YARA Detection Rule: PUA_VULN_Renamed_Driver_Cyreninc_Amp_Cyrenamp_CBB8
Repository: Neo23x0/signature-base
Detects: Detects renamed vulnerable driver mentioned in LOLDrivers project using VersionInfo values from the PE header - amp.sys
Author: Florian Roth
Reference: https://github.com/magicsword-io/LOLDrivers

Pattern signatures:
$ = {[PII_REDACTED]6c[PII_REDACTED][PII_REDACTED][PII_REDACTED][PII_REDACTED]006f006e[1-8]0041004d[PII_REDACTED]4d0069006e[PII_REDACTED]69006c[PII_REDACTED]72 } /* FileDescription AMPMinifilter */
		$ = { 0043006f006d[PII_REDACTED]6e0079004e0061006d0065[1-8][PII_REDACTED]520045004e[PII_REDACTED]6e0063002e } /* CompanyName CYRENInc */
		$ = {[PII_REDACTED]6c[PII_REDACTED][PII_REDACTED]0069006f006e[1-8]0035002e0034002e[PII_REDACTED]2e0031 } /* FileVersion  */
		$ = {[PII_REDACTED]6f[PII_REDACTED][PII_REDACTED][PII_REDACTED]730069006f006e[1-8]0035002e0034002e[PII_REDACTED]2e0031 } /* ProductVersion  */
		$ = { 0049006e[PII_REDACTED]72006e0061006c004e0061006d0065[1-8]0041004d0050 } /* InternalName AMP */
		$ = {[PII_REDACTED]6f[PII_REDACTED]630074004e0061006d0065[1-8][PII_REDACTED]520045004e[PII_REDACTED]4d[PII_REDACTED]35 } /* ProductName CYRENAMP */
		$ = { 004f[PII_REDACTED]670069006e0061006c[PII_REDACTED]6c0065006e0061006d0065[1-8]0061006d0070002e[PII_REDACTED]73 } /* OriginalFilename ampsys */
		$ = { 004c[PII_REDACTED]61006c0043006f[PII_REDACTED][PII_REDACTED]00680074[1-8]0043006f[PII_REDACTED][PII_REDACTED]00680

Detection condition:
uint16(0) == 0x5a4d and filesize < 200KB and all of them and not filename matches /amp/i

Full rule:
rule PUA_VULN_Renamed_Driver_Cyreninc_Amp_Cyrenamp_CBB8 {
	meta:
		description = "Detects renamed vulnerable driver mentioned in LOLDrivers project using VersionInfo values from the PE header - amp.sys"
		author = "Florian Roth"
		reference = "https://github.com/magicsword-io/LOLDrivers"
		hash = "cbb8239a765bf5b2c1b6a5c8832d2cab8fef5deacadfb65d8ed43ef56d291ab6"
		date = "2024-08-07"
		score = 70
		id = "b964d59a-0fbf-56be-ae31-323431384cf2"
	strings:
		$ = {[PII_REDACTED]6c[PII_REDACTED][PII_REDACTED][PII_REDACTED][PII_REDACTED]006f006e[1-8]0041004d[PII_REDACTED]4d0069006e[PII_REDACTED]69006c[PII_REDACTED]72 } /* FileDescription AMPMinifilter */
		$ = { 0043006f006d[PII_REDACTED]6e0079004e0061006d0065[1-8][PII_REDACTED]520045004e[PII_REDACTED]6e0063002e } /* CompanyName CYRENInc */
		$ = {[PII_REDACTED]6c[PII_REDACTED][PII_REDACTED]0069006f006e[1-8]0035002e0034002e[PII_REDACTED]2e0031 } /* FileVersion  */
		$ = {[PII_REDACTED]6f[PII_REDACTED][PII_REDACTED][PII_REDACTED]730069006f006e[1-8]0035002e0034002e[PII_REDACTED]2e0031 } /* ProductVersion  */
		$ = { 0049006e[PII_REDACTED]72006e0061006c004e0061006d0065[1-8]0041004d0050 } /* InternalName AMP */
		$ = {[PII_REDACTED]6f[PII_REDACTED]630074004e0061006d0065[1-8][PII_REDACTED]520045004e[PII_REDACTED]4d[PII_REDACTED]35 } /* ProductName CYRENAMP */
		$ = { 004f[PII_REDACTED]670069006e0061006c[PII_REDACTED]6c0065006e0061006d0065[1-8]0061006d0070002e[PII_REDACTED]73 } /* OriginalFilename ampsys */
		$ = { 004c[PII_REDACTED]61006c0043006f[PII_REDACTED][PII_REDACTED]00680074[1-8]0043006f[PII_REDACTED][PII_REDACTED][PII_REDACTED]2000a[PII_REDACTED][PII_REDACTED]90020002d[PII_REDACTED][PII_REDACTED]002e[PII_REDACTED][PII_REDACTED]004e[PII_REDACTED]6e0063002e[PII_REDACTED]6c006c[PII_REDACTED][PII_REDACTED][PII_REDACTED][PII_REDACTED][PII_REDACTED][PII_REDACTED]0064002e } /* LegalCopyright CopyrightCYRENIncAllrightsreserved */
	condition:
		uint16(0) == 0x5a4d and filesize < 200KB and all of them and not filename matches /amp/i
}