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MALPEDIA_Win_Flusihoc_Auto

autogenerated rule brought to you by yara-signator

MalwareFlusihocMalpedia 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: Flusihoc.

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

Summary generated from the rule's metadata and condition.

Rule source

win-flusihoc-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Flusihoc_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "aa1d30fd-9a5f-5977-b1cf-b323ea3cbb49"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.flusihoc"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.flusihoc_auto.yar#L1-L172"
		license_url = "N/A"
		logic_hash = "6c1029f65d4facbc15d18f2f2d2ef3e91bd264c4306a1959142efaef5eb93d4d"
		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 = { 8db42459010000 6a00 6a01 6a02 }
		$sequence_1 = { 3d68010000 7505 fe06 fe4e17 83f834 }
		$sequence_2 = { ffd6 8b542414 52 ffd6 6a0a ff15???????? }
		$sequence_3 = { 3d88010000 7505 fe06 fe461e 3d68010000 7505 }
		$sequence_4 = { 53 56 57 6a40 8d442428 6a00 50 }
		$sequence_5 = { 41 84c0 75f1 8d45f0 50 e8???????? }
		$sequence_6 = { 33c0 888c045e010000 8a4c042c 40 80f92f }
		$sequence_7 = { 50 ff15???????? 8b4c2410 51 ffd6 8b542414 52 }
		$sequence_8 = { 6a00 50 c744242c44000000 e8???????? }
		$sequence_9 = { ffd3 8b442410 6aff 50 ff15???????? }
		$sequence_10 = { 83e4f8 81ece40b0000 a1???????? 33c4 }
		$sequence_11 = { 7416 8d4de8 3c7c 740f 3c0a }
		$sequence_12 = { b854160000 e8???????? a1???????? 33c4 89842450160000 53 }
		$sequence_13 = { 8b95f4feffff 52 ff15???????? 8b4dfc 33cd 33c0 e8???????? }
		$sequence_14 = { ff15???????? 8d95f4feffff 52 6806000200 6a00 68???????? }
		$sequence_15 = { 752f 8b8df4feffff 6804010000 8d85f8feffff 50 6a01 6a00 }

	condition:
		7 of them and filesize < 319488
}

Strings (16 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 8db42459010000 6a00 6a01 6a02 }
$sequence_1hex{ 3d68010000 7505 fe06 fe4e17 83f834 }
$sequence_2hex{ ffd6 8b542414 52 ffd6 6a0a ff15???????? }
$sequence_3hex{ 3d88010000 7505 fe06 fe461e 3d68010000 7505 }
$sequence_4hex{ 53 56 57 6a40 8d442428 6a00 50 }
$sequence_5hex{ 41 84c0 75f1 8d45f0 50 e8???????? }
$sequence_6hex{ 33c0 888c045e010000 8a4c042c 40 80f92f }
$sequence_7hex{ 50 ff15???????? 8b4c2410 51 ffd6 8b542414 52 }
$sequence_8hex{ 6a00 50 c744242c44000000 e8???????? }
$sequence_9hex{ ffd3 8b442410 6aff 50 ff15???????? }
$sequence_10hex{ 83e4f8 81ece40b0000 a1???????? 33c4 }
$sequence_11hex{ 7416 8d4de8 3c7c 740f 3c0a }
$sequence_12hex{ b854160000 e8???????? a1???????? 33c4 89842450160000 53 }
$sequence_13hex{ 8b95f4feffff 52 ff15???????? 8b4dfc 33cd 33c0 e8???????? }
$sequence_14hex{ ff15???????? 8d95f4feffff 52 6806000200 6a00 68???????? }
$sequence_15hex{ 752f 8b8df4feffff 6804010000 8d85f8feffff 50 6a01 6a00 }

Condition

7 of them and filesize < 319488

In plain words (Heuristic)

  • The file must be smaller than 319488 (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: aa1d30fd-9a5f-5977-b1cf-b323ea3cbb49

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