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Linux Analysis Report
gigab.i686.elf

Overview

General Information

Sample name:	gigab.i686.elf
Analysis ID:	1643831
MD5:	c1b336fecec48326beeb39edffbcf973
SHA1:	51cab587c8e541fc8a1b49b0ab94b2e75b7460ee
SHA256:	b8da6ab162d8415ed1b4654f71cb333d91236c4dfe5f65a6d6192de2d57917d7
Tags:	elfuser-abuse_ch
Infos:

Detection

Score:	48
Range:	0 - 100

Signatures

Malicious sample detected (through community Yara rule)

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

Yara signature match

Classification

General Information

Joe Sandbox version:	42.0.0 Malachite
Analysis ID:	1643831
Start date and time:	2025-03-20 07:37:33 +01:00
Joe Sandbox product:	CloudBasic
Overall analysis duration:	0h 4m 24s
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:	gigab.i686.elf
Detection:	MAL
Classification:	mal48.linELF@0/0@0/0

Runtime Messages

Command:	/tmp/gigab.i686.elf
PID:	5473
Exit Code:	139
Exit Code Info:	SIGSEGV (11) Segmentation fault invalid memory reference
Killed:	False
Standard Output:
Standard Error:

Process Tree

system is lnxubuntu20

dash New Fork (PID: 5537, Parent: 3635)

rm (PID: 5537, Parent: 3635, MD5: aa2b5496fdbfd88e38791ab81f90b95b) Arguments: rm -f /tmp/tmp.zgX6pUASmU /tmp/tmp.Xo3dZmrSLS /tmp/tmp.b15Bmvw870

dash New Fork (PID: 5538, Parent: 3635)

rm (PID: 5538, Parent: 3635, MD5: aa2b5496fdbfd88e38791ab81f90b95b) Arguments: rm -f /tmp/tmp.zgX6pUASmU /tmp/tmp.Xo3dZmrSLS /tmp/tmp.b15Bmvw870

cleanup

Yara Signatures

Initial Sample

Source	Rule	Description	Author	Strings
gigab.i686.elf	Linux_Trojan_Gafgyt_862c4e0e	unknown	unknown	0x1427:$a: 02 89 45 F8 8B 45 F8 C1 E8 10 85 C0 75 E6 8B 45 F8 F7 D0 0F

Joe Sandbox Signatures

• Networking
• System Summary
• Persistence and Installation Behavior

Click to jump to signature section

Show All Signature Results

Source: unknown	TCP traffic detected without corresponding DNS query: 34.243.160.129
Source: unknown	TCP traffic detected without corresponding DNS query: 185.125.190.26
Source: unknown	TCP traffic detected without corresponding DNS query: 54.247.62.1
Source: unknown	TCP traffic detected without corresponding DNS query: 54.247.62.1
Source: unknown	TCP traffic detected without corresponding DNS query: 54.247.62.1
Source: unknown	TCP traffic detected without corresponding DNS query: 185.125.190.26
Source: unknown	TCP traffic detected without corresponding DNS query: 54.247.62.1

Source: unknown	Network traffic detected: HTTP traffic on port 443 -> 43390
Source: unknown	Network traffic detected: HTTP traffic on port 43390 -> 443
Source: unknown	Network traffic detected: HTTP traffic on port 46540 -> 443
Source: unknown	Network traffic detected: HTTP traffic on port 42468 -> 443

System Summary

Malicious sample detected (through community Yara rule)

Source: gigab.i686.elf, type: SAMPLE

Matched rule: Linux_Trojan_Gafgyt_862c4e0e Author: unknown

Source: gigab.i686.elf, type: SAMPLE

Matched rule: Linux_Trojan_Gafgyt_862c4e0e reference_sample = 9526277255a8d632355bfe54d53154c9c54a4ab75e3ba24333c73ad0ed7cadb1, os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Gafgyt, fingerprint = 2a6b4f8d8fb4703ed26bdcfbbb5c539dc451c8b90649bee80015c164eae4c281, id = 862c4e0e-83a4-458b-8c00-f2f3cf0bf9db, last_modified = 2021-09-16

