RAPIDPULSE retrieves files from the victim system via encrypted commands sent to the web shell.2
tool
RAPIDPULSE S1113
- Type
- malware
- Platforms
- Network Devices, Linux
- Created
- 13 February 2024
- Last modified
- 15 April 2025
RAPIDPULSE is a web shell that exists as a modification to a legitimate Pulse Secure file that has been used by APT5 since at least 2021.[1]
4
TechniquesBottom 17%
3
TacticsBottom 21%
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 S1113
RAPIDPULSE has the ability to RC4 encrypt and base64 encode decrypted files on compromised servers prior to writing them to stdout.3
RAPIDPULSE listens for specific HTTP query parameters in received communications. If specific parameters match, a hard-coded RC4 key is used to decrypt the HTTP query paremter hmacTime. This decrypts to a filename that is then open, read, encrypted with the same RC4 key, base64-encoded, written to standard out, then passed as a response to the HTTP request.4
RAPIDPULSE is a web shell that is capable of arbitrary file read on targeted web servers to exfiltrate items of interest on the victim device.5
Standing S1113
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
Techniques4Bottom 17%
17th percentile · 83% of 825 ATT&CK software entries have more Enterprise techniques.
Tactics3Bottom 21%
21st percentile · 79% 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 / technique21med50th pct
50th percentile · 50% of 825 ATT&CK software entries have more detection rules per technique.
Tests / technique3med
Detection coverage S1113
97 distinct rules cover the 4 techniques recorded for this tool. 68 Sigma · 29 Splunk.
4 covered by at least one rule97 distinct rules in total
tf
Loading...Drag headers to reorder | Drag edges to resize
tf
Loading detections...
| Select | Title | Description | Category | Status | Event | Product | MITRE ATT&CK | CVEs | Severity | Author | Created | Updated | ID | Refs |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
© 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