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Jeremy NIZOU
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Jeremy NIZOU
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[package] | ||
name = "hyperbro_extractor" | ||
version = "0.1.0" | ||
edition = "2021" | ||
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# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html | ||
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[dependencies] | ||
pelite = "0.9.0" | ||
utf16string = "0.2.0" | ||
memmem = "0.1.1" | ||
rust-lzxpress = "0.7.1" | ||
clap = "3.0.5" | ||
patternscan = "1.2.0" | ||
regex = "1.5.5" |
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# HyperBro Extractor | ||
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This program is based on the work done on project https://github.com/hvs-consulting/HyperBroExtractor | ||
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HyperBro is a custom in-memory RAT backdoor used by APT27 and associated groups (Emissary Panda, Iron Tiger, LuckyMouse...) | ||
Once the HyperBro virus has infected a host, it's used by APT27 to execute remote commands from it's C2 server. | ||
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## Description | ||
This tool is able to decrypt Stage 2 (thumb.dat), decompress and extract the actual hyperBro PE file (Stage 3), and parse the configuration it embeds. | ||
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HyperBroExtractor will try to automatically bruteforce the 1 byte key and decrypt Stage 2, then it will decompress the LZNT1 compressed Stage 3 and extract the configuration. | ||
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To work with as many samples as possible, this program uses patterns scanning to find configurations. | ||
In some cases the extraction of the configuration may fail but you can try to search for utf16 strings. | ||
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**NB:** We have recently noticed that some new samples have some of their configuration fields encrypted or obfuscated and this tool will not be able to extract all of the configuration. | ||
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## Credits | ||
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Thanks to HVS-Consulting, **Marko Dorfhuber** (https://github.com/PraMiD) and **Moritz Oettle** (https://github.com/moettle) for the original project https://github.com/hvs-consulting/HyperBroExtractor | ||
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- CasualX (**pelite** - https://github.com/CasualX/pelite) | ||
- Floris **Bruynooghe** (utf16string - https://github.com/flub) | ||
- jneem (**memmem** - https://github.com/jneem/memmem) | ||
- Matt Suiche (**rust-lzxpress** - https://github.com/comaeio/rust-lzxpress) | ||
- **clap** (https://github.com/clap-rs/clap) | ||
- lewisclark (**patternscan** - https://github.com/lewisclark) | ||
## Build | ||
cargo build --release | ||
## Usage | ||
### Parameters | ||
``` | ||
-i input file (Stage2 e.g: thumb.dat) | ||
-o output file (extracted PE) | ||
.\hyperbro_extractor.exe -i .\samples\thumb_dat.bin -o thumb_dat_extracted_pe.bin | ||
``` | ||
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## Example output | ||
``` | ||
/!\ --- HyperBro config extractor --- /!\ | ||
[+] ==> The decryption Key is: 0xfc | ||
/!\ --- Successfully exported PE to : thumb_dat_extracted_pe.bin --- /!\ | ||
[-] HyperBro Configuration registry key: config | ||
[-] Legit loader: vfhost.exe | ||
[-] First stage: VFTRACE.DLL | ||
[-] Second stage: thumb.dat | ||
[-] Windows service name: vfhost | ||
[-] C2 address: 80.92.206.158 | ||
[-] C2 Path: /api/v2/ajax | ||
[-] Verb: POST | ||
[-] Named Pipe: \\.\pipe\testpipe | ||
[-] Mutex: 80A85553-1E05-4323-B4F9-43A4396A4507 | ||
``` |
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