HeartCrypt is a packer-as-a-service (PaaS) used to protect malware that has been available since at least 2024. HeartCrypt has been used to pack a variety of malware including Lumma Stealer, Remcos, and Rhadamanthys. In the HeartCrypt PaaS model, customers submit malware via private messaging services and it is then packed and returned by the operator as a new binary.[1]
11
Techniques51st pct
5
Tactics41st pct
1
Threat groupunranked
0
CampaignsNone recorded
Enterprise ATT&CK only. Any Mobile or ICS rows on the same ATT&CK page are not carried.
For .NET payloads, HeartCrypt can use process hollowing to inject into processes spawned by csc.exe or AppLaunch.exe.8
Privilege Escalation · Stealth6 detection rules
Standing S9018
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
Techniques1151st pct
51st percentile · 51% of 825 ATT&CK software entries have this many Enterprise techniques or fewer.
Tactics541st pct
41st percentile · 59% of 825 ATT&CK software entries have more tactics spanned.
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 / technique4medBottom 4%
4th percentile · 96% of 825 ATT&CK software entries have more detection rules per technique.
Tests / technique4med
HeartCrypt detections S9018
160 distinct rules cover the 11 techniques recorded for this malware. 130 Sigma · 30 Splunk.
11 covered by at least one rule160 distinct rules in total
Showing 1-50 of 100+ rules
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MITRE ATT&CK
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Detects when AppLocker "Audit only" enforcement mode reports that an Application, DLL, Script, MSI, or Packaged-App would have been blocked if AppLocker "Enforce rules" enforcement mode was enabled.
The following analytic detects the use of CertUtil.exe with the 'decode' argument, which may indicate an attempt to decode a previously encoded file, potentially containing malicious payloads. (...)
Victor Sergeev, Daniil Yugoslavskiy, Gleb Sukhodolskiy, Timur Zinniatullin, oscd.community, Tim Shelton, frack113 (split)
2019-10-25
2025-10-22
9df5f547-c86a-433e-b533-f2794357e242
Splunk
The following analytic detects the use of `cmd.exe /c` to execute commands, a technique often employed by adversaries and malware to run batch commands or invoke other shells like PowerShell. (...)
The following analytic identifies the use of named-pipe impersonation for privilege escalation, commonly associated with Cobalt Strike and similar frameworks. (...)
Victor Sergeev, Daniil Yugoslavskiy, Gleb Sukhodolskiy, Timur Zinniatullin, oscd.community, Tim Shelton, frack113 (split)
2019-10-25
2025-10-22
cbf93e5d-ca6c-4722-8bea-e9119007c248
Splunk
The following analytic detects executions of cmd.exe spawned by processes that are commonly abused by attackers and do not typically launch cmd.exe. (...)
The following detects the execution of cscript.exe or wscript.exe processes spawned by cmd.exe, leveraging Endpoint Detection and Response (EDR) telemetry mapped to the Endpoint data model, with additional contextual filtering to improve fidelity and reduce false positives. (...)
Victor Sergeev, Daniil Yugoslavskiy, oscd.community, Swachchhanda Shrawan Poudel (Nextron Systems)
2019-10-25
2026-01-05
24357373-078f-44ed-9ac4-6d334a668a11
Detects DNS queries made by the finger utility, which can be abused by threat actors to retrieve remote commands for execution on Windows devices. (...)
The following analytic detects email attachments with an unusually high number of spaces in their file names, which is a common tactic used by attackers to obfuscate file extensions. (...)
The following analytic detects suspicious Base64 decode operations that may indicate malicious activity, such as data exfiltration or execution of encoded commands. (...)