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MALPEDIA_Win_H1N1_Auto

autogenerated rule brought to you by yara-signator

MalwareH1N1Malpedia 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: H1N1.

It defines 16 patterns (0 text, 16 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

win-h1n1-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_H1N1_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "9b146697-9791-5099-8226-ae9fcb0630e1"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.h1n1"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.h1n1_auto.yar#L1-L172"
		license_url = "N/A"
		logic_hash = "765db783b2f41671982a50d1cf60b08bf27002298dd12c9d873aef5b9b6f4245"
		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 = { ff750c ff35???????? 58 ffd0 50 ff750c }
		$sequence_1 = { 6a00 6a00 6a00 50 6a00 6a00 ff75fc }
		$sequence_2 = { 83c608 ac aa 3c2f 75fa }
		$sequence_3 = { 59 85c0 75d1 83bb8000000000 7465 }
		$sequence_4 = { aa 3c0d 75fa 4f 33c0 }
		$sequence_5 = { 8b5d08 035b3c 6a00 ff7350 6a00 6840000008 }
		$sequence_6 = { 7453 e8???????? 8ae0 ac 0ac0 7447 3c3d }
		$sequence_7 = { ff75f8 ff7508 ff75fc ff75f4 ff35???????? }
		$sequence_8 = { e8???????? ff7508 8d85f0fdffff 68dc600010 }
		$sequence_9 = { 8bec 81ec04040000 53 56 68806e0010 }
		$sequence_10 = { d1e9 330c8500850010 330c95f48b0010 42 890c95bc850010 81fae3000000 }
		$sequence_11 = { 8d3c95c0850010 8b0f 334f04 23cb 330f }
		$sequence_12 = { 56 6800800010 ff742410 e8???????? }
		$sequence_13 = { d1e9 8b048500850010 338774fcffff 33c1 8907 83c704 }
		$sequence_14 = { 23cb 330d???????? 5b 8bc1 83e001 d1e9 330c8500850010 }
		$sequence_15 = { 8d8614850010 50 ffb610850010 57 ff15???????? 83c608 83fe18 }

	condition:
		7 of them and filesize < 172032
}

Strings (16 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ ff750c ff35???????? 58 ffd0 50 ff750c }
$sequence_1hex{ 6a00 6a00 6a00 50 6a00 6a00 ff75fc }
$sequence_2hex{ 83c608 ac aa 3c2f 75fa }
$sequence_3hex{ 59 85c0 75d1 83bb8000000000 7465 }
$sequence_4hex{ aa 3c0d 75fa 4f 33c0 }
$sequence_5hex{ 8b5d08 035b3c 6a00 ff7350 6a00 6840000008 }
$sequence_6hex{ 7453 e8???????? 8ae0 ac 0ac0 7447 3c3d }
$sequence_7hex{ ff75f8 ff7508 ff75fc ff75f4 ff35???????? }
$sequence_8hex{ e8???????? ff7508 8d85f0fdffff 68dc600010 }
$sequence_9hex{ 8bec 81ec04040000 53 56 68806e0010 }
$sequence_10hex{ d1e9 330c8500850010 330c95f48b0010 42 890c95bc850010 81fae3000000 }
$sequence_11hex{ 8d3c95c0850010 8b0f 334f04 23cb 330f }
$sequence_12hex{ 56 6800800010 ff742410 e8???????? }
$sequence_13hex{ d1e9 8b048500850010 338774fcffff 33c1 8907 83c704 }
$sequence_14hex{ 23cb 330d???????? 5b 8bc1 83e001 d1e9 330c8500850010 }
$sequence_15hex{ 8d8614850010 50 ffb610850010 57 ff15???????? 83c608 83fe18 }

Condition

7 of them and filesize < 172032

In plain words (Heuristic)

  • The file must be smaller than 172032 (a cheap guard that skips large files).
  • At least 7 patterns in the rule must match.

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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: 9b146697-9791-5099-8226-ae9fcb0630e1

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