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MALPEDIA_Win_Screencap_Auto

autogenerated rule brought to you by yara-signator

MalwareScreencapMalpedia 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: Screencap.

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

Summary generated from the rule's metadata and condition.

Rule source

win-screencap-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Screencap_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "c330655e-8db1-503c-b0f5-bd3d36e3ae9c"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.screencap"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.screencap_auto.yar#L1-L123"
		license_url = "N/A"
		logic_hash = "e2fba7936b94145a817d72ed995b006b5ea28dbc59b8ee8eeb93132ef484504e"
		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 = { b900040000 ff15???????? 488bf8 4885c0 747f 488d4c2452 }
		$sequence_1 = { 488bcb 666666660f1f840000000000 0fb68431a8f70000 48ffc1 88440c77 84c0 }
		$sequence_2 = { 4533c9 ff5018 85c0 0f88a4000000 488b0d???????? }
		$sequence_3 = { ff15???????? 488d0d3e380100 33d2 e8???????? 488d0d30380100 85c0 740c }
		$sequence_4 = { e8???????? 482be0 488b05???????? 4833c4 488985a01d0000 ff15???????? 483b05???????? }
		$sequence_5 = { e9???????? 488d1560ca0000 e9???????? 488d15eccb0000 e9???????? 488d15d0cb0000 e9???????? }
		$sequence_6 = { 8d8424c8000000 6854334700 50 e8???????? ffb424ec220000 8d8424da000000 }
		$sequence_7 = { 488b05???????? 4833c4 4889842400010000 488b0d???????? }
		$sequence_8 = { 488bd5 8bdf e8???????? 85ff 741c }
		$sequence_9 = { 4c8d4308 488d442420 4c2bc0 0fb610 420fb60c00 2bd1 }

	condition:
		7 of them and filesize < 1391616
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ b900040000 ff15???????? 488bf8 4885c0 747f 488d4c2452 }
$sequence_1hex{ 488bcb 666666660f1f840000000000 0fb68431a8f70000 48ffc1 88440c77 84c0 }
$sequence_2hex{ 4533c9 ff5018 85c0 0f88a4000000 488b0d???????? }
$sequence_3hex{ ff15???????? 488d0d3e380100 33d2 e8???????? 488d0d30380100 85c0 740c }
$sequence_4hex{ e8???????? 482be0 488b05???????? 4833c4 488985a01d0000 ff15???????? 483b05???????? }
$sequence_5hex{ e9???????? 488d1560ca0000 e9???????? 488d15eccb0000 e9???????? 488d15d0cb0000 e9???????? }
$sequence_6hex{ 8d8424c8000000 6854334700 50 e8???????? ffb424ec220000 8d8424da000000 }
$sequence_7hex{ 488b05???????? 4833c4 4889842400010000 488b0d???????? }
$sequence_8hex{ 488bd5 8bdf e8???????? 85ff 741c }
$sequence_9hex{ 4c8d4308 488d442420 4c2bc0 0fb610 420fb60c00 2bd1 }

Condition

7 of them and filesize < 1391616

In plain words (Heuristic)

  • The file must be smaller than 1391616 (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: c330655e-8db1-503c-b0f5-bd3d36e3ae9c

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