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MALPEDIA_Win_Zitmo_Auto

autogenerated rule brought to you by yara-signator

MalwareZitmoMalpedia 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: Zitmo.

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

Summary generated from the rule's metadata and condition.

Rule source

win-zitmo-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Zitmo_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "abf7d489-428c-576b-bf50-6d5176838935"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.zitmo"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.zitmo_auto.yar#L1-L118"
		license_url = "N/A"
		logic_hash = "af492533d6f46a2ad9ae3961738d77dc030c3e8231bbc6ee80a9ef330be7fcfa"
		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 = { 23cb 8bd6 ff75a0 e8???????? }
		$sequence_1 = { 55 8bec 81c434ffffff f7df 8bf0 49 }
		$sequence_2 = { 8175b437340000 23f9 f7d1 03d7 f7d2 }
		$sequence_3 = { 4b f7de c745bc36343335 03c3 f7da f7d1 }
		$sequence_4 = { ffb584feffff 56 e8???????? ffb574ffffff }
		$sequence_5 = { f7df 894da8 8955d0 ffb560feffff e8???????? c9 }
		$sequence_6 = { f7d7 ff45b4 8bcf f7d6 03fa 8d9568ffffff }
		$sequence_7 = { 81759437320000 3145b8 41 23c6 }
		$sequence_8 = { 42 4e f7df 03d7 48 40 }
		$sequence_9 = { 23cb 4a f7d0 8955c4 c9 c20c00 55 }

	condition:
		7 of them and filesize < 843776
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 23cb 8bd6 ff75a0 e8???????? }
$sequence_1hex{ 55 8bec 81c434ffffff f7df 8bf0 49 }
$sequence_2hex{ 8175b437340000 23f9 f7d1 03d7 f7d2 }
$sequence_3hex{ 4b f7de c745bc36343335 03c3 f7da f7d1 }
$sequence_4hex{ ffb584feffff 56 e8???????? ffb574ffffff }
$sequence_5hex{ f7df 894da8 8955d0 ffb560feffff e8???????? c9 }
$sequence_6hex{ f7d7 ff45b4 8bcf f7d6 03fa 8d9568ffffff }
$sequence_7hex{ 81759437320000 3145b8 41 23c6 }
$sequence_8hex{ 42 4e f7df 03d7 48 40 }
$sequence_9hex{ 23cb 4a f7d0 8955c4 c9 c20c00 55 }

Condition

7 of them and filesize < 843776

In plain words (Heuristic)

  • The file must be smaller than 843776 (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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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: abf7d489-428c-576b-bf50-6d5176838935

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