Source: classification engine

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

Source: /usr/bin/dash (PID: 5537)	Rm executable: /usr/bin/rm -> rm -f /tmp/tmp.zgX6pUASmU /tmp/tmp.Xo3dZmrSLS /tmp/tmp.b15Bmvw870			Jump to behavior
Source: /usr/bin/dash (PID: 5538)	Rm executable: /usr/bin/rm -> rm -f /tmp/tmp.zgX6pUASmU /tmp/tmp.Xo3dZmrSLS /tmp/tmp.b15Bmvw870			Jump to behavior

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 File Deletion	OS Credential Dumping	System Service 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

Antivirus, Machine Learning and Genetic Malware Detection

Initial Sample

Source	Detection	Scanner	Label	Link
gigab.i686.elf	6%	ReversingLabs

Dropped Files

⊘No Antivirus matches

Domains

⊘No Antivirus matches

URLs

⊘No Antivirus matches

Domains and IPs

Download Network PCAP: filtered – full

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
185.125.190.26	unknown	United Kingdom	41231	CANONICAL-ASGB	false
34.243.160.129	unknown	United States	16509	AMAZON-02US	false
54.247.62.1	unknown	United States	16509	AMAZON-02US	false

Joe Sandbox View / Context

IPs

Match	Associated Sample Name / URL	SHA 256	Detection	Threat Name	Link
185.125.190.26	na.elf	Get hash	malicious	Prometei	Browse
	.i.elf	Get hash	malicious	Unknown	Browse
	jkse.arm6.elf	Get hash	malicious	Unknown	Browse
	nklarm6.elf	Get hash	malicious	Unknown	Browse
	na.elf	Get hash	malicious	Prometei	Browse
	na.elf	Get hash	malicious	Prometei	Browse
	na.elf	Get hash	malicious	Prometei	Browse
	sync.mipsel.elf	Get hash	malicious	Unknown	Browse
	na.elf	Get hash	malicious	Prometei	Browse
	arm6.elf	Get hash	malicious	Unknown	Browse
34.243.160.129	na.elf	Get hash	malicious	Prometei	Browse
	na.elf	Get hash	malicious	Prometei	Browse
	na.elf	Get hash	malicious	Prometei	Browse
	hide.spc.elf	Get hash	malicious	Unknown	Browse
	na.elf	Get hash	malicious	Prometei	Browse
	arm7.nn.elf	Get hash	malicious	Mirai	Browse
	m-p.s-l.Sakura.elf	Get hash	malicious	Gafgyt, Mirai	Browse
	m68k.nn.elf	Get hash	malicious	Mirai, Okiru	Browse
	zbotx86.elf	Get hash	malicious	Tsunami	Browse
	na.elf	Get hash	malicious	Prometei	Browse
54.247.62.1	jkse.arm7.elf	Get hash	malicious	Mirai	Browse
	na.elf	Get hash	malicious	Prometei	Browse
	na.elf	Get hash	malicious	Prometei	Browse
	apep.arm.elf	Get hash	malicious	Unknown	Browse
	na.elf	Get hash	malicious	Prometei	Browse
	rrrdsl.elf	Get hash	malicious	Unknown	Browse
	na.elf	Get hash	malicious	Prometei	Browse
	powerpc.nn.elf	Get hash	malicious	Mirai	Browse
	na.elf	Get hash	malicious	Prometei	Browse
	m68k.elf	Get hash	malicious	Unknown	Browse

