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MALPEDIA_Win_Flashflood_Auto

autogenerated rule brought to you by yara-signator

MalwareFlashfloodMalpedia 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: Flashflood.

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

Summary generated from the rule's metadata and condition.

Rule source

win-flashflood-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Flashflood_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "3fe8a561-35ad-5cec-b5fe-1888e6cb394e"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.flashflood"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.flashflood_auto.yar#L1-L120"
		license_url = "N/A"
		logic_hash = "0dc336395449e271154fbfa917207d9d0a0a63096c28a7539ca62812b85fe231"
		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 = { ff15???????? 8bf0 59 85f6 59 741c 56 }
		$sequence_1 = { 85c0 753e 8d857cffffff 50 8d853cf9ffff 50 }
		$sequence_2 = { 817d0c00010000 7310 8b550c 33c0 8a82b0984000 8945fc eb11 }
		$sequence_3 = { e8???????? e8???????? 8d85fcfdffff 53 50 e8???????? }
		$sequence_4 = { ffd6 53 ff75fc 6a01 }
		$sequence_5 = { ff15???????? 85c0 7410 83c704 81ff???????? }
		$sequence_6 = { 6a00 50 ff15???????? 8d85a8fcffff }
		$sequence_7 = { e8???????? 85c0 59 7411 6a00 ff750c }
		$sequence_8 = { 6a00 68???????? ff15???????? 68???????? ffd7 }
		$sequence_9 = { 40 8945f8 0fbe06 50 ff15???????? 8bf8 }

	condition:
		7 of them and filesize < 114688
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ ff15???????? 8bf0 59 85f6 59 741c 56 }
$sequence_1hex{ 85c0 753e 8d857cffffff 50 8d853cf9ffff 50 }
$sequence_2hex{ 817d0c00010000 7310 8b550c 33c0 8a82b0984000 8945fc eb11 }
$sequence_3hex{ e8???????? e8???????? 8d85fcfdffff 53 50 e8???????? }
$sequence_4hex{ ffd6 53 ff75fc 6a01 }
$sequence_5hex{ ff15???????? 85c0 7410 83c704 81ff???????? }
$sequence_6hex{ 6a00 50 ff15???????? 8d85a8fcffff }
$sequence_7hex{ e8???????? 85c0 59 7411 6a00 ff750c }
$sequence_8hex{ 6a00 68???????? ff15???????? 68???????? ffd7 }
$sequence_9hex{ 40 8945f8 0fbe06 50 ff15???????? 8bf8 }

Condition

7 of them and filesize < 114688

In plain words (Heuristic)

  • The file must be smaller than 114688 (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: 3fe8a561-35ad-5cec-b5fe-1888e6cb394e

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