MAL_WIPER_BiBi_Oct23

rule MAL_WIPER_BiBi_Oct23 {
   meta:
      description = "Detects BiBi wiper samples for Windows and Linux"
      author = "Florian Roth"
      reference = "https://x.com/ESETresearch/status/1719437301900595444?s=20"
      date = "2023-11-01"
      hash1 = "23bae09b5699c2d5c4cb1b8aa908a3af898b00f88f06e021edcb16d7d558efad"
      hash2 = "40417e937cd244b2f928150cae6fa0eff5551fdb401ea072f6ecdda67a747e17"
      id = "e1ea8016-e074-5208-8c98-54922bbcc407"
   strings:
      $s1 = "send attempt while closed" ascii fullword
      $s2 = "[+] CPU cores: %d, Threads: %d" ascii fullword
      $s3 = "[+] Stats: %d | %d" ascii fullword

      $opw1 = { 33 c0 88 45 48 b8 01 00 00 00 86 45 48 45 8b f5 48 8d 3d de f5 ff ff 0f 57 c9 f3 0f 7f 4d b8 }
      $opw2 = { 2d ce b5 00 00 c5 fa e6 f5 e9 40 fe ff ff 0f 1f 44 00 00 75 2e c5 fb 10 0d 26 b4 00 00 44 8b 05 5f b6 00 00 e8 ca 0d 00 00 }

      $opl1 = { 4c 8d 44 24 08 48 89 f7 48 ff c2 48 83 c6 04 e8 c7 fb ff ff 41 89 c1 0f b6 42 ff 41 0f af c1 }
      $opl2 = { e8 6f fb ff ff 49 8d 78 f8 89 c0 48 01 c2 48 89 15 09 fb 24 00 e8 5a fb ff ff 49 8d 78 fc 6b f0 06 } 
   condition:
      ( uint16(0) == 0x5a4d or uint16(0) == 0x457f )
      and filesize < 4000KB
      and 2 of them
}