MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 928cbf57e9ff5904a4d612017a47a99fd97efb3d468ece1b81b5a82017f549fd. 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


CoinMiner


Vendor detections: 8


Intelligence 8 IOCs YARA 4 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 928cbf57e9ff5904a4d612017a47a99fd97efb3d468ece1b81b5a82017f549fd
SHA3-384 hash: 2745202f7a582c2c667c4ff3b15281e0f3b955d8407801ab087dff02ff1f571c10ac2f325f432565bb31f5d28280edb0
SHA1 hash: b236ecdb4b32b9ee49db6b9f4b2d141299375094
MD5 hash: 9165758bed0c42edf44ef0fbf4fda346
humanhash: rugby-jig-london-vegan
File name:kworkerd-netns
Download: download sample
Signature CoinMiner
Create hunting rule
File size:333'388 bytes
First seen:2026-06-25 18:16:02 UTC
Last seen:2026-06-25 19:42:31 UTC
File type: elf
MIME type:application/x-sharedlib
ssdeep 6144:OoUwfwcdIiuUybOHrQO53mXy1fJyo8DQui7IcpAwiGNH+VKC:OoiBOcC1DsLHSH+Vd
TLSH T1F664390A77608FE4E274C13006F74B96A6FE11A656F24985D33DEE207E9038C6A5FF94
telfhash t1da41e984a83209ef7efb55008c642625c506e625f8b38f20ef18d6c1476842eb64ee4f
Magika elf
Reporter abuse_ch
Tags:CoinMiner elf upx-dec


Avatar
abuse_ch
UPX decompressed file, sourced from SHA256 22fb0c5e2a8ac8087df00e90507edeb9a57756d5ddb81d78952ae7ce4e690c51
File size (compressed) :131'996 bytes
File size (de-compressed) :333'388 bytes
Format:linux/mips
Packed file: 22fb0c5e2a8ac8087df00e90507edeb9a57756d5ddb81d78952ae7ce4e690c51

