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MALPEDIA_Win_Corebot_Auto

autogenerated rule brought to you by yara-signator

MalwareCorebotMalpedia 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: Corebot.

It defines 16 patterns (0 text, 16 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

win-corebot-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Corebot_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "1723e0b5-2dab-5f71-9fd6-15428095eba6"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.corebot"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.corebot_auto.yar#L1-L163"
		license_url = "N/A"
		logic_hash = "bddd32fd592a01329ed3fdb297d89b24412a75d1af8c5ce6d6d329923dbc9b66"
		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 = { be07000000 8d4801 894dd8 0fb600 8945e8 }
		$sequence_1 = { 83e601 31c0 40 8932 }
		$sequence_2 = { 31c0 83fe18 72ee 39fe }
		$sequence_3 = { e8???????? 83c404 29f7 01f3 }
		$sequence_4 = { 55 89e5 56 8b31 85f6 7410 89f1 }
		$sequence_5 = { c745ec07000000 8d0412 84d2 8945e8 }
		$sequence_6 = { 01f3 8b75ec 56 8945f0 50 57 53 }
		$sequence_7 = { 50 57 53 e8???????? 83c410 83f8ff }
		$sequence_8 = { eb10 6800800000 6a00 56 }
		$sequence_9 = { ff764c ff15???????? 8d4634 50 ff15???????? 8d4e0c e8???????? }
		$sequence_10 = { 85ff 740f 57 ff7508 }
		$sequence_11 = { ff15???????? 807e5000 7509 ff764c ff15???????? 8d4634 }
		$sequence_12 = { ff742420 ff742428 e8???????? 8b442424 8d4c2410 }
		$sequence_13 = { 807e5800 7509 ff7654 ff15???????? 807e5000 7509 }
		$sequence_14 = { ff7010 ff7014 e8???????? 8b45e0 }
		$sequence_15 = { 85c0 7515 8b4624 3b4620 }

	condition:
		7 of them and filesize < 1302528
}

Strings (16 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ be07000000 8d4801 894dd8 0fb600 8945e8 }
$sequence_1hex{ 83e601 31c0 40 8932 }
$sequence_2hex{ 31c0 83fe18 72ee 39fe }
$sequence_3hex{ e8???????? 83c404 29f7 01f3 }
$sequence_4hex{ 55 89e5 56 8b31 85f6 7410 89f1 }
$sequence_5hex{ c745ec07000000 8d0412 84d2 8945e8 }
$sequence_6hex{ 01f3 8b75ec 56 8945f0 50 57 53 }
$sequence_7hex{ 50 57 53 e8???????? 83c410 83f8ff }
$sequence_8hex{ eb10 6800800000 6a00 56 }
$sequence_9hex{ ff764c ff15???????? 8d4634 50 ff15???????? 8d4e0c e8???????? }
$sequence_10hex{ 85ff 740f 57 ff7508 }
$sequence_11hex{ ff15???????? 807e5000 7509 ff764c ff15???????? 8d4634 }
$sequence_12hex{ ff742420 ff742428 e8???????? 8b442424 8d4c2410 }
$sequence_13hex{ 807e5800 7509 ff7654 ff15???????? 807e5000 7509 }
$sequence_14hex{ ff7010 ff7014 e8???????? 8b45e0 }
$sequence_15hex{ 85c0 7515 8b4624 3b4620 }

Condition

7 of them and filesize < 1302528

In plain words (Heuristic)

  • The file must be smaller than 1302528 (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: 1723e0b5-2dab-5f71-9fd6-15428095eba6

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