DD Binary Padding Hash Change

Contents

DD Binary Padding Hash Change¶

Metadata¶


Contributors	Roberto Rodriguez @Cyb3rWard0g
Creation Date	2020/11/10
Modification Date	2020/11/10
Tactics	TA0005
Techniques	T1027.001
Tags	None

Dataset Description¶

This dataset represents a threat actor using dd to add a zero to the binary to change the hash.

Datasets Downloads¶

Type	Link
Host	https://raw.githubusercontent.com/OTRF/Security-Datasets/master/datasets/atomic/linux/defense_evasion/host/sh_binary_padding_dd.zip

Simulation Metadata¶

Tools¶

type	Name	Module
Manual	sh	sh

Adversary View¶

md5sum /tmp/psexec.py 
5aa8b93e9b40c04d6d9d0cc8cd3975ed  /tmp/psexec.py

dd if=/dev/zero bs=1 count=1 >> /tmp/psexec.py 
1+0 records in
1+0 records out
1 byte copied, 5.6002e-05 s, 17.9 kB/s

md5sum /tmp/psexec.py 
c509e5bd899de81d603da3f61e717837  /tmp/psexec.py

Explore Datasets¶

Download & Decompress Dataset¶

import requests
from zipfile import ZipFile
from io import BytesIO

url = https://raw.githubusercontent.com/OTRF/Security-Datasets/master/datasets/atomic/linux/defense_evasion/host/sh_binary_padding_dd.zip
zipFileRequest = requests.get(url)
zipFile = ZipFile(BytesIO(zipFileRequest.content))
datasetJSONPath = zipFile.extract(zipFile.namelist()[0])

Read JSON File¶

from pandas.io import json

df = json.read_json(path_or_buf=datasetJSONPath, lines=True)

Access Security Events¶

df.head(1)

References¶

https://github.com/redcanaryco/atomic-red-team/blob/master/atomics/T1027.001/T1027.001.md#atomic-test-1—pad-binary-to-change-hash—linuxmacos-dd

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