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MALPEDIA_Win_Covid22_Auto

autogenerated rule brought to you by yara-signator

MalwareCovid22Malpedia 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: Covid22.

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

Summary generated from the rule's metadata and condition.

Rule source

win-covid22-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Covid22_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "99a02a74-d0a3-533c-b448-35480cff51fc"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.covid22"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.covid22_auto.yar#L1-L119"
		license_url = "N/A"
		logic_hash = "968cf98e2e8c36cdb3ce45b1a5e5186c5425f3f25bc15cd333cdcc77eeba73ef"
		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 = { 8a4d78 83c40c f6c102 8975dc 897d08 }
		$sequence_1 = { 57 e8???????? 8d7438ff 3bf7 }
		$sequence_2 = { 8b3d???????? ffd7 8b4608 85c0 7403 50 ffd7 }
		$sequence_3 = { 33d9 81e3ff000000 c1e908 330c9df0904000 0fb65801 }
		$sequence_4 = { 89c3 83fb01 7532 ff35???????? }
		$sequence_5 = { e8???????? 8d0df4b14000 5a e8???????? 8b442414 e8???????? 50 }
		$sequence_6 = { 83c001 8bce c1e908 330c9df0904000 0fb618 33d9 }
		$sequence_7 = { 8d0d14b24000 e8???????? ba???????? 8d0d18b24000 e8???????? ba???????? }
		$sequence_8 = { c705????????0a4c4000 c705????????304c4000 c705????????01000000 837d1c00 7507 c7451c00904000 }
		$sequence_9 = { ba???????? 8d0d10b24000 e8???????? ba???????? 8d0d14b24000 }

	condition:
		7 of them and filesize < 1955840
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 8a4d78 83c40c f6c102 8975dc 897d08 }
$sequence_1hex{ 57 e8???????? 8d7438ff 3bf7 }
$sequence_2hex{ 8b3d???????? ffd7 8b4608 85c0 7403 50 ffd7 }
$sequence_3hex{ 33d9 81e3ff000000 c1e908 330c9df0904000 0fb65801 }
$sequence_4hex{ 89c3 83fb01 7532 ff35???????? }
$sequence_5hex{ e8???????? 8d0df4b14000 5a e8???????? 8b442414 e8???????? 50 }
$sequence_6hex{ 83c001 8bce c1e908 330c9df0904000 0fb618 33d9 }
$sequence_7hex{ 8d0d14b24000 e8???????? ba???????? 8d0d18b24000 e8???????? ba???????? }
$sequence_8hex{ c705????????0a4c4000 c705????????304c4000 c705????????01000000 837d1c00 7507 c7451c00904000 }
$sequence_9hex{ ba???????? 8d0d10b24000 e8???????? ba???????? 8d0d14b24000 }

Condition

7 of them and filesize < 1955840

In plain words (Heuristic)

  • The file must be smaller than 1955840 (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: 99a02a74-d0a3-533c-b448-35480cff51fc

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