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MALPEDIA_Win_Mykings_Spreader_Auto

autogenerated rule brought to you by yara-signator

MalwareMykings SpreaderMalpedia signator rulesCreative Commons Attribution-ShareAlike 4.0Compiles with YARA-X
Author
Felix Bilstein - yara-signator at cocacoding dot com
Date
2023-12-06
Modified
2023-12-08
Score / Quality
75 / 75

What this rule detects

autogenerated rule brought to you by yara-signator

Associated malware family: Mykings Spreader.

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

Summary generated from the rule's metadata and condition.

Rule source

win-mykings-spreader-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Mykings_Spreader_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "96a12e80-b15f-580e-920d-d6c0d35464b0"
		date = "2023-12-06"
		modified = "2023-12-08"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.mykings_spreader"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.mykings_spreader_auto.yar#L1-L132"
		license_url = "N/A"
		logic_hash = "1bcd674173fea4b83a2f4219e8f61306a972490f94a89cfaf5e1f466fdec8eff"
		score = 75
		quality = 75
		tags = "FILE"
		version = "1"
		tool = "yara-signator v0.6.0"
		signator_config = "callsandjumps;datarefs;binvalue"
		malpedia_rule_date = "20231130"
		malpedia_hash = "fc8a0e9f343f6d6ded9e7df1a64dac0cc68d7351"
		malpedia_version = "20230808"
		malpedia_license = "CC BY-SA 4.0"
		malpedia_sharing = "TLP:WHITE"

	strings:
		$sequence_0 = { 7519 51 55 8bce e8???????? 6a00 6a00 }
		$sequence_1 = { 8b1e ff938c000000 8b0424 8b5014 85d2 7507 bf00000000 }
		$sequence_2 = { e8???????? 837e1800 7439 8b4620 c1e003 89c7 8b4618 }
		$sequence_3 = { 89c1 c745f401000000 3b4df4 723d ff4df4 8d7600 ff45f4 }
		$sequence_4 = { 68???????? 50 ff15???????? a3???????? 83c0fe 40 40 }
		$sequence_5 = { 8942fc 89d8 c1f81f 8b1424 8b7208 8b4a0c 29de }
		$sequence_6 = { eb02 b300 e8???????? 8d45cc e8???????? c745cc00000000 58 }
		$sequence_7 = { 33d2 b9???????? 8bc2 8bf2 c1f805 83e61f 8b0485a02e4100 }
		$sequence_8 = { 89d8 29f0 85c0 7e39 8b55f4 85d2 7505 }
		$sequence_9 = { 8b7508 8b36 8975c8 8b7d08 8b7f04 }

	condition:
		7 of them and filesize < 1581056
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 7519 51 55 8bce e8???????? 6a00 6a00 }
$sequence_1hex{ 8b1e ff938c000000 8b0424 8b5014 85d2 7507 bf00000000 }
$sequence_2hex{ e8???????? 837e1800 7439 8b4620 c1e003 89c7 8b4618 }
$sequence_3hex{ 89c1 c745f401000000 3b4df4 723d ff4df4 8d7600 ff45f4 }
$sequence_4hex{ 68???????? 50 ff15???????? a3???????? 83c0fe 40 40 }
$sequence_5hex{ 8942fc 89d8 c1f81f 8b1424 8b7208 8b4a0c 29de }
$sequence_6hex{ eb02 b300 e8???????? 8d45cc e8???????? c745cc00000000 58 }
$sequence_7hex{ 33d2 b9???????? 8bc2 8bf2 c1f805 83e61f 8b0485a02e4100 }
$sequence_8hex{ 89d8 29f0 85c0 7e39 8b55f4 85d2 7505 }
$sequence_9hex{ 8b7508 8b36 8975c8 8b7d08 8b7f04 }

Condition

7 of them and filesize < 1581056

In plain words (Heuristic)

  • The file must be smaller than 1581056 (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: 96a12e80-b15f-580e-920d-d6c0d35464b0

Metadata

version1
toolyara-signator v0.6.0
signator_configcallsandjumps;datarefs;binvalue
malpedia_rule_date20231130
malpedia_hashfc8a0e9f343f6d6ded9e7df1a64dac0cc68d7351
malpedia_version20230808
malpedia_licenseCC BY-SA 4.0
malpedia_sharingTLP:WHITE

Tags:FILE