software

Small Sieve

activeentity:software

[Small Sieve](https://attack.mitre.org/software/S1035) is a Telegram Bot API-based Python backdoor that has been distributed using a Nullsoft Scriptable Install System (NSIS) Installer; it has been used by [MuddyWater](https://attack.mitre.org/groups/G0069) since at least January 2022.(Citation: DHS CISA AA22-055A MuddyWater February 2022)(Citation: NCSC GCHQ Small Sieve Jan 2022)

Curated · btcintel

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Facts

id: small-sieve
kind: software
status: active
aliases: GRAMDOOR
jurisdictions: —
claims naming it: 0 · 0 attributions · 1 relations · 0 events

Identifiers

attack S1035via mitre-attack

Relations

MITRE ATT&CK Enterpriserecords thatMuddyWaterusesSmall Sieve
fetch —sha256 dc1639caa5501d72
rel_121btcintel:relations:121@v1 sha256:7c59765648430f54
confidenceauthority data · 60

Events

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Claims naming this entity

computedno current claim names this entity

Subjects0 subjects carry a claim naming this entity · a sample

computedno subject carries a claim naming this entity

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