TA577

Overview

TA577 is an initial access broker (IAB) that has distributed QakBot and Pikabot, and was among the first observed groups distributing Latrodectus in 2023.

Naming & attribution

It uses 6 documented ATT&CK techniques — more than 17% of the 174 groups tracked here.

Distinctive techniques

Techniques this group uses that are rare across the other 173 tracked groups — these carry more signal than the near-universal ones.

• T1027.009 Embedded Payloads — used by 3 of 174 groups

Closest groups by technique overlap

Computed from shared ATT&CK techniques. Overlap is not attribution — distinct actors converge on the same tradecraft — but a high share is a useful pivot.

• Evilnum — 3 shared techniques (21% overlap)
• Machete — 3 shared techniques (21% overlap)
• LazyScripter — 4 shared techniques (18% overlap)
• Molerats — 3 shared techniques (16% overlap)
• WIRTE — 4 shared techniques (14% overlap)
• Saint Bear Russia — 3 shared techniques (14% overlap)

Capabilities

• Custom malware/implant development — ATT&CK: 3 attributed custom malware families

TTPs — 6 techniques across 4 tactics

Tools & malware (3)

Pikabot · QakBot · Latrodectus

Reporting (1)

• Latrodectus: This Spider Bytes Like Ice — Proofpoint Threat Research and Team Cymru S2 Threat Research