configuration Discovery

Technique

uses

to System Network Connections Discovery

Technique

uses

to System Owner/User Discovery

Technique

uses

to System Time Discovery

Technique

uses

to Time Based Checks

Technique

uses

to Token Impersonation/Theft

Technique

uses

to User Activity Based Checks

Technique

uses

to Web Protocols

Technique

uses

to Windows Command Shell

Technique

uses

to Windows Service

Technique

2 external

References

mitre-attack

S0439

open

ESET Okrum July 2019

https://www.welivesecurity.com/wp-content/uploads/2019/07/ESET_Okrum_and_Ketrican.pdf

open