MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b638d4d5fccbc89bc3aae0a8593c71a4bf61e5b2842d4de7e0f729739b3c416c. 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


Threat unknown


Vendor detections: 4


Intelligence 4 IOCs YARA 4 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: b638d4d5fccbc89bc3aae0a8593c71a4bf61e5b2842d4de7e0f729739b3c416c
SHA3-384 hash: b75c7c411c318efc0c3814a14eddf2ca00a6ddbf22cf675e01611366c158c1620bef446620524d2203be5f924c292216
SHA1 hash: 68bbca93d97145cdaa49df88fa090509a24bbea8
MD5 hash: dfacd470205cc0e996bbfef7728c18ac
humanhash: venus-monkey-mike-sink
File name:kworkerd-netns-rt
Download: download sample
File size:138'436 bytes
First seen:2026-06-10 10:06:08 UTC
Last seen:Never
File type: elf
MIME type:application/x-executable
ssdeep 3072:SofwvRrcyfvP88FbZ4Oc82heqcPcP+20GvOq/dfz4bQAIUpo:2vRrHfH88FCOcnMqcED9T/hgQDUu
TLSH T15BD312196B224F9EF4264C3C52F3AC110B4C7D5EA983A2649A4CECC81FB46CF555C7B8
telfhash t147d01230083813b02188cc1e05ccfa0c68a064ebaaa61c2fc94898e08222e86ac02c28
Magika elf
Reporter BlinkzSec

Intelligence

File Origin
# of uploads :
1
# of downloads :
64
Origin country :
GB GB
Vendor Threat Intelligence
No detections
Result
Verdict:
Suspicious
Maliciousness:

Behaviour
Deleting a recently created file
Creating a process from a recently created file
Creating a file in the %temp% directory
Status:
terminated
Link:
https://sandbox.kunai.rocks/analysis/b16e8899-d8aa-4f8f-a82b-cef972a80df5
Behavior Graph:
Download SVG
%3 guuid=d72a777c-1e00-0000-0b0c-e4c17d0c0000 pid=3197 /usr/bin/sudo guuid=80d3477f-1e00-0000-0b0c-e4c1830c0000 pid=3203 /tmp/sample.bin guuid=d72a777c-1e00-0000-0b0c-e4c17d0c0000 pid=3197->guuid=80d3477f-1e00-0000-0b0c-e4c1830c0000 pid=3203 execve
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/e15856b2-67da-4faa-8d52-09bbdfe0acf4
Score:
100%
Verdict:
Malware
File Type:
ELF
Link:
https://malprob.io/report/b638d4d5fccbc89bc3aae0a8593c71a4bf61e5b2842d4de7e0f729739b3c416c
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/b638d4d5fccbc89bc3aae0a8593c71a4bf61e5b2842d4de7e0f729739b3c416c/
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=wy4njvp4zpejxq5k4cufspdrus7wdznsqqwu3z7a64uxhgz4ifwa._file
Result
Malware family:
n/a
Score:
  7/10
Tags:
discovery upx
Link:
https://tria.ge/reports/260610-l5rzcsgx51/
Behaviour
Reads runtime system information
Writes file to tmp directory
UPX packed file
Executes dropped EXE
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Legit
Score:
0.00
Link:
https://yomi.yoroi.company/submissions/b638d4d5fccbc89bc3aae0a8593c71a4bf61e5b2842d4de7e0f729739b3c416c

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:linux_generic_ipv6_catcher
Create hunting rule
Author:@_lubiedo
Description:ELF samples using IPv6 addresses
Rule name:TH_Generic_MassHunt_Linux_Malware_2026_CYFARE
Create hunting rule
Author:CYFARE
Description:Generic Linux malware mass-hunt rule - 2026
Reference:https://cyfare.net/
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.

Web download

elf b638d4d5fccbc89bc3aae0a8593c71a4bf61e5b2842d4de7e0f729739b3c416c

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/3862335/
  
Delivery method
Distributed via web download

Comments