defection.io

malware

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]

Techniques29th pct

TacticsTop 20%

Threat groupunranked

CampaignsNone recorded

Enterprise ATT&CK only. Any Mobile or ICS rows on the same ATT&CK page are not carried.

defection.io

malware

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]

Techniques29th pct

TacticsTop 20%

Threat groupunranked

CampaignsNone recorded

Enterprise ATT&CK only. Any Mobile or ICS rows on the same ATT&CK page are not carried.

HyperStack MITRE reference S0537

Default Accounts T1078.001 ↗

HyperStack can use default credentials to connect to IPC$ shares on remote machines.2

Initial Access · Persistence · Privilege Escalation · Stealth8 detection rules

Local Account T1087.001 ↗

HyperStack can enumerate all account names on a remote share.3

Discovery27 detection rules

Native API T1106 ↗

HyperStack can use Windows API's ConnectNamedPipe and WNetAddConnection2 to detect incoming connections and connect to remote shares.4

Execution14 detection rules

Modify Registry T1112 ↗

HyperStack can add the name of its communication pipe to HKLM\SYSTEM\\CurrentControlSet\\Services\\lanmanserver\\parameters\NullSessionPipes.5

Persistence · Defense Impairment177 detection rules

Inter-Process Communication T1559 ↗

HyperStack can connect to the IPC$ share on remote machines.6

Execution6 detection rules

Symmetric Cryptography T1573.001 ↗

HyperStack has used RSA encryption for C2 communications.7

Command and Controlno detection rules

Standing S0537

Reach is how much of ATT&CK this malware 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 19%

19th percentile · 81% of 825 ATT&CK software entries have more detection rules per technique.

Tests / technique6med55th pct

55th percentile · 55% of 825 ATT&CK software entries have this many atomic tests per technique or fewer.

Data comps / technique3med54% tie · 11 values

54% of the population shares a single value across only 11 distinct values, so a percentile here would rank the tie, not the entity.

Mitigations / technique1.5med65th pct

65th percentile · 65% of 825 ATT&CK software entries have this many mitigations per technique or fewer.

5 of 8 axes carry an honest rank on this page. Coverage medians are taken across this malware’s 6 Enterprise techniques.

Range

Technique Campaign use over its cumulative rule count.

Campaigns · 0Sigma rules (cumulative) · 130Splunk ESCU (cumulative) · 102