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Linux Analysis Report
x-3.2-.Sakura.elf

Overview

General Information

Sample name:	x-3.2-.Sakura.elf
Analysis ID:	1633071
MD5:	5facc88ccf81fbb0b6e7172a766f52c3
SHA1:	2e6b245c95dcbe814ca6d5a2bf6bff90e0d06b6d
SHA256:	d496b895b3fd172325ffc99764043fd07e3275eaa29ef1b5adf3e86a7e173c21
Tags:	elfuser-abuse_ch
Infos:

Detection

Gafgyt, Mirai

Score:	80
Range:	0 - 100

Signatures

Found malware configuration

Malicious sample detected (through community Yara rule)

Multi AV Scanner detection for submitted file

Yara detected Gafgyt

Yara detected Mirai

Sample contains strings that are user agent strings indicative of HTTP manipulation

Yara signature match

Classification

General Information

Joe Sandbox version:	42.0.0 Malachite
Analysis ID:	1633071
Start date and time:	2025-03-09 18:16:21 +01:00
Joe Sandbox product:	CloudBasic
Overall analysis duration:	0h 4m 34s
Hypervisor based Inspection enabled:	false
Report type:	full
Cookbook file name:	defaultlinuxfilecookbook.jbs
Analysis system description:	Ubuntu Linux 20.04 x64 (Kernel 5.4.0-72, Firefox 91.0, Evince Document Viewer 3.36.10, LibreOffice 6.4.7.2, OpenJDK 11.0.11)
Analysis Mode:	default
Sample name:	x-3.2-.Sakura.elf
Detection:	MAL
Classification:	mal80.troj.linELF@0/0@2/0

Runtime Messages

Command:	/tmp/x-3.2-.Sakura.elf
PID:	5472
Exit Code:	139
Exit Code Info:	SIGSEGV (11) Segmentation fault invalid memory reference
Killed:	False
Standard Output:
Standard Error:

Process Tree

system is lnxubuntu20

x-3.2-.Sakura.elf (PID: 5472, Parent: 5390, MD5: 5facc88ccf81fbb0b6e7172a766f52c3) Arguments: /tmp/x-3.2-.Sakura.elf

cleanup

Malware Threat Intel

Provided by

Name	Description	Attribution	Blogpost URLs	Link
Bashlite, Gafgyt	Bashlite is a malware family which infects Linux systems in order to launch distributed denial-of-service attacks (DDoS). Originally it was also known under the name Bashdoor, but this term now refers to the exploit method used by the malware. It has been used to launch attacks of up to 400 Gbps.	No Attribution	http://blog.trendmicro.com/trendlabs-security-intelligence/bashlite-affects-devices-running-on-busybox/ https://blog.cyber5w.com/gafgyt-backdoor-analysis https://blog.netlab.360.com/gafgtyt_tor-and-necro-are-on-the-move-again/ https://blog.netlab.360.com/public-cloud-threat-intelligence-202203/ https://blog.netlab.360.com/some_details_of_the_ddos_attacks_targeting_ukraine_and_russia_in_recent_days/	https://malpedia.caad.fkie.fraunhofer.de/details/elf.bashlite

Name	Description	Attribution	Blogpost URLs	Link
Mirai	Mirai is one of the first significant botnets targeting exposed networking devices running Linux. Found in August 2016 by MalwareMustDie, its name means "future" in Japanese. Nowadays it targets a wide range of networked embedded devices such as IP cameras, home routers (many vendors involved), and other IoT devices. Since the source code was published on "Hack Forums" many variants of the Mirai family appeared, infecting mostly home networks all around the world.	No Attribution	http://osint.bambenekconsulting.com/feeds/ http://www.simonroses.com/2016/10/mirai-ddos-botnet-source-code-binary-analysis/ https://blog.malwaremustdie.org/2020/02/mmd-0065-2021-linuxmirai-fbot-re.html https://blog.netlab.360.com/another-lilin-dvr-0-day-being-used-to-spread-mirai-en/ https://blog.netlab.360.com/mirai_ptea-botnet-is-exploiting-undisclosed-kguard-dvr-vulnerability-en/	https://malpedia.caad.fkie.fraunhofer.de/details/elf.mirai

