MAL_IceId_Core_202104

rule MAL_IceId_Core_202104 {
   meta:
      author = "Thomas Barabosch, Telekom Security"
      date = "2021-04-12"
      description = "2021 Bokbot / Icedid core"
      reference = "https://www.telekom.com/en/blog/group/article/let-s-set-ice-on-fire-hunting-and-detecting-icedid-infections-627240"
      id = "526a73da-415f-58fe-bb5f-4c3df6b2e647"
   strings:
      $internal_name = "fixed_loader64.dll" fullword

      $string0 = "mail_vault" wide fullword
      $string1 = "ie_reg" wide fullword
      $string2 = "outlook" wide fullword
      $string3 = "user_num" wide fullword
      $string4 = "cred" wide fullword
      $string5 = "Authorization: Basic" fullword
      $string6 = "VaultOpenVault" fullword
      $string7 = "sqlite3_free" fullword
      $string8 = "cookie.tar" fullword
      $string9 = "DllRegisterServer" fullword
      $string10 = "PT0S" wide
   condition:
      uint16(0) == 0x5a4d and
      filesize < 5000KB and 
      ( $internal_name or all of ($s*) )
      or all of them
}