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Linux Analysis Report
gigab.x86.elf

Overview

General Information

Sample name:	gigab.x86.elf
Analysis ID:	1646315
MD5:	cda8aafa42669acc3b70179fb4872b56
SHA1:	cf3801fff6e12829f46d008a10c7f512e5a66c58
SHA256:	88582984e9110954035d2defbce8e7e99e3d7b3381390a0c0b3aadf4976d57d6
Tags:	elfuser-abuse_ch
Infos:
Errors No process behavior to analyse as no analysis process or sample was found

Detection

Score:	48
Range:	0 - 100

Signatures

Malicious sample detected (through community Yara rule)

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

Yara signature match

Classification

General Information

Joe Sandbox version:	42.0.0 Malachite
Analysis ID:	1646315
Start date and time:	2025-03-23 21:58:05 +01:00
Joe Sandbox product:	CloudBasic
Overall analysis duration:	0h 4m 26s
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.x86.elf
Detection:	MAL
Classification:	mal48.linELF@0/0@0/0

Errors

No process behavior to analyse as no analysis process or sample was found

Runtime Messages

Command:	/tmp/gigab.x86.elf
PID:	6241
Exit Code:	139
Exit Code Info:	SIGSEGV (11) Segmentation fault invalid memory reference
Killed:	False
Standard Output:
Standard Error:

Yara Signatures

Initial Sample

Source	Rule	Description	Author	Strings
gigab.x86.elf	Linux_Trojan_Gafgyt_a6a2adb9	unknown	unknown	0x8a6:$a: CC 01 C2 89 55 B4 8B 45 B4 C9 C3 55 48 89 E5 48 81 EC 90 00
gigab.x86.elf	Linux_Trojan_Gafgyt_f3d83a74	unknown	unknown	0x7cc:$a: DC 00 74 1B 83 7D E0 0A 75 15 83 7D E4 00 79 0F C7 45 C8 01 00
gigab.x86.elf	Linux_Trojan_Gafgyt_a0a4de11	unknown	unknown	0x281f:$a: 42 0D 83 C8 10 88 42 0D 48 8B 55 D8 0F B6 42 0D 83 C8 08 88
gigab.x86.elf	Linux_Trojan_Gafgyt_09c3070e	unknown	unknown	0xfa8:$a: 48 C1 E8 06 48 89 C6 48 8B 94 C5 50 FF FF FF 8B 8D 2C FF FF FF 83 0x105d:$a: 48 C1 E8 06 48 89 C6 48 8B 94 C5 50 FF FF FF 8B 8D 2C FF FF FF 83 0x129e:$a: 48 C1 E8 06 48 89 C6 48 8B 94 C5 50 FF FF FF 8B 8D 2C FF FF FF 83
gigab.x86.elf	Linux_Trojan_Gafgyt_46eec778	unknown	unknown	0x1635:$a: C0 01 45 F8 48 83 45 E8 02 83 6D C8 02 83 7D C8 01 7F E4 83 7D
gigab.x86.elf	Linux_Trojan_Gafgyt_dd0d6173	unknown	unknown	0x174d:$a: 55 F8 8B 45 F0 89 42 0C 48 8B 55 F8 8B 45 F4 89 42 10 C9 C3 55 48
gigab.x86.elf	Linux_Trojan_Gafgyt_779e142f	unknown	unknown	0x6ee:$a: EC 8B 45 E8 83 E0 02 85 C0 74 07 C7 45 D8 30 00 00 00 8B 45 E8 83
gigab.x86.elf	Linux_Trojan_Gafgyt_cf84c9f2	unknown	unknown	0x323:$a: 55 48 89 E5 48 83 EC 30 48 89 7D E8 89 75 E4 89 55 E0 C7 45 F8 01 00
gigab.x86.elf	Linux_Trojan_Gafgyt_e4a1982b	unknown	unknown	0x317:$a: 8B 45 EC F7 D0 21 D0 33 45 FC C9 C3 55 48 89 E5 48 83 EC 30 48 89
gigab.x86.elf	Linux_Trojan_Gafgyt_862c4e0e	unknown	unknown	0x16b0:$a: 02 89 45 F8 8B 45 F8 C1 E8 10 85 C0 75 E6 8B 45 F8 F7 D0 0F
Click to see the 5 entries