Yara Signatures

Initial Sample

Source	Rule	Description	Author	Strings
x-3.2-.Sakura.elf	JoeSecurity_Gafgyt	Yara detected Gafgyt	Joe Security
x-3.2-.Sakura.elf	JoeSecurity_Mirai_8	Yara detected Mirai	Joe Security
x-3.2-.Sakura.elf	Linux_Trojan_Gafgyt_28a2fe0c	unknown	unknown	0xc513:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0xc527:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0xc53b:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0xc54f:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0xc563:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0xc577:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0xc58b:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0xc59f:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0xc5b3:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0xc5c7:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0xc5db:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0xc5ef:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0xc603:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0xc617:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0xc62b:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0xc63f:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0xc653:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0xc667:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0xc67b:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0xc68f:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0xc6a3:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F
x-3.2-.Sakura.elf	Linux_Trojan_Gafgyt_6122acdf	unknown	unknown	0x592:$a: E8 B0 00 FC 8B 7D E8 F2 AE 89 C8 F7 D0 48 48 89 45 F8 EB 03 FF
x-3.2-.Sakura.elf	Linux_Trojan_Gafgyt_1b2e2a3a	unknown	unknown	0x820:$a: 83 7D 18 00 74 25 8B 45 1C 83 E0 02 85 C0 74 1B C7 44 24 04 2D 00
x-3.2-.Sakura.elf	Linux_Trojan_Gafgyt_9127f7be	unknown	unknown	0xc81:$a: E4 F7 E1 89 D0 C1 E8 03 89 45 E8 8B 45 E8 01 C0 03 45 E8 C1
Click to see the 1 entries

Memory Dumps

Source	Rule	Description	Author	Strings
5472.1.0000000008048000.0000000008057000.r-x.sdmp	JoeSecurity_Mirai_8	Yara detected Mirai	Joe Security
5472.1.0000000008048000.0000000008057000.r-x.sdmp	Linux_Trojan_Gafgyt_28a2fe0c	unknown	unknown	0xc513:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0xc527:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0xc53b:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0xc54f:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0xc563:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0xc577:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0xc58b:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0xc59f:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0xc5b3:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0xc5c7:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0xc5db:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0xc5ef:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0xc603:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0xc617:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0xc62b:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0xc63f:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0xc653:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0xc667:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0xc67b:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0xc68f:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0xc6a3:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F
5472.1.0000000008048000.0000000008057000.r-x.sdmp	Linux_Trojan_Gafgyt_6122acdf	unknown	unknown	0x592:$a: E8 B0 00 FC 8B 7D E8 F2 AE 89 C8 F7 D0 48 48 89 45 F8 EB 03 FF
5472.1.0000000008048000.0000000008057000.r-x.sdmp	Linux_Trojan_Gafgyt_1b2e2a3a	unknown	unknown	0x820:$a: 83 7D 18 00 74 25 8B 45 1C 83 E0 02 85 C0 74 1B C7 44 24 04 2D 00
5472.1.0000000008048000.0000000008057000.r-x.sdmp	Linux_Trojan_Gafgyt_9127f7be	unknown	unknown	0xc81:$a: E4 F7 E1 89 D0 C1 E8 03 89 45 E8 8B 45 E8 01 C0 03 45 E8 C1
Process Memory Space: x-3.2-.Sakura.elf PID: 5472	Linux_Trojan_Gafgyt_28a2fe0c	unknown	unknown	0xf55:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0xf69:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0xf7d:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0xf91:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0xfa5:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0xfb9:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0xfcd:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0xfe1:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0xff5:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0x1009:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0x101d:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0x1031:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0x1045:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0x1059:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0x106d:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0x1081:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0x1095:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0x10a9:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0x10bd:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0x10d1:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0x10e5:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F
Click to see the 1 entries

Suricata Signatures

⊘No Suricata rule has matched

Joe Sandbox Signatures

• AV Detection
• Networking
• System Summary
• Stealing of Sensitive Information
• Remote Access Functionality

Click to jump to signature section

Show All Signature Results

AV Detection

Found malware configuration

Source: x-3.2-.Sakura.elf

Malware Configuration Extractor: Gafgyt {"C2 url": "205.185.115.242:12345"}

Multi AV Scanner detection for submitted file

Source: x-3.2-.Sakura.elf	Virustotal: Detection: 29%			Perma Link
Source: x-3.2-.Sakura.elf	ReversingLabs: Detection: 28%

