MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 f4fd86d7902d10c5454bd1ac7e5fb5d8ef03650497e2cd8d62c6ba0427007b47. 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: 8


Intelligence 8 IOCs YARA 2 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: f4fd86d7902d10c5454bd1ac7e5fb5d8ef03650497e2cd8d62c6ba0427007b47
SHA3-384 hash: 11de537b2b7e5105356ddc60f86959d9fc506a2acbd1b4beefdba8f1483b3829e3cff9a795948c186c68ca489bc6e455
SHA1 hash: a5f8486e5d7dcd84c3692ddfa678d4555b979814
MD5 hash: 9847e4b0e6be9b91571fe16a7a84b90a
humanhash: december-enemy-red-alabama
File name:kblockd0
Download: download sample
File size:1'744'640 bytes
First seen:2026-04-13 02:53:37 UTC
Last seen:Never
File type: elf
MIME type:application/x-executable
ssdeep 49152:4yVAXv0stHELBJKe1da12mjbSIQ9mKdYvpRSSso:Z+Xv0lJaNu9mjvpRSXo
TLSH T15485331D7463D10FFA3D7B72194568AE1A70800C6BBDD07172E295CAB1726D0B3EADE8
Magika elf
Reporter abuse_ch
Tags:elf

Intelligence

File Origin
# of uploads :
1
# of downloads :
77
Origin country :
DE DE
Vendor Threat Intelligence
Malware configuration found for:
Mirai
Details
Mirai
a patched binary
Link:
https://research.acce.ciphertechsolutions.com/results/9f021124-149e-467e-a147-6dac63f08d31/
Result
Verdict:
Clean
Maliciousness:

Behaviour
Creating a file
Gathering data
Verdict:
Malicious
Uses P2P?:
false
Uses anti-vm?:
false
Architecture:
arm
Packer:
custom
Botnet:
unknown
Number of open files:
0
Number of processes launched:
0
Processes remaning?
false
Remote TCP ports scanned:
not identified
Full report:
https://elfdigest.com/brief/f4fd86d7902d10c5454bd1ac7e5fb5d8ef03650497e2cd8d62c6ba0427007b47
Behaviour
no suspicious findings
Botnet C2s
TCP botnet C2(s):
not identified
UDP botnet C2(s):
not identified
Verdict:
Malicious
File Type:
elf.32.le
First seen:
2026-04-13T00:16:00Z UTC
Last seen:
2026-04-14T15:10:00Z UTC
Hits:
~10
Link:
https://opentip.kaspersky.com/f4fd86d7902d10c5454bd1ac7e5fb5d8ef03650497e2cd8d62c6ba0427007b47/results?tab=lookup
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/339b9708-fd56-4bfb-9186-ff2c375fadce
Result
Threat name:
n/a
Detection:
malicious
Classification:
troj
Score:
48 / 100
Link:
https://www.joesandbox.com/analysis/1897116
Signature
Executes the "crontab" command typically for achieving persistence
Sample tries to persist itself using cron
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1897116 Sample: kblockd0.elf Startdate: 13/04/2026 Architecture: LINUX Score: 48 29 103.75.117.56, 37302, 443 LEASEWEB-APAC-HKG-10LeasewebAsiaPacificpteltdHK Canada 2->29 31 speed.cloudflare.com 172.66.0.218, 41128, 80 CLOUDFLARENETUS United States 2->31 9 kblockd0.elf 2->9         started        process3 process4 11 kblockd0.elf kblockd0.elf 9->11         started        process5 13 kblockd0.elf bash 11->13         started        15 kblockd0.elf crontab 11->15         started        signatures6 18 bash crontab 13->18         started        22 bash 13->22         started        39 Executes the "crontab" command typically for achieving persistence 15->39 process7 file8 27 /var/spool/cron/crontabs/tmp.Y9UlsZ, ASCII 18->27 dropped 33 Sample tries to persist itself using cron 18->33 35 Executes the "crontab" command typically for achieving persistence 18->35 24 bash crontab 22->24         started        signatures9 process10 signatures11 37 Executes the "crontab" command typically for achieving persistence 24->37
Score:
100%
Verdict:
Malware
File Type:
ELF
Link:
https://malprob.io/report/f4fd86d7902d10c5454bd1ac7e5fb5d8ef03650497e2cd8d62c6ba0427007b47
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/f4fd86d7902d10c5454bd1ac7e5fb5d8ef03650497e2cd8d62c6ba0427007b47/
Threat name:
Linux.Trojan.Generic
Create hunting rule
Status:
Suspicious
First seen:
2026-04-13 02:55:33 UTC
File Type:
ELF32 Little (Exe)
AV detection:
6 of 24 (25.00%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=6t6ynv4qfuimkrkl2gwh4x5v3dxqgzies7rm3dlcy25aijyapndq._file
Result
Malware family:
n/a
Score:
  6/10
Tags:
discovery execution persistence privilege_escalation
Link:
https://tria.ge/reports/260413-dd3yjsdt8x/
Behaviour
GoLang User-Agent
Enumerates kernel/hardware configuration
Reads runtime system information
Writes file to tmp directory
Creates/modifies Cron job
Enumerates running processes
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/f4fd86d7902d10c5454bd1ac7e5fb5d8ef03650497e2cd8d62c6ba0427007b47

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: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:upx_antiunpack_elf32
Create hunting rule
Author:JPCERT/CC Incident Response Group
Description:UPX Anti-Unpacking technique to magic renamed for ELF32

File information

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

Web download

elf f4fd86d7902d10c5454bd1ac7e5fb5d8ef03650497e2cd8d62c6ba0427007b47

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/3817461/
  
Delivery method
Distributed via web download

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