Suricata Signatures

⊘No Suricata rule has matched

Joe Sandbox Signatures

• Networking
• System Summary

Click to jump to signature section

Show All Signature Results

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: gigab.x86.elf, type: SAMPLE	Matched rule: Linux_Trojan_Gafgyt_a6a2adb9 Author: unknown
Source: gigab.x86.elf, type: SAMPLE	Matched rule: Linux_Trojan_Gafgyt_f3d83a74 Author: unknown
Source: gigab.x86.elf, type: SAMPLE	Matched rule: Linux_Trojan_Gafgyt_a0a4de11 Author: unknown
Source: gigab.x86.elf, type: SAMPLE	Matched rule: Linux_Trojan_Gafgyt_09c3070e Author: unknown
Source: gigab.x86.elf, type: SAMPLE	Matched rule: Linux_Trojan_Gafgyt_46eec778 Author: unknown
Source: gigab.x86.elf, type: SAMPLE	Matched rule: Linux_Trojan_Gafgyt_dd0d6173 Author: unknown
Source: gigab.x86.elf, type: SAMPLE	Matched rule: Linux_Trojan_Gafgyt_779e142f Author: unknown
Source: gigab.x86.elf, type: SAMPLE	Matched rule: Linux_Trojan_Gafgyt_cf84c9f2 Author: unknown
Source: gigab.x86.elf, type: SAMPLE	Matched rule: Linux_Trojan_Gafgyt_e4a1982b Author: unknown
Source: gigab.x86.elf, type: SAMPLE	Matched rule: Linux_Trojan_Gafgyt_862c4e0e Author: unknown

Source: gigab.x86.elf, type: SAMPLE	Matched rule: Linux_Trojan_Gafgyt_a6a2adb9 reference_sample = 275cbd5d3b3d8c521649b95122d90d1ca9b7ae1958b721bdc158aaa2d31d49df, os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Gafgyt, fingerprint = cdd0bb9ce40a000bb86b0c76616fe71fb7dbb87a044ddd778b7a07fdf804b877, id = a6a2adb9-9d54-42d4-abed-5b30d8062e97, last_modified = 2021-09-16
Source: gigab.x86.elf, type: SAMPLE	Matched rule: Linux_Trojan_Gafgyt_f3d83a74 reference_sample = 275cbd5d3b3d8c521649b95122d90d1ca9b7ae1958b721bdc158aaa2d31d49df, os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Gafgyt, fingerprint = 1c5df68501b688905484ed47dc588306828aa7c114644428e22e5021bb39bd4a, id = f3d83a74-2888-435a-9a3c-b7de25084e9a, last_modified = 2021-09-16
Source: gigab.x86.elf, type: SAMPLE	Matched rule: Linux_Trojan_Gafgyt_a0a4de11 reference_sample = cf1ca1d824c8687e87a5b0275a0e39fa101442b4bbf470859ddda9982f9b3417, os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Gafgyt, fingerprint = 891cfc6a4c38fb257ada29050e0047bd1301e8f0a6a1a919685b1fcc2960b047, id = a0a4de11-fe65-449f-a990-ad5f18ac66f0, last_modified = 2021-09-16
Source: gigab.x86.elf, type: SAMPLE	Matched rule: Linux_Trojan_Gafgyt_09c3070e reference_sample = 275cbd5d3b3d8c521649b95122d90d1ca9b7ae1958b721bdc158aaa2d31d49df, os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Gafgyt, fingerprint = 84fad96b60b297736c149e14de12671ff778bff427ab7684df2c541a6f6d7e7d, id = 09c3070e-4b71-45a0-aa62-0cc6e496644a, last_modified = 2021-09-16
Source: gigab.x86.elf, type: SAMPLE	Matched rule: Linux_Trojan_Gafgyt_46eec778 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 = 2602371a40171870b1cf024f262e95a2853de53de39c3a6cd3de811e81dd3518, id = 46eec778-7342-4ef7-adac-35bc0cdb9867, last_modified = 2021-09-16
Source: gigab.x86.elf, type: SAMPLE	Matched rule: Linux_Trojan_Gafgyt_dd0d6173 reference_sample = c5a317d0d8470814ff343ce78ad2428ebb3f036763fcf703a589b6c4d33a3ec6, os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Gafgyt, fingerprint = 5e2cb111c2b712951b71166111d339724b4f52b93f90cb474f1e67598212605f, id = dd0d6173-b863-45cf-9348-3375a4e624cf, last_modified = 2021-09-16
Source: gigab.x86.elf, type: SAMPLE	Matched rule: Linux_Trojan_Gafgyt_779e142f reference_sample = 275cbd5d3b3d8c521649b95122d90d1ca9b7ae1958b721bdc158aaa2d31d49df, os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Gafgyt, fingerprint = 83377b6fa77fda4544c409487d2d2c1ddcef8f7d4120f49a18888c7536f3969f, id = 779e142f-b867-46e6-b1fb-9105976f42fd, last_modified = 2021-09-16
Source: gigab.x86.elf, type: SAMPLE	Matched rule: Linux_Trojan_Gafgyt_cf84c9f2 reference_sample = 275cbd5d3b3d8c521649b95122d90d1ca9b7ae1958b721bdc158aaa2d31d49df, os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Gafgyt, fingerprint = bb766b356c3e8706740e3bb9b4a7171d8eb5137e09fc7ab6952412fa55e2dcfc, id = cf84c9f2-7435-4faf-8c5f-d14945ffad7a, last_modified = 2021-09-16
Source: gigab.x86.elf, type: SAMPLE	Matched rule: Linux_Trojan_Gafgyt_e4a1982b os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Gafgyt, fingerprint = d9f852c28433128b0fd330bee35f7bd4aada5226e9ca865fe5cd8cca52b2a622, id = e4a1982b-928a-4da5-b497-cedc1d26e845, last_modified = 2021-09-16
Source: gigab.x86.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

