MalwareUsed by 1 actor

FLIPSIDE

FLIPSIDE is a simple tool similar to Plink that is used by FIN5 to maintain access to victims. (Citation: Mandiant FIN5 GrrCON Oct 2016)

For your environment

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THREAT ACTORS

Groups observed using it

1 distinct threat actor attributed by public researchers. Open in Mallory to see the full evidence chain and overlapping campaigns.

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FIN5

FIN5 maintains access to victim environments by using FLIPSIDE to create a proxy for a backup RDP tunnel.

via mitre attack websiteattack.mitre.org

MITRE ATT&CK

Techniques & procedures

2 distinct techniques documented for this family, organized by ATT&CK tactic.

Command and Control

2 techniques

T1090.003Multi-hop ProxyEvidence1

TacticCommand and Control

APT28 used other victims as proxies to relay command traffic, for instance using a compromised Georgian military email server as a hop point to NATO victims.

T1572Protocol TunnelingEvidence1

TacticCommand and Control

ACTIVITY FEED

Recent activity

2 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.

2 SOURCESView more in app

mitre attack websiteNews

Mar 8, 2018

Proxy: External Proxy, Sub-technique T1090.002 - Enterprise | MITRE ATT&CK®

Tool used to create a proxy for a backup RDP tunnel to maintain access in victim environments.

mitre attackNews

Jan 25, 2026

Proxy: External Proxy, Sub-technique T1090.002 - Enterprise | MITRE ATT&CK®

Tool used to maintain access by creating a proxy that supports a backup RDP tunnel (persistence/alternate access path).

What this page doesn’t show

The version that knows your environment.

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IOC matching

Match every observed IP, domain, and hash against your live telemetry.

Threat actor attribution1

Named campaigns wielding this family, with evidence pinned to each claim.

Exploited vulnerabilities

CVEs this family uses for access and lateral movement.

Detection signatures

YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.

MITRE ATT&CK mapping2

Every documented technique, ranked by evidence weight.

Researcher chatter

Reddit, Mastodon, and CTI community discussion around this family.