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MALPEDIA_Win_Backconfig_Auto

autogenerated rule brought to you by yara-signator

MalwareBackconfigMalpedia 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: Backconfig.

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

Summary generated from the rule's metadata and condition.

Rule source

win-backconfig-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Backconfig_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "18fd149c-ad9b-5433-8651-ac1dcd92de05"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.backconfig"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.backconfig_auto.yar#L1-L127"
		license_url = "N/A"
		logic_hash = "dc29e43fa81d60d5f53e6f4d5e158937c417e8f12650929b20d71338a8cb5ead"
		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 = { a1???????? 8b0d???????? 8b15???????? 8985f0feffff a1???????? 6a51 8985fcfeffff }
		$sequence_1 = { e8???????? 8b4de4 83c40c 6bc930 8975e0 8db1682a4100 }
		$sequence_2 = { 8a15???????? 8d8569ffffff 6a00 50 898d64ffffff 889568ffffff }
		$sequence_3 = { c1f805 8d1485c0504100 8b0a 83e61f c1e606 03ce }
		$sequence_4 = { 8bc3 c1f805 8d3c85c0504100 8bf3 83e61f c1e606 8b07 }
		$sequence_5 = { 8b0d???????? 8b15???????? 8985f0feffff a1???????? 6a51 8985fcfeffff 898df4feffff }
		$sequence_6 = { 8d8d2cfdffff 68???????? 51 e8???????? 83c414 68401f0000 }
		$sequence_7 = { 6a00 50 898d64ffffff 889568ffffff e8???????? }
		$sequence_8 = { 8bf1 83e61f 8d3c85c0504100 8b07 c1e606 f644300401 7436 }
		$sequence_9 = { 8bec 8b4508 56 8d34c550224100 833e00 7513 }

	condition:
		7 of them and filesize < 217088
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ a1???????? 8b0d???????? 8b15???????? 8985f0feffff a1???????? 6a51 8985fcfeffff }
$sequence_1hex{ e8???????? 8b4de4 83c40c 6bc930 8975e0 8db1682a4100 }
$sequence_2hex{ 8a15???????? 8d8569ffffff 6a00 50 898d64ffffff 889568ffffff }
$sequence_3hex{ c1f805 8d1485c0504100 8b0a 83e61f c1e606 03ce }
$sequence_4hex{ 8bc3 c1f805 8d3c85c0504100 8bf3 83e61f c1e606 8b07 }
$sequence_5hex{ 8b0d???????? 8b15???????? 8985f0feffff a1???????? 6a51 8985fcfeffff 898df4feffff }
$sequence_6hex{ 8d8d2cfdffff 68???????? 51 e8???????? 83c414 68401f0000 }
$sequence_7hex{ 6a00 50 898d64ffffff 889568ffffff e8???????? }
$sequence_8hex{ 8bf1 83e61f 8d3c85c0504100 8b07 c1e606 f644300401 7436 }
$sequence_9hex{ 8bec 8b4508 56 8d34c550224100 833e00 7513 }

Condition

7 of them and filesize < 217088

In plain words (Heuristic)

  • The file must be smaller than 217088 (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: 18fd149c-ad9b-5433-8651-ac1dcd92de05

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