Merge pull request #307 from X-Junior/Peach-Sandstorm-APT

feat: new rules related to Peach Sandstorm APT

yara/apt_peach_sandstorm.yar

@@ -0,0 +1,30 @@
+rule APT_MAL_FalseFont_Backdoor_Jan24 {
+   meta:
+      description = "Detects FalseFont backdoor, related to Peach Sandstorm APT"
+      author = "X__Junior, Jonathan Peters"
+      date = "2024-01-11"
+      reference = "https://twitter.com/MsftSecIntel/status/1737895710169628824"
+      hash = "364275326bbfc4a3b89233dabdaf3230a3d149ab774678342a40644ad9f8d614"
+      score = 80
+   strings:
+      $x1 = "Agent.Core.WPF.App" ascii
+      $x2 = "3EzuNZ0RN3h3oV7rzILktSHSaHk+5rtcWOr0mlA1CUA=" wide //AesIV
+      $x3 = "viOIZ9cX59qDDjMHYsz1Yw==" wide // AesKey
+
+      $sa1 = "StopSendScreen" wide
+      $sa2 = "Decryption failed :(" wide
+
+      $sb1 = "{0}     {1}     {2}     {3}" wide
+      $sb2 = "\\BraveSoftware\\Brave-Browser\\User Data\\" wide
+      $sb3 = "select * from logins" wide
+      $sb4 = "Loginvault.db" wide
+      $sb5 = "password_value" wide
+   condition:
+      uint16(0) == 0x5a4d
+      and (
+         1 of ($x*)
+         or all of ($sa*)
+         or all of ($sb*)
+         or ( 1 of ($sa*) and 4 of ($sb*) )
+      )
+}