H3XA — Operational Evidence

TypeMalware

External ID—

First seen2026-08-14

Last seen2026-08-14

Confidence

—

[Mosquito](https://attack.mitre.org/software/S0256) is a Win32 backdoor that has been used by [Turla](https://attack.mitre.org/groups/G0010). [Mosquito](https://attack.mitre.org/software/S0256) is made up of three parts: the installer, the launcher, and the backdoor. The main backdoor is called CommanderDLL and is launched by the loader program. (Citation: ESET Turla Mosquito Jan 2018)

Labels

malware

18 recorded

Relationships

uses

to Component Object Model Hijacking

Technique

uses

to Encrypted/Encoded File

Technique

uses

to File Deletion

Technique

uses

to Fileless Storage

Technique

uses

to Ingress Tool Transfer

Technique

uses

to Modify Registry

Technique

uses

Technique

uses

Technique

uses

to Process Discovery

Technique

uses

to Registry Run Keys / Startup Folder

Technique

uses

Technique

uses

to Security Software Discovery

Technique

uses

to Symmetric Cryptography

Technique

uses

to System Network Configuration Discovery

Technique

uses

to System Owner/User Discovery

Technique

uses

to Windows Command Shell

Technique

uses

to Windows Management Instrumentation

Technique

uses

from Turla

Group

3 external

References

mitre-attack

S0256

Mosquito

—

ESET Turla Mosquito Jan 2018

https://www.welivesecurity.com/wp-content/uploads/2018/01/ESET_Turla_Mosquito.pdf