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MALPEDIA_Win_Erebus_Auto

autogenerated rule brought to you by yara-signator

MalwareErebusMalpedia 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: Erebus.

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

Summary generated from the rule's metadata and condition.

Rule source

win-erebus-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Erebus_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "b55f6d61-5516-52a8-9f11-bbc6c3256406"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.erebus"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.erebus_auto.yar#L1-L134"
		license_url = "N/A"
		logic_hash = "58a7097f7d645c280477f955a2776e0b140b8f1b0ba314c39e5de6941820eb32"
		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 = { 57 ff750c e8???????? 83c41c 8d4c246c ffb424b4000000 ffb424bc000000 }
		$sequence_1 = { 83fa40 7707 ba40000000 eb19 8d42ff 8d4c241c 8944241c }
		$sequence_2 = { 7433 8b07 83f81d 7d2c 83f81a 7c06 837d0c04 }
		$sequence_3 = { e8???????? 83c404 c645fc06 83bd14ffffff10 c745c00f000000 c745bc00000000 c645ac00 }
		$sequence_4 = { c741140f000000 c7411000000000 50 c60100 e8???????? 8d8d30ffffff e8???????? }
		$sequence_5 = { ff35???????? 50 e8???????? ff35???????? e8???????? 83c404 8d045b }
		$sequence_6 = { 68???????? c744241000000000 c705????????402b4f00 e8???????? 83c404 8b442414 8b4c2418 }
		$sequence_7 = { 8d44240c c644245c00 50 c7442410a0fb4f00 e8???????? 8b4c2450 64890d00000000 }
		$sequence_8 = { 2142fc 5b 5f 5e c20400 68???????? e8???????? }
		$sequence_9 = { 8bcb 6a00 8b4014 ffd0 8b7510 8d4c2478 0fb6c0 }

	condition:
		7 of them and filesize < 2564096
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 57 ff750c e8???????? 83c41c 8d4c246c ffb424b4000000 ffb424bc000000 }
$sequence_1hex{ 83fa40 7707 ba40000000 eb19 8d42ff 8d4c241c 8944241c }
$sequence_2hex{ 7433 8b07 83f81d 7d2c 83f81a 7c06 837d0c04 }
$sequence_3hex{ e8???????? 83c404 c645fc06 83bd14ffffff10 c745c00f000000 c745bc00000000 c645ac00 }
$sequence_4hex{ c741140f000000 c7411000000000 50 c60100 e8???????? 8d8d30ffffff e8???????? }
$sequence_5hex{ ff35???????? 50 e8???????? ff35???????? e8???????? 83c404 8d045b }
$sequence_6hex{ 68???????? c744241000000000 c705????????402b4f00 e8???????? 83c404 8b442414 8b4c2418 }
$sequence_7hex{ 8d44240c c644245c00 50 c7442410a0fb4f00 e8???????? 8b4c2450 64890d00000000 }
$sequence_8hex{ 2142fc 5b 5f 5e c20400 68???????? e8???????? }
$sequence_9hex{ 8bcb 6a00 8b4014 ffd0 8b7510 8d4c2478 0fb6c0 }

Condition

7 of them and filesize < 2564096

In plain words (Heuristic)

  • The file must be smaller than 2564096 (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: b55f6d61-5516-52a8-9f11-bbc6c3256406

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