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MALPEDIA_Win_Misfox_Auto

autogenerated rule brought to you by yara-signator

MalwareMisfoxMalpedia 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: Misfox.

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

Summary generated from the rule's metadata and condition.

Rule source

win-misfox-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Misfox_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "ad4a465e-502d-557b-9df0-0d09a5d58c98"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.misfox"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.misfox_auto.yar#L1-L174"
		license_url = "N/A"
		logic_hash = "f0284d77322fd81fc80799ff8b17c387a5c86ef9b47522a47cced1f49d8f1bd3"
		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 = { ddd8 db2d???????? b801000000 833d????????00 0f8536510000 }
		$sequence_1 = { 8bf7 8906 8d7604 40 3d00010000 7cf3 c745fc00000000 }
		$sequence_2 = { 8d44241c 50 6a01 8d442420 50 8d442440 50 }
		$sequence_3 = { 8b0c8550870110 8b8524e5ffff f644080480 0f8475030000 8b9530e5ffff 33ff 89bd34e5ffff }
		$sequence_4 = { c3 8bc1 85f6 7409 }
		$sequence_5 = { 7f0a b80a000000 5e 8be5 5d c3 53 }
		$sequence_6 = { ff74241c ffd6 85c0 7560 8b3d???????? }
		$sequence_7 = { 83e908 8d7608 660fd60f 8d7f08 8b048d08410010 }
		$sequence_8 = { 488d4dff ba00020000 c745cb00020000 448975c7 }
		$sequence_9 = { e8???????? 8b430c 4c8d6708 894308 8b470c }
		$sequence_10 = { 488bc3 488b5c2430 4883c420 5f c3 488d0d4c6f0100 }
		$sequence_11 = { 48837d0810 4c0f434df0 488d4d10 48837d2810 480f434d10 8b4500 }
		$sequence_12 = { eb15 413bc4 753e 0fb65530 0fb64531 }
		$sequence_13 = { 8d41fa 83f801 7774 488b4dbf ff15???????? 83f826 }
		$sequence_14 = { 488bc3 488bfb 48c1ff05 4c8d3526d20000 83e01f 486bf058 498b04fe }
		$sequence_15 = { 4833c4 48894547 488d0d615f0100 ff15???????? 488d4def ba00080000 }

	condition:
		7 of them and filesize < 266240
}

Strings (16 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ ddd8 db2d???????? b801000000 833d????????00 0f8536510000 }
$sequence_1hex{ 8bf7 8906 8d7604 40 3d00010000 7cf3 c745fc00000000 }
$sequence_2hex{ 8d44241c 50 6a01 8d442420 50 8d442440 50 }
$sequence_3hex{ 8b0c8550870110 8b8524e5ffff f644080480 0f8475030000 8b9530e5ffff 33ff 89bd34e5ffff }
$sequence_4hex{ c3 8bc1 85f6 7409 }
$sequence_5hex{ 7f0a b80a000000 5e 8be5 5d c3 53 }
$sequence_6hex{ ff74241c ffd6 85c0 7560 8b3d???????? }
$sequence_7hex{ 83e908 8d7608 660fd60f 8d7f08 8b048d08410010 }
$sequence_8hex{ 488d4dff ba00020000 c745cb00020000 448975c7 }
$sequence_9hex{ e8???????? 8b430c 4c8d6708 894308 8b470c }
$sequence_10hex{ 488bc3 488b5c2430 4883c420 5f c3 488d0d4c6f0100 }
$sequence_11hex{ 48837d0810 4c0f434df0 488d4d10 48837d2810 480f434d10 8b4500 }
$sequence_12hex{ eb15 413bc4 753e 0fb65530 0fb64531 }
$sequence_13hex{ 8d41fa 83f801 7774 488b4dbf ff15???????? 83f826 }
$sequence_14hex{ 488bc3 488bfb 48c1ff05 4c8d3526d20000 83e01f 486bf058 498b04fe }
$sequence_15hex{ 4833c4 48894547 488d0d615f0100 ff15???????? 488d4def ba00080000 }

Condition

7 of them and filesize < 266240

In plain words (Heuristic)

  • The file must be smaller than 266240 (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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Drop a file here or click to chooseScanned locally with YARA-X. Files up to 200 MB.

Open in editor

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: ad4a465e-502d-557b-9df0-0d09a5d58c98

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