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Linux Analysis Report
bin.sh.elf

Overview

General Information

Sample name:	bin.sh.elf
Analysis ID:	1587353
MD5:	99bcbc17132669c6debd410ba2d975c9
SHA1:	5dcfd815380db30a13532e63dd72b866aa5e5e4e
SHA256:	4123fc1e9ba7c080893052813a558fe80f113475eb1f5ca5169d933a148164ea
Tags:	elfuser-abuse_ch
Infos:

Detection

Score:	56
Range:	0 - 100
Whitelisted:	false

Signatures

Malicious sample detected (through community Yara rule)

Multi AV Scanner detection for submitted file

ELF contains segments with high entropy indicating compressed/encrypted content

Executes the "rm" command used to delete files or directories

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)

Yara signature match

Classification

General Information

Joe Sandbox version:	42.0.0 Malachite
Analysis ID:	1587353
Start date and time:	2025-01-10 09:07:04 +01:00
Joe Sandbox product:	CloudBasic
Overall analysis duration:	0h 4m 35s
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:	bin.sh.elf
Detection:	MAL
Classification:	mal56.linELF@0/0@0/0

Runtime Messages

Command:	/tmp/bin.sh.elf
PID:	6208
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

dash New Fork (PID: 6198, Parent: 4331)

rm (PID: 6198, Parent: 4331, MD5: aa2b5496fdbfd88e38791ab81f90b95b) Arguments: rm -f /tmp/tmp.KIbTrkKzjN /tmp/tmp.oWMEBeKuBY /tmp/tmp.R3PsWtaalK

dash New Fork (PID: 6199, Parent: 4331)

rm (PID: 6199, Parent: 4331, MD5: aa2b5496fdbfd88e38791ab81f90b95b) Arguments: rm -f /tmp/tmp.KIbTrkKzjN /tmp/tmp.oWMEBeKuBY /tmp/tmp.R3PsWtaalK

bin.sh.elf (PID: 6208, Parent: 6124, MD5: 0083f1f0e77be34ad27f849842bbb00c) Arguments: /tmp/bin.sh.elf

cleanup

Yara Signatures

Initial Sample

Source	Rule	Description	Author	Strings
bin.sh.elf	Linux_Packer_Patched_UPX_62e11c64	unknown	unknown	0x78:$a: 55 50 58 21 0A 58 0D 89 00 00 00 00 00 00 00 00 00 00 00 00

Memory Dumps

Source	Rule	Description	Author	Strings
6208.1.00007f3418400000.00007f3418421000.r-x.sdmp	Linux_Packer_Patched_UPX_62e11c64	unknown	unknown	0x78:$a: 55 50 58 21 0A 58 0D 89 00 00 00 00 00 00 00 00 00 00 00 00

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: bin.sh.elf

ReversingLabs: Detection: 26%

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

System Summary

Malicious sample detected (through community Yara rule)

Source: bin.sh.elf, type: SAMPLE	Matched rule: Linux_Packer_Patched_UPX_62e11c64 Author: unknown
Source: 6208.1.00007f3418400000.00007f3418421000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Packer_Patched_UPX_62e11c64 Author: unknown

Source: LOAD without section mappings

Program segment: 0x400000

Source: bin.sh.elf, type: SAMPLE	Matched rule: Linux_Packer_Patched_UPX_62e11c64 reference_sample = 02f81a1e1edcb9032a1d7256a002b11e1e864b2e9989f5d24ea1c9b507895669, os = linux, severity = x86, creation_date = 2021-06-08, scan_context = file, reference = https://cujo.com/upx-anti-unpacking-techniques-in-iot-malware/, license = Elastic License v2, threat_name = Linux.Packer.Patched_UPX, fingerprint = 3297b5c63e70c557e71b739428b453039b142e1e04c2ab15eea4627d023b686d, id = 62e11c64-fc7d-4a0a-9d72-ad53ec3987ff, last_modified = 2021-07-28
Source: 6208.1.00007f3418400000.00007f3418421000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Packer_Patched_UPX_62e11c64 reference_sample = 02f81a1e1edcb9032a1d7256a002b11e1e864b2e9989f5d24ea1c9b507895669, os = linux, severity = x86, creation_date = 2021-06-08, scan_context = file, reference = https://cujo.com/upx-anti-unpacking-techniques-in-iot-malware/, license = Elastic License v2, threat_name = Linux.Packer.Patched_UPX, fingerprint = 3297b5c63e70c557e71b739428b453039b142e1e04c2ab15eea4627d023b686d, id = 62e11c64-fc7d-4a0a-9d72-ad53ec3987ff, last_modified = 2021-07-28

