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Subnet 77.91.71.0/24

SUBNET Active high

Why this campaign was detected

3 IPs from the same /24 subnet (77.91.71.0/24) were observed attacking our sensors within the same time window. All belong to Alferov Aleksey Aleksandrovich (AS211486). Concentrated activity from adjacent IPs is a strong indicator of a single operator or coordinated botnet.

Primary ASN

AS211486 · Alferov Aleksey Aleksandrovich

Subnet

77.91.71.0/24

Country

🇷🇺 RU

Cloud Provider

—

Member Count

3 IPs

Below average

Total Events

1855

Below average by volume

Started / Ended

2026-09-24 21:24 — ongoing

Attack Types

http:scan ssh:bruteforce ssh:connection

MITRE ATT&CK Techniques

Reconnaissance

T1595 T1595.001 T1595.002

Initial Access

T1078 T1190

Credential Access

T1110 T1110.001

Discovery

T1046

Member Actors

IP Address	Behavior	Confidence	Flags	Events	Agents	Attack Types	Hostname	Last Seen
77.91.71.91	credential_harvester	40%	1x OSINT	4722	1	ssh:bruteforcessh:connection	—	2026-10-14 01:25	evidence →
77.91.71.55	web_probe	24%		6	2	http:scan	—	2026-10-07 16:34	evidence →
77.91.71.90	opportunistic_bruter	22%		7	1	ssh:bruteforcessh:connection	—	2026-10-02 13:25	evidence →

VPN Known VPN or proxy provider

DROP ASN on Spamhaus DROP list

Nx OSINT Corroborated by N external threat feeds