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MALPEDIA_Win_Flowershop_Auto

autogenerated rule brought to you by yara-signator

MalwareFlowershopMalpedia 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: Flowershop.

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

Summary generated from the rule's metadata and condition.

Rule source

win-flowershop-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Flowershop_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "d996e688-d586-5dc9-9e2f-3f808fa39e07"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.flowershop"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.flowershop_auto.yar#L1-L132"
		license_url = "N/A"
		logic_hash = "654703c0f70eac5d36dc445d7b6a7a5d3ddc5f9375f8c6b671f8b5c9a000b2ec"
		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 = { 8975f4 7432 3b1d???????? 7631 56 56 56 }
		$sequence_1 = { 56 57 6a34 6a00 68???????? e8???????? 8b7d08 }
		$sequence_2 = { eb33 53 33db 3bc6 7305 6afb }
		$sequence_3 = { 8b38 ff15???????? 3907 740d 8bf7 837e0400 8d4604 }
		$sequence_4 = { 33c0 5f 5e c3 55 8bec 81ec04010000 }
		$sequence_5 = { 57 e8???????? 59 0fb6c0 eb03 6a1e 58 }
		$sequence_6 = { 50 57 e8???????? c1ee10 56 57 }
		$sequence_7 = { ff742414 8bfe 2bfd ffd3 3bf8 7513 57 }
		$sequence_8 = { 8ad0 d3fb 8b4d14 d2e2 8b4dfc 221e 2b4d08 }
		$sequence_9 = { ff35???????? e8???????? 59 59 33c0 eb78 8b45fc }

	condition:
		7 of them and filesize < 829440
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 8975f4 7432 3b1d???????? 7631 56 56 56 }
$sequence_1hex{ 56 57 6a34 6a00 68???????? e8???????? 8b7d08 }
$sequence_2hex{ eb33 53 33db 3bc6 7305 6afb }
$sequence_3hex{ 8b38 ff15???????? 3907 740d 8bf7 837e0400 8d4604 }
$sequence_4hex{ 33c0 5f 5e c3 55 8bec 81ec04010000 }
$sequence_5hex{ 57 e8???????? 59 0fb6c0 eb03 6a1e 58 }
$sequence_6hex{ 50 57 e8???????? c1ee10 56 57 }
$sequence_7hex{ ff742414 8bfe 2bfd ffd3 3bf8 7513 57 }
$sequence_8hex{ 8ad0 d3fb 8b4d14 d2e2 8b4dfc 221e 2b4d08 }
$sequence_9hex{ ff35???????? e8???????? 59 59 33c0 eb78 8b45fc }

Condition

7 of them and filesize < 829440

In plain words (Heuristic)

  • The file must be smaller than 829440 (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: d996e688-d586-5dc9-9e2f-3f808fa39e07

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