Source: classification engine

Classification label: mal56.linELF@0/0@0/0

Source: /usr/bin/dash (PID: 6198)	Rm executable: /usr/bin/rm -> rm -f /tmp/tmp.KIbTrkKzjN /tmp/tmp.oWMEBeKuBY /tmp/tmp.R3PsWtaalK			Jump to behavior
Source: /usr/bin/dash (PID: 6199)	Rm executable: /usr/bin/rm -> rm -f /tmp/tmp.KIbTrkKzjN /tmp/tmp.oWMEBeKuBY /tmp/tmp.R3PsWtaalK			Jump to behavior

Source: bin.sh.elf

Submission file: segment LOAD with 7.7907 entropy (max. 8.0)

Source: /tmp/bin.sh.elf (PID: 6208)

Queries kernel information via 'uname':

Jump to behavior

Source: bin.sh.elf, 6208.1.000056405c9ac000.000056405ca33000.rw-.sdmp	Binary or memory string: \@V!/etc/qemu-binfmt/mips
Source: bin.sh.elf, 6208.1.000056405c9ac000.000056405ca33000.rw-.sdmp	Binary or memory string: /etc/qemu-binfmt/mips
Source: bin.sh.elf, 6208.1.00007ffdaa495000.00007ffdaa4b6000.rw-.sdmp	Binary or memory string: /usr/bin/qemu-mips
Source: bin.sh.elf, 6208.1.00007ffdaa495000.00007ffdaa4b6000.rw-.sdmp	Binary or memory string: Ox86_64/usr/bin/qemu-mips/tmp/bin.sh.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/bin.sh.elf
Source: bin.sh.elf, 6208.1.00007ffdaa495000.00007ffdaa4b6000.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	1 File Deletion	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

Antivirus, Machine Learning and Genetic Malware Detection

Initial Sample

Source	Detection	Scanner	Label	Link
bin.sh.elf	26%	ReversingLabs	Linux.Trojan.Mozi

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	12.elf	Get hash	malicious	Unknown	Browse
	Aqua.ppc.elf	Get hash	malicious	Unknown	Browse
	2.elf	Get hash	malicious	Unknown	Browse
	ssa.elf	Get hash	malicious	Unknown	Browse
	main_arm.elf	Get hash	malicious	Mirai	Browse
	arm7.elf	Get hash	malicious	Mirai	Browse
	12.elf	Get hash	malicious	Unknown	Browse
	2.elf	Get hash	malicious	Unknown	Browse
	fenty.arm7.elf	Get hash	malicious	Mirai	Browse
	armv4eb.elf	Get hash	malicious	Unknown	Browse
91.189.91.42	12.elf	Get hash	malicious	Unknown	Browse
	Aqua.ppc.elf	Get hash	malicious	Unknown	Browse
	2.elf	Get hash	malicious	Unknown	Browse
	ssa.elf	Get hash	malicious	Unknown	Browse
	main_arm.elf	Get hash	malicious	Mirai	Browse
	arm7.elf	Get hash	malicious	Mirai	Browse
	12.elf	Get hash	malicious	Unknown	Browse
	2.elf	Get hash	malicious	Unknown	Browse
	fenty.arm7.elf	Get hash	malicious	Mirai	Browse
	armv4eb.elf	Get hash	malicious	Unknown	Browse

