Lotus Blossom Chrysalis

Date: 2026-02-02 ID: 66eb3815-e429-4bc2-a8f1-e3ea8bc7e8c2 Author: Michael Haag, Splunk Environment: attack_range Directory: lotus_blossom_chrysalis

Description

Lotus Blossom Bitdefender DLL side-loading test execution. Rundll32.exe loading malicious log.dll from user directory mimicking Bitdefender Submission Wizard abuse.

MITRE ATT&CK Techniques

ID	Technique	Tactic
T1574.002	T1574.002	Multiple

Environment Details

Field	Value
Environment	attack_range
Directory	lotus_blossom_chrysalis
Test Date	2026-02-02

Datasets

The following datasets were collected during this attack simulation:

Windows-Sysmon.log

Path: /datasets/attack_techniques/T1574.002/lotus_blossom_chrysalis/windows-sysmon.log
Sourcetype: XmlWinEventLog:Microsoft-Windows-Sysmon/Operational
Source: XmlWinEventLog:Microsoft-Windows-Sysmon/Operational

The following detections in our security content repository use this attack data for testing:

Detection Name	Type	Source	MITRE ATT&CK	Analytic Story
Windows Rundll32 Execution With Log.DLL	`Anomaly`	Endpoint	T1574	Lotus Blossom Chrysalis Backdoor

Usage Instructions

Replay with Splunk Attack Data

Replay attack data with replay.py from Splunk Attack Data.

1python replay.py --dataset /datasets/attack_techniques/T1574.002/lotus_blossom_chrysalis/windows-sysmon.log --index attack_data

Manual Import

Download the dataset files from the paths listed above
Configure your Splunk instance with the appropriate sourcetypes
Import the logs using the Splunk Add Data wizard

Find more detections and analytics for this attack technique in our security content repository.

Source: GitHub | Version: 1.0