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MALPEDIA_Win_Medusa_Http_Auto

autogenerated rule brought to you by yara-signator

MalwareMedusa HttpMalpedia signator rulesCreative Commons Attribution-ShareAlike 4.0Compiles with YARA-X
Author
Felix Bilstein - yara-signator at cocacoding dot com
Date
2026-05-04
Modified
2026-05-18
Score / Quality
75 / 75

What this rule detects

autogenerated rule brought to you by yara-signator

Associated malware family: Medusa Http.

It defines 10 patterns (0 text, 10 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

win-medusa-http-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Medusa_Http_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "d20a8f8a-0c40-56df-b905-5b8d6ebe61b2"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.medusa_http"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.medusa_http_auto.yar#L1-L120"
		license_url = "N/A"
		logic_hash = "bf22f346b79f830cfb557e80bea02849fba4fc00ac522de893ed484b5992cd17"
		score = 75
		quality = 75
		tags = "FILE"
		version = "1"
		tool = "yara-signator v0.6.0"
		signator_config = "callsandjumps;datarefs;binvalue"
		malpedia_rule_date = "20260422"
		malpedia_hash = "a182e35da64e6d71cb55f125c4d4225196523f14"
		malpedia_version = "20260504"
		malpedia_license = "CC BY-SA 4.0"
		malpedia_sharing = "TLP:WHITE"

	strings:
		$sequence_0 = { e1fb 1cc9 3ca5 2c8e a1???????? d528 }
		$sequence_1 = { ff7100 52 ff7200 53 ff7300 54 }
		$sequence_2 = { 6a00 4b ff6b00 4c ff6c004d ff6d00 4e }
		$sequence_3 = { 0050ff 7000 51 ff7100 }
		$sequence_4 = { 53 ff7300 54 ff740055 ff7500 56 }
		$sequence_5 = { 8b4c6386 8608 5f e1fb 1cc9 3ca5 2c8e }
		$sequence_6 = { 0c48 b5f9 43 324dd5 1ddf859f31 }
		$sequence_7 = { 0000 aa 05854cffab 004893 }
		$sequence_8 = { 05854cffab 004893 3eb35b 813bf80937dc 8b4c6386 }
		$sequence_9 = { 1cc9 3ca5 2c8e a1???????? d528 32f4 }

	condition:
		7 of them and filesize < 1720320
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ e1fb 1cc9 3ca5 2c8e a1???????? d528 }
$sequence_1hex{ ff7100 52 ff7200 53 ff7300 54 }
$sequence_2hex{ 6a00 4b ff6b00 4c ff6c004d ff6d00 4e }
$sequence_3hex{ 0050ff 7000 51 ff7100 }
$sequence_4hex{ 53 ff7300 54 ff740055 ff7500 56 }
$sequence_5hex{ 8b4c6386 8608 5f e1fb 1cc9 3ca5 2c8e }
$sequence_6hex{ 0c48 b5f9 43 324dd5 1ddf859f31 }
$sequence_7hex{ 0000 aa 05854cffab 004893 }
$sequence_8hex{ 05854cffab 004893 3eb35b 813bf80937dc 8b4c6386 }
$sequence_9hex{ 1cc9 3ca5 2c8e a1???????? d528 32f4 }

Condition

7 of them and filesize < 1720320

In plain words (Heuristic)

  • The file must be smaller than 1720320 (a cheap guard that skips large files).
  • At least 7 patterns in the rule must match.

Test this rule in your browser

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References

Licence & attribution

Author: Felix Bilstein - yara-signator at cocacoding dot com

Source repository: Malpedia signator rules @ c901f97b7d

Licence: Creative Commons Attribution-ShareAlike 4.0 (repository licence)

Original rule

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

Rule id: d20a8f8a-0c40-56df-b905-5b8d6ebe61b2

Metadata

version1
toolyara-signator v0.6.0
signator_configcallsandjumps;datarefs;binvalue
malpedia_rule_date20260422
malpedia_hasha182e35da64e6d71cb55f125c4d4225196523f14
malpedia_version20260504
malpedia_licenseCC BY-SA 4.0
malpedia_sharingTLP:WHITE

Tags:FILE