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Threat Group Cards: A Threat Actor Encyclopedia

Tool: REPTILE

Names	REPTILE
Category	Malware
Type	Backdoor
Description	(Mandiant) To achieve persistent access on the FortiManager device, the threat actor deployed a backdoor with the filename /bin/klogd (MD5: 53a69adac914808eced2bf8155a7512d) that Mandiant refers to as REPTILE, a variant of a publicly available Linux kernel module (LKM) rootkit. With the assistance of TABLEFLIP, the threat actor was able to successfully forward traffic and access the REPTILE backdoor using iptables traffic redirection rules. Once executed, REPTILE created a packet socket to receive OSI layer 2 packets. When a packet was received, the backdoor would perform the check seen in the pseudocode in Figure 20 to determine if a magic string was present.
Information	<https://cloud.google.com/blog/topics/threat-intelligence/fortinet-malware-ecosystem/>
Malpedia	<https://malpedia.caad.fkie.fraunhofer.de/details/elf.reptile>

Last change to this tool card: 27 August 2024

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All groups using tool REPTILE

Changed	Name	Country	Observed
APT groups
	UNC3886		2021-2023

1 group listed (1 APT, 0 other, 0 unknown)

Digital Service Security Center
Electronic Transactions Development Agency

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