Pikabot updates

rkoumis · Mar 8, 2024 · 714636f · 714636f
1 parent 3b303a4
commit 714636f
Show file tree

Hide file tree

Showing 2 changed files with 25 additions and 9 deletions.
diff --git a/analyzer/windows/data/yara/Pikabot.yar b/analyzer/windows/data/yara/Pikabot.yar
@@ -3,13 +3,14 @@ rule Pikahook
     meta:
         author = "kevoreilly"
         description = "Pikabot anti-hook bypass"
-        cape_options = "clear,sysbp=$indsys+40,sysbpmode=1,force-sleepskip=1"
+        cape_options = "clear,sysbp=$indirect+40,sysbpmode=1,force-sleepskip=1"
         packed = "89dc50024836f9ad406504a3b7445d284e97ec5dafdd8f2741f496cac84ccda9"
     strings:
-        $indsys = {31 C0 64 8B 0D C0 00 00 00 85 C9 74 01 40 50 8D 54 24 ?? E8 [4] A3 [4] 8B 25 [4] A1 [4] FF 15}
-        $decompress = {89 54 [2] 8B 50 ?? 89 54 [2] 8B 50 ?? C7 44 [2] 00 00 10 00 89 54 [2] 8B [5] C7 04 ?? 02 01 00 00 89}
+        $indirect = {31 C0 64 8B 0D C0 00 00 00 85 C9 74 01 40 50 8D 54 24 ?? E8 [4] A3 [4] 8B 25 [4] A1 [4] FF 15}
+        $sysenter1 = {89 44 24 08 8D 85 20 FC FF FF C7 44 24 04 FF FF 1F 00 89 04 24 E8}
+        $sysenter2 = {C7 44 24 0C 00 00 00 02 C7 44 24 08 00 00 00 02 8B 45 0C 89 44 24 04 8B 45 08 89 04 24 E8}
     condition:
-        uint16(0) == 0x5A4D and all of them
+        uint16(0) == 0x5A4D and 2 of them
 }
 
 rule Pikabot
@@ -20,8 +21,22 @@ rule Pikabot
         cape_options = "clear,bp0=$decode,action0=string:eax,count=0,force-sleepskip=1,typestring=Pikabot Config"
         packed = "89dc50024836f9ad406504a3b7445d284e97ec5dafdd8f2741f496cac84ccda9"
     strings:
-        $indsys = {31 C0 64 8B 0D C0 00 00 00 85 C9 74 01 40 50 8D 54 24 ?? E8 [4] A3 [4] 8B 25 [4] A1 [4] FF 15}
-        $decode = {B9 FC FF FF FF C7 05 [8] 81 E2 [4] 89 15 [4] 8B 55 ?? 29 D1 01 4B ?? 8D 0C 10 89 4B ?? 85 F6 74 02 89 16}
+        $indirect = {31 C0 64 8B 0D C0 00 00 00 85 C9 74 01 40 50 8D 54 24 ?? E8 [4] A3 [4] 8B 25 [4] A1 [4] FF 15}
+        $decode = {29 D1 01 4B ?? 8D 0C 10 89 4B ?? 85 F6 74 02 89 16 83 C4 ?? 5B 5E [0-1] 5D C3}
+    condition:
+        uint16(0) == 0x5A4D and all of them
+}
+
+rule PikExport
+{
+    meta:
+        author = "kevoreilly"
+        description = "Pikabot export selection"
+        cape_options = "export=$export"
+        hash = "238dcc5611ed9066b63d2d0109c9b623f54f8d7b61d5f9de59694cfc60a4e646"
+    strings:
+        $export = {55 8B EC 83 EC ?? C6 45 [2] C6 45 [2] C6 45 [2] C6 45 [2] C6 45}
+        $pe = {B8 08 00 00 00 6B C8 00 8B 55 ?? 8B 45 ?? 03 44 0A 78 89 45 ?? 8B 4D ?? 8B 51 18 89 55 E8 C7 45 F8 00 00 00 00}
     condition:
         uint16(0) == 0x5A4D and all of them
 }
diff --git a/data/yara/CAPE/PikaBot.yar b/data/yara/CAPE/PikaBot.yar
@@ -22,9 +22,10 @@ rule Pikasys
         cape_type = "PikaBot Payload"
         packed = "89dc50024836f9ad406504a3b7445d284e97ec5dafdd8f2741f496cac84ccda9"
     strings:
-        $indsys = {31 C0 64 8B 0D C0 00 00 00 85 C9 74 01 40 50 8D 54 24 ?? E8 [4] A3 [4] 8B 25 [4] A1 [4] FF 15}
-        $decode = {B9 FC FF FF FF C7 05 [8] 81 E2 [4] 89 15 [4] 8B 55 ?? 29 D1 01 4B ?? 8D 0C 10 89 4B ?? 85 F6 74 02 89 16}
-        $decompress = {89 54 [2] 8B 50 ?? 89 54 [2] 8B 50 ?? C7 44 [2] 00 00 10 00 89 54 [2] 8B [5] C7 04 ?? 02 01 00 00 89}
+        $indirect = {31 C0 64 8B 0D C0 00 00 00 85 C9 74 01 40 50 8D 54 24 ?? E8 [4] A3 [4] 8B 25 [4] A1 [4] FF 15}
+        $sysenter1 = {89 44 24 08 8D 85 20 FC FF FF C7 44 24 04 FF FF 1F 00 89 04 24 E8}
+        $sysenter2 = {C7 44 24 0C 00 00 00 02 C7 44 24 08 00 00 00 02 8B 45 0C 89 44 24 04 8B 45 08 89 04 24 E8}
+        $decode = {29 D1 01 4B ?? 8D 0C 10 89 4B ?? 85 F6 74 02 89 16 83 C4 ?? 5B 5E [0-1] 5D C3}
     condition:
         uint16(0) == 0x5A4D and 2 of them
 }