Sigma rule: LiteLLM / TeamPCP Supply Chain Attack Indicators

Rule

Title

LiteLLM / TeamPCP Supply Chain Attack Indicators

Status

experimental

Level

high

Author

Swachchhanda Shrawan Poudel (Nextron Systems)

Date

2026-03-30

File

rules-emerging-threats/2026/TA/TeamPCP/proc_creation_lnx_teampcp_litellm_supply_chain_attack_indicators.yml

Commit

ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects process executions related to the backdoored versions of LiteLLM (v1.82.7 or v1.82.8).
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.

Log source

product

linux

category

process_creation

Detection

selection_pth_package:
    # Execution of .pth file
    Image|contains: '/python3'
    CommandLine|contains|all:
        - "exec(base64.b64decode('aW1wb3J0"
        - "kI2NF9TQ1JJUFQgPSAiYV"
selection_tar:
    Image|endswith: '/tar'
    CommandLine|contains|all:
        - 'tpcp.tar.gz'
        - 'payload.enc'
        - 'session.key.enc'
selection_curl:
    Image|endswith: '/curl'
    CommandLine|contains|all:
        - 'models.litellm.cloud'
        - 'X-Filename: tpcp.tar.gz'
selection_sysmon_service:
    ParentImage|contains: '/python3'
    CommandLine|contains|all:
        - 'systemctl'
        - '--user'
        - 'sysmon'
condition: 1 of selection_*

False positives (as the rule lists them)

• Unknown

Tags

• attack.initial-access
• attack.t1195.002
• attack.collection
• attack.t1560.001
• attack.persistence
• attack.privilege-escalation
• attack.t1543.002
• detection.emerging-threats

MITRE ATT&CK ids this rule names

• T1195.002
• T1543.002
• T1560.001

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

Read on 2026-11-03T00:58:21.399Z under licence sigma-drl-1.1@d5f4c36a from https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules-emerging-threats/2026/TA/TeamPCP/proc_creation_lnx_teampcp_litellm_supply_chain_attack_indicators.yml