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MALPEDIA_Win_Citadel_Auto

autogenerated rule brought to you by yara-signator

MalwareCitadelMalpedia 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: Citadel.

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

Summary generated from the rule's metadata and condition.

Rule source

win-citadel-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Citadel_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "ae8e7236-0008-59d9-b25b-2f4e4ce0fb70"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.citadel"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.citadel_auto.yar#L1-L166"
		license_url = "N/A"
		logic_hash = "2ea1755e280357833299c68e03bd91e76adb6bee21b3adff71679409787c95ea"
		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 = { eb0e 6800800000 53 57 56 ff15???????? }
		$sequence_1 = { ff15???????? 85c0 0f8566010000 57 }
		$sequence_2 = { 41 66395802 7405 83c002 }
		$sequence_3 = { 3d00002003 7715 8b4d08 890e }
		$sequence_4 = { 0f8566010000 57 57 57 }
		$sequence_5 = { 50 57 e8???????? 33db 3c01 }
		$sequence_6 = { 03f7 6a0d 5f e8???????? 59 59 }
		$sequence_7 = { 33c9 663918 7507 41 }
		$sequence_8 = { 33c0 6689460e 0fb74606 6685c0 7432 66ff460c }
		$sequence_9 = { 8bf8 c745f801000000 85f6 0f842b010000 837e1000 0f8421010000 807e1400 }
		$sequence_10 = { 0f8525ffffff 5b b001 eb30 d0e8 }
		$sequence_11 = { 0f8421010000 807e1400 0f8417010000 85ff 0f84dd000000 53 837df800 }
		$sequence_12 = { 7432 66ff460e 6639460e 7228 8b4610 8a4e09 }
		$sequence_13 = { eb30 d0e8 3ac3 73fa }
		$sequence_14 = { 85c0 7409 3255fd 8a0f ffd0 8807 }
		$sequence_15 = { 7404 84d2 7575 33c0 85c0 740b }

	condition:
		7 of them and filesize < 1236992
}

Strings (16 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ eb0e 6800800000 53 57 56 ff15???????? }
$sequence_1hex{ ff15???????? 85c0 0f8566010000 57 }
$sequence_2hex{ 41 66395802 7405 83c002 }
$sequence_3hex{ 3d00002003 7715 8b4d08 890e }
$sequence_4hex{ 0f8566010000 57 57 57 }
$sequence_5hex{ 50 57 e8???????? 33db 3c01 }
$sequence_6hex{ 03f7 6a0d 5f e8???????? 59 59 }
$sequence_7hex{ 33c9 663918 7507 41 }
$sequence_8hex{ 33c0 6689460e 0fb74606 6685c0 7432 66ff460c }
$sequence_9hex{ 8bf8 c745f801000000 85f6 0f842b010000 837e1000 0f8421010000 807e1400 }
$sequence_10hex{ 0f8525ffffff 5b b001 eb30 d0e8 }
$sequence_11hex{ 0f8421010000 807e1400 0f8417010000 85ff 0f84dd000000 53 837df800 }
$sequence_12hex{ 7432 66ff460e 6639460e 7228 8b4610 8a4e09 }
$sequence_13hex{ eb30 d0e8 3ac3 73fa }
$sequence_14hex{ 85c0 7409 3255fd 8a0f ffd0 8807 }
$sequence_15hex{ 7404 84d2 7575 33c0 85c0 740b }

Condition

7 of them and filesize < 1236992

In plain words (Heuristic)

  • The file must be smaller than 1236992 (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: ae8e7236-0008-59d9-b25b-2f4e4ce0fb70

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