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MALPEDIA_Win_Whitebird_Auto

autogenerated rule brought to you by yara-signator

MalwareWhitebirdMalpedia 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: Whitebird.

It defines 15 patterns (0 text, 15 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

win-whitebird-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Whitebird_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "8d8629e9-04d0-5d1b-a7ec-52f8962a19ca"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.whitebird"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.whitebird_auto.yar#L1-L160"
		license_url = "N/A"
		logic_hash = "d87787dcbb00e387c1455bf1cef6c6ed4e84fd4e1eef674ade6ef4ca6e18318e"
		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 = { eb09 80f92f 0f95c1 80c13f }
		$sequence_1 = { 83ff0b 0f8e2d010000 488d842460030000 488d8c2470030000 488b10 }
		$sequence_2 = { 51 e8???????? 59 8985a8fdffff }
		$sequence_3 = { 418d5003 8d7aff 8bcf ff15???????? 33c9 }
		$sequence_4 = { 834dfcff 8bc8 a3???????? e8???????? bf???????? 57 ff15???????? }
		$sequence_5 = { a1???????? 83c410 85c0 7405 8b4004 eb02 }
		$sequence_6 = { 56 43 53 e8???????? 53 }
		$sequence_7 = { 48895c2428 4c895c2420 ff5718 3bc3 0f8c3a010000 }
		$sequence_8 = { e9???????? ba20000000 488bcf ff15???????? 4c8be0 4885c0 }
		$sequence_9 = { 488bf2 8d6b05 4863cd e8???????? 488bf8 }
		$sequence_10 = { be05000000 403833 7551 8a4301 }
		$sequence_11 = { 488d05d4bdffff 33ff 4c8be9 488901 4889b910020000 }
		$sequence_12 = { 68???????? 57 ff15???????? 8bf0 59 33c0 59 }
		$sequence_13 = { 899da0f5ffff c78594f5ffff64000000 e8???????? 53 6a01 8d85d7f5ffff 50 }
		$sequence_14 = { eb3f 6a54 ebd2 83e864 742a 48 }

	condition:
		7 of them and filesize < 139264
}

Strings (15 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ eb09 80f92f 0f95c1 80c13f }
$sequence_1hex{ 83ff0b 0f8e2d010000 488d842460030000 488d8c2470030000 488b10 }
$sequence_2hex{ 51 e8???????? 59 8985a8fdffff }
$sequence_3hex{ 418d5003 8d7aff 8bcf ff15???????? 33c9 }
$sequence_4hex{ 834dfcff 8bc8 a3???????? e8???????? bf???????? 57 ff15???????? }
$sequence_5hex{ a1???????? 83c410 85c0 7405 8b4004 eb02 }
$sequence_6hex{ 56 43 53 e8???????? 53 }
$sequence_7hex{ 48895c2428 4c895c2420 ff5718 3bc3 0f8c3a010000 }
$sequence_8hex{ e9???????? ba20000000 488bcf ff15???????? 4c8be0 4885c0 }
$sequence_9hex{ 488bf2 8d6b05 4863cd e8???????? 488bf8 }
$sequence_10hex{ be05000000 403833 7551 8a4301 }
$sequence_11hex{ 488d05d4bdffff 33ff 4c8be9 488901 4889b910020000 }
$sequence_12hex{ 68???????? 57 ff15???????? 8bf0 59 33c0 59 }
$sequence_13hex{ 899da0f5ffff c78594f5ffff64000000 e8???????? 53 6a01 8d85d7f5ffff 50 }
$sequence_14hex{ eb3f 6a54 ebd2 83e864 742a 48 }

Condition

7 of them and filesize < 139264

In plain words (Heuristic)

  • The file must be smaller than 139264 (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: 8d8629e9-04d0-5d1b-a7ec-52f8962a19ca

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