Backdoor_Win32_Zegost_EA_bit

YARA detection rule by roadwy

Backdoor:Win32/Zegost.EA!bit,SIGNATURE_TYPE_PEHSTR_EXT,05 00 05 00 06 00 00

rule Backdoor_Win32_Zegost_EA_bit{
	meta:
		description = "Backdoor:Win32/Zegost.EA!bit,SIGNATURE_TYPE_PEHSTR_EXT,05 00 05 00 06 00 00 "
		
	strings :
		$a_03_0 = {c6 01 c3 8d 55 ?? 52 68 20 01 00 00 8b 45 ?? 50 8b 4d ?? 51 ff 15 ?? ?? 41 00 } 		$a_03_1 = {83 c4 04 c6 85 ?? ?? ?? ff 33 c6 85 ?? ?? ?? ff 36 c6 85 ?? ?? ?? ff 30 c6 85 ?? ?? ?? ff 6e c6 85 ?? ?? ?? ff 65 c6 85 ?? ?? ?? ff 74 c6 85 ?? ?? ?? ff 6d c6 85 ?? ?? ?? ff 61 c6 85 ?? ?? ?? ff 6e c6 85 ?? ?? ?? ff 2e c6 85 ?? ?? ?? ff 65 c6 85 ?? ?? ?? ff 78 c6 85 ?? ?? ?? ff 65 c6 85 ?? ?? ?? ff 00 } 		$a_03_2 = {85 c0 0f 85 ?? ?? 00 00 c6 45 ?? 43 c6 45 ?? 3a c6 45 ?? 5c c6 45 ?? 57 c6 45 ?? 69 c6 45 ?? 6e c6 45 ?? 64 c6 45 ?? 6f c6 45 ?? 77 c6 45 ?? 73 c6 45 ?? 5c c6 45 ?? 73 c6 45 ?? 76 c6 45 ?? 63 c6 45 ?? 68 c6 45 ?? 6f c6 45 ?? 73 c6 45 ?? 74 c6 45 ?? 31 c6 45 ?? 2e c6 45 ?? 65 c6 45 ?? 78 c6 45 ?? 65 c6 45 ?? 00 } 		$a_01_3 = {6e 75 52 5c 6e 6f 69 73 72 65 56 74 6e 65 72 72 75 43 5c 73 77 6f 64 6e 69 57 5c 74 66 6f 73 6f 72 63 69 4d 5c 65 72 61 77 74 66 6f 53 } 		$a_01_4 = {41 78 45 65 75 6c 61 56 74 65 53 67 65 52 } 		$a_01_5 = {43 3a 5c 57 69 6e 64 6f 77 73 5c 53 79 73 74 65 6d 33 32 5c 77 73 63 72 69 70 74 2e 65 78 65 } 	condition:
		((#a_03_0  & 1)*1+(#a_03_1  & 1)*1+(#a_03_2  & 1)*1+(#a_01_3  & 1)*1+(#a_01_4  & 1)*1+(#a_01_5  & 1)*1) >=5
 
}

[[ currentRule.title && currentRule.title.length > 60 ? currentRule.title.slice(0, 60) + '…' : currentRule.title ]]

322e280f-0b51-495c-88b7-68a36479b2ac

Propose edits, view related rules, and engage with the community through comments.

Executable code, not a declarative rule

This submission is arbitrary [[ currentRule.format ? currentRule.format.toUpperCase() : '' ]] code, not a declarative detection rule — review it as you would any script before running it, and note that it cannot be safely aggregated or auto-executed alongside YARA/Sigma/Suricata/CRS rules.

Rejected pattern present

[[ reason ]]

What does this mean?

Format & documentation suggestions

Not a security issue — this rule is valid and was accepted as-is. These are optional fields/conventions its own format recommends, mainly affecting its quality score and how well it documents itself for other reviewers.

[[ reason ]]

What do these messages mean?

[[ currentRule.title && currentRule.title.length > 60 ? currentRule.title.slice(0, 60) + '…' : currentRule.title ]]

[[ currentRule.title ]]

Community Discussion