TeamPCP LiteLLM Supply Chain Attack Persistence Indicators

SIGMA detection rule by Swachchhanda Shrawan Poudel (Nextron Systems) · NOASSERTION

Detects the creation of specific persistence files as observed in the LiteLLM PyPI supply chain attack. In March 2026, a supply chain attack was discovered involving the popular open-source LLM framework LiteLLM by Threat Actor TeamPCP. The malicious package harvests every credential on the system, encrypts and exfiltrates them, and installs a persistent C2 backdoor.

title: TeamPCP LiteLLM Supply Chain Attack Persistence Indicators
id: 81c0b7f5-81c9-435e-a291-bc32fc2b72cd
status: experimental
description: |
    Detects the creation of specific persistence files as observed in the LiteLLM PyPI supply chain attack.
    In March 2026, a supply chain attack was discovered involving the popular open-source LLM framework LiteLLM by Threat Actor TeamPCP.
    The malicious package harvests every credential on the system, encrypts and exfiltrates them, and installs a persistent C2 backdoor.
references:
    - https://novasky.io/hunts/hunting-litellm-supply-chain
    - https://www.virustotal.com/gui/file/71e35aef03099cd1f2d6446734273025a163597de93912df321ef118bf135238/
    - https://huskyhacks.io/posts/litellm-cred-stealer/
    - https://www.wiz.io/blog/threes-a-crowd-teampcp-trojanizes-litellm-in-continuation-of-campaign
author: Swachchhanda Shrawan Poudel (Nextron Systems)
date: 2026-03-30
tags:
    - attack.persistence
    - attack.privilege-escalation
    - attack.t1543.002
    - attack.initial-access
    - attack.t1195.002
    - detection.emerging-threats
logsource:
    category: file_event
    product: linux
detection:
    selection:
        Image|contains: '/python3'
        TargetFilename|endswith:
            - '/.config/sysmon/sysmon.py'
            - '/.config/systemd/user/sysmon.service'
    condition: selection
falsepositives:
    - Unknown
level: high

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4b53f4b7-690f-418b-879a-8a98ab58ad15

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