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MALPEDIA_Win_Misha_Auto

autogenerated rule brought to you by yara-signator

MalwareMishaMalpedia 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: Misha.

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

Summary generated from the rule's metadata and condition.

Rule source

win-misha-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Misha_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "57a86f97-0226-57cc-b18e-fd683342e34c"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.misha"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.misha_auto.yar#L1-L131"
		license_url = "N/A"
		logic_hash = "b455493573aed00c54386916fa074b0978e9f408f42bd4d3861eacb866a330b6"
		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 = { 894df0 8b4d90 83c104 ff75f0 8b45b4 e8???????? 59 }
		$sequence_1 = { 59 39551c 7409 ff751c e8???????? 59 5d }
		$sequence_2 = { ff7508 ff75cc e8???????? 83c410 8945b0 837d2402 7520 }
		$sequence_3 = { 8d45f4 50 6a28 e8???????? 59 59 85c0 }
		$sequence_4 = { 8b45d8 6bc038 8b4b18 8d440120 50 ff7324 8b45e8 }
		$sequence_5 = { 8b4df8 8908 8b4510 8b4d0c 894808 8b45f8 8b4008 }
		$sequence_6 = { ff5168 85c0 8b45f8 8b08 50 0f99c3 }
		$sequence_7 = { c785acfeffff1b1b1b1b c785b0feffff1b1b1b1b c785b4feffff1b1b1b1b 66c785b8feffff1b1b c685bafeffff1c }
		$sequence_8 = { b84d5a0000 663901 755a 8b413c 8d90f8000000 39542404 7c4b }
		$sequence_9 = { ff75dc 6a08 59 e8???????? 83c420 0fb6c0 85c0 }

	condition:
		7 of them and filesize < 710656
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 894df0 8b4d90 83c104 ff75f0 8b45b4 e8???????? 59 }
$sequence_1hex{ 59 39551c 7409 ff751c e8???????? 59 5d }
$sequence_2hex{ ff7508 ff75cc e8???????? 83c410 8945b0 837d2402 7520 }
$sequence_3hex{ 8d45f4 50 6a28 e8???????? 59 59 85c0 }
$sequence_4hex{ 8b45d8 6bc038 8b4b18 8d440120 50 ff7324 8b45e8 }
$sequence_5hex{ 8b4df8 8908 8b4510 8b4d0c 894808 8b45f8 8b4008 }
$sequence_6hex{ ff5168 85c0 8b45f8 8b08 50 0f99c3 }
$sequence_7hex{ c785acfeffff1b1b1b1b c785b0feffff1b1b1b1b c785b4feffff1b1b1b1b 66c785b8feffff1b1b c685bafeffff1c }
$sequence_8hex{ b84d5a0000 663901 755a 8b413c 8d90f8000000 39542404 7c4b }
$sequence_9hex{ ff75dc 6a08 59 e8???????? 83c420 0fb6c0 85c0 }

Condition

7 of them and filesize < 710656

In plain words (Heuristic)

  • The file must be smaller than 710656 (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: 57a86f97-0226-57cc-b18e-fd683342e34c

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