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Linux Analysis Report
Kloki.arm6.elf

Overview

General Information

Sample name:	Kloki.arm6.elf
Analysis ID:	1586164
MD5:	2ec98ed3d1d54c940c988cf29893289c
SHA1:	6b3e76a339f58f8f217a62ea5d925300467bccb1
SHA256:	954b58091fd10e8b40909cf411f1e203fed9f7fce39764facf29c2beb44add30
Tags:	elfuser-abuse_ch
Infos:

Detection

Score:	48
Range:	0 - 100
Whitelisted:	false

Signatures

Multi AV Scanner detection for submitted file

ELF contains segments with high entropy indicating compressed/encrypted content

Sample contains only a LOAD segment without any section mappings

Tries to connect to HTTP servers, but all servers are down (expired dropper behavior)

Uses the "uname" system call to query kernel version information (possible evasion)

Classification

General Information

Joe Sandbox version:	41.0.0 Charoite
Analysis ID:	1586164
Start date and time:	2025-01-08 19:42:08 +01:00
Joe Sandbox product:	CloudBasic
Overall analysis duration:	0h 4m 27s
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:	Kloki.arm6.elf
Detection:	MAL
Classification:	mal48.linELF@0/0@0/0

Warnings

VT rate limit hit for: Kloki.arm6.elf

Runtime Messages

Command:	/tmp/Kloki.arm6.elf
PID:	6236
Exit Code:	139
Exit Code Info:	SIGSEGV (11) Segmentation fault invalid memory reference
Killed:	False
Standard Output:
Standard Error:	qemu: uncaught target signal 11 (Segmentation fault) - core dumped

Process Tree

system is lnxubuntu20

Kloki.arm6.elf (PID: 6236, Parent: 6152, MD5: 5ebfcae4fe2471fcc5695c2394773ff1) Arguments: /tmp/Kloki.arm6.elf

cleanup

Yara Signatures

⊘No yara matches

Suricata Signatures

⊘No Suricata rule has matched

Joe Sandbox Signatures

Click to jump to signature section

Show All Signature Results

AV Detection

Multi AV Scanner detection for submitted file

Source: Kloki.arm6.elf

ReversingLabs: Detection: 18%

Source: global traffic	TCP traffic: 192.168.2.23:43928 -> 91.189.91.42:443
Source: global traffic	TCP traffic: 192.168.2.23:42836 -> 91.189.91.43:443
Source: global traffic	TCP traffic: 192.168.2.23:42516 -> 109.202.202.202:80

Source: unknown	TCP traffic detected without corresponding DNS query: 91.189.91.42
Source: unknown	TCP traffic detected without corresponding DNS query: 91.189.91.43
Source: unknown	TCP traffic detected without corresponding DNS query: 109.202.202.202
Source: unknown	TCP traffic detected without corresponding DNS query: 91.189.91.42
Source: unknown	TCP traffic detected without corresponding DNS query: 91.189.91.43
Source: unknown	TCP traffic detected without corresponding DNS query: 109.202.202.202
Source: unknown	TCP traffic detected without corresponding DNS query: 91.189.91.42

Source: unknown	Network traffic detected: HTTP traffic on port 43928 -> 443
Source: unknown	Network traffic detected: HTTP traffic on port 42836 -> 443

Source: LOAD without section mappings

Program segment: 0x8000

Source: classification engine

Classification label: mal48.linELF@0/0@0/0

Source: Kloki.arm6.elf	Submission file: segment LOAD with 7.8856 entropy (max. 8.0)
Source: Kloki.arm6.elf	Submission file: segment LOAD with 7.9629 entropy (max. 8.0)

Source: /tmp/Kloki.arm6.elf (PID: 6236)

Queries kernel information via 'uname':

