Threat Group Cards: A Threat Actor Encyclopedia
Archived: 2026-04-05 19:41:19 UTC
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 Tool: ReZer0
Names ReZer0
Category Malware
Type Backdoor
Description
(Qihoo 360) The execution logic of ReZer0 is controlled by hard-coded built-in instructions.
According to different instructions, different malicious functions are executed. Its design logic
resembles the design method of backdoor programs.
In the 360 massive data, we found that ReZer0 has an obvious version identification. In
conjunction with the above-mentioned large number of instructions used, we speculate that the
software is still in the development stage, and it will not be ruled out that the program will be
controlled through network communication in the future.
In addition to the nature of the backdoor virus, ReZer0 also carries known remote control
Trojans such as NanoCore RAT and RemcosRAT in the resources.
Information Last change to this tool card: 21 May 2020
Download this tool card in JSON format
All groups using tool ReZer0
Changed Name Country Observed
APT groups
 Vendetta, TA2719 2020
1 group listed (1 APT, 0 other, 0 unknown)
https://apt.etda.or.th/cgi-bin/listgroups.cgi?u=866f5133-e682-40cd-bcad-dcf6e2ff10e9
Page 1 of 2

Source: https://apt.etda.or.th/cgi-bin/listgroups.cgi?u=866f5133-e682-40cd-bcad-dcf6e2ff10e9
https://apt.etda.or.th/cgi-bin/listgroups.cgi?u=866f5133-e682-40cd-bcad-dcf6e2ff10e9
Page 2 of 2

APT groups  Vendetta, TA2719 2020 
1 group listed (1 APT, 0 other, 0 unknown) 
   Page 1 of 2