MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 e9ce4a059cbb619aa07380aec63ea8b06bd2fd256f6b6f0a09b9135d7072d227. 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: 6


Intelligence 6 IOCs YARA 4 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: e9ce4a059cbb619aa07380aec63ea8b06bd2fd256f6b6f0a09b9135d7072d227
SHA3-384 hash: ee92475cdee39ee94cf5b23ab5829a879a24d1db86819dbea237c6ac0a743c4eb8bcb43545081a42a8fe369a2ea5a75f
SHA1 hash: 7e521ba5b862afe525d7682160f67cc10acf1e8d
MD5 hash: da8916e3e1fc4f8f23bdc0a02a76c356
humanhash: purple-butter-ack-arkansas
File name:kworkerd-writeback
Download: download sample
Signature Gafgyt
Create hunting rule
File size:295'244 bytes
First seen:2026-06-10 10:07:51 UTC
Last seen:Never
File type: elf
MIME type:application/x-executable
ssdeep 6144:8M6/UpwfTpttVHKP2JdMVGdyTxEFQOBnmtJVq9BOm:8jUm3/e2JdcKFvItGBOm
TLSH T1BD542B02BF0C0E43E1172FF0263B97F197DFA9A128B4B6506D4EBAC94273D71A545AC9
Magika elf
Reporter abuse_ch
Tags:elf gafgyt upx-dec


Avatar
abuse_ch
UPX decompressed file, sourced from SHA256 f37ed79668941787e69fb196e04e7925a305b337c2f898c1673895b55f5e5747
File size (compressed) :107'096 bytes
File size (de-compressed) :295'244 bytes
Format:linux/ppc32
Packed file: f37ed79668941787e69fb196e04e7925a305b337c2f898c1673895b55f5e5747

Intelligence

File Origin
# of uploads :
1
# of downloads :
99
Origin country :
NL NL
Vendor Threat Intelligence
No detections
Detection(s):
Unix.Trojan.Mirai-10004218-0
Create hunting rule