Jump to behavior

Source: Kloki.arm6.elf, 6236.1.0000565183252000.0000565183380000.rw-.sdmp	Binary or memory string: QV!/etc/qemu-binfmt/arm
Source: Kloki.arm6.elf, 6236.1.0000565183252000.0000565183380000.rw-.sdmp	Binary or memory string: /etc/qemu-binfmt/arm
Source: Kloki.arm6.elf, 6236.1.00007ffc1e3e2000.00007ffc1e403000.rw-.sdmp	Binary or memory string: /usr/bin/qemu-arm
Source: Kloki.arm6.elf, 6236.1.00007ffc1e3e2000.00007ffc1e403000.rw-.sdmp	Binary or memory string: zx86_64/usr/bin/qemu-arm/tmp/Kloki.arm6.elfSUDO_USER=saturninoPATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/snap/binDISPLAY=:1.0XAUTHORITY=/run/user/1000/gdm/XauthoritySUDO_UID=1000TERM=xterm-256colorCOLORTERM=truecolorLOGNAME=rootUSER=rootLANG=en_US.UTF-8SUDO_COMMAND=/bin/bashHOME=/rootMAIL=/var/mail/rootSUDO_GID=1000SHELL=/bin/bash/tmp/Kloki.arm6.elf
Source: Kloki.arm6.elf, 6236.1.00007ffc1e3e2000.00007ffc1e403000.rw-.sdmp	Binary or memory string: qemu: uncaught target signal 11 (Segmentation fault) - core dumped

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	1 Obfuscated Files or Information	OS Credential Dumping	11 Security Software Discovery	Remote Services	Data from Local System	1 Encrypted Channel	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 Application Layer Protocol	Exfiltration Over Bluetooth	Network Denial of Service

Malware Configuration

⊘No configs have been found

Behavior Graph

Hide Legend

Legend:

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

Screenshots

Thumbnails

This section contains all screenshots as thumbnails, including those not shown in the slideshow.

Antivirus, Machine Learning and Genetic Malware Detection

Initial Sample

Source	Detection	Scanner	Label	Link
Kloki.arm6.elf	18%	ReversingLabs	Linux.Backdoor.Mirai

Dropped Files

⊘No Antivirus matches

Domains

⊘No Antivirus matches

URLs

⊘No Antivirus matches

Domains and IPs

Contacted Domains

⊘No contacted domains info

World Map of Contacted IPs

No. of IPs < 25%
25% < No. of IPs < 50%
50% < No. of IPs < 75%
75% < No. of IPs

Public IPs

IP	Domain	Country	ASN	ASN Name	Malicious
109.202.202.202	unknown	Switzerland	13030	INIT7CH	false
91.189.91.43	unknown	United Kingdom	41231	CANONICAL-ASGB	false
91.189.91.42	unknown	United Kingdom	41231	CANONICAL-ASGB	false

Joe Sandbox View / Context

IPs

Match	Associated Sample Name / URL	SHA 256	Detection	Threat Name	Link	Context
109.202.202.202	kpLwzBouH4.elf	Get hash	malicious	Unknown	Browse	ch.archive.ubuntu.com/ubuntu/pool/main/f/firefox/firefox_92.0%2bbuild3-0ubuntu0.20.04.1_amd64.deb
91.189.91.43	dlr.mips.elf	Get hash	malicious	Unknown	Browse
	earm6.elf	Get hash	malicious	Mirai	Browse
	2.elf	Get hash	malicious	Unknown	Browse
	dlr.arm7.elf	Get hash	malicious	Unknown	Browse
	main_x86.elf	Get hash	malicious	Mirai	Browse
	m5.elf	Get hash	malicious	Unknown	Browse
	uYtea.x86.elf	Get hash	malicious	Unknown	Browse
	uYtea.mpsl.elf	Get hash	malicious	Unknown	Browse
	uYtea.x86_64.elf	Get hash	malicious	Unknown	Browse
	main_x86_64.elf	Get hash	malicious	Mirai	Browse
91.189.91.42	dlr.mips.elf	Get hash	malicious	Unknown	Browse
	earm6.elf	Get hash	malicious	Mirai	Browse
	2.elf	Get hash	malicious	Unknown	Browse
	dlr.arm7.elf	Get hash	malicious	Unknown	Browse
	main_x86.elf	Get hash	malicious	Mirai	Browse
	m5.elf	Get hash	malicious	Unknown	Browse
	uYtea.x86.elf	Get hash	malicious	Unknown	Browse
	uYtea.mpsl.elf	Get hash	malicious	Unknown	Browse
	uYtea.x86_64.elf	Get hash	malicious	Unknown	Browse
	main_x86_64.elf	Get hash	malicious	Mirai	Browse

