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Home/ATT&CK/Software/S0629
MITRE ATT&CK Malware

RainyDay (S0629)

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[RainyDay](https://attack.mitre.org/software/S0629) is a backdoor tool that has been used by [Naikon](https://attack.mitre.org/groups/G0019) since at least 2020.(Citation: Bitdefender Naikon April 2021)

Platforms: Windows

▪Techniques implemented (25)

T1036.005Match Legitimate Resource Name or LocationT1106Native APIT1070.004File DeletionT1567.002Exfiltration to Cloud StorageT1105Ingress Tool TransferT1140Deobfuscate/Decode Files or InformationT1071.001Web ProtocolsT1036.004Masquerade Task or ServiceT1007System Service DiscoveryT1057Process DiscoveryT1074.001Local Data StagingT1555.003Credentials from Web BrowsersT1027.013Encrypted/Encoded FileT1008Fallback ChannelsT1543.003Windows ServiceT1059.003Windows Command ShellT1090ProxyT1113Screen CaptureT1083File and Directory DiscoveryT1555.004Windows Credential ManagerT1053.005Scheduled TaskT1095Non-Application Layer ProtocolT1573.001Symmetric CryptographyT1574.001DLLT1005Data from Local System

▪Used by groups (1)

G0019Naikon
S0629on MITRE ATT&CK →

MITRE ATT&CK® is a registered trademark of The MITRE Corporation. © 2026 The MITRE Corporation. This work is reproduced and distributed with the permission of The MITRE Corporation.