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MALPEDIA_Win_8Base_Auto

autogenerated rule brought to you by yara-signator

Malware8BaseMalpedia 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: 8Base.

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

Summary generated from the rule's metadata and condition.

Rule source

win-8base-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_8Base_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "c4b48847-5291-521d-93fb-9294f21140e6"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.8base"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.8base_auto.yar#L1-L119"
		license_url = "N/A"
		logic_hash = "b47a40948bded147073cdef65076e2a74aedf9d527ccdea9c267a440037e5b0f"
		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 = { 6a00 ff15???????? 8d8e04a2feff 81f98c230000 770b }
		$sequence_1 = { 8b5104 8b4c2408 c74432f45c394000 5e }
		$sequence_2 = { 8815???????? c605????????6f 880d???????? c605????????65 c605????????63 }
		$sequence_3 = { 8d3485c0289100 8b06 83e71f c1e706 03c7 8a5824 }
		$sequence_4 = { c684249c00000002 50 c7442410043a4000 e8???????? }
		$sequence_5 = { d3ea 89542414 8b442434 01442414 8b442424 31442410 }
		$sequence_6 = { ff15???????? 8b442414 40 3d???????? 89442414 0f8c0effffff 8b35???????? }
		$sequence_7 = { 8bf7 83e61f c1e606 033485c0289100 c745e401000000 }
		$sequence_8 = { 6689442416 33c9 668954241a 8d442434 50 66894c241c 8b4c241c }
		$sequence_9 = { 899c24ac000000 3bfb 7449 8b8424b8000000 56 8d742418 }

	condition:
		7 of them and filesize < 10838016
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 6a00 ff15???????? 8d8e04a2feff 81f98c230000 770b }
$sequence_1hex{ 8b5104 8b4c2408 c74432f45c394000 5e }
$sequence_2hex{ 8815???????? c605????????6f 880d???????? c605????????65 c605????????63 }
$sequence_3hex{ 8d3485c0289100 8b06 83e71f c1e706 03c7 8a5824 }
$sequence_4hex{ c684249c00000002 50 c7442410043a4000 e8???????? }
$sequence_5hex{ d3ea 89542414 8b442434 01442414 8b442424 31442410 }
$sequence_6hex{ ff15???????? 8b442414 40 3d???????? 89442414 0f8c0effffff 8b35???????? }
$sequence_7hex{ 8bf7 83e61f c1e606 033485c0289100 c745e401000000 }
$sequence_8hex{ 6689442416 33c9 668954241a 8d442434 50 66894c241c 8b4c241c }
$sequence_9hex{ 899c24ac000000 3bfb 7449 8b8424b8000000 56 8d742418 }

Condition

7 of them and filesize < 10838016

In plain words (Heuristic)

  • The file must be smaller than 10838016 (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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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: c4b48847-5291-521d-93fb-9294f21140e6

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