Source: unknown	UDP traffic detected without corresponding DNS query: 1.1.1.1
Source: unknown	UDP traffic detected without corresponding DNS query: 1.1.1.1

Source: global traffic

DNS traffic detected: DNS query: daisy.ubuntu.com

System Summary

Malicious sample detected (through community Yara rule)

Source: x-3.2-.Sakura.elf, type: SAMPLE	Matched rule: Linux_Trojan_Gafgyt_28a2fe0c Author: unknown
Source: x-3.2-.Sakura.elf, type: SAMPLE	Matched rule: Linux_Trojan_Gafgyt_6122acdf Author: unknown
Source: x-3.2-.Sakura.elf, type: SAMPLE	Matched rule: Linux_Trojan_Gafgyt_1b2e2a3a Author: unknown
Source: x-3.2-.Sakura.elf, type: SAMPLE	Matched rule: Linux_Trojan_Gafgyt_9127f7be Author: unknown
Source: 5472.1.0000000008048000.0000000008057000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Gafgyt_28a2fe0c Author: unknown
Source: 5472.1.0000000008048000.0000000008057000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Gafgyt_6122acdf Author: unknown
Source: 5472.1.0000000008048000.0000000008057000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Gafgyt_1b2e2a3a Author: unknown
Source: 5472.1.0000000008048000.0000000008057000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Gafgyt_9127f7be Author: unknown
Source: Process Memory Space: x-3.2-.Sakura.elf PID: 5472, type: MEMORYSTR	Matched rule: Linux_Trojan_Gafgyt_28a2fe0c Author: unknown

Source: x-3.2-.Sakura.elf, type: SAMPLE	Matched rule: Linux_Trojan_Gafgyt_28a2fe0c os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Gafgyt, fingerprint = a2c6beaec18ca876e8487c11bcc7a29279669588aacb7d3027d8d8df8f5bcead, id = 28a2fe0c-eed5-4c79-81e6-3b11b73a4ebd, last_modified = 2021-09-16
Source: x-3.2-.Sakura.elf, type: SAMPLE	Matched rule: Linux_Trojan_Gafgyt_6122acdf os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Gafgyt, fingerprint = 283275705c729be23d7dc75056388ecae00390bd25ee7b66b0cfc9b85feee212, id = 6122acdf-1eef-45ea-83ea-699d21c2dc20, last_modified = 2021-09-16
Source: x-3.2-.Sakura.elf, type: SAMPLE	Matched rule: Linux_Trojan_Gafgyt_1b2e2a3a reference_sample = 899c072730590003b98278bdda21c15ecaa2f49ad51e417ed59e88caf054a72d, os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Gafgyt, fingerprint = 6f24b67d0a6a4fc4e1cfea5a5414b82af1332a3e6074eb2178aee6b27702b407, id = 1b2e2a3a-1302-41c7-be99-43edb5563294, last_modified = 2021-09-16
Source: x-3.2-.Sakura.elf, type: SAMPLE	Matched rule: Linux_Trojan_Gafgyt_9127f7be reference_sample = 899c072730590003b98278bdda21c15ecaa2f49ad51e417ed59e88caf054a72d, os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Gafgyt, fingerprint = 72c742cb8b11ddf030e10f67e13c0392748dcd970394ec77ace3d2baa705a375, id = 9127f7be-6e82-46a1-9f11-0b3570b0cd76, last_modified = 2021-09-16
Source: 5472.1.0000000008048000.0000000008057000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Gafgyt_28a2fe0c os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Gafgyt, fingerprint = a2c6beaec18ca876e8487c11bcc7a29279669588aacb7d3027d8d8df8f5bcead, id = 28a2fe0c-eed5-4c79-81e6-3b11b73a4ebd, last_modified = 2021-09-16
Source: 5472.1.0000000008048000.0000000008057000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Gafgyt_6122acdf os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Gafgyt, fingerprint = 283275705c729be23d7dc75056388ecae00390bd25ee7b66b0cfc9b85feee212, id = 6122acdf-1eef-45ea-83ea-699d21c2dc20, last_modified = 2021-09-16
Source: 5472.1.0000000008048000.0000000008057000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Gafgyt_1b2e2a3a reference_sample = 899c072730590003b98278bdda21c15ecaa2f49ad51e417ed59e88caf054a72d, os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Gafgyt, fingerprint = 6f24b67d0a6a4fc4e1cfea5a5414b82af1332a3e6074eb2178aee6b27702b407, id = 1b2e2a3a-1302-41c7-be99-43edb5563294, last_modified = 2021-09-16
Source: 5472.1.0000000008048000.0000000008057000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Gafgyt_9127f7be reference_sample = 899c072730590003b98278bdda21c15ecaa2f49ad51e417ed59e88caf054a72d, os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Gafgyt, fingerprint = 72c742cb8b11ddf030e10f67e13c0392748dcd970394ec77ace3d2baa705a375, id = 9127f7be-6e82-46a1-9f11-0b3570b0cd76, last_modified = 2021-09-16
Source: Process Memory Space: x-3.2-.Sakura.elf PID: 5472, type: MEMORYSTR	Matched rule: Linux_Trojan_Gafgyt_28a2fe0c os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Gafgyt, fingerprint = a2c6beaec18ca876e8487c11bcc7a29279669588aacb7d3027d8d8df8f5bcead, id = 28a2fe0c-eed5-4c79-81e6-3b11b73a4ebd, last_modified = 2021-09-16

