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MALPEDIA_Win_Badflick_Auto

autogenerated rule brought to you by yara-signator

MalwareBadflickMalpedia 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: Badflick.

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

Summary generated from the rule's metadata and condition.

Rule source

win-badflick-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Badflick_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "fceced45-8094-5113-8eb3-7bc1d5398974"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.badflick"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.badflick_auto.yar#L1-L125"
		license_url = "N/A"
		logic_hash = "fbdfd77327186af6e19cb8f650d1c36dd5d48aceb4ff34052d597d2f91793407"
		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 = { 8bd8 59 391d???????? 7d22 a1???????? 3bc7 }
		$sequence_1 = { 59 a3???????? 891d???????? ff750c e8???????? 50 }
		$sequence_2 = { 51 51 8b4d0c 8b4101 }
		$sequence_3 = { ff75e8 ff15???????? ff75e8 ff15???????? 33db 43 ff75e8 }
		$sequence_4 = { 8bec 83ec2c 8d45d4 50 ff15???????? 8d45f8 }
		$sequence_5 = { 23c7 5f c9 c3 55 8bec }
		$sequence_6 = { 6683bdf8fdffff00 56 8db5f8fdffff 7431 56 ff15???????? 50 }
		$sequence_7 = { ffd6 59 59 eb03 83c702 66833f00 75f7 }
		$sequence_8 = { ff75f8 ff75e4 ff15???????? ebce 55 8bec 56 }
		$sequence_9 = { 8901 83f8ff 750b 57 e8???????? }

	condition:
		7 of them and filesize < 81920
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 8bd8 59 391d???????? 7d22 a1???????? 3bc7 }
$sequence_1hex{ 59 a3???????? 891d???????? ff750c e8???????? 50 }
$sequence_2hex{ 51 51 8b4d0c 8b4101 }
$sequence_3hex{ ff75e8 ff15???????? ff75e8 ff15???????? 33db 43 ff75e8 }
$sequence_4hex{ 8bec 83ec2c 8d45d4 50 ff15???????? 8d45f8 }
$sequence_5hex{ 23c7 5f c9 c3 55 8bec }
$sequence_6hex{ 6683bdf8fdffff00 56 8db5f8fdffff 7431 56 ff15???????? 50 }
$sequence_7hex{ ffd6 59 59 eb03 83c702 66833f00 75f7 }
$sequence_8hex{ ff75f8 ff75e4 ff15???????? ebce 55 8bec 56 }
$sequence_9hex{ 8901 83f8ff 750b 57 e8???????? }

Condition

7 of them and filesize < 81920

In plain words (Heuristic)

  • The file must be smaller than 81920 (a cheap guard that skips large files).
  • At least 7 patterns in the rule must match.

Test this rule in your browser

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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: fceced45-8094-5113-8eb3-7bc1d5398974

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