MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 c81ef4d33c833956048aa2eaa74dd4c32e6ed729914b83480d43b8e11942e776. 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


Gafgyt


Vendor detections: 9


Intelligence 9 IOCs YARA 2 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: c81ef4d33c833956048aa2eaa74dd4c32e6ed729914b83480d43b8e11942e776
SHA3-384 hash: c5af26041bccfe4c608838ba93d996e2f149f3743d489191ae85bcf091e0d66a0aa6a30f2489643c9297259c99b97263
SHA1 hash: eb2094534d48799a36a266c12d2d70d2e943ed01
MD5 hash: 81c671d658bdeb96b4f8864f318bae7e
humanhash: carolina-eight-pip-texas
File name:X86_64
Download: download sample
Signature Gafgyt
Create hunting rule
File size:39'748 bytes
First seen:2026-04-21 21:44:52 UTC
Last seen:Never
File type: elf
MIME type:application/x-executable
ssdeep 768:l/y93ruaPqh9bH/DGo28hky98TG80AKZtZNyatPvHSk2PM0vKJRasv9sPD:lm3z8bH/N28C90HMGkK3FuD
TLSH T10303E0438BE6F8BCC535FA7D711F9AC0FBA09D2ED6410D3B04DB12B648A26A45734221
TrID 50.1% (.) ELF Executable and Linkable format (Linux) (4022/12)
49.8% (.O) ELF Executable and Linkable format (generic) (4000/1)
Magika unknown
Reporter abuse_ch
Tags:elf gafgyt mirai

Intelligence

File Origin
# of uploads :
1
# of downloads :
63
Origin country :
DE DE
Vendor Threat Intelligence
No detections
Detection(s):
Unix.Trojan.DarkNexus-7679166-0
Create hunting rule

Unix.Trojan.Coinminer-7668629-0
Create hunting rule

Result
Verdict:
Suspicious
Maliciousness:

Behaviour
Connection attempt
Substitutes an application name
Verdict:
Unknown
Threat level:
  2.5/10
Confidence:
100%
Link:
https://www.filescan.io/uploads/69e7f00d81aa9ec3bc1cda1d/reports/ac7007af-2535-455b-a460-7e2688dc90c2/overview
Verdict:
Malicious
File Type:
elf.64.le
First seen:
2026-04-21T07:40:00Z UTC
Last seen:
2026-04-21T19:40:00Z UTC
Hits:
~10
Link:
https://opentip.kaspersky.com/c81ef4d33c833956048aa2eaa74dd4c32e6ed729914b83480d43b8e11942e776/results?tab=lookup
Status:
terminated
Link:
https://sandbox.kunai.rocks/analysis/73f5feb4-fbe4-4197-aace-c771a8831ad5
Behavior Graph:
Download SVG
%3 guuid=f69f1989-2000-0000-c63a-f992590a0000 pid=2649 /usr/bin/sudo guuid=048fc28b-2000-0000-c63a-f992620a0000 pid=2658 /tmp/sample.bin mprotect-exec net guuid=f69f1989-2000-0000-c63a-f992590a0000 pid=2649->guuid=048fc28b-2000-0000-c63a-f992620a0000 pid=2658 execve 8b0a01dc-0728-52c1-8024-c4ba7801b8d6 8.8.8.8:53 guuid=048fc28b-2000-0000-c63a-f992620a0000 pid=2658->8b0a01dc-0728-52c1-8024-c4ba7801b8d6 con guuid=63ad008d-2000-0000-c63a-f992660a0000 pid=2662 /tmp/sample.bin guuid=048fc28b-2000-0000-c63a-f992620a0000 pid=2658->guuid=63ad008d-2000-0000-c63a-f992660a0000 pid=2662 clone guuid=09fb038d-2000-0000-c63a-f992670a0000 pid=2663 /tmp/sample.bin guuid=048fc28b-2000-0000-c63a-f992620a0000 pid=2658->guuid=09fb038d-2000-0000-c63a-f992670a0000 pid=2663 clone guuid=e92d0d8d-2000-0000-c63a-f992680a0000 pid=2664 /tmp/sample.bin net send-data zombie guuid=09fb038d-2000-0000-c63a-f992670a0000 pid=2663->guuid=e92d0d8d-2000-0000-c63a-f992680a0000 pid=2664 clone 2cad636d-97c6-5f33-9ded-e08e0e62d44b 176.65.139.115:6999 guuid=e92d0d8d-2000-0000-c63a-f992680a0000 pid=2664->2cad636d-97c6-5f33-9ded-e08e0e62d44b send: 18036B
Malware family:
Mirai
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/c70373a2-44bd-45de-b96a-abeaba4cb28c
Result
Threat name:
n/a
Detection:
malicious
Classification:
spre
Score:
68 / 100
Link:
https://www.joesandbox.com/analysis/1902320
Signature
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for submitted file
Opens /proc/net/* files useful for finding connected devices and routers
Suricata IDS alerts for network traffic
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1902320 Sample: X86_64.elf Startdate: 21/04/2026 Architecture: LINUX Score: 68 19 176.65.139.115, 57734, 6999 PALTEL-ASPALTELAutonomousSystemPS Germany 2->19 21 169.254.169.254, 80 USDOSUS Reserved 2->21 23 daisy.ubuntu.com 2->23 25 Suricata IDS alerts for network traffic 2->25 27 Malicious sample detected (through community Yara rule) 2->27 29 Multi AV Scanner detection for submitted file 2->29 8 X86_64.elf 2->8         started        11 python3.8 dpkg 2->11         started        signatures3 process4 signatures5 31 Opens /proc/net/* files useful for finding connected devices and routers 8->31 13 X86_64.elf 8->13         started        15 X86_64.elf 8->15         started        process6 process7 17 X86_64.elf 13->17         started       
Score:
100%
Verdict:
Malware
File Type:
ELF
Link:
https://malprob.io/report/c81ef4d33c833956048aa2eaa74dd4c32e6ed729914b83480d43b8e11942e776
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/c81ef4d33c833956048aa2eaa74dd4c32e6ed729914b83480d43b8e11942e776/
Threat name:
Linux.Worm.Mirai
Create hunting rule
Status:
Malicious
First seen:
2026-04-21 13:42:39 UTC
File Type:
ELF64 Little (Exe)
AV detection:
17 of 37 (45.95%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=zappjuz4qm4vmbekulvkotouymxg5vzjsffygsanio4ocgkc453a._file
Result
Malware family:
n/a
Score:
  7/10
Tags:
defense_evasion discovery linux
Link:
https://tria.ge/reports/260421-1mgg8sfx9t/
Behaviour
Reads runtime system information
Changes its process name
Reads system network configuration
Reads system routing table
Modifies Watchdog functionality
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Suspicious File
Score:
0.64
Link:
https://yomi.yoroi.company/submissions/c81ef4d33c833956048aa2eaa74dd4c32e6ed729914b83480d43b8e11942e776

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_elf64
Create hunting rule
Author:JPCERT/CC Incident Response Group
Description:UPX Anti-Unpacking technique to magic renamed for ELF64

File information

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

Web download

Gafgyt

elf c81ef4d33c833956048aa2eaa74dd4c32e6ed729914b83480d43b8e11942e776

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/3828023/
  
Delivery method
Distributed via web download

Comments