Domains

⊘No context

ASNs

Match	Associated Sample Name / URL	SHA 256	Detection	Threat Name	Link	Context
CANONICAL-ASGB	dlr.mips.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	earm6.elf	Get hash	malicious	Mirai	Browse	91.189.91.42
	2.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	dlr.arm7.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	main_x86.elf	Get hash	malicious	Mirai	Browse	91.189.91.42
	m5.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	uYtea.sh4.elf	Get hash	malicious	Unknown	Browse	185.125.190.26
	uYtea.x86.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	uYtea.arc.elf	Get hash	malicious	Mirai	Browse	185.125.190.26
	uYtea.mpsl.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
CANONICAL-ASGB	dlr.mips.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	earm6.elf	Get hash	malicious	Mirai	Browse	91.189.91.42
	2.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	dlr.arm7.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	main_x86.elf	Get hash	malicious	Mirai	Browse	91.189.91.42
	m5.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	uYtea.sh4.elf	Get hash	malicious	Unknown	Browse	185.125.190.26
	uYtea.x86.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	uYtea.arc.elf	Get hash	malicious	Mirai	Browse	185.125.190.26
	uYtea.mpsl.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
INIT7CH	dlr.mips.elf	Get hash	malicious	Unknown	Browse	109.202.202.202
	earm6.elf	Get hash	malicious	Mirai	Browse	109.202.202.202
	2.elf	Get hash	malicious	Unknown	Browse	109.202.202.202
	dlr.arm7.elf	Get hash	malicious	Unknown	Browse	109.202.202.202
	main_x86.elf	Get hash	malicious	Mirai	Browse	109.202.202.202
	m5.elf	Get hash	malicious	Unknown	Browse	109.202.202.202
	uYtea.x86.elf	Get hash	malicious	Unknown	Browse	109.202.202.202
	uYtea.mpsl.elf	Get hash	malicious	Unknown	Browse	109.202.202.202
	uYtea.x86_64.elf	Get hash	malicious	Unknown	Browse	109.202.202.202
	main_x86_64.elf	Get hash	malicious	Mirai	Browse	109.202.202.202

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, ARM, EABI4 version 1 (GNU/Linux), statically linked, no section header
Entropy (8bit):	7.960532255599611
TrID:	ELF Executable and Linkable format (generic) (4004/1) 100.00%
File name:	Kloki.arm6.elf
File size:	36'564 bytes
MD5:	2ec98ed3d1d54c940c988cf29893289c
SHA1:	6b3e76a339f58f8f217a62ea5d925300467bccb1
SHA256:	954b58091fd10e8b40909cf411f1e203fed9f7fce39764facf29c2beb44add30
SHA512:	d4dc72d21a50d4c09bb593fb9d5cb70531fb9df29a26f2313c5798be2fa38ffe168be142a22a8ebdf3e537bd2079fb73901fb7fea4f2bee6cd7c42807a0b6510
SSDEEP:	768:1mGvi0+sE0y+Hemi1ruZQOkPhUVeTuY0G0Iqq3UoAf:jq0+30y+HeVrEQThUwTu3qA
TLSH:	16F2E18720C1D297C6B60433F81DE202A29A56F6E0F634536F449AE8F5D768739FD643
File Content Preview:	.ELF..............(......{..4...........4. ...(.........................0\..........................................Q.td..............................t.sfga.........)...)......S..........?.E.h;....#..$..1)........[..c]d.g@0.?..........m-...'.g..){.rchx;g.

Static ELF Info

ELF header
Class:	ELF32
Data:	2's complement, little endian
Version:	1 (current)
Machine:	ARM
Version Number:	0x1
Type:	EXEC (Executable file)
OS/ABI:	UNIX - Linux
ABI Version:	0
Entry Point Address:	0x37bbc
Flags:	0x4000002
ELF Header Size:	52
Program Header Offset:	52
Program Header Size:	32
Number of Program Headers:	3
Section Header Offset:	0
Section Header Size:	40
Number of Section Headers:	0
Header String Table Index:	0

Program Segments

Type	Offset	Virtual Address	Physical Address	File Size	Memory Size	Entropy	Flags	Flags Description	Align
LOAD	0x0	0x8000	0x8000	0x1000	0x25c30	7.8856	0x6	RW	0x8000
LOAD	0x0	0x30000	0x30000	0x8dab	0x8dab	7.9629	0x5	R E	0x8000
GNU_STACK	0x0	0x0	0x0	0x0	0x0	0.0000	0x7	RWE	0x4

