Threat Actor Profile
Medium Cybercriminal
Description

NetWalker ransomware group operates by the threat actor known as "CIRCUS SPIDER". The NetWalker ransomware was discovered in 2019. The group mainly targeting the Asia Pacific region but can attack globally. The group uses common attacking tools like Mimikatz and other legitimate tools (LOLBINS) like PSTools, AnyDesk, TeamViewer, NLBrute, and more. The group knowing by targeting the healthcare sector. Finally, in January 2021, Netwalker was takedown by the authorities, the police have confiscated hundreds of thousands of dollars in ransom payments collected by the Netwalker group, and they seized servers and disrupted the infrastructure and the darknet websites of the Netwalker ransomware group.

Confidence Score
100%
Tags
ransomware ransomware.live
First Seen

Unknown

Last Updated

Unknown

Active Status
Active
Created

April 29, 2026

Indicators of Compromise

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IOC KQL for Sentinel
STIX Data
{'added_date': None,
 'client': '2003264@sit.singaporetech.edu.sg',
 'description': 'NetWalker ransomware group operates by the threat actor known '
                'as "CIRCUS SPIDER". The NetWalker ransomware was discovered '
                'in 2019. The group mainly targeting the Asia Pacific region '
                'but can attack globally. The group uses common attacking '
                'tools like Mimikatz and other legitimate tools (LOLBINS) like '
                'PSTools, AnyDesk, TeamViewer, NLBrute, and more. The group '
                'knowing by targeting the healthcare sector. Finally, in '
                'January 2021, Netwalker was takedown by the authorities, the '
                'police have confiscated hundreds of thousands of dollars in '
                'ransom payments collected by the Netwalker group, and they '
                'seized servers and disrupted the infrastructure and the '
                'darknet websites of the Netwalker ransomware group.\n',
 'firstseen': '2020-01-31T00:00:00+00:00',
 'group': 'netwalker',
 'has_negotiations': False,
 'has_ransomnote': True,
 'lastseen': '2020-12-12T00:00:00+00:00',
 'locations': [{'available': False,
                'fqdn': 'rnfdsgm6wb6j6su5txkekw4u4y47kp2eatvu7d6xhyn5cs4lt4pdrqqd.onion',
                'slug': 'http://rnfdsgm6wb6j6su5txkekw4u4y47kp2eatvu7d6xhyn5cs4lt4pdrqqd.onion',
                'title': '',
                'type': 'DLS'}],
 'negotiation_count': 0,
 'ransomnotes_count': 1,
 'tiaras_metadata': {'has_negotiations': False,
                     'has_ransomnote': True,
                     'locations': [{'available': False,
                                    'fqdn': 'rnfdsgm6wb6j6su5txkekw4u4y47kp2eatvu7d6xhyn5cs4lt4pdrqqd.onion',
                                    'slug': 'http://rnfdsgm6wb6j6su5txkekw4u4y47kp2eatvu7d6xhyn5cs4lt4pdrqqd.onion',
                                    'title': '',
                                    'type': 'DLS'}],
                     'negotiation_count': 0,
                     'ransomnotes_count': 1,
                     'ransomware_live_group': 'netwalker',
                     'tools': {'CredentialTheft': ['Mimikatz', 'ProcDump'],
                               'DefenseEvasion': [],
                               'DiscoveryEnum': ['AdFind'],
                               'Exfiltration': [],
                               'LOLBAS': ['PsExec'],
                               'Networking': [],
                               'Offsec': ['Cobalt Strike'],
                               'RMM-Tools': []},
                     'url': 'https://www.ransomware.live/group/netwalker',
                     'victims': 26,
                     'vulnerabilities': []},
 'tiaras_source': 'ransomware.live',
 'tools': {'CredentialTheft': ['Mimikatz', 'ProcDump'],
           'DefenseEvasion': [],
           'DiscoveryEnum': ['AdFind'],
           'Exfiltration': [],
           'LOLBAS': ['PsExec'],
           'Networking': [],
           'Offsec': ['Cobalt Strike'],
           'RMM-Tools': []},
 'ttps': [],
 'url': 'https://www.ransomware.live/group/netwalker',
 'victims': 26,
 'vulnerabilities': []}
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