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Updated commands to sign the dumpdecrypted.dylib #21

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79796d1
Updated procedure to sign the dylib
gameFace22 Oct 25, 2017
eeaa372
Rename README to README.md
gameFace22 Oct 25, 2017
04ecc5e
Update README.md
gameFace22 Oct 25, 2017
ed0cdc6
Update dumpdecrypted.c
gameFace22 Oct 26, 2017
9bff377
Update README.md
gameFace22 Oct 26, 2017
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18 changes: 16 additions & 2 deletions README → README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -8,14 +8,27 @@ First adjust the Makefile if you have a different iOS SDK installed.

And then just: make


Usage:

Before running the decryption dumper, the dumpdecrypted.dylib should be signed.

```
$ security find-identity -p codesigning -v
1) 998971859D4D2E74F "iPhone Developer: ..."
2) CF57726A2BA2D8B57 "Mac Developer: ..."
2 valid identities found
$ codesign -f -s 998971859D4D2E74F... dumpdecrypted.dylib
dumpdecrypted.dylib: replacing existing signature

```

```
iPod:~ root# DYLD_INSERT_LIBRARIES=dumpdecrypted.dylib /var/mobile/Applications/xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx/Scan.app/Scan
mach-o decryption dumper


DISCLAIMER: This tool is only meant for security research purposes, not for application crackers.

[+] Mach-O Decryption Dumper by Stefanesser
[+] Found encrypted data at address 00002000 of length 1826816 bytes - type 1.
[+] Opening /private/var/mobile/Applications/xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx/Scan.app/Scan for reading.
[+] Reading header
Expand All @@ -30,3 +43,4 @@ DISCLAIMER: This tool is only meant for security research purposes, not for appl
[+] Copying the not encrypted remainder of the file
[+] Closing original file
[+] Closing dump file
```
6 changes: 3 additions & 3 deletions dumpdecrypted.c
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Expand Up @@ -4,10 +4,11 @@ Dumps decrypted iPhone Applications to a file - better solution than those GDB s
(C) Copyright 2011-2014 Stefan Esser

iPod:~ root# DYLD_INSERT_LIBRARIES=dumpdecrypted.dylib /var/mobile/Applications/xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx/Scan.app/Scan
mach-o decryption dumper


DISCLAIMER: This tool is only meant for security research purposes, not for application crackers.

[+] Mach-O Decryption Dumper by Stefanesser
[+] Found encrypted data at address 00002000 of length 1826816 bytes - type 1.
[+] Opening /private/var/mobile/Applications/xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx/Scan.app/Scan for reading.
[+] Reading header
Expand Down Expand Up @@ -55,10 +56,9 @@ void dumptofile(int argc, const char **argv, const char **envp, const char **app
unsigned int fileoffs = 0, off_cryptid = 0, restsize;
int i,fd,outfd,r,n,toread;
char *tmp;

printf("mach-o decryption dumper\n\n");

printf("DISCLAIMER: This tool is only meant for security research purposes, not for application crackers.\n\n");
printf("[+] Mach-O Decryption Dumper by Stefanesser \n");

/* detect if this is a arm64 binary */
if (pvars->mh->magic == MH_MAGIC_64) {
Expand Down