Domains

⊘No context

ASNs

Match	Associated Sample Name / URL	SHA 256	Detection	Threat Name	Link	Context
CANONICAL-ASGB	12.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	Aqua.ppc.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	2.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	ssa.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	main_arm.elf	Get hash	malicious	Mirai	Browse	91.189.91.42
	arm7.elf	Get hash	malicious	Mirai	Browse	91.189.91.42
	main_sh4.elf	Get hash	malicious	Mirai	Browse	185.125.190.26
	12.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	2.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	fenty.arm4.elf	Get hash	malicious	Mirai	Browse	185.125.190.26
CANONICAL-ASGB	12.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	Aqua.ppc.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	2.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	ssa.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	main_arm.elf	Get hash	malicious	Mirai	Browse	91.189.91.42
	arm7.elf	Get hash	malicious	Mirai	Browse	91.189.91.42
	main_sh4.elf	Get hash	malicious	Mirai	Browse	185.125.190.26
	12.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	2.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	fenty.arm4.elf	Get hash	malicious	Mirai	Browse	185.125.190.26
INIT7CH	12.elf	Get hash	malicious	Unknown	Browse	109.202.202.202
	Aqua.ppc.elf	Get hash	malicious	Unknown	Browse	109.202.202.202
	2.elf	Get hash	malicious	Unknown	Browse	109.202.202.202
	ssa.elf	Get hash	malicious	Unknown	Browse	109.202.202.202
	main_arm.elf	Get hash	malicious	Mirai	Browse	109.202.202.202
	arm7.elf	Get hash	malicious	Mirai	Browse	109.202.202.202
	12.elf	Get hash	malicious	Unknown	Browse	109.202.202.202
	2.elf	Get hash	malicious	Unknown	Browse	109.202.202.202
	fenty.arm7.elf	Get hash	malicious	Mirai	Browse	109.202.202.202
	armv4eb.elf	Get hash	malicious	Unknown	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 MSB executable, MIPS, MIPS-I version 1 (SYSV), statically linked, no section header
Entropy (8bit):	7.79067869163959
TrID:	ELF Executable and Linkable format (Linux) (4029/14) 50.16% ELF Executable and Linkable format (generic) (4004/1) 49.84%
File name:	bin.sh.elf
File size:	68'096 bytes
MD5:	99bcbc17132669c6debd410ba2d975c9
SHA1:	5dcfd815380db30a13532e63dd72b866aa5e5e4e
SHA256:	4123fc1e9ba7c080893052813a558fe80f113475eb1f5ca5169d933a148164ea
SHA512:	57b5ffabb50ef3bb9eef92d6d3d90c536ab97c601e14ffc3748d8a68249ccd3c444beb90133dbbb73c7dfc4ea0155d53844788f6fdfda49519c8c7700b8fa6ff
SSDEEP:	1536:2nx7pSTlZ3FtM/KFz+EhPVyw77e6tZ9TErGwHQsTKfj0WY2gfe:2glZ3FtCKXhkmHtZ9TEKzjfj/3
TLSH:	4F6301638E7CB3F9C9B1F4F2A684565D415667CCC6496720331B78668F083AE0D8F396
File Content Preview:	.ELF.....................B.x...4.........4. ...(.............@...@...........................C...C....................UPX!.X.....................]....\|.$..ELF..........@.`....4...p... ...(......<...@......[v......H...`.t/._...dt.Q.....].M........P......

Static ELF Info

ELF header
Class:	ELF32
Data:	2's complement, big endian
Version:	1 (current)
Machine:	MIPS R3000
Version Number:	0x1
Type:	EXEC (Executable file)
OS/ABI:	UNIX - System V
ABI Version:	0
Entry Point Address:	0x420578
Flags:	0x1007
ELF Header Size:	52
Program Header Offset:	52
Program Header Size:	32
Number of Program Headers:	2
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	Prog Interpreter	Section Mappings
LOAD	0x0	0x400000	0x400000	0x20fc2	0x20fc2	7.7907	0x5	R E	0x10000
LOAD	0x0	0x430000	0x430000	0x0	0x91f18	0.0000	0x6	RW	0x10000