Intelligence

File Origin
# of uploads :
2
# of downloads :
77
Origin country :
NL NL
Vendor Threat Intelligence
No detections
Detection(s):
Unix.Trojan.Mirai-10058997-0
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Connection attempt
Receives data from a server
Runs as daemon
Sets a written file as executable
Changes the time when the file was created, accessed, or modified
Launching a process
Manages services
DNS request
Opens a port
Collects information on the CPU
Creating a file in the %temp% directory
Changes access rights for a written file
Creating a file
Sends data to a server
Kills critical processes
Creates or modifies files in /cron to set up autorun
Substitutes an application name
Deleting of the original file
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
base64 gcc mirai
Link:
https://www.filescan.io/uploads/6a3d7079365b598224b9b732/reports/408aec2a-c30e-4679-80de-e42445f5a531/overview
Verdict:
Malicious
File Type:
elf.32.be
First seen:
2026-06-25T17:09:00Z UTC
Last seen:
2026-06-26T21:53:00Z UTC
Hits:
~10
Link:
https://opentip.kaspersky.com/928cbf57e9ff5904a4d612017a47a99fd97efb3d468ece1b81b5a82017f549fd/results?tab=lookup
Status:
terminated
Link:
https://sandbox.kunai.rocks/analysis/f0a7b993-fa91-44ad-b1e2-e014ceac876b
Behavior Graph:
Download SVG
%3 guuid=1d42206e-1900-0000-5539-8d752e140000 pid=5166 /usr/bin/sudo guuid=f759f16f-1900-0000-5539-8d752f140000 pid=5167 /tmp/sample.bin guuid=1d42206e-1900-0000-5539-8d752e140000 pid=5166->guuid=f759f16f-1900-0000-5539-8d752f140000 pid=5167 execve
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/535207b1-86a5-419f-bfc0-7f3a11206331
Result
Threat name:
Xmrig
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad.mine
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1933878
Signature
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
Contains symbols with names commonly found in malware
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
Executes the "nc" (netcat) command used to establish arbitrary TCP or UDP connections and listens
Found strings related to Crypto-Mining
Opens /sys/class/net/* files useful for querying network interface information
Performs DNS TXT record lookups
Sample deletes itself
Sample tries to persist itself using cron
Searches for CPU information (likely indicative of DDoS capability)
Yara detected Xmrig cryptocurrency miner
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1933878 Sample: kworkerd-netns.elf Startdate: 25/06/2026 Architecture: LINUX Score: 100 84 api.robotmarkethub.com 2->84 86 91.239.211.89, 36028, 36030, 43466 HOSTKEY-ASNL Germany 2->86 88 99 other IPs or domains 2->88 98 Antivirus detection for dropped file 2->98 100 Antivirus / Scanner detection for submitted sample 2->100 102 Yara detected Xmrig cryptocurrency miner 2->102 104 Contains symbols with names commonly found in malware 2->104 12 systemd sh 2->12         started        14 kworkerd-netns.elf 2->14         started        17 systemd snapd-env-generator 2->17         started        19 3 other processes 2->19 signatures3 106 Performs DNS TXT record lookups 84->106 process4 signatures5 21 sh sh 12->21         started        24 sh wget 12->24         started        26 sh rm 12->26         started        122 Found strings related to Crypto-Mining 14->122 28 kworkerd-netns.elf 14->28         started        process6 file7 80 /dev/shm/.exectest.6266, POSIX 21->80 dropped 30 sh .d 21->30         started        32 sh wget 21->32         started        36 sh 21->36         started        40 28 other processes 21->40 82 /tmp/..redis-sentinel, POSIX 24->82 dropped 38 kworkerd-netns.elf 28->38         started        process8 file9 42 .d 30->42         started        74 /dev/shm/.d, ELF 32->74 dropped 90 Drops invisible ELF files 32->90 44 sh grep 36->44         started        47 kworkerd-netns.elf sh 38->47         started        49 kworkerd-netns.elf sh 38->49         started        92 Searches for CPU information (likely indicative of DDoS capability) 40->92 94 Sample deletes itself 40->94 96 Executes the "nc" (netcat) command used to establish arbitrary TCP or UDP connections and listens 40->96 signatures10 process11 signatures12 51 .d 42->51         started        120 Searches for CPU information (likely indicative of DDoS capability) 44->120 55 sh systemctl 47->55         started        57 sh systemctl 49->57         started        process13 file14 76 /var/spool/cron/crontabs/root, ASCII 51->76 dropped 108 Opens /sys/class/net/* files useful for querying network interface information 51->108 110 Sample deletes itself 51->110 112 Sample tries to persist itself using cron 51->112 59 .d sh 51->59         started        62 .d sh 51->62         started        64 .d 51->64         started        66 199 other processes 51->66 signatures15 process16 signatures17 118 Executes itself again with its parent PID as an argument (indicative of hampering debugging) 59->118 68 sh crontab 59->68         started        72 sh crontab 62->72         started        process18 file19 78 /var/spool/cron/crontabs/tmp.wJWJsO, ASCII 68->78 dropped 114 Sample tries to persist itself using cron 68->114 116 Executes the "crontab" command typically for achieving persistence 68->116 signatures20
Score:
100%
Verdict:
Malware
File Type:
ELF
Link:
https://malprob.io/report/928cbf57e9ff5904a4d612017a47a99fd97efb3d468ece1b81b5a82017f549fd
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/928cbf57e9ff5904a4d612017a47a99fd97efb3d468ece1b81b5a82017f549fd/
Threat name:
Linux.Trojan.Multiverze
Create hunting rule
Status:
Malicious
First seen:
2026-06-25 18:16:29 UTC
File Type:
ELF32 Big (SO)
AV detection:
12 of 24 (50.00%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=skgl6v7j75mqjjgwciaxur5jt7mx56z5i2hm4g4bwwucaf7vjh6q._file
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/928cbf57e9ff5904a4d612017a47a99fd97efb3d468ece1b81b5a82017f549fd

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_arm_mips_ko_so
Create hunting rule
Rule name:enterpriseapps2
Create hunting rule
Author:Tim Brown @timb_machine
Description:Enterprise apps
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.

Web download

CoinMiner

elf 22fb0c5e2a8ac8087df00e90507edeb9a57756d5ddb81d78952ae7ce4e690c51

CoinMiner

elf 928cbf57e9ff5904a4d612017a47a99fd97efb3d468ece1b81b5a82017f549fd

(this sample)

  
Dropped by
SHA256 22fb0c5e2a8ac8087df00e90507edeb9a57756d5ddb81d78952ae7ce4e690c51
  
URLhaus
https://urlhaus.abuse.ch/url/3868019/
  
Delivery method
Distributed via web download
  
Dropped by
MD5 5c418512c9c5e322a48803a1d5d0a851

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