Firmware Analysis - ZLIB file conversion to Bitmap

[psgama]

Hi guys,

I've been picking away at the firmware for a common security system trying to see if the bitmaps can be modified and I'm a bit stuck.

The files within the firmware are compressed using ZLIB, but after decompression, they don't resemble a bitmap file even though the firmware indicates that's what they are.

Paste the below into a HEX editor and you'll see what I mean.

Can anyone point me in the right direction on how to convert this back into a bitmap? The file below should be called: icon_ui_barrier_button_up_Bitmap

Compressed ZLIB HEX. Zlib Magic number is 789C

69 63 6F 6E 5F 75 69 5F 62 61 72 72 69 65 72 5F 62 75 74 74 6F 6E 5F 75 70 5F 42 69 74 6D 61 70 00 00 00 00 00 00 00 00 00 00 00 00 1A 05 00 00 78 9C 95 93 3F 68 53 51 18 C5 5F 4D 6B 12 1B CA B3 D5 6A 8C 7F 1A 6A AD B4 56 F1 4F 15 11 5B 74 51 D4 8A E2 E0 60 07 AD 83 88 9B 83 0A 5D A2 74 72 70 70 F0 CF E0 C3 51 44 1C 82 83 E0 64 9D DA A1 5B 5B 44 B0 16 85 0E A5 9B FA 48 3B 1C CF 77 BF 2F 1F 64 34 70 2E 37 E7 FC EE 7D E7 DD DC 3C 8C 1F 44 DD 91 7E 2E 51 C7 C3 2C 53 59 C0 C9 28 49 4F 05 C9 5C FD 63 61 CC 32 1D A6 FB 08 0B 48 91 A4 30 C9 5C BC 61 E3 8E F8 5E 19 D2 05 EA 0B 89 1F 68 89 84 CF 54 64 2E 9E 66 19 E3 0F 85 71 1D 57 E5 E9 9E A1 AA 68 0D 2B C4 AB 42 BD BC 71 07 9D 1E 25 F3 9C 29 D0 16 E8 A6 8A 7E 1F 35 66 BF B7 C9 71 FD 51 6A 8A 6D 56 B0 D1 DB AC 40 3C CD 72 C6 EF F3 FD 8B 74 2F 50 F3 D8 E2 6D E6 A1 5E D1 B8 FE 30 36 31 19 27 53 45 C9 9B 48 EF 71 CB F7 7A 93 98 6B AF 53 33 6C 52 C3 0E 6F 52 83 78 9A C5 C6 EF F1 26 7D 74 2F 53 35 74 7B 13 59 21 5E 9F 71 BB 1B 4E F1 29 D3 69 F4 3A 3D 0D F5 F2 C6 95 BD 51 33 E9 4E EA 31 1B CD A1 DF 1B CD 41 3C CD 9A 8D EF F2 67 0C D1 BD 1B C9 D9 1F F0 67 00 EA 0D 19 B7 CB CE 26 49 CF D1 5D C4 61 27 17 49 BE A0 7A A3 9D 81 D9 6E 6D 92 34 26 53 A6 BE B2 CD 32 7F 97 7A 9B 9F A4 3F 50 25 EE B4 21 2A 05 7E 9B B5 49 D2 02 39 B9 0D 9F 70 A2 A1 CD 33 EA 8A 71 45 6F 73 87 CC 5B DE D9 3A F9 97 D4 AB 70 CB B6 06 A6 D3 DB 14 C9 9C A7 BE B3 CD 6F 9C 6E B8 37 E2 95 D9 A6 3D DA 1C F8 4D DE A6 8B DC 18 F5 0D 67 FD 19 1F B9 62 2C DC E2 8E C0 75 78 9B 27 DC E7 33 EF 54 FD DE BC 23 79 3B 6A 0F 79 EC 4D 7A 98 DF A3 7E 91 5E C3 45 DB 37 49 FF 40 FD 1E 63 DB BC C5 20 DD 5B D4 2A 4F A0 4E AF 42 BD 41 E3 0A 4E CB FF ED 0D D3 59 5C 75 7A 16 EA B5 1A 97 F7 36 59 32 72 53 5E 87 5F E9 9A 9F CB 32 D4 93 2C 6B 7C CE DF 74 84 EE 04 6E F8 9B 4E 40 3C CD D7 7B 93 01 E6 EF 99 2C E1 A6 37 59 82 7A 03 C6 B5 F8 9E 2F E9 4E 42 DE 69 26 EC 39 09 F1 34 BF FF 9F E3 3F B7 0C 49 ED FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 55 CC 77 33 9A 01 00 00 97 6B 00 80 01 00 3C 21

