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MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 4435fcd6862921092614dbeaa880e4192352984686ebcd98f0ba13ee8e226ef9. While MalwareBazaar tries to identify whether the sample provided is malicious or not, there is no guarantee that a sample in MalwareBazaar is malicious.

Database Entry


Rekoobe


Vendor detections: 11


Intelligence 11 IOCs YARA 7 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 4435fcd6862921092614dbeaa880e4192352984686ebcd98f0ba13ee8e226ef9
SHA3-384 hash: ac71304ac6e74ecd7128f44b7be353a9ca0989fcc9566156531da46f3cf8531acbce0fa8186e6e4b004024fd42fbbe09
SHA1 hash: c8849ed0c802545372ffa1f463dac4e7b9e53e7c
MD5 hash: b31ab64501401e65d64f8bb8b4de0700
humanhash: tennis-summer-nebraska-mirror
File name:snip_22539
Download: download sample
Signature Rekoobe
Create hunting rule
File size:59'616 bytes
First seen:2026-10-03 19:26:12 UTC
Last seen:Never
File type: elf
MIME type:application/x-sharedlib
ssdeep 1536:/0hBpPU6+Z6yyFQez0kVyqexuM8AN/10Xm:/qPU6+Z6yyFQez0bqex2AN/10
TLSH T170438C0BA6118DB9CCD4A6318F6FBA21A1A3B544FF7CA12F35045793292B171253AB36
telfhash t110d0a786ee766a6566c35279dcf9416a4202a91740570b64dd548ac5983b808801996e
TrID 50.1% (.) ELF Executable and Linkable format (Linux) (4022/12)
49.8% (.O) ELF Executable and Linkable format (generic) (4000/1)
Magika elf
Reporter smica83
Tags:bpfdoor DataPlane elf Rekoobe

Intelligence

File Origin
# of uploads :
1
# of downloads :
123
Origin country :
HU HU
Vendor Threat Intelligence
No detections
Detection(s):
Unix.Trojan.Rekoobe-10028475-0
Create hunting rule

YARA.SIGNATURE_BASE_EXT_HKTL_MAL_Tinyshell_Backdoor.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Runs as daemon
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
gcc rekoobe
Link:
https://www.filescan.io/uploads/6ac156e061d4fb187837f7c5/reports/bebe655f-dd9e-4124-8d56-6d40acd7801c/overview
Verdict:
Malicious
Uses P2P?:
false
Uses anti-vm?:
false
Architecture:
x86
Packer:
not packed
Botnet:
unknown
Number of open files:
8
Number of processes launched:
2
Processes remaning?
true
Remote TCP ports scanned:
not identified
Full report:
https://elfdigest.com/brief/4435fcd6862921092614dbeaa880e4192352984686ebcd98f0ba13ee8e226ef9
Behaviour
Process Renaming
Botnet C2s
TCP botnet C2(s):
not identified
UDP botnet C2(s):
not identified
Verdict:
Malicious
File Type:
elf.64.le
First seen:
2026-10-04T19:07:00Z UTC
Last seen:
2026-10-04T19:13:00Z UTC
Hits:
~10
Link:
https://opentip.kaspersky.com/4435fcd6862921092614dbeaa880e4192352984686ebcd98f0ba13ee8e226ef9/results?tab=lookup
Status:
terminated
Link:
https://sandbox.kunai.rocks/analysis/04c13cbd-d4ff-48cd-84f6-62278cf6368d
Behavior Graph:
Download SVG
%3 guuid=43d9c89b-1600-0000-06ff-29214a0f0000 pid=3914 /usr/bin/sudo guuid=17bc3ca0-1600-0000-06ff-2921570f0000 pid=3927 /tmp/sample.bin guuid=43d9c89b-1600-0000-06ff-29214a0f0000 pid=3914->guuid=17bc3ca0-1600-0000-06ff-2921570f0000 pid=3927 execve guuid=c4a49aa0-1600-0000-06ff-29215a0f0000 pid=3930 /tmp/sample.bin bpf-socket-filter guuid=17bc3ca0-1600-0000-06ff-2921570f0000 pid=3927->guuid=c4a49aa0-1600-0000-06ff-29215a0f0000 pid=3930 clone
Malware family:
Rekoobe
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/e461835c-0b04-41d6-938b-4d509e22a37b
Result
Threat name:
n/a
Detection:
malicious
Classification:
n/a
Score:
64 / 100
Link:
https://www.joesandbox.com/analysis/1981767
Signature
Antivirus / Scanner detection for submitted sample
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for submitted file
Behaviour
Behavior Graph:
Download SVG
Score:
93%
Verdict:
Malware
File Type:
ELF
Link:
https://malprob.io/report/4435fcd6862921092614dbeaa880e4192352984686ebcd98f0ba13ee8e226ef9
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/4435fcd6862921092614dbeaa880e4192352984686ebcd98f0ba13ee8e226ef9/
Threat name:
Linux.Backdoor.Rekobee
Create hunting rule
Status:
Malicious
First seen:
2026-06-12 12:57:51 UTC
File Type:
ELF64 Little (SO)
AV detection:
19 of 38 (50.00%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=iq27zvugfeqqsjqu3pvkrahedervfgcgq3v43ghqxij65drcn34q._file
Result
Malware family:
n/a
Score:
  7/10
Tags:
discovery linux
Link:
https://tria.ge/reports/261003-x5mkesww8m/
Behaviour
System Network Configuration Discovery
Creates Raw socket
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/4435fcd6862921092614dbeaa880e4192352984686ebcd98f0ba13ee8e226ef9

YARA Signatures

MalwareBazaar uses YARA rules from several public and non-public repositories, such as YARAhub and Malpedia. Those are being matched against malware samples uploaded to MalwareBazaar as well as against any suspicious process dumps they may create. Please note that only results from TLP:CLEAR rules are being displayed.

Rule name:enterpriseapps2
Create hunting rule
Author:Tim Brown @timb_machine
Description:Enterprise apps
Rule name:EXT_HKTL_MAL_TinyShell_Backdoor
Create hunting rule
Author:Mandiant
Description:Detects Tiny Shell - an open-source UNIX backdoor
Reference:https://www.mandiant.com/resources/blog/unc2891-overview
Rule name:Linux_Generic_Threat_1e047045
Create hunting rule
Author:Elastic Security
Rule name:Linux_Generic_Threat_80aea077
Create hunting rule
Author:Elastic Security
Rule name:Linux_Trojan_Rekoobe_b41f70c2
Create hunting rule
Author:Elastic Security
Rule name:setsockopt
Create hunting rule
Author:Tim Brown @timb_machine
Description:Hunts for setsockopt() red flags
Rule name:unixredflags3
Create hunting rule
Author:Tim Brown @timb_machine
Description:Hunts for UNIX red flags

File information

The table below shows additional information about this malware sample such as delivery method and external references.

  
Link
https://www.rapid7.com/blog/post/tr-smtp-is-the-key-bpfdoor-averat-hitting-the-network-edge/

Comments