Proxy access to raw paste endpoints on paste.ee and Pastebin-style services

Alerts on proxy requests for raw paste service URLs that can be used to stage or fetch malicious payloads.

FreeReviewedSigma · High · v2

Category: proxy
Author: Florian Roth (Nextron Systems) (SigmaHQ), DRL 1.1
Published: 2019-12-05
Updated: 2026-07-31

ATT&CK techniques

Recon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule identifies HTTP proxy requests whose URLs contain raw paste paths for multiple paste services, including paste.ee and Pastebin-style “/raw/” endpoints. Attackers commonly use these locations to stage or retrieve secondary-stage content that may be delivered in encoded or otherwise non-obvious form. The detection relies on proxy telemetry capturing the requested URL path (c-uri) and matches specific raw/paste URL patterns.

Reporting behind it

Related detections9 linkedT1071.001 — drag to rearrange

Proxy Downloads Containing /pwndrop/ (PwnDrp Web Server)

Possible GammaSteel C2 Using Spoofed iPhone User Agent

Malicious Interlock RAT FileFix Download-Cradle via PowerShell WebClient with PowerShell User-Agent (via ps_script)

Suspicious Cobalt Strike Malleable Profile Beaconing via Legacy MSIE9 User-Agent and IE Compatibility URIs (via proxy)

Malicious Cobalt Strike Default Named Pipe Activity

Malicious VoidLink Kernel Rootkit C2 Endpoints via HTTP (via proxy)

Malicious EtherRAT C2 Exfiltration Endpoints via HTTP (via proxy)

Possible PlugX and NPS Proxy Command and Control Domain Lookup

Possible Backdoor Mistic Command and Control Domain Lookup

Proxy access to raw paste endpoints on paste.ee and Pastebin-style services

Pivot detection · T1071.001 · 9 related

Changelog

v2
Candidate ingested via manual entry.2026-07-31
v1
No changelog recorded for this version.2026-07-30

Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.

proxy-requests-to-raw-paste-service-endpoints-5468045b

title: Proxy access to raw paste endpoints on paste.ee and Pastebin-style services
id: 988cc414-d4ad-41dd-a555-a3ad5bb4e491
status: test
description: This rule identifies HTTP proxy requests whose URLs contain raw paste paths for multiple paste services, including paste.ee and Pastebin-style “/raw/” endpoints. Attackers commonly use these locations to stage or retrieve secondary-stage content that may be delivered in encoded or otherwise non-obvious form. The detection relies on proxy telemetry capturing the requested URL path (c-uri) and matches specific raw/paste URL patterns.
references:
  - https://www.virustotal.com/gui/domain/paste.ee/relations
  - https://github.com/SigmaHQ/sigma/blob/master/rules/web/proxy_generic/proxy_raw_paste_service_access.yml
author: Florian Roth (Nextron Systems), Huntrule Team
date: 2019-12-05
modified: 2023-01-19
tags:
  - attack.command-and-control
  - attack.t1071.001
  - attack.t1102.001
  - attack.t1102.003
logsource:
  category: proxy
detection:
  selection:
    c-uri|contains:
      - .paste.ee/r/
      - .pastebin.com/raw/
      - .hastebin.com/raw/
      - .ghostbin.co/paste/*/raw/
      - pastetext.net/
      - pastebin.pl/
      - paste.ee/
  condition: selection
falsepositives:
  - User activity (e.g. developer that shared and copied code snippets and used the raw link instead of just copy & paste)
level: high
license: DRL-1.1
related:
  - id: 5468045b-4fcc-4d1a-973c-c9c9578edacb
    type: derived

Convert

This rule as a query you can run. Uses no unlock credit.

SplunkSPL