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MALPEDIA_Win_Wmighost_Auto

autogenerated rule brought to you by yara-signator

MalwareWmighostMalpedia 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: Wmighost.

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

Summary generated from the rule's metadata and condition.

Rule source

win-wmighost-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Wmighost_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "4d961091-e7db-51cf-b2b4-3f5a2dad88fb"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.wmighost"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.wmighost_auto.yar#L1-L122"
		license_url = "N/A"
		logic_hash = "3aa73c6bd5516b227259b8af1959ad4357e1d0f102f6296109b4a3dafddf8756"
		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 = { 6a00 8b95f8feffff 52 e8???????? 83c40c 8b4510 50 }
		$sequence_1 = { 83c40c 8b4510 50 8d8df0fcffff }
		$sequence_2 = { 52 e8???????? 8945b4 8b45b4 }
		$sequence_3 = { c745fcffffffff 8d4d84 e8???????? 8b4df4 64890d00000000 8be5 5d }
		$sequence_4 = { 8d55cc 52 e8???????? 83c408 c645fc00 8d4dcc e8???????? }
		$sequence_5 = { 8d8decfeffff 51 8d958caeffff 52 e8???????? 83c404 }
		$sequence_6 = { ff15???????? e9???????? c745fcffffffff 8d4d84 e8???????? 8b4df4 }
		$sequence_7 = { ff15???????? e9???????? c745fcffffffff 8d4d84 e8???????? }
		$sequence_8 = { 50 8d8df0fcffff 51 68???????? 8b95f8feffff 52 ff15???????? }
		$sequence_9 = { 8b55f8 8882c8304000 8b45f8 0fbe88c8304000 33d2 }

	condition:
		7 of them and filesize < 49152
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 6a00 8b95f8feffff 52 e8???????? 83c40c 8b4510 50 }
$sequence_1hex{ 83c40c 8b4510 50 8d8df0fcffff }
$sequence_2hex{ 52 e8???????? 8945b4 8b45b4 }
$sequence_3hex{ c745fcffffffff 8d4d84 e8???????? 8b4df4 64890d00000000 8be5 5d }
$sequence_4hex{ 8d55cc 52 e8???????? 83c408 c645fc00 8d4dcc e8???????? }
$sequence_5hex{ 8d8decfeffff 51 8d958caeffff 52 e8???????? 83c404 }
$sequence_6hex{ ff15???????? e9???????? c745fcffffffff 8d4d84 e8???????? 8b4df4 }
$sequence_7hex{ ff15???????? e9???????? c745fcffffffff 8d4d84 e8???????? }
$sequence_8hex{ 50 8d8df0fcffff 51 68???????? 8b95f8feffff 52 ff15???????? }
$sequence_9hex{ 8b55f8 8882c8304000 8b45f8 0fbe88c8304000 33d2 }

Condition

7 of them and filesize < 49152

In plain words (Heuristic)

  • The file must be smaller than 49152 (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: 4d961091-e7db-51cf-b2b4-3f5a2dad88fb

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