Network Behavior

Network Port Distribution

TCP Packets

Timestamp	Source Port	Dest Port	Source IP	Dest IP
Jan 8, 2025 19:42:49.276858091 CET	43928	443	192.168.2.23	91.189.91.42
Jan 8, 2025 19:42:54.652118921 CET	42836	443	192.168.2.23	91.189.91.43
Jan 8, 2025 19:42:56.187963009 CET	42516	80	192.168.2.23	109.202.202.202
Jan 8, 2025 19:43:11.033818960 CET	43928	443	192.168.2.23	91.189.91.42
Jan 8, 2025 19:43:21.272413015 CET	42836	443	192.168.2.23	91.189.91.43
Jan 8, 2025 19:43:27.415550947 CET	42516	80	192.168.2.23	109.202.202.202
Jan 8, 2025 19:43:51.988281012 CET	43928	443	192.168.2.23	91.189.91.42

System Behavior

Analysis Process: Kloki.arm6.elf PID: 6236, Parent PID: 6152

General

Start time (UTC):	18:42:45
Start date (UTC):	08/01/2025
Path:	/tmp/Kloki.arm6.elf
Arguments:	/tmp/Kloki.arm6.elf
File size:	4956856 bytes
MD5 hash:	5ebfcae4fe2471fcc5695c2394773ff1

Description:	Adversaries may attempt to make an executable or file difficult to discover or analyze by encrypting, encoding, or otherwise obfuscating its contents on the system or in transit. This is common behavior that can be used across different platforms and the network to evade defenses.
Tactics:	Defense Evasion
Data Sources:	Command: Command Execution, File: File Creation, File: File Metadata, Module: Module Load, Process: OS API Execution, Process: Process Creation, Script: Script Execution, WMI: WMI Creation, Windows Registry: Windows Registry Key Creation
Platforms:	Linux, macOS, Windows
Url:	Open detailed description by Mitre

Description:	Adversaries may attempt to get a listing of security software, configurations, defensive tools, and sensors that are installed on a system or in a cloud environment. This may include things such as firewall rules and anti-virus. Adversaries may use the information from Security Software Discovery during automated discovery to shape follow-on behaviors, including whether or not the adversary fully infects the target and/or attempts specific actions.
Tactics:	Discovery
Data Sources:	Command: Command Execution, Firewall: Firewall Enumeration, Firewall: Firewall Metadata, Process: OS API Execution, Process: Process Creation
Platforms:	Azure AD, Google Workspace, IaaS, Linux, macOS, Office 365, SaaS, Windows
Url:	Open detailed description by Mitre

Description:	Adversaries may employ a known encryption algorithm to conceal command and control traffic rather than relying on any inherent protections provided by a communication protocol. Despite the use of a secure algorithm, these implementations may be vulnerable to reverse engineering if secret keys are encoded and/or generated within malware samples/configuration files.
Tactics:	Command and Control
Data Sources:	Network Traffic: Network Traffic Content
Platforms:	Linux, macOS, 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 Kloki.arm6.elf

Overview

General Information

Detection

Signatures

Classification

General Information

Warnings

Runtime Messages

Process Tree

Yara Signatures

Suricata Signatures

Joe Sandbox Signatures

AV Detection

Networking

System Summary

Hooking and other Techniques for Hiding and Protection

Malware Analysis System Evasion

Mitre Att&ck Matrix

Malware Configuration

Behavior Graph

Screenshots

Thumbnails

Antivirus, Machine Learning and Genetic Malware Detection

Initial Sample

Dropped Files

Domains

URLs

Domains and IPs

Contacted Domains

World Map of Contacted IPs

Public IPs

Joe Sandbox View / Context

IPs

Domains

ASNs

JA3 Fingerprints

Dropped Files

Created / dropped Files

Static File Info

General

Static ELF Info

ELF header

Program Segments

Network Behavior

Network Port Distribution

TCP Packets

System Behavior

Analysis Process: Kloki.arm6.elf PID: 6236, Parent PID: 6152

General

Chronological Activities

Linux Analysis Report
Kloki.arm6.elf