YARA Detection Rule: PUA_VULN_Renamed_Driver_Sysinternalswwwsysinternalscom_Procexpsys_7795
Repository: Neo23x0/signature-base
Detects: Detects renamed vulnerable driver mentioned in LOLDrivers project using VersionInfo values from the PE header - procexp.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][PII_REDACTED][PII_REDACTED][PII_REDACTED][PII_REDACTED][PII_REDACTED][PII_REDACTED]0020 } /* FileDescription  */
		$ = { 0043006f006d[PII_REDACTED]6e0079004e0061006d0065[1-8][PII_REDACTED]730069006e[PII_REDACTED]72006e0061006c[PII_REDACTED]2d[PII_REDACTED]770077002e[PII_REDACTED]730069006e[PII_REDACTED]72006e0061006c0073002e0063006f006d } /* CompanyName Sysinternalswwwsysinternalscom */
		$ = {[PII_REDACTED]6c[PII_REDACTED][PII_REDACTED]0069006f006e[1-8][PII_REDACTED]2e00300030 } /* FileVersion  */
		$ = {[PII_REDACTED]6f[PII_REDACTED][PII_REDACTED][PII_REDACTED]730069006f006e[1-8][PII_REDACTED]2e00300030 } /* ProductVersion  */
		$ = { 0049006e[PII_REDACTED]72006e0061006c004e0061006d0065[1-8][PII_REDACTED]6f[PII_REDACTED]780070002e[PII_REDACTED]73 } /* InternalName procexpsys */
		$ = {[PII_REDACTED]6f[PII_REDACTED]630074004e0061006d0065[1-8][PII_REDACTED][PII_REDACTED][PII_REDACTED][PII_REDACTED][PII_REDACTED][PII_REDACTED]0020 } /* ProductName  */
		$ = { 004f[PII_REDACTED]670069006e0061006c[PII_REDACTED]6c0065006e0061006d0065[1-8][PII_REDACTED]6f0063006

Detection condition:
uint16(0) == 0x5a4d and filesize < 100KB and all of them and not filename matches /procexp/i

Full rule:
rule PUA_VULN_Renamed_Driver_Sysinternalswwwsysinternalscom_Procexpsys_7795 {
	meta:
		description = "Detects renamed vulnerable driver mentioned in LOLDrivers project using VersionInfo values from the PE header - procexp.Sys"
		author = "Florian Roth"
		reference = "https://github.com/magicsword-io/LOLDrivers"
		hash = "77950e2a40ac0447ae7ee1ee3ef1242ce22796a157074e6f04e345b1956e143c"
		date = "2024-08-07"
		score = 70
		id = "dce72757-4557-559c-89d3-3c526628ccbd"
	strings:
		$ = {[PII_REDACTED]6c[PII_REDACTED][PII_REDACTED][PII_REDACTED][PII_REDACTED]006f006e[1-8][PII_REDACTED][PII_REDACTED][PII_REDACTED][PII_REDACTED][PII_REDACTED][PII_REDACTED]0020 } /* FileDescription  */
		$ = { 0043006f006d[PII_REDACTED]6e0079004e0061006d0065[1-8][PII_REDACTED]730069006e[PII_REDACTED]72006e0061006c[PII_REDACTED]2d[PII_REDACTED]770077002e[PII_REDACTED]730069006e[PII_REDACTED]72006e0061006c0073002e0063006f006d } /* CompanyName Sysinternalswwwsysinternalscom */
		$ = {[PII_REDACTED]6c[PII_REDACTED][PII_REDACTED]0069006f006e[1-8][PII_REDACTED]2e00300030 } /* FileVersion  */
		$ = {[PII_REDACTED]6f[PII_REDACTED][PII_REDACTED][PII_REDACTED]730069006f006e[1-8][PII_REDACTED]2e00300030 } /* ProductVersion  */
		$ = { 0049006e[PII_REDACTED]72006e0061006c004e0061006d0065[1-8][PII_REDACTED]6f[PII_REDACTED]780070002e[PII_REDACTED]73 } /* InternalName procexpsys */
		$ = {[PII_REDACTED]6f[PII_REDACTED]630074004e0061006d0065[1-8][PII_REDACTED][PII_REDACTED][PII_REDACTED][PII_REDACTED][PII_REDACTED][PII_REDACTED]0020 } /* ProductName  */
		$ = { 004f[PII_REDACTED]670069006e0061006c[PII_REDACTED]6c0065006e0061006d0065[1-8][PII_REDACTED]6f[PII_REDACTED]780070002e[PII_REDACTED]73 } /* OriginalFilename procexpSys */
		$ = { 004c[PII_REDACTED]61006c0043006f[PII_REDACTED][PII_REDACTED]00680074[1-8]0043006f[PII_REDACTED][PII_REDACTED][PII_REDACTED][PII_REDACTED][PII_REDACTED]4d[PII_REDACTED]6b[PII_REDACTED][PII_REDACTED]0069006e006f[PII_REDACTED][PII_REDACTED][PII_REDACTED]390036002d[PII_REDACTED]310034 } /* LegalCopyright CopyrightCMarkRussinovich */
	condition:
		uint16(0) == 0x5a4d and filesize < 100KB and all of them and not filename matches /procexp/i
}