Decompressed

69 63 6F 6E 5F 75 69 5F 62 61 72 72 69 65 72 5F 62 75 74 74 6F 6E 5F 75 70 5F 42 69 74 6D 61 70 00 00 00 00 00 00 00 00 00 00 00 00 1A 05 00 00 81 10 78 00 23 00 00 00 00 00 00 00 50 00 00 00 39 00 00 00 00 00 03 80 DF FF 3D 00 9E F7 41 00 9E F7 41 00 DF FF 3D 00 39 00 00 00 00 00 37 00 00 00 00 00 07 80 DF FF 3F 00 DF FF 82 FF DF FF F7 FF 9E F7 FF FF 9E F7 FF FF 9E F7 F7 FF 9E F7 82 FF DF FF 3F 00 37 00 00 00 00 00 34 00 00 00 00 00 03 80 DF FF 03 00 DF FF 0C 00 DF FF C3 FF 9E F7 E0 FF 05 00 9E F7 FF FF 03 80 9E F7 E0 FF DF FF C3 FF DF FF 0C 00 DF FF 03 00 34 00 00 00 00 00 32 00 00 00 00 00 02 80 DF FF 09 00 DF FF 47 00 DF FF B2 FF 0B 00 9E F7 FF FF 02 80 DF FF B2 FF DF FF 47 00 DF FF 09 00 32 00 00 00 00 00 31 00 00 00 00 00 02 80 DF FF 5C 00 9E F7 97 FF DF FF FF FF 0E 00 9E F7 FF FF 01 80 9E F7 97 FF DF FF 5C 00 31 00 00 00 00 00 2E 00 00 00 00 00 03 80 DF FF 08 00 DF FF 36 00 DF FF C9 FF 9E F7 ED FF 11 00 9E F7 FF FF 03 80 9E F7 ED FF DF FF C9 FF DF FF 36 00 DF FF 08 00 2E 00 00 00 00 00 2C 00 00 00 00 00 02 80 DF FF 19 00 DF FF 4C 00 DF FF D7 FF 17 00 9E F7 FF FF 02 80 DF FF D7 FF DF FF 4C 00 DF FF 19 00 2C 00 00 00 00 00 2B 00 00 00 00 00 01 80 DF FF 7B 00 9E F7 B2 FF 1B 00 9E F7 FF FF 01 80 9E F7 B2 FF DF FF 7B 00 2B 00 00 00 00 00 28 00 00 00 00 00 03 80 DF FF 10 00 DF FF 60 00 DF FF CE FF 9E F7 F9 FF 1D 00 9E F7 FF FF 03 80 9E F7 F9 FF DF FF CE FF DF FF 60 00 DF FF 10 00 28 00 00 00 00 00 26 00 00 00 00 00 02 80 DF FF 2A 00 DF FF 51 00 DF FF F9 FF 23 00 9E F7 FF FF 02 80 DF FF F9 FF DF FF 51 00 DF FF 2A 00 26 00 00 00 00 00 24 00 00 00 00 00 02 80 DF FF 09 00 DF FF 92 FF DF FF CA FF 27 00 9E F7 FF FF 02 80 DF FF CA FF DF FF 92 FF DF FF 09 00 24 00 00 00 00 00 21 00 00 00 00 00 03 80 DF FF 04 00 DF FF 16 00 DF FF 8A FF 9E F7 D6 FF 2B 00 9E F7 FF FF 03 80 9E F7 D6 FF DF FF 8A FF DF FF 16 00 DF FF 04 00 21 00 00 00 00 00 20 00 00 00 00 00 02 80 DF FF 3E 00 DF FF 72 00 DF FF FF FF 2F 00 9E F7 FF FF 02 80 DF FF FF FF DF FF 72 00 DF FF 3E 00 20 00 00 00 00 00 1F 00 00 00 00 00 01 80 