MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 4bb095a58fff5ed716654429a5d3e85659f5e88fdb3d70991fe74ea5d86572cf. 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: 7


Intelligence 7 IOCs YARA 1 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 4bb095a58fff5ed716654429a5d3e85659f5e88fdb3d70991fe74ea5d86572cf
SHA3-384 hash: a87b1a986c76649c629d74112c97d3f1658f7906547caeda1be6f506b5ede348a1a231d0042ab0e64b0d25466999fc37
SHA1 hash: 14d3c6ae2040d6c7ab5d498ecf59008fb1f20eed
MD5 hash: df05c04910a565e6f158d8c430d096fc
humanhash: delta-summer-shade-beer
File name:kworkerd-writeback
Download: download sample
Signature CoinMiner
Create hunting rule
File size:116'080 bytes
First seen:2026-06-20 20:27:37 UTC
Last seen:Never
File type: elf
MIME type:application/x-sharedlib
ssdeep 3072:W5Vg0dAAH8/NasNzeCw+TFH5WuyXHPCia3SxD4hCuqmcNos4u+qgwp4D:WY0dr8/NxzVTWVHPCxSfHmcNoo2
TLSH T181B31228E1D70837FDFACDE6A464DD6EB342205FB3D22C611124FBEEB580D9A564070A
Magika unknown
Reporter abuse_ch
Tags:CoinMiner elf UPX
File size (compressed) :116'080 bytes
File size (de-compressed) :329'176 bytes
Format:linux/ppc32
Unpacked file: c32470f4960e3267292b81005f792a1755d7b708aec15d083f205cc978f3a6e3

Intelligence

File Origin
# of uploads :
1
# of downloads :
68
Origin country :
DE DE
Vendor Threat Intelligence
No detections
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a file in the %temp% directory
Connection attempt
Opens a port
Changes access rights for a written file
Receives data from a server
Changes the time when the file was created, accessed, or modified
DNS request
Runs as daemon
Sets a written file as executable
Manages services
Collects information on the CPU
Creating a file
Sends data to a server
Launching a process
Creates or modifies files in /cron to set up autorun
Substitutes an application name
Kills critical processes
Deleting of the original file
Creates or modifies files in /init.d to set up autorun
Verdict:
Unknown
Threat level:
  0/10
Confidence:
100%
Tags:
packed upx
Link:
https://www.filescan.io/uploads/6a36f7e062d0679105f9e710/reports/63b218f7-a465-434b-a6a1-69a197226b59/overview
Verdict:
Malicious
File Type:
elf.32.be
First seen:
2026-06-20T17:36:00Z UTC
Last seen:
2026-06-21T17:52:00Z UTC
Hits:
~10
Link:
https://opentip.kaspersky.com/4bb095a58fff5ed716654429a5d3e85659f5e88fdb3d70991fe74ea5d86572cf/results?tab=lookup
Status:
terminated
Link:
https://sandbox.kunai.rocks/analysis/28f873a4-c08d-4c6b-844d-96e9c709c93a
Behavior Graph:
Download SVG
%3 guuid=89026ad7-1a00-0000-4863-a4f1900c0000 pid=3216 /usr/bin/sudo guuid=477f77d9-1a00-0000-4863-a4f1970c0000 pid=3223 /tmp/sample.bin guuid=89026ad7-1a00-0000-4863-a4f1900c0000 pid=3216->guuid=477f77d9-1a00-0000-4863-a4f1970c0000 pid=3223 execve
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/f201b5be-1230-4421-ba73-d3dc3715b4cd
Result
Threat name:
Xmrig
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad.mine
Score:
76 / 100
Link:
https://www.joesandbox.com/analysis/1931376
Signature
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
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
Yara detected Xmrig cryptocurrency miner
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1931376 Sample: kworkerd-writeback.elf Startdate: 20/06/2026 Architecture: LINUX Score: 76 57 api.robotmarkethub.com 2->57 59 91.239.211.89, 47268, 47270, 47272 HOSTKEY-ASNL Germany 2->59 63 Yara detected Xmrig cryptocurrency miner 2->63 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 65 Performs DNS TXT record lookups 57->65 process4 signatures5 67 Found strings related to Crypto-Mining 10->67 19 kworkerd-writeback.elf 10->19         started        21 sh wget 13->21         started        24 sh sh 13->24         started        26 sh rm 13->26         started        process6 file7 28 kworkerd-writeback.elf 19->28         started        51 /tmp/..redis-sentinel, Bourne-Again 21->51 dropped process8 file9 55 /var/spool/cron/crontabs/root, ASCII 28->55 dropped 73 Opens /sys/class/net/* files useful for querying network interface information 28->73 75 Sample deletes itself 28->75 77 Sample tries to persist itself using cron 28->77 32 kworkerd-writeback.elf sh 28->32         started        35 kworkerd-writeback.elf sh 28->35         started        37 kworkerd-writeback.elf sh 28->37         started        39 kworkerd-writeback.elf sh 28->39         started        signatures10 process11 signatures12 61 Executes itself again with its parent PID as an argument (indicative of hampering debugging) 32->61 41 sh crontab 32->41         started        45 sh crontab 35->45         started        47 sh systemctl 37->47         started        49 sh systemctl 39->49         started        process13 file14 53 /var/spool/cron/crontabs/tmp.2JQGME, ASCII 41->53 dropped 69 Sample tries to persist itself using cron 41->69 71 Executes the "crontab" command typically for achieving persistence 41->71 signatures15
Score:
100%
Verdict:
Malware
File Type:
ELF
Link:
https://malprob.io/report/4bb095a58fff5ed716654429a5d3e85659f5e88fdb3d70991fe74ea5d86572cf
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/4bb095a58fff5ed716654429a5d3e85659f5e88fdb3d70991fe74ea5d86572cf/
Threat name:
Linux.Trojan.Qwexlafiba
Create hunting rule
Status:
Malicious
First seen:
2026-06-20 18:46:57 UTC
File Type:
ELF32 Big (SO)
AV detection:
10 of 24 (41.67%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=joyjljmp75pnoftfiqu2lu7ikzm7l2ep3m6xbgi745hklwdfolhq._file
Result
Malware family:
n/a
Score:
  5/10
Tags:
linux upx
Link:
https://tria.ge/reports/260620-y86yxahv2m/
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/4bb095a58fff5ed716654429a5d3e85659f5e88fdb3d70991fe74ea5d86572cf

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:CP_Script_Inject_Detector
Create hunting rule
Author:DiegoAnalytics
Description:Detects attempts to inject code into another process across PE, ELF, Mach-O binaries

File information

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

Web download

CoinMiner

elf 4bb095a58fff5ed716654429a5d3e85659f5e88fdb3d70991fe74ea5d86572cf

(this sample)

CoinMiner

elf c32470f4960e3267292b81005f792a1755d7b708aec15d083f205cc978f3a6e3

  
URLhaus
https://urlhaus.abuse.ch/url/3868024/
  
Delivery method
Distributed via web download
  
Dropping
SHA256 c32470f4960e3267292b81005f792a1755d7b708aec15d083f205cc978f3a6e3
  
Dropping
MD5 3d82d846802dd2b38d95e5438a84fe33

Comments