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 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.x86.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
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	na.elf	Get hash	malicious	Prometei	Browse
	na.elf	Get hash	malicious	Prometei	Browse
	na.elf	Get hash	malicious	Prometei	Browse
	Aqua.x86.elf	Get hash	malicious	Unknown	Browse
	gigab.m68.elf	Get hash	malicious	Unknown	Browse
	gigab.ppc.elf	Get hash	malicious	Unknown	Browse
	gigab.arm6.elf	Get hash	malicious	Unknown	Browse
	na.elf	Get hash	malicious	Prometei	Browse
	gigab.arm5.elf	Get hash	malicious	Unknown	Browse
	na.elf	Get hash	malicious	Prometei	Browse
91.189.91.42	na.elf	Get hash	malicious	Prometei	Browse
	na.elf	Get hash	malicious	Prometei	Browse
	na.elf	Get hash	malicious	Prometei	Browse
	Aqua.x86.elf	Get hash	malicious	Unknown	Browse
	gigab.m68.elf	Get hash	malicious	Unknown	Browse
	gigab.ppc.elf	Get hash	malicious	Unknown	Browse
	gigab.arm6.elf	Get hash	malicious	Unknown	Browse
	na.elf	Get hash	malicious	Prometei	Browse
	gigab.arm5.elf	Get hash	malicious	Unknown	Browse
	na.elf	Get hash	malicious	Prometei	Browse

Domains

⊘No context

ASNs

Match	Associated Sample Name / URL	SHA 256	Detection	Threat Name	Link	Context
CANONICAL-ASGB	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
	Aqua.x86.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	gigab.m68.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	gigab.ppc.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	gigab.arm6.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	na.elf	Get hash	malicious	Prometei	Browse	91.189.91.42
	gigab.arm5.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	na.elf	Get hash	malicious	Prometei	Browse	91.189.91.42
CANONICAL-ASGB	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
	Aqua.x86.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	gigab.m68.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	gigab.ppc.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	gigab.arm6.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	na.elf	Get hash	malicious	Prometei	Browse	91.189.91.42
	gigab.arm5.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	na.elf	Get hash	malicious	Prometei	Browse	91.189.91.42
INIT7CH	na.elf	Get hash	malicious	Prometei	Browse	109.202.202.202
	na.elf	Get hash	malicious	Prometei	Browse	109.202.202.202
	na.elf	Get hash	malicious	Prometei	Browse	109.202.202.202
	Aqua.x86.elf	Get hash	malicious	Unknown	Browse	109.202.202.202
	gigab.m68.elf	Get hash	malicious	Unknown	Browse	109.202.202.202
	gigab.ppc.elf	Get hash	malicious	Unknown	Browse	109.202.202.202
	gigab.arm6.elf	Get hash	malicious	Unknown	Browse	109.202.202.202
	na.elf	Get hash	malicious	Prometei	