Domains

⊘No context

ASNs

Match	Associated Sample Name / URL	SHA 256	Detection	Threat Name	Link	Context
AMAZON-02US	sshd.elf	Get hash	malicious	Unknown	Browse	34.249.145.219
	na.elf	Get hash	malicious	Prometei	Browse	34.249.145.219
	na.elf	Get hash	malicious	Prometei	Browse	34.243.160.129
	FG_ShippingNotice_20250310_XDGF.exe	Get hash	malicious	FormBook	Browse	13.248.169.48
	miner.elf	Get hash	malicious	Unknown	Browse	34.249.145.219
	na.elf	Get hash	malicious	Prometei	Browse	34.249.145.219
	na.elf	Get hash	malicious	Prometei	Browse	54.171.230.55
	https://ezproxy.lakeheadu.ca/login?url=https://gamma.app/docs/Incoming-PDF-Document-wpeaqji1jmv0zug?mode=present#card-f9lsd6ekhyr749b	Get hash	malicious	Unknown	Browse	108.139.47.21
	Chevron Request details folder.exe	Get hash	malicious	FormBook	Browse	13.248.169.48
	na.elf	Get hash	malicious	Prometei	Browse	34.249.145.219
AMAZON-02US	sshd.elf	Get hash	malicious	Unknown	Browse	34.249.145.219
	na.elf	Get hash	malicious	Prometei	Browse	34.249.145.219
	na.elf	Get hash	malicious	Prometei	Browse	34.243.160.129
	FG_ShippingNotice_20250310_XDGF.exe	Get hash	malicious	FormBook	Browse	13.248.169.48
	miner.elf	Get hash	malicious	Unknown	Browse	34.249.145.219
	na.elf	Get hash	malicious	Prometei	Browse	34.249.145.219
	na.elf	Get hash	malicious	Prometei	Browse	54.171.230.55
	https://ezproxy.lakeheadu.ca/login?url=https://gamma.app/docs/Incoming-PDF-Document-wpeaqji1jmv0zug?mode=present#card-f9lsd6ekhyr749b	Get hash	malicious	Unknown	Browse	108.139.47.21
	Chevron Request details folder.exe	Get hash	malicious	FormBook	Browse	13.248.169.48
	na.elf	Get hash	malicious	Prometei	Browse	34.249.145.219
CANONICAL-ASGB	miner.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	sshd.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	miner.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	na.elf	Get hash	malicious	Prometei	Browse	91.189.91.42
	na.elf	Get hash	malicious	Prometei	Browse	185.125.190.26
	miner.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	na.elf	Get hash	malicious	Prometei	Browse	91.189.91.42
	na.elf	Get hash	malicious	Prometei	Browse	91.189.91.42
	na.elf	Get hash	malicious	Prometei	Browse	91.189.91.42
	na.elf	Get hash	malicious	Prometei	Browse	91.189.91.42

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, missing section headers at 68068
Entropy (8bit):	5.758087959491267
TrID:	ELF Executable and Linkable format (Linux) (4029/14) 50.16% ELF Executable and Linkable format (generic) (4004/1) 49.84%
File name:	gigab.i686.elf
File size:	12'768 bytes
MD5:	c1b336fecec48326beeb39edffbcf973
SHA1:	51cab587c8e541fc8a1b49b0ab94b2e75b7460ee
SHA256:	b8da6ab162d8415ed1b4654f71cb333d91236c4dfe5f65a6d6192de2d57917d7
SHA512:	5f7ab3b5d5d3104114bf0fbfb87a720893f68bbfa316f7732e5ab5c1edcfe73717260a406c0dc4333abbd691a06cc944ea240344279c779524fddd23185c3c9c
SSDEEP:	192:fu4TYHdvF4lEUEasyahIv6saBg3qfBf3Y1IlBgpsXFQT8R6wJdfkSV6CUjjGns29:fudi9D6Y6bBDfo1agpqWWfBV6uOR1s
TLSH:	93425264F207C0F2E9052B73408FB1AF6221B32DD4767E9EEB5A1C10E736C91A59476B
File Content Preview:	.ELF........................4...d.......4. ...(.....................t...t....................p...p.......y..............p...pv..pv..................Q.td............................U..S............h........[]...$.............U......=.x...t..1.....v......v.

