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MALPEDIA_Win_Snatch_Loader_Auto

autogenerated rule brought to you by yara-signator

MalwareSnatch LoaderMalpedia 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: Snatch Loader.

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

Summary generated from the rule's metadata and condition.

Rule source

win-snatch-loader-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Snatch_Loader_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "e9ca2700-27c0-5d6b-98c9-5a2ddbfa9eb8"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.snatch_loader"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.snatch_loader_auto.yar#L1-L167"
		license_url = "N/A"
		logic_hash = "80a133ba734986340b80049c5adabe47993c8143bb78dd7386ee1b2f1e07639d"
		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 = { c3 56 33f6 49 }
		$sequence_1 = { a3???????? 85c0 7505 8b7dfc eb04 ffd0 }
		$sequence_2 = { 8bf8 a1???????? 85c0 7522 6a02 59 e8???????? }
		$sequence_3 = { 8bc8 e8???????? a3???????? 85c0 7404 }
		$sequence_4 = { 57 33db bfe71edec0 895dfc }
		$sequence_5 = { 85c0 7406 57 6a00 56 ffd0 }
		$sequence_6 = { 85c0 7408 53 6a08 57 ffd0 }
		$sequence_7 = { 8bf0 85f6 744b 33c0 66894606 }
		$sequence_8 = { 7454 394508 734f ff7510 e8???????? 8945f8 0bc0 }
		$sequence_9 = { ff750c ff7508 6a00 6a00 e8???????? 8945fc }
		$sequence_10 = { 8b7508 56 e8???????? 0bc0 }
		$sequence_11 = { 72ee 8bc2 034508 5a 59 }
		$sequence_12 = { 8b5278 035508 8b5a20 035d08 33c9 833f00 }
		$sequence_13 = { 33d2 33c9 8a0431 0ac0 741f }
		$sequence_14 = { 7440 3b45fc 773b 8b750c 8b7d10 }
		$sequence_15 = { e8???????? 8945fc 0bc0 7454 }

	condition:
		7 of them and filesize < 262144
}

Strings (16 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ c3 56 33f6 49 }
$sequence_1hex{ a3???????? 85c0 7505 8b7dfc eb04 ffd0 }
$sequence_2hex{ 8bf8 a1???????? 85c0 7522 6a02 59 e8???????? }
$sequence_3hex{ 8bc8 e8???????? a3???????? 85c0 7404 }
$sequence_4hex{ 57 33db bfe71edec0 895dfc }
$sequence_5hex{ 85c0 7406 57 6a00 56 ffd0 }
$sequence_6hex{ 85c0 7408 53 6a08 57 ffd0 }
$sequence_7hex{ 8bf0 85f6 744b 33c0 66894606 }
$sequence_8hex{ 7454 394508 734f ff7510 e8???????? 8945f8 0bc0 }
$sequence_9hex{ ff750c ff7508 6a00 6a00 e8???????? 8945fc }
$sequence_10hex{ 8b7508 56 e8???????? 0bc0 }
$sequence_11hex{ 72ee 8bc2 034508 5a 59 }
$sequence_12hex{ 8b5278 035508 8b5a20 035d08 33c9 833f00 }
$sequence_13hex{ 33d2 33c9 8a0431 0ac0 741f }
$sequence_14hex{ 7440 3b45fc 773b 8b750c 8b7d10 }
$sequence_15hex{ e8???????? 8945fc 0bc0 7454 }

Condition

7 of them and filesize < 262144

In plain words (Heuristic)

  • The file must be smaller than 262144 (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: e9ca2700-27c0-5d6b-98c9-5a2ddbfa9eb8

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