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MALPEDIA_Win_Santa_Stealer_Auto

autogenerated rule brought to you by yara-signator

MalwareSanta 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: Santa Stealer.

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

Summary generated from the rule's metadata and condition.

Rule source

win-santa-stealer-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Santa_Stealer_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "d1fd15ad-7a3d-5595-97cf-69df8560dd65"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.santa_stealer"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.santa_stealer_auto.yar#L1-L134"
		license_url = "N/A"
		logic_hash = "b2de36531f2ed031c4dac419ae11d768684a1ddd7f608f2f2664c37f846ef406"
		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 = { f6c208 0f840a010000 4d8b6f40 49634500 85c0 0f8efa000000 4c89842490000000 }
		$sequence_1 = { 4c89d2 4889f9 e8???????? 4585ed 400f95c5 807f6700 752a }
		$sequence_2 = { e8???????? 8b9424ac000000 4889c7 85d2 0f8827050000 0f8511060000 488bac24c8000000 }
		$sequence_3 = { c744242000000000 ba47000000 e8???????? 0fb64761 4189e9 4c89e1 448b44244c }
		$sequence_4 = { e8???????? 4885c0 0f845dfbffff 488d0dafaf1700 e8???????? 4885c0 0f8448fbffff }
		$sequence_5 = { f20f10642428 f20f59d9 f20f59c2 f20f58c3 f20f58c4 f20f11442428 f20f10442420 }
		$sequence_6 = { e8???????? c744242000000000 488b942428010000 4531c9 4189c0 89842418010000 e8???????? }
		$sequence_7 = { e8???????? b801000000 89db 488d15a5cb1500 0fb61c1a 01df 488d5638 }
		$sequence_8 = { c68424ad00000000 c78424cc00000000000000 0fb6bc2497000000 48c74030ffffffff e9???????? c684249600000000 c78424a800000000000000 }
		$sequence_9 = { e9???????? 4889bc24a0000000 488b4510 c78424ac00000064000000 f30f6f9424a0000000 0f1110 e9???????? }

	condition:
		7 of them and filesize < 27009024
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ f6c208 0f840a010000 4d8b6f40 49634500 85c0 0f8efa000000 4c89842490000000 }
$sequence_1hex{ 4c89d2 4889f9 e8???????? 4585ed 400f95c5 807f6700 752a }
$sequence_2hex{ e8???????? 8b9424ac000000 4889c7 85d2 0f8827050000 0f8511060000 488bac24c8000000 }
$sequence_3hex{ c744242000000000 ba47000000 e8???????? 0fb64761 4189e9 4c89e1 448b44244c }
$sequence_4hex{ e8???????? 4885c0 0f845dfbffff 488d0dafaf1700 e8???????? 4885c0 0f8448fbffff }
$sequence_5hex{ f20f10642428 f20f59d9 f20f59c2 f20f58c3 f20f58c4 f20f11442428 f20f10442420 }
$sequence_6hex{ e8???????? c744242000000000 488b942428010000 4531c9 4189c0 89842418010000 e8???????? }
$sequence_7hex{ e8???????? b801000000 89db 488d15a5cb1500 0fb61c1a 01df 488d5638 }
$sequence_8hex{ c68424ad00000000 c78424cc00000000000000 0fb6bc2497000000 48c74030ffffffff e9???????? c684249600000000 c78424a800000000000000 }
$sequence_9hex{ e9???????? 4889bc24a0000000 488b4510 c78424ac00000064000000 f30f6f9424a0000000 0f1110 e9???????? }

Condition

7 of them and filesize < 27009024

In plain words (Heuristic)

  • The file must be smaller than 27009024 (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: d1fd15ad-7a3d-5595-97cf-69df8560dd65

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