Source: classification engine

Classification label: mal80.troj.linELF@0/0@2/0

Stealing of Sensitive Information

Yara detected Gafgyt

Source: Yara match

File source: x-3.2-.Sakura.elf, type: SAMPLE

Yara detected Mirai

Source: Yara match	File source: x-3.2-.Sakura.elf, type: SAMPLE
Source: Yara match	File source: 5472.1.0000000008048000.0000000008057000.r-x.sdmp, type: MEMORY

Source: Initial sample	User agent string found: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/60.0.3112.113 Safari/537.36
Source: Initial sample	User agent string found: Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/60.0.3112.90 Safari/537.36
Source: Initial sample	User agent string found: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/44.0.2403.157 Safari/537.36
Source: Initial sample	User agent string found: Mozilla/5.0 (Windows NT 5.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/46.0.2490.71 Safari/537.36
Source: Initial sample	User agent string found: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3497.100 Safari/537.36
Source: Initial sample	User agent string found: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.132 Safari/537.36
Source: Initial sample	User agent string found: Mozilla/5.0 (Windows NT 5.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/60.0.3112.90 Safari/537.36

Remote Access Functionality

Yara detected Gafgyt

Source: Yara match

File source: x-3.2-.Sakura.elf, type: SAMPLE

Yara detected Mirai

Source: Yara match	File source: x-3.2-.Sakura.elf, type: SAMPLE
Source: Yara match	File source: 5472.1.0000000008048000.0000000008057000.r-x.sdmp, type: MEMORY

Mitre Att&ck Matrix

Reconnaissance	Resource Development	Initial Access	Execution	Persistence	Privilege Escalation	Defense Evasion	Credential Access	Discovery	Lateral Movement	Collection	Command and Control	Exfiltration	Impact
Gather Victim Identity Information	Acquire Infrastructure	Valid Accounts	Windows Management Instrumentation	Path Interception	Path Interception	Direct Volume Access	OS Credential Dumping	System Service Discovery	Remote Services	Data from Local System	1 Data Obfuscation	Exfiltration Over Other Network Medium	Abuse Accessibility Features
Credentials	Domains	Default Accounts	Scheduled Task/Job	Boot or Logon Initialization Scripts	Boot or Logon Initialization Scripts	Rootkit	LSASS Memory	Application Window Discovery	Remote Desktop Protocol	Data from Removable Media	1 Non-Application Layer Protocol	Exfiltration Over Bluetooth	Network Denial of Service
Email Addresses	DNS Server	Domain Accounts	At	Logon Script (Windows)	Logon Script (Windows)	Obfuscated Files or Information	Security Account Manager	Query Registry	SMB/Windows Admin Shares	Data from Network Shared Drive	1 Application Layer Protocol	Automated Exfiltration	Data Encrypted for Impact

Malware Configuration

Threatname: Gafgyt

{
  "C2 url": "205.185.115.242:12345"
}

Behavior Graph

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Legend:

Process
Signature
Created File
DNS/IP Info
Is Dropped
Number of created Files
Is malicious
Internet

