H3XA — Operational Evidence

TypeMalware

External ID—

First seen2026-08-14

Last seen2026-08-14

Confidence

—

[Squirrelwaffle](https://attack.mitre.org/software/S1030) is a loader that was first seen in September 2021. It has been used in spam email campaigns to deliver additional malware such as [Cobalt Strike](https://attack.mitre.org/software/S0154) and the [QakBot](https://attack.mitre.org/software/S0650) banking trojan.(Citation: ZScaler Squirrelwaffle Sep 2021)(Citation: Netskope Squirrelwaffle Oct 2021)

Labels

malware

21 recorded

Relationships

uses

to Archive via Custom Method

Technique

uses

to Deobfuscate/Decode Files or Information

Technique

uses

to Encrypted/Encoded File

Technique

uses

to Exfiltration Over C2 Channel

Technique

uses

to Ingress Tool Transfer

Technique

uses

to Malicious File

Technique

uses

to Malicious Link

Technique

uses

Technique

uses

Technique

uses

Technique

uses

to Software Packing

Technique

uses

to Spearphishing Attachment

Technique

uses

to Spearphishing Link

Technique

uses

to Standard Encoding

Technique

uses

to System Information Discovery

Technique

uses

to System Network Configuration Discovery

Technique

uses

to System Owner/User Discovery

Technique

uses

to Virtualization/Sandbox Evasion

Technique

uses

to Visual Basic

Technique

uses

to Web Protocols

Technique

uses

to Windows Command Shell

Technique

3 external

References

mitre-attack

S1030

ZScaler Squirrelwaffle Sep 2021

https://www.zscaler.com/blogs/security-research/squirrelwaffle-new-loader-delivering-cobalt-strike

Netskope Squirrelwaffle Oct 2021

https://www.netskope.com/blog/squirrelwaffle-new-malware-loader-delivering-cobalt-strike-and-qakbot