Network Behavior

Network Port Distribution

TCP Packets

Timestamp	Source Port	Dest Port	Source IP	Dest IP
Jan 10, 2025 09:07:47.597261906 CET	43928	443	192.168.2.23	91.189.91.42
Jan 10, 2025 09:07:52.972932100 CET	42836	443	192.168.2.23	91.189.91.43
Jan 10, 2025 09:07:54.508399010 CET	42516	80	192.168.2.23	109.202.202.202
Jan 10, 2025 09:08:08.074594975 CET	43928	443	192.168.2.23	91.189.91.42
Jan 10, 2025 09:08:20.361114979 CET	42836	443	192.168.2.23	91.189.91.43
Jan 10, 2025 09:08:24.456379890 CET	42516	80	192.168.2.23	109.202.202.202
Jan 10, 2025 09:08:49.029196024 CET	43928	443	192.168.2.23	91.189.91.42

System Behavior

Analysis Process: dash PID: 6198, Parent PID: 4331

General

Start time (UTC):	08:07:39
Start date (UTC):	10/01/2025
Path:	/usr/bin/dash
Arguments:	-
File size:	129816 bytes
MD5 hash:	1e6b1c887c59a315edb7eb9a315fc84c

Chronological Activities

Analysis Process: rm PID: 6198, Parent PID: 4331

General

Start time (UTC):	08:07:39
Start date (UTC):	10/01/2025
Path:	/usr/bin/rm
Arguments:	rm -f /tmp/tmp.KIbTrkKzjN /tmp/tmp.oWMEBeKuBY /tmp/tmp.R3PsWtaalK
File size:	72056 bytes
MD5 hash:	aa2b5496fdbfd88e38791ab81f90b95b

Chronological Activities

Analysis Process: dash PID: 6199, Parent PID: 4331

General

Start time (UTC):	08:07:39
Start date (UTC):	10/01/2025
Path:	/usr/bin/dash
Arguments:	-
File size:	129816 bytes
MD5 hash:	1e6b1c887c59a315edb7eb9a315fc84c

Chronological Activities

Analysis Process: rm PID: 6199, Parent PID: 4331

General

Start time (UTC):	08:07:39
Start date (UTC):	10/01/2025
Path:	/usr/bin/rm
Arguments:	rm -f /tmp/tmp.KIbTrkKzjN /tmp/tmp.oWMEBeKuBY /tmp/tmp.R3PsWtaalK
File size:	72056 bytes
MD5 hash:	aa2b5496fdbfd88e38791ab81f90b95b

Chronological Activities

Analysis Process: bin.sh.elf PID: 6208, Parent PID: 6124

General

Start time (UTC):	08:07:47
Start date (UTC):	10/01/2025
Path:	/tmp/bin.sh.elf
Arguments:	/tmp/bin.sh.elf
File size:	5777432 bytes
MD5 hash:	0083f1f0e77be34ad27f849842bbb00c

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 delete files left behind by the actions of their intrusion activity. Malware, tools, or other non-native files dropped or created on a system by an adversary (ex: Ingress Tool Transfer ) may leave traces to indicate to what was done within a network and how. Removal of these files can occur during an intrusion, or as part of a post-intrusion process to minimize the adversary's footprint.
Tactics:	Defense Evasion
Data Sources:	Command: Command Execution, File: File Deletion
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 bin.sh.elf

Overview

General Information

Detection

Signatures

Classification

General Information

Runtime Messages

Process Tree

Yara Signatures

Initial Sample

Memory Dumps

Suricata Signatures

Joe Sandbox Signatures

AV Detection

Networking

System Summary

Persistence and Installation Behavior

Hooking and other Techniques for Hiding and Protection

Malware Analysis System Evasion

Mitre Att&ck Matrix

Malware Configuration

Behavior Graph

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: dash PID: 6198, Parent PID: 4331

General

Chronological Activities

Analysis Process: rm PID: 6198, Parent PID: 4331

General

Chronological Activities

Analysis Process: dash PID: 6199, Parent PID: 4331

General

Chronological Activities

Analysis Process: rm PID: 6199, Parent PID: 4331

General

Chronological Activities

Analysis Process: bin.sh.elf PID: 6208, Parent PID: 6124

General

Chronological Activities

Linux Analysis Report
bin.sh.elf