Antivirus, Machine Learning and Genetic Malware Detection

Initial Sample

Source	Detection	Scanner	Label	Link
x-3.2-.Sakura.elf	30%	Virustotal		Browse
x-3.2-.Sakura.elf	29%	ReversingLabs	Linux.Trojan.Mirai

Dropped Files

⊘No Antivirus matches

Domains

⊘No Antivirus matches

URLs

⊘No Antivirus matches

Domains and IPs

Download Network PCAP: filtered – full

Contacted Domains

Name	IP	Active	Malicious	Antivirus Detection	Reputation
daisy.ubuntu.com	162.213.35.25	true	false		high

Contacted URLs

Name	Malicious	Antivirus Detection	Reputation
205.185.115.242:12345	false		high

World Map of Contacted IPs

⊘No contacted IP infos

Joe Sandbox View / Context

IPs

⊘No context

Domains

Match	Associated Sample Name / URL	SHA 256	Detection	Threat Name	Link	Context
daisy.ubuntu.com	a-r.m-4.Sakura.elf	Get hash	malicious	Gafgyt, Mirai	Browse	162.213.35.25
	a-r.m-6.Sakura.elf	Get hash	malicious	Gafgyt, Mirai	Browse	162.213.35.25
	a-r.m-7.Sakura.elf	Get hash	malicious	Gafgyt, Mirai	Browse	162.213.35.25
	gif.elf	Get hash	malicious	Unknown	Browse	162.213.35.25
	.i.elf	Get hash	malicious	Unknown	Browse	162.213.35.25
	apep.arm.elf	Get hash	malicious	Unknown	Browse	162.213.35.24
	jaws.elf	Get hash	malicious	Unknown	Browse	162.213.35.25
	SecuriteInfo.com.Linux.Siggen.9999.21334.3171.elf	Get hash	malicious	Unknown	Browse	162.213.35.24
	SecuriteInfo.com.Linux.Siggen.9999.31985.32179.elf	Get hash	malicious	Unknown	Browse	162.213.35.24
	apep.arm5.elf	Get hash	malicious	Unknown	Browse	162.213.35.24

ASNs

⊘No context

JA3 Fingerprints

⊘No context

Dropped Files

⊘No context

Created / dropped Files

⊘No created / dropped files found

Static File Info

General

File type:	ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), statically linked, stripped
Entropy (8bit):	6.31204237624245
TrID:	ELF Executable and Linkable format (Linux) (4029/14) 50.16% ELF Executable and Linkable format (generic) (4004/1) 49.84%
File name:	x-3.2-.Sakura.elf
File size:	85'208 bytes
MD5:	5facc88ccf81fbb0b6e7172a766f52c3
SHA1:	2e6b245c95dcbe814ca6d5a2bf6bff90e0d06b6d
SHA256:	d496b895b3fd172325ffc99764043fd07e3275eaa29ef1b5adf3e86a7e173c21
SHA512:	225e4ec58b132ef264bce9adff18a72bbebf8b9d7d02869f1146c07ad3d45b17b83f177de34a4482da63a4767f7a963496be5e806a9536a020436359fdc6a76b
SSDEEP:	1536:ZhdbdxE4PKOagY8eObqLWKxUslZsqjmF+wVOz+sXcfW7k:hbdxE4COagZeBCujIqjmEwVOz+ucfW7k
TLSH:	F8833C02E743C6B3CC430BB2069BAE665931BDAE1E2A9F49F31D7DF49B128C47112B55
File Content Preview:	.ELF....................h...4...`.......4. ...(..............................................p...p.......i..........Q.td............................U..S.......w....h....s...[]...$.............U......=.s...t..1....$p.....$p......u........t...$.f..........s

Network Behavior

Download Network PCAP: filtered – full

UDP Packets

Timestamp	Source Port	Dest Port	Source IP	Dest IP
Mar 9, 2025 18:17:24.414341927 CET	45745	53	192.168.2.13	1.1.1.1
Mar 9, 2025 18:17:24.414341927 CET	46154	53	192.168.2.13	1.1.1.1
Mar 9, 2025 18:17:24.421547890 CET	53	45745	1.1.1.1	192.168.2.13
Mar 9, 2025 18:17:24.422023058 CET	53	46154	1.1.1.1	192.168.2.13

