Create mal_perfctl_oct24.yar

Author: Neo23x0

yara/mal_perfctl_oct24.yar

@@ -0,0 +1,40 @@
+
+rule MAL_EXPL_Perfctl_Oct24 {
+   meta:
+      description = "Detects exploits used in relation with Perfctl malware campaigns"
+      author = "Florian Roth"
+      reference = "https://www.aquasec.com/blog/perfctl-a-stealthy-malware-targeting-millions-of-linux-servers/"
+      date = "2024-10-09"
+      score = 80
+      hash1 = "22e4a57ac560ebe1eff8957906589f4dd5934ee555ebcc0f7ba613b07fad2c13"
+   strings:
+      $s1 = "Exploit failed. Target is most likely patched." ascii fullword
+      $s2 = "SHELL=pkexec" ascii fullword
+      $s3 = "/dump_" ascii fullword
+      $s4 = ".EYE$" ascii
+   condition:
+      uint16(0) == 0x457f
+      and filesize < 30000KB
+      and 2 of them
+      or all of them
+}
+
+rule MAL_LNX_Perfctl_Oct24 {
+   meta:
+      description = "Detects Perfctl malware samples"
+      author = "Florian Roth"
+      reference = "https://www.aquasec.com/blog/perfctl-a-stealthy-malware-targeting-millions-of-linux-servers/"
+      date = "2024-10-09"
+      score = 75
+      hash1 = "a6d3c6b6359ae660d855f978057aab1115b418ed277bb9047cd488f9c7850747"
+      hash2 = "ca3f246d635bfa560f6c839111be554a14735513e90b3e6784bedfe1930bdfd6"
+   strings:
+      $op1 = { 83 45 f8 01 8b 45 f8 48 3b 45 98 0f 82 1b ff ff ff 90 c9 c3 55 }
+      $op2 = { 48 8b 55 a0 48 01 ca 0f b6 0a 48 8b 55 a8 89 c0 88 4c 02 18 8b 45 fc 83 e0 3f }
+      $op3 = { 88 4c 10 58 83 45 f8 01 83 7d f8 03 0f 86 68 ff ff ff 90 c9 c3 55 }
+      $op4 = { 48 83 ec 68 48 89 7d a8 48 89 75 a0 48 89 55 98 48 8b 45 a8 48 8b 00 83 e0 3f 89 45 fc }
+   condition:
+      uint16(0) == 0x457f
+      and filesize < 300KB
+      and 2 of them
+}