Network Behavior

Download Network PCAP: filtered – full

TCP Packets

Timestamp	Source Port	Dest Port	Source IP	Dest IP
Mar 20, 2025 07:38:19.200400114 CET	42468	443	192.168.2.14	34.243.160.129
Mar 20, 2025 07:38:27.392128944 CET	46540	443	192.168.2.14	185.125.190.26
Mar 20, 2025 07:38:47.771946907 CET	43390	443	192.168.2.14	54.247.62.1
Mar 20, 2025 07:38:47.772041082 CET	443	43390	54.247.62.1	192.168.2.14
Mar 20, 2025 07:38:47.772182941 CET	43390	443	192.168.2.14	54.247.62.1
Mar 20, 2025 07:38:47.773673058 CET	43390	443	192.168.2.14	54.247.62.1
Mar 20, 2025 07:38:47.773706913 CET	443	43390	54.247.62.1	192.168.2.14
Mar 20, 2025 07:38:59.135325909 CET	46540	443	192.168.2.14	185.125.190.26
Mar 20, 2025 07:39:47.770894051 CET	43390	443	192.168.2.14	54.247.62.1
Mar 20, 2025 07:39:47.816337109 CET	443	43390	54.247.62.1	192.168.2.14
Mar 20, 2025 07:40:20.856375933 CET	443	43390	54.247.62.1	192.168.2.14

System Behavior

Analysis Process: dash PID: 5537, Parent PID: 3635

General

Start time (UTC):	06:39:46
Start date (UTC):	20/03/2025
Path:	/usr/bin/dash
Arguments:	-
File size:	129816 bytes
MD5 hash:	1e6b1c887c59a315edb7eb9a315fc84c

Process Activities

Process Overlayed (Exec)

Chronological Activities

Analysis Process: rm PID: 5537, Parent PID: 3635

General

Start time (UTC):	06:39:46
Start date (UTC):	20/03/2025
Path:	/usr/bin/rm
Arguments:	rm -f /tmp/tmp.zgX6pUASmU /tmp/tmp.Xo3dZmrSLS /tmp/tmp.b15Bmvw870
File size:	72056 bytes
MD5 hash:	aa2b5496fdbfd88e38791ab81f90b95b

File Activities

File Opened

File Deleted

File Read

Chronological Activities

Analysis Process: dash PID: 5538, Parent PID: 3635

General

Start time (UTC):	06:39:46
Start date (UTC):	20/03/2025
Path:	/usr/bin/dash
Arguments:	-
File size:	129816 bytes
MD5 hash:	1e6b1c887c59a315edb7eb9a315fc84c

Process Activities

Process Overlayed (Exec)

Chronological Activities

Analysis Process: rm PID: 5538, Parent PID: 3635

General

Start time (UTC):	06:39:46
Start date (UTC):	20/03/2025
Path:	/usr/bin/rm
Arguments:	rm -f /tmp/tmp.zgX6pUASmU /tmp/tmp.Xo3dZmrSLS /tmp/tmp.b15Bmvw870
File size:	72056 bytes
MD5 hash:	aa2b5496fdbfd88e38791ab81f90b95b

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 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

Loading Joe Sandbox Report ...

Warning!

Linux Analysis Report gigab.i686.elf

Overview

General Information

Detection

Signatures

Classification

General Information

Runtime Messages

Process Tree

Yara Signatures

Initial Sample

Suricata Signatures

Joe Sandbox Signatures

Networking

System Summary

Persistence and Installation Behavior

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

Network Behavior

TCP Packets

System Behavior

Analysis Process: dash PID: 5537, Parent PID: 3635

General

Process Activities

Process Overlayed (Exec)

Chronological Activities

Analysis Process: rm PID: 5537, Parent PID: 3635

General

File Activities

File Opened

File Deleted

File Read

Chronological Activities

Analysis Process: dash PID: 5538, Parent PID: 3635

General

Process Activities

Process Overlayed (Exec)

Chronological Activities

Analysis Process: rm PID: 5538, Parent PID: 3635

General

File Activities

File Opened

File Deleted

File Read

Chronological Activities

Linux Analysis Report
gigab.i686.elf