DNS Queries

Timestamp	Source IP	Dest IP	Trans ID	OP Code	Name	Type	Class	DNS over HTTPS
Mar 9, 2025 18:17:24.414341927 CET	192.168.2.13	1.1.1.1	0xea13	Standard query (0)	daisy.ubuntu.com	28	IN (0x0001)	false
Mar 9, 2025 18:17:24.414341927 CET	192.168.2.13	1.1.1.1	0xaffd	Standard query (0)	daisy.ubuntu.com	A (IP address)	IN (0x0001)	false

DNS Answers

Timestamp	Source IP	Dest IP	Trans ID	Reply Code	Name	CName	Address	Type	Class	DNS over HTTPS
Mar 9, 2025 18:17:24.422023058 CET	1.1.1.1	192.168.2.13	0xaffd	No error (0)	daisy.ubuntu.com		162.213.35.25	A (IP address)	IN (0x0001)	false
Mar 9, 2025 18:17:24.422023058 CET	1.1.1.1	192.168.2.13	0xaffd	No error (0)	daisy.ubuntu.com		162.213.35.24	A (IP address)	IN (0x0001)	false

System Behavior

Analysis Process: x-3.2-.Sakura.elf PID: 5472, Parent PID: 5390

General

Start time (UTC):	17:17:22
Start date (UTC):	09/03/2025
Path:	/tmp/x-3.2-.Sakura.elf
Arguments:	/tmp/x-3.2-.Sakura.elf
File size:	85208 bytes
MD5 hash:	5facc88ccf81fbb0b6e7172a766f52c3

Description:	Adversaries may obfuscate command and control traffic to make it more difficult to detect. Command and control (C2) communications are hidden (but not necessarily encrypted) in an attempt to make the content more difficult to discover or decipher and to make the communication less conspicuous and hide commands from being seen. This encompasses many methods, such as adding junk data to protocol traffic, using steganography, or impersonating legitimate protocols.
Tactics:	Command and Control
Data Sources:	Network Traffic: Network Traffic Content
Platforms:	Linux, macOS, Windows
Url:	Open detailed description by Mitre

Description:	Adversaries may use an OSI non-application layer protocol for communication between host and C2 server or among infected hosts within a network. The list of possible protocols is extensive.Specific examples include use of network layer protocols, such as the Internet Control Message Protocol (ICMP), transport layer protocols, such as the User Datagram Protocol (UDP), session layer protocols, such as Socket Secure (SOCKS), as well as redirected/tunneled protocols, such as Serial over LAN (SOL).
Tactics:	Command and Control
Data Sources:	Network Traffic: Network Traffic Content, Network Traffic: Network Traffic Flow
Platforms:	Linux, macOS, Network, Windows
Url:	Open detailed description by Mitre

Description:	Adversaries may communicate using OSI application layer protocols to avoid detection/network filtering by blending in with existing traffic. Commands to the remote system, and often the results of those commands, will be embedded within the protocol traffic between the client and server.
Tactics:	Command and Control
Data Sources:	Network Traffic: Network Traffic Content, Network Traffic: Network Traffic Flow
Platforms:	Linux, macOS, Windows
Url:	Open detailed description by Mitre

Behavior Section

Behavior Chronological

Disassembly

Uncategorized

Graph

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Warning!

Linux Analysis Report x-3.2-.Sakura.elf

Overview

General Information

Detection

Signatures

Classification

General Information

Runtime Messages

Process Tree

Malware Threat Intel

Yara Signatures

Initial Sample

Memory Dumps

Suricata Signatures

Joe Sandbox Signatures

AV Detection

Networking

System Summary

Stealing of Sensitive Information

Remote Access Functionality

Mitre Att&ck Matrix

Malware Configuration

Threatname: Gafgyt

Behavior Graph

Antivirus, Machine Learning and Genetic Malware Detection

Initial Sample

Dropped Files

Domains

URLs

Domains and IPs

Contacted Domains

Contacted URLs

World Map of Contacted IPs

Joe Sandbox View / Context

IPs

Domains

ASNs

JA3 Fingerprints

Dropped Files

Created / dropped Files

Static File Info

General

Network Behavior

UDP Packets

DNS Queries

DNS Answers

System Behavior

Analysis Process: x-3.2-.Sakura.elf PID: 5472, Parent PID: 5390

General

Linux Analysis Report
x-3.2-.Sakura.elf