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MALPEDIA_Win_Betabot_Auto

autogenerated rule brought to you by yara-signator

MalwareBetabotMalpedia 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: Betabot.

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

Summary generated from the rule's metadata and condition.

Rule source

win-betabot-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Betabot_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "4c076032-3f8d-5a2f-be4d-e46ded9d6a18"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.betabot"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.betabot_auto.yar#L1-L129"
		license_url = "N/A"
		logic_hash = "18b066d2f259a69e2bef9b19793adbc94154a31379a7529dc2c96438387b144f"
		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 = { 56 bb90000000 53 50 e8???????? a1???????? }
		$sequence_1 = { 8365e800 8365fc00 8365e400 8365ec00 8365f800 }
		$sequence_2 = { 8b461c 8945f8 58 5e 56 50 8b7508 }
		$sequence_3 = { 56 e8???????? 8935???????? 8bc6 5e c9 c3 }
		$sequence_4 = { ff7508 a4 895dfc ff15???????? 8bf0 83feff }
		$sequence_5 = { ff15???????? 85c0 740b 43 83c628 83fb0c 72e7 }
		$sequence_6 = { a1???????? 85c0 740b 8d4dfc 51 ff7508 ffd0 }
		$sequence_7 = { 50 33ff 56 47 56 895df8 }
		$sequence_8 = { 8985e4feffff eb11 8b85e4feffff 2de8030000 8985e4feffff 6a18 e8???????? }
		$sequence_9 = { 743e 6880000000 50 8d4580 50 e8???????? 8b450c }

	condition:
		7 of them and filesize < 835584
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 56 bb90000000 53 50 e8???????? a1???????? }
$sequence_1hex{ 8365e800 8365fc00 8365e400 8365ec00 8365f800 }
$sequence_2hex{ 8b461c 8945f8 58 5e 56 50 8b7508 }
$sequence_3hex{ 56 e8???????? 8935???????? 8bc6 5e c9 c3 }
$sequence_4hex{ ff7508 a4 895dfc ff15???????? 8bf0 83feff }
$sequence_5hex{ ff15???????? 85c0 740b 43 83c628 83fb0c 72e7 }
$sequence_6hex{ a1???????? 85c0 740b 8d4dfc 51 ff7508 ffd0 }
$sequence_7hex{ 50 33ff 56 47 56 895df8 }
$sequence_8hex{ 8985e4feffff eb11 8b85e4feffff 2de8030000 8985e4feffff 6a18 e8???????? }
$sequence_9hex{ 743e 6880000000 50 8d4580 50 e8???????? 8b450c }

Condition

7 of them and filesize < 835584

In plain words (Heuristic)

  • The file must be smaller than 835584 (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: 4c076032-3f8d-5a2f-be4d-e46ded9d6a18

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