Unix.Trojan.Mirai-10012200-0
Create hunting rule

Unix.Trojan.Mirai-10012671-0
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Manages services
Connection attempt
Sets a written file as executable
Kills processes
Collects information on the CPU
Creating a file
Launching a process
Opens a port
Changes the time when the file was created, accessed, or modified
Runs as daemon
Changes access rights for a written file
Creating a file in the %temp% directory
Kills critical processes
Creates or modifies files in /cron to set up autorun
Substitutes an application name
Deleting of the original file
Creates or modifies files in /init.d to set up autorun
Status:
terminated
Link:
https://sandbox.kunai.rocks/analysis/6dcd2b89-4970-4242-91a8-23c84958bbf1
Behavior Graph:
Download SVG
%3 guuid=31ca2e53-1800-0000-3576-a4cdbc030000 pid=956 /usr/bin/sudo guuid=54536a55-1800-0000-3576-a4cdbd030000 pid=957 /tmp/sample.bin guuid=31ca2e53-1800-0000-3576-a4cdbc030000 pid=956->guuid=54536a55-1800-0000-3576-a4cdbd030000 pid=957 execve
Gathering data
Result
Threat name:
Mirai, Xmrig
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad.mine
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1925756
Signature
Drops invisible ELF files
Executes itself again with its parent PID as an argument (indicative of hampering debugging)
Executes the "crontab" command typically for achieving persistence
Found strings related to Crypto-Mining
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for submitted file
Opens /sys/class/net/* files useful for querying network interface information
Sample deletes itself
Sample tries to persist itself using cron
Uses known network protocols on non-standard ports
Yara detected Mirai
Yara detected Xmrig cryptocurrency miner
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1925756 Sample: kworkerd-writeback.elf Startdate: 10/06/2026 Architecture: LINUX Score: 100 71 102.148.140.92, 23 ZAIN-ZAMBIAZM Zambia 2->71 73 129.219.99.192, 23 WN-AZ-AS-ArizonaTriUniversityNetworkUS United States 2->73 75 98 other IPs or domains 2->75 77 Malicious sample detected (through community Yara rule) 2->77 79 Multi AV Scanner detection for submitted file 2->79 81 Yara detected Mirai 2->81 83 2 other signatures 2->83 10 kworkerd-writeback.elf 2->10         started        13 systemd sh 2->13         started        15 systemd snapd-env-generator 2->15         started        17 systemd snapd-env-generator 2->17         started        signatures3 process4 signatures5 91 Found strings related to Crypto-Mining 10->91 19 kworkerd-writeback.elf 10->19         started        21 sh sh 13->21         started        23 sh wget 13->23         started        26 sh rm 13->26         started        process6 file7 28 kworkerd-writeback.elf 19->28         started        31 sh wget 21->31         started        34 sh rm 21->34         started        36 sh 21->36         started        38 5 other processes 21->38 67 /tmp/..redis-sentinel, POSIX 23->67 dropped process8 file9 93 Opens /sys/class/net/* files useful for querying network interface information 28->93 95 Sample deletes itself 28->95 40 kworkerd-writeback.elf sh 28->40         started        43 kworkerd-writeback.elf sh 28->43         started        45 kworkerd-writeback.elf sh 28->45         started        49 2 other processes 28->49 69 /dev/shm/.kworkerd, ELF 31->69 dropped 97 Drops invisible ELF files 31->97 47 sh 36->47         started        signatures10 process11 signatures12 89 Executes itself again with its parent PID as an argument (indicative of hampering debugging) 40->89 51 sh crontab 40->51         started        55 sh crontab 43->55         started        57 sh systemctl 45->57         started        59 sh uname 47->59         started        61 sh tr 47->61         started        63 sh systemctl 49->63         started        process13 file14 65 /var/spool/cron/crontabs/tmp.D2GtAf, ASCII 51->65 dropped 85 Sample tries to persist itself using cron 51->85 87 Executes the "crontab" command typically for achieving persistence 51->87 signatures15
Score:
100%
Verdict:
Malware
File Type:
ELF
Link:
https://malprob.io/report/e9ce4a059cbb619aa07380aec63ea8b06bd2fd256f6b6f0a09b9135d7072d227
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/e9ce4a059cbb619aa07380aec63ea8b06bd2fd256f6b6f0a09b9135d7072d227/
Threat name:
Linux.Backdoor.Gafgyt
Create hunting rule
Status:
Malicious
First seen:
2026-06-10 10:11:59 UTC
File Type:
ELF32 Big (Exe)
AV detection:
7 of 36 (19.44%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=5hheubm4xnqzvidtqcxmmpviwbv5f7jfn5vw6cqjxejv24ds2itq._file
Result
Malware family:
n/a
Score:
  1/10
Tags:
linux
Link:
https://tria.ge/reports/260610-l6wnyaat3l/
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/e9ce4a059cbb619aa07380aec63ea8b06bd2fd256f6b6f0a09b9135d7072d227

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:ELF_Toriilike_persist
Create hunting rule
Author:4r4
Description:Detects Torii IoT Botnet (stealthier Mirai alternative)
Reference:Identified via researched data
Rule name:enterpriseapps2
Create hunting rule
Author:Tim Brown @timb_machine
Description:Enterprise apps
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

Gafgyt

elf f37ed79668941787e69fb196e04e7925a305b337c2f898c1673895b55f5e5747

Gafgyt

elf e9ce4a059cbb619aa07380aec63ea8b06bd2fd256f6b6f0a09b9135d7072d227

(this sample)

  
Dropped by
SHA256 f37ed79668941787e69fb196e04e7925a305b337c2f898c1673895b55f5e5747
  
URLhaus
https://urlhaus.abuse.ch/url/3862328/
  
Delivery method
Distributed via web download
  
Dropped by
MD5 23c7b157199176ce45f8e448b4904dcc

Comments