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120.55.99.107 has a very high threat confidence level of 99%, originating from Hangzhou, China, on the Hangzhou Alibaba Advertising Co.,Ltd. network (37963). It has been observed across 229 sessions targeting FTP, with detected attack patterns including ftp valid account photo scr deployment, First observed on March 1, 2026, most recently active March 5, 2026.
Detects an automated FTP session performing credential probing, directory discovery, ASCII mode configuration, passive transfer negotiation, and staged upload of a photo_scr payload. This pattern is consistent with scripted web shell or content-stager deployment via compromised FTP credentials.
FTP session where the client uploads files named Photo.scr and Photo.lnk using STOR after entering passive mode.