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YARA · Signature Base (Florian Roth / Nextron)

SIGNATURE_BASE_MAL_Cisco_LINE_VIPER_ICMP_Tasking_Shellcode_Payloads

Detects LINE VIPER Cisco ASA malware code as part of ICMP tasking shellcode payloads.

MalwareSignature Base (Florian Roth / Nextron)Detection Rule License 1.1Compiles with YARA-X
Author
NCSC
Date
2025-09-25
Modified
2026-05-15
Score / Quality
85 / 85

What this rule detects

Detects LINE VIPER Cisco ASA malware code as part of ICMP tasking shellcode payloads.

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

Summary generated from the rule's metadata and condition.

Rule source

Download .yar
mal-cisco-line-viper-icmp-tasking-shellcode-payloads.yarDetection Rule License 1.1
rule SIGNATURE_BASE_MAL_Cisco_LINE_VIPER_ICMP_Tasking_Shellcode_Payloads
{
	meta:
		description = "Detects LINE VIPER Cisco ASA malware code as part of ICMP tasking shellcode payloads."
		author = "NCSC"
		id = "7f8df075-8ed6-5d24-9743-cf3da9a48ec4"
		date = "2025-09-25"
		modified = "2026-05-15"
		reference = "https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/"
		source_url = "https://github.com/Neo23x0/signature-base/blob/94a1c48d7ab499879287ff611dfe7f9c56376030/yara/apt_cisco_asa_lineviper_rayinitiator_sep25.yar#L187-L217"
		license_url = "https://github.com/Neo23x0/signature-base/blob/94a1c48d7ab499879287ff611dfe7f9c56376030/LICENSE"
		logic_hash = "a11d8cebae498340065244ddaf6863925ef8368cea20af1d1f21c46fc51280ee"
		score = 85
		quality = 85
		tags = ""

	strings:
		$ = {
         55 53 41 54 41 55 41 56 41 57 48 89 E5 48 83 EC 60 48
         31 C0 B9 07 00 00 00 48 8D 7D A8 F3 48 AB BF 01 00 00
         00 BE 30 00 00 00
      }
		$ = {
         49 89 C7 48 C7 C2 38 DF FF FF 64 48 8B 0A 48 8B 99 00
         01 00 00 48 89 81 00 01 00 00
      }
		$ = {
         49 8B 47 10 48 8D 55 B0 BE 01 20 01 00 4C 89 FF FF 90
         90 00 00 00 48 8B 7D B0 48 85 FF 0F 84 3C 00 00 00
      }
		$ = {
         49 8B 47 10 BE 08 20 01 00 4C 89 FF 48 8D 55 A8 FF 90
         90 00 00 00 48 8B 7D B0 49 89 7E 20 48 8B 7D A8 49 89
         7E 28
      }

	condition:
		3 of them
}

Strings (4 patterns)

IdentifierTypeValueModifiers
$hex{ 55 53 41 54 41 55 41 56 41 57 48 89 E5 48 83 EC 60 48 31 C0 B9 07 00 00 00 48 8D 7D A8 F3 48 AB BF 01 00 00 00 BE 30 00 00 00 …
$hex{ 49 89 C7 48 C7 C2 38 DF FF FF 64 48 8B 0A 48 8B 99 00 01 00 00 48 89 81 00 01 00 00 }
$hex{ 49 8B 47 10 48 8D 55 B0 BE 01 20 01 00 4C 89 FF FF 90 90 00 00 00 48 8B 7D B0 48 85 FF 0F 84 3C 00 00 00 }
$hex{ 49 8B 47 10 BE 08 20 01 00 4C 89 FF 48 8D 55 A8 FF 90 90 00 00 00 48 8B 7D B0 49 89 7E 20 48 8B 7D A8 49 89 7E 28 }

Condition

3 of them

In plain words (Heuristic)

  • At least 3 patterns in the rule must match.

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References

Licence & attribution

Author: NCSC

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: 7f8df075-8ed6-5d24-9743-cf3da9a48ec4

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