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MALPEDIA_Win_Snowflake_Stealer_Auto

autogenerated rule brought to you by yara-signator

MalwareSnowflake StealerMalpedia 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: Snowflake Stealer.

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

Summary generated from the rule's metadata and condition.

Rule source

win-snowflake-stealer-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Snowflake_Stealer_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "c0b96cf9-e624-56f3-823a-f283f32ffd30"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.snowflake_stealer"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.snowflake_stealer_auto.yar#L1-L134"
		license_url = "N/A"
		logic_hash = "eb4c7359191bec957d1c92cb77cda613c742d7f8051b1e8b99c514eca893bd9b"
		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 = { e8???????? 83c40c eb14 f30f7e00 f20f104808 f20f114c1008 660fd60410 }
		$sequence_1 = { f3a5 66899880000000 66899082000000 8d8c24b0000000 832000 e8???????? e9???????? }
		$sequence_2 = { f7472400100000 740c ff36 e8???????? 59 85c0 7504 }
		$sequence_3 = { f644242407 5f 5e 5d 5b 740a ff74241c }
		$sequence_4 = { f20f108424c0000000 f20f108c24c8000000 8d8c2490000000 8d7c2418 896f08 f20f114908 f20f1101 }
		$sequence_5 = { e9???????? 89f9 8d9424a4000000 e8???????? 807c243809 0f844ffdffff 8dbc2400010000 }
		$sequence_6 = { ff74241c e8???????? e9???????? f6450408 8b4d1c 745c 8b9c24b4000000 }
		$sequence_7 = { ff700c 57 e8???????? 83c40c 8b442450 8b4c2434 49 }
		$sequence_8 = { f6c301 750f c6463800 eb09 f6c301 0f84903c0000 b101 }
		$sequence_9 = { ff15???????? 688cb50000 ff761c 68???????? 50 680a180000 894614 }

	condition:
		7 of them and filesize < 6196224
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ e8???????? 83c40c eb14 f30f7e00 f20f104808 f20f114c1008 660fd60410 }
$sequence_1hex{ f3a5 66899880000000 66899082000000 8d8c24b0000000 832000 e8???????? e9???????? }
$sequence_2hex{ f7472400100000 740c ff36 e8???????? 59 85c0 7504 }
$sequence_3hex{ f644242407 5f 5e 5d 5b 740a ff74241c }
$sequence_4hex{ f20f108424c0000000 f20f108c24c8000000 8d8c2490000000 8d7c2418 896f08 f20f114908 f20f1101 }
$sequence_5hex{ e9???????? 89f9 8d9424a4000000 e8???????? 807c243809 0f844ffdffff 8dbc2400010000 }
$sequence_6hex{ ff74241c e8???????? e9???????? f6450408 8b4d1c 745c 8b9c24b4000000 }
$sequence_7hex{ ff700c 57 e8???????? 83c40c 8b442450 8b4c2434 49 }
$sequence_8hex{ f6c301 750f c6463800 eb09 f6c301 0f84903c0000 b101 }
$sequence_9hex{ ff15???????? 688cb50000 ff761c 68???????? 50 680a180000 894614 }

Condition

7 of them and filesize < 6196224

In plain words (Heuristic)

  • The file must be smaller than 6196224 (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: c0b96cf9-e624-56f3-823a-f283f32ffd30

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