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MALPEDIA_Win_Spedear_Auto

autogenerated rule brought to you by yara-signator

MalwareSpedearMalpedia signator rulesCreative Commons Attribution-ShareAlike 4.0Compiles with YARA-X (with warnings)
Author
Felix Bilstein - yara-signator at cocacoding dot com
Date
2026-05-04
Modified
2026-05-18
Score / Quality
75 / 71

What this rule detects

autogenerated rule brought to you by yara-signator

Associated malware family: Spedear.

It defines 27 patterns (0 text, 27 hex, 0 regex).

YARA-X says: warning[text_as_hex]: hex pattern could be written as text literal

Summary generated from the rule's metadata and condition.

Rule source

win-spedear-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Spedear_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "bc74395a-f867-5375-b1a4-3194ab3faef7"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.spedear"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.spedear_auto.yar#L1-L258"
		license_url = "N/A"
		logic_hash = "8ad71d71fef6d799b3c4103e4255891e4d1c676677fc2e42c68cbbb5bc612621"
		score = 75
		quality = 71
		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 = { 99 83e207 03c2 c1f803 83c40c }
		$sequence_1 = { 8b4718 8a5f06 50 894608 }
		$sequence_2 = { 53 50 e8???????? 8b7e0c 895e10 }
		$sequence_3 = { 83c408 c20800 51 53 }
		$sequence_4 = { 83fe12 7cd7 8d754c bb04000000 bf80000000 }
		$sequence_5 = { 5f 8b4c2428 33cc e8???????? 83c42c c20800 56 }
		$sequence_6 = { 6a00 68???????? e8???????? 83c40c 68d0070000 }
		$sequence_7 = { 0fb6d9 894c2414 0fb6e8 c1e808 8bc8 }
		$sequence_8 = { 894618 ffd7 89461c 5f }
		$sequence_9 = { 8b4718 894608 8b4f1c 51 e8???????? 894604 }
		$sequence_10 = { ff7608 ff5604 6800800000 6a00 }
		$sequence_11 = { 8bc7 5e 5f 5b 5d c3 6a08 }
		$sequence_12 = { 833e00 741a 6a00 6a00 ff7608 }
		$sequence_13 = { 394878 7456 39487c 7451 }
		$sequence_14 = { 53 50 89b5d8fbffff e8???????? 8b3d???????? }
		$sequence_15 = { 6a00 50 8906 e8???????? 83c410 c3 }
		$sequence_16 = { 83c8ff e9???????? 4c8bfb 4c8bf3 488d0540d30000 }
		$sequence_17 = { 4863d9 4c8be3 49c1fc05 4c8d2d56ab0000 83e31f }
		$sequence_18 = { 7cc1 034004 8b4804 8b10 03d1 }
		$sequence_19 = { 4889842480040000 488bd9 33ff 488d8c2471030000 }
		$sequence_20 = { 4c8d4c2440 488d542448 41b820000000 488bcf 48c744242000000000 ff15???????? }
		$sequence_21 = { 448ba088000000 488b4110 4c896c2410 4c89742408 468b74201c 468b6c2024 428b6c2020 }
		$sequence_22 = { 8b4d08 8945f0 8b450c 8945f4 8b4514 40 c745ec2dba2300 }
		$sequence_23 = { 89430c 8d4310 8d89bc182400 5a 668b31 668930 83c102 }
		$sequence_24 = { 0fb7444b10 6641898448b81c0100 ffc2 89542420 ebe2 8bd7 89542420 }
		$sequence_25 = { 480fbec5 420fbe8c0870b30000 83e10f eb03 }
		$sequence_26 = { b964000000 ff15???????? 48ffc3 4883ef01 75db }

	condition:
		7 of them and filesize < 188416
}

Strings (27 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 99 83e207 03c2 c1f803 83c40c }
$sequence_1hex{ 8b4718 8a5f06 50 894608 }
$sequence_2hex{ 53 50 e8???????? 8b7e0c 895e10 }
$sequence_3hex{ 83c408 c20800 51 53 }
$sequence_4hex{ 83fe12 7cd7 8d754c bb04000000 bf80000000 }
$sequence_5hex{ 5f 8b4c2428 33cc e8???????? 83c42c c20800 56 }
$sequence_6hex{ 6a00 68???????? e8???????? 83c40c 68d0070000 }
$sequence_7hex{ 0fb6d9 894c2414 0fb6e8 c1e808 8bc8 }
$sequence_8hex{ 894618 ffd7 89461c 5f }
$sequence_9hex{ 8b4718 894608 8b4f1c 51 e8???????? 894604 }
$sequence_10hex{ ff7608 ff5604 6800800000 6a00 }
$sequence_11hex{ 8bc7 5e 5f 5b 5d c3 6a08 }
$sequence_12hex{ 833e00 741a 6a00 6a00 ff7608 }
$sequence_13hex{ 394878 7456 39487c 7451 }
$sequence_14hex{ 53 50 89b5d8fbffff e8???????? 8b3d???????? }
$sequence_15hex{ 6a00 50 8906 e8???????? 83c410 c3 }
$sequence_16hex{ 83c8ff e9???????? 4c8bfb 4c8bf3 488d0540d30000 }
$sequence_17hex{ 4863d9 4c8be3 49c1fc05 4c8d2d56ab0000 83e31f }
$sequence_18hex{ 7cc1 034004 8b4804 8b10 03d1 }
$sequence_19hex{ 4889842480040000 488bd9 33ff 488d8c2471030000 }
$sequence_20hex{ 4c8d4c2440 488d542448 41b820000000 488bcf 48c744242000000000 ff15???????? }
$sequence_21hex{ 448ba088000000 488b4110 4c896c2410 4c89742408 468b74201c 468b6c2024 428b6c2020 }
$sequence_22hex{ 8b4d08 8945f0 8b450c 8945f4 8b4514 40 c745ec2dba2300 }
$sequence_23hex{ 89430c 8d4310 8d89bc182400 5a 668b31 668930 83c102 }
$sequence_24hex{ 0fb7444b10 6641898448b81c0100 ffc2 89542420 ebe2 8bd7 89542420 }
$sequence_25hex{ 480fbec5 420fbe8c0870b30000 83e10f eb03 }
$sequence_26hex{ b964000000 ff15???????? 48ffc3 4883ef01 75db }

Condition

7 of them and filesize < 188416

In plain words (Heuristic)

  • The file must be smaller than 188416 (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: bc74395a-f867-5375-b1a4-3194ab3faef7

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