MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b53f87d91c9eada23e997e50095e949f105b1b3d062281f22489986f445509db. 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: 5

Intelligence 5 IOCs YARA 1 File information Comments

SHA256 hash:	b53f87d91c9eada23e997e50095e949f105b1b3d062281f22489986f445509db
SHA3-384 hash:	bdca74ecb5d9b5e4233b0e9ad2643d800a847bc4ac9c8047c9c3600915f662ee313eebd0b56459169279c74bba7098ac
SHA1 hash:	a61617593d62cd23025720509e34a6d1d4b12cc5
MD5 hash:	c4e99904334a9b1b92f6dc77b5f3fd00
humanhash:	happy-stream-edward-network
File name:	k.php
Download:	download sample
File size:	45'501 bytes
First seen:	2026-07-24 20:20:49 UTC
Last seen:	2026-07-25 01:12:42 UTC
File type:	sh
MIME type:	text/x-shellscript
ssdeep	768:dr9NyXsZztCY9GKYpr9GKYp82fkR4nnA9GKYpr9GKYp82fkR4nnx:lHusZMco
TLSH	T122136D6526953C25AE99883B5C7F2F0CBDA983E2304491DDBF8A3CF18C15A9CE31871D
TrID	70.0% (.SH) Linux/UNIX shell script (7000/1) 30.0% (.) Unix-like shebang (var.3) (gen) (3000/1)
Magika	shell
Reporter	abuse_ch
Tags:	sh

Intelligence

File Origin

# of uploads :

# of downloads :

Origin country :

Vendor Threat Intelligence

No detections

Detection(s):

SecuriteInfo.com.Linux.BackDoor.Siggen.759-2.UNOFFICIAL

Verdict:

Malicious

Threat level:

10/10

Confidence:

100%

Tags:

base64 bash evasive lolbin masquerade obfuscated

Link:

https://www.filescan.io/uploads/6a63c94f12b9cea656d8f23b/reports/1247c7e1-0379-426a-8c1c-95f1f5addf12/overview

Status:

terminated

Link:

https://sandbox.kunai.rocks/analysis/04eaa61d-1e03-499c-9c20-24f1f92be0c6

Behavior Graph:

Download SVG

Score:

94%

Verdict:

Malware

File Type:

SCRIPT

Link:

https://malprob.io/report/b53f87d91c9eada23e997e50095e949f105b1b3d062281f22489986f445509db

Detection:

n/a

Link:

https://mwdb.cert.pl/sample/b53f87d91c9eada23e997e50095e949f105b1b3d062281f22489986f445509db/

Threat name:

Linux.Trojan.Generic

Status:

Suspicious

First seen:

2026-07-24 20:21:35 UTC

File Type:

Text (Shell)

AV detection:

12 of 36 (33.33%)

Threat level:

5/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=wu7ypwi4t2w2epuzpziasxuut4ifwgz5ayrid4rergmg6rcvbhnq._file

Result

Malware family:

n/a

Score:

8/10

Tags:

antivm credential_access defense_evasion discovery execution linux persistence privilege_escalation

Link:

https://tria.ge/reports/260724-y49h8sen8t/

Behaviour

Enumerates kernel/hardware configuration

Reads runtime system information

Writes file to tmp directory

Deobfuscate/Decode Files or Information

Checks CPU configuration

Creates .desktop file

Modifies Bash startup script

Adds a user to the system

Creates/modifies Cron job

Creates/modifies environment variables

Deletes log files

Enumerates running processes

Modifies rc script

File and Directory Permissions Modification

Deletes Audit logs

Deletes system logs

OS Credential Dumping

Modifies password files for system users/ groups

Please note that we are no longer able to provide a coverage score for Virus Total.

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:	SUSP_LNX_Base64_Exec_Apr24 Create hunting rule
Author:	Christian Burkard
Description:	Detects suspicious base64 encoded shell commands (as seen in Palo Alto CVE-2024-3400 exploitation)
Reference:	Internal Research

File information

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

Web download

sh b53f87d91c9eada23e997e50095e949f105b1b3d062281f22489986f445509db

(this sample)

URLhaus

https://urlhaus.abuse.ch/url/3813602/

Delivery method

Distributed via web download

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