9E F7 4A 00 DF FF E1 FF 33 00 9E F7 FF FF 02 80 DF FF E1 FF DF FF 98 FF DF FF 27 00 1E 00 00 00 00 00 1C 00 00 00 00 00 03 80 9E F7 10 00 9E F7 21 00 9E F7 D9 FF 9E F7 EB FF 36 00 9E F7 FF FF 03 80 9E F7 E3 FF DF FF B4 FF DF FF 1B 00 DF FF 0A 00 1B 00 00 00 00 00 1A 00 00 00 00 00 02 80 9E F7 0C 00 9E F7 5C 00 9E F7 BB FF 3B 00 9E F7 FF FF 02 80 DF FF FF FF DF FF 96 FF DF FF 53 00 1A 00 00 00 00 00 19 00 00 00 00 00 01 80 9E F7 6B 00 9E F7 AA FF 3F 00 9E F7 FF FF 02 80 DF FF F6 FF DF FF 9D FF DF FF 47 00 18 00 00 00 00 00 16 00 00 00 00 00 03 80 9E F7 19 00 9E F7 4B 00 9E F7 DE FF 9E F7 F4 FF 42 00 9E F7 FF FF 03 80 9E F7 ED FF DF FF DE FF 9E F7 21 00 DF FF 12 00 15 00 00 00 00 00 14 00 00 00 00 00 02 80 9E F7 20 00 9E F7 62 00 9E F7 DB FF 48 00 9E F7 FF FF 02 80 DF FF B8 FF DF FF 62 00 DF FF 09 00 13 00 00 00 00 00 13 00 00 00 00 00 01 80 9E F7 8E FF 9E F7 C1 FF 4C 00 9E F7 FF FF 01 80 9E F7 AC FF DF FF 69 00 12 00 00 00 00 00 10 00 00 00 00 00 03 80 9E F7 25 00 9E F7 76 00 9E F7 E4 FF 9E F7 FB FF 4E 00 9E F7 FF FF 02 80 9E F7 F5 FF 9E F7 76 00 9E F7 25 00 10 00 00 00 00 00 0E 00 00 00 00 00 02 80 9E F7 35 00 9E F7 67 00 9E F7 FA FF 53 00 9E F7 FF FF 02 80 9E F7 FA FF 9E F7 67 00 9E F7 35 00 0E 00 00 00 00 00 0C 00 00 00 00 00 02 80 9E F7 0B 00 9E F7 A8 FF 9E F7 D5 FF 57 00 9E F7 FF FF 02 80 9E F7 D5 FF 9E F7 A8 FF 9E F7 0B 00 0C 00 00 00 00 00 09 00 00 00 00 00 03 80 9E F7 07 00 9E F7 2B 00 9E F7 A0 FF 9E F7 EB FF 5B 00 9E F7 FF FF 03 80 9E F7 EB FF 9E F7 A0 FF 9E F7 2B 00 9E F7 07 00 09 00 00 00 00 00 08 00 00 00 00 00 01 80 9E F7 4D 00 9E F7 84 FF 61 00 9E F7 FF FF 01 80 9E F7 84 FF 9E F7 4D 00 08 00 00 00 00 00 06 00 00 00 00 00 02 80 9E F7 2D 00 9E F7 AE FF 9E F7 E7 FF 63 00 9E F7 FF FF 02 80 9E F7 E7 FF 9E F7 AE FF 9E F7 2D 00 06 00 00 00 00 00 05 00 00 00 00 00 01 80 9E F7 99 FF 9E F7 C2 FF 67 00 9E F7 CE FF 01 80 9E F7 C2 FF 9E F7 99 FF 05 00 00 00 00 00 77 00 00 00 00 00 77 00 00 00 00 00 77 00 00 00 00 00 77 00 00 00 00 00 77 00 00 00 00 00 77 00 00 00 00 00 77 00 00 00 00 00 77 00 00 00 00 00