Sigma rule: Elise Backdoor Activity

Rule

Title

Elise Backdoor Activity

Status

test

Level

critical

Author

Florian Roth (Nextron Systems), Nasreddine Bencherchali (Nextron Systems)

Date

2018-01-31

Modified

2023-03-09

File

rules-emerging-threats/2018/Malware/Elise-Backdoor/proc_creation_win_malware_elise.yml

Commit

ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects Elise backdoor activity used by APT32

Log source

product

windows

category

process_creation

Detection

selection_other_svchost:
    Image|endswith: '\Microsoft\Network\svchost.exe'
selection_other_del:
    CommandLine|contains|all:
        - '\Windows\Caches\NavShExt.dll'
        - '/c del'
selection_dll_path:
    CommandLine|endswith:
        - '\AppData\Roaming\MICROS~1\Windows\Caches\NavShExt.dll'
        - '\AppData\Roaming\Microsoft\Windows\Caches\NavShExt.dll'
selection_dll_function:
    CommandLine|contains: ',Setting'
condition: 1 of selection_other_* or all of selection_dll_*

False positives (as the rule lists them)

• Unlikely

Tags

• attack.g0030
• attack.g0050
• attack.s0081
• attack.execution
• attack.t1059.003
• detection.emerging-threats

MITRE ATT&CK ids this rule names

• G0030
• G0050
• S0081
• T1059.003

References

• https://community.rsa.com/community/products/netwitness/blog/2018/02/13/lotus-blossom-continues-asean-targeting
• https://web.archive.org/web/20200302083912/https://www.accenture.com/t20180127T003755Z_w_/us-en/_acnmedia/PDF-46/Accenture-Security-Dragonfish-Threat-Analysis.pdf

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/2018/Malware/Elise-Backdoor/proc_creation_win_malware_elise.yml