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MALPEDIA_Win_Zlob_Auto

autogenerated rule brought to you by yara-signator

MalwareZlobMalpedia 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: Zlob.

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

Summary generated from the rule's metadata and condition.

Rule source

win-zlob-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Zlob_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "1b045870-3579-5b37-8649-8502496e8dd8"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.zlob"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.zlob_auto.yar#L1-L131"
		license_url = "N/A"
		logic_hash = "53c3fe91e6079d14e63606f225d38c0173ddfe4ceefd38ebdb6c4dc75eee82af"
		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 = { ff15???????? 83c40c ffd3 ffd3 ffd6 ffd7 }
		$sequence_1 = { ffd6 ffd6 ffd5 6a10 8d442420 6a00 50 }
		$sequence_2 = { ffd6 ffd7 ffd6 ffd6 ffd7 8d85f0feffff 50 }
		$sequence_3 = { ffd7 ffd6 ffd6 ffd7 ffb4242c010000 ff15???????? }
		$sequence_4 = { eb5b 807c241c00 7408 3b4510 7303 894510 ffd3 }
		$sequence_5 = { ffd7 8d45c4 50 ff15???????? 85c0 7511 8d45c4 }
		$sequence_6 = { 83c504 8b4500 8bcd ff5018 85c0 0f8ee8000000 }
		$sequence_7 = { c68503ffffff30 c68504ffffff66 c68505ffffff38 c68506ffffff2d c68507ffffff39 c68508ffffff34 c68509ffffff34 }
		$sequence_8 = { 83c424 6a00 6800000080 6a03 6a00 6a01 68000000c0 }
		$sequence_9 = { f645fc20 7504 b001 c9 c3 32c0 c9 }

	condition:
		7 of them and filesize < 98304
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ ff15???????? 83c40c ffd3 ffd3 ffd6 ffd7 }
$sequence_1hex{ ffd6 ffd6 ffd5 6a10 8d442420 6a00 50 }
$sequence_2hex{ ffd6 ffd7 ffd6 ffd6 ffd7 8d85f0feffff 50 }
$sequence_3hex{ ffd7 ffd6 ffd6 ffd7 ffb4242c010000 ff15???????? }
$sequence_4hex{ eb5b 807c241c00 7408 3b4510 7303 894510 ffd3 }
$sequence_5hex{ ffd7 8d45c4 50 ff15???????? 85c0 7511 8d45c4 }
$sequence_6hex{ 83c504 8b4500 8bcd ff5018 85c0 0f8ee8000000 }
$sequence_7hex{ c68503ffffff30 c68504ffffff66 c68505ffffff38 c68506ffffff2d c68507ffffff39 c68508ffffff34 c68509ffffff34 }
$sequence_8hex{ 83c424 6a00 6800000080 6a03 6a00 6a01 68000000c0 }
$sequence_9hex{ f645fc20 7504 b001 c9 c3 32c0 c9 }

Condition

7 of them and filesize < 98304

In plain words (Heuristic)

  • The file must be smaller than 98304 (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: 1b045870-3579-5b37-8649-8502496e8dd8

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