H3XA — Operational Evidence

TypeMalware

External ID—

First seen2026-08-14

Last seen2026-08-14

Confidence

—

[FlawedAmmyy](https://attack.mitre.org/software/S0381) is a remote access tool (RAT) that was first seen in early 2016. The code for [FlawedAmmyy](https://attack.mitre.org/software/S0381) was based on leaked source code for a version of Ammyy Admin, a remote access software.(Citation: Proofpoint TA505 Mar 2018)

Labels

malware

24 recorded

Relationships

uses

from FIN6

Group

uses

to Clipboard Data

Technique

uses

to Data from Local System

Technique

uses

to Data Obfuscation

Technique

uses

to Exfiltration Over C2 Channel

Technique

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to File Deletion

Technique

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to Ingress Tool Transfer

Technique

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to Input Capture

Technique

uses

Technique

uses

to Local Groups

Technique

uses

Technique

uses

to Peripheral Device Discovery

Technique

uses

Technique

uses

to Registry Run Keys / Startup Folder

Technique

uses

Technique

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to Screen Capture

Technique

uses

to Security Software Discovery

Technique

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to Symmetric Cryptography

Technique

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to System Information Discovery

Technique

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to System Owner/User Discovery

Technique

uses

to Web Protocols

Technique

uses

to Windows Command Shell

Technique

uses

to Windows Management Instrumentation

Technique

uses

from TA505

Group

2 external

References

mitre-attack

S0381

Proofpoint TA505 Mar 2018

https://www.proofpoint.com/us/threat-insight/post/leaked-ammyy-admin-source-code-turned-malware