HyperStack can use default credentials to connect to IPC$ shares on remote machines.2
tool
HyperStack S0537
- Type
- malware
- Platform
- Windows
- Created
- 2 December 2020
- Last modified
- 20 January 2026
HyperStack is a RPC-based backdoor used by Turla since at least 2018. HyperStack has similarities to other backdoors used by Turla including Carbon.[1]
6
Techniques29th pct
8
TacticsTop 20%
1
Threat groupunranked
0
CampaignsNone recorded
Enterprise ATT&CK only. Any Mobile or ICS rows on the same ATT&CK page are not carried.
MITRE reference S0537
HyperStack can enumerate all account names on a remote share.3
HyperStack can use Windows API's ConnectNamedPipe and WNetAddConnection2 to detect incoming connections and connect to remote shares.4
HyperStack can add the name of its communication pipe to HKLM\SYSTEM\\CurrentControlSet\\Services\\lanmanserver\\parameters\NullSessionPipes.5
HyperStack can connect to the IPC$ share on remote machines.6
HyperStack has used RSA encryption for C2 communications.7
Standing S0537
Reach is how much of ATT&CK this tool touches. Coverage is how well defended each thing it does is, as a median per technique rather than a total — a total would just restate the reach. Each figure is ranked against all 825 ATT&CK software entries only where that population actually spreads. Where most of the population shares one value, a percentile would rank the tie instead of the entity, so the raw value is shown and no rank is claimed.
Reach
Techniques629th pct
29th percentile · 71% of 825 ATT&CK software entries have more Enterprise techniques.
Tactics8Top 20%
80th percentile · 80% of 825 ATT&CK software entries have this many tactics spanned or fewer.
Threat group161% tie · 22 values
61% of the population shares a single value across only 22 distinct values, so a percentile here would rank the tie, not the entity.
Campaigns085% tie · 8 values
85% of the population shares a single value across only 8 distinct values, so a percentile here would rank the tie, not the entity.
Coverage
Rules / technique11medBottom 18%
18th percentile · 82% of 825 ATT&CK software entries have more detection rules per technique.
Tests / technique5med
Detection coverage S0537
230 distinct rules cover the 6 techniques recorded for this tool. 128 Sigma · 102 Splunk.
5 covered by at least one rule1 with no coverage230 distinct rules in total
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© 2026 The MITRE Corporation. ATT&CK® and D3FEND™ data reproduced with permission. SigmaHQ detection rules licensed under DRL 1.1. attack.mitre.org · d3fend.mitre.org · CAR analytics licensed under Apache 2.0 · car.mitre.org