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YARA · Signature Base (Florian Roth / Nextron)

SIGNATURE_BASE_MAL_Telnyx_Supplychain_Mar26

Detects malicious indicators used in Telnyx supply chain attack

MalwareSignature Base (Florian Roth / Nextron)Detection Rule License 1.1Compiles with YARA-X
Author
Marius Benthin
Date
2026-03-28
Modified
2026-05-15
Score / Quality
80 / 85

What this rule detects

Detects malicious indicators used in Telnyx supply chain attack

It defines 4 patterns (4 text, 0 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

Download .yar
mal-telnyx-supplychain-mar26.yarDetection Rule License 1.1
rule SIGNATURE_BASE_MAL_Telnyx_Supplychain_Mar26 : FILE
{
	meta:
		description = "Detects malicious indicators used in Telnyx supply chain attack"
		author = "Marius Benthin"
		id = "73d9c3d4-7274-5278-aea3-7e921bf5d0b2"
		date = "2026-03-28"
		modified = "2026-05-15"
		reference = "https://www.aikido.dev/blog/telnyx-pypi-compromised-teampcp-canisterworm"
		source_url = "https://github.com/Neo23x0/signature-base/blob/94a1c48d7ab499879287ff611dfe7f9c56376030/yara/mal_teampcp_mar26.yar#L19-L36"
		license_url = "https://github.com/Neo23x0/signature-base/blob/94a1c48d7ab499879287ff611dfe7f9c56376030/LICENSE"
		hash = "ab4c4aebb52027bf3d2f6b2dcef593a1a2cff415774ea4711f7d6e0aa1451d4e"
		logic_hash = "fac4c1a120bd8b046b2cfee677eff47fec6a9347a5a90648b07918337accc9cc"
		score = 80
		quality = 85
		tags = "FILE"

	strings:
		$s1 = "bXNidWlsZC5leGU="
		$s2 = "TW96aWxsY"
		$s3 = ".getnframes("
		$s4 = "exec(base64.b64decode("

	condition:
		filesize < 500KB and 3 of them
}

Strings (4 patterns)

IdentifierTypeValueModifiers
$s1text"bXNidWlsZC5leGU="
$s2text"TW96aWxsY"
$s3text".getnframes("
$s4text"exec(base64.b64decode("

Condition

filesize < 500KB and 3 of them

In plain words (Heuristic)

  • The file must be smaller than 500KB (a cheap guard that skips large files).
  • At least 3 patterns in the rule must match.

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References

Sample hashes

Hashes of samples the author lists in the rule's meta (look them up in your threat-intelligence platform).

  • ab4c4aebb52027bf3d2f6b2dcef593a1a2cff415774ea4711f7d6e0aa1451d4e

Licence & attribution

Author: Marius Benthin

Source repository: Signature Base (Florian Roth / Nextron) @ 94a1c48d7a

Licence: Detection Rule License 1.1 (repository licence)

Original rule

Mirrored via YARA Forge 20260927, which prefixes rule names with the source and adds normalised meta fields.

Rule id: 73d9c3d4-7274-5278-aea3-7e921bf5d0b2

Tags:FILE

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