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MALPEDIA_Win_Agendacrypt_Auto

autogenerated rule brought to you by yara-signator

MalwareAgendacryptMalpedia 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: Agendacrypt.

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

Summary generated from the rule's metadata and condition.

Rule source

win-agendacrypt-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Agendacrypt_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "f32548e8-d6b6-5ddb-8fba-1bbeef55cbbc"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.agendacrypt"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.agendacrypt_auto.yar#L1-L134"
		license_url = "N/A"
		logic_hash = "f293479bb07328906630a1bbbaedfa64198cff7a5f05989036ed1c27febacd22"
		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 = { c1ef14 0fa4d001 81e7ff070000 25ffff1f00 83c6ff 81d3ffff0f00 897c2404 }
		$sequence_1 = { e8???????? 83c40c 8b45ec 8907 895f04 c7470801000000 837dbc00 }
		$sequence_2 = { eb2d 31c9 837d1000 894df0 0f852efdffff c745e000000000 8b45e8 }
		$sequence_3 = { 8d8c2490000000 0fb69c24d0000000 8b442468 8b74246c 0fa4c609 c1e009 8d3cdd00000000 }
		$sequence_4 = { 895008 5d c3 55 89e5 8b4508 f20f100d???????? }
		$sequence_5 = { 8d4c3bff 39d1 0f83c4030000 8d47ff 8954240c 897c2414 89442428 }
		$sequence_6 = { c1e808 83f81f 7f1e 85c0 743d 83f816 0f85fe000000 }
		$sequence_7 = { ff30 e8???????? e9???????? 8b442434 f20f1044242c f20f1054241c f20f104c2424 }
		$sequence_8 = { a1???????? ff75d0 6a00 ff30 e8???????? 83c438 5e }
		$sequence_9 = { c745dca8935600 c745e001000000 c745e400000000 c745ec50675600 c745f000000000 68???????? 56 }

	condition:
		7 of them and filesize < 3340288
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ c1ef14 0fa4d001 81e7ff070000 25ffff1f00 83c6ff 81d3ffff0f00 897c2404 }
$sequence_1hex{ e8???????? 83c40c 8b45ec 8907 895f04 c7470801000000 837dbc00 }
$sequence_2hex{ eb2d 31c9 837d1000 894df0 0f852efdffff c745e000000000 8b45e8 }
$sequence_3hex{ 8d8c2490000000 0fb69c24d0000000 8b442468 8b74246c 0fa4c609 c1e009 8d3cdd00000000 }
$sequence_4hex{ 895008 5d c3 55 89e5 8b4508 f20f100d???????? }
$sequence_5hex{ 8d4c3bff 39d1 0f83c4030000 8d47ff 8954240c 897c2414 89442428 }
$sequence_6hex{ c1e808 83f81f 7f1e 85c0 743d 83f816 0f85fe000000 }
$sequence_7hex{ ff30 e8???????? e9???????? 8b442434 f20f1044242c f20f1054241c f20f104c2424 }
$sequence_8hex{ a1???????? ff75d0 6a00 ff30 e8???????? 83c438 5e }
$sequence_9hex{ c745dca8935600 c745e001000000 c745e400000000 c745ec50675600 c745f000000000 68???????? 56 }

Condition

7 of them and filesize < 3340288

In plain words (Heuristic)

  • The file must be smaller than 3340288 (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: f32548e8-d6b6-5ddb-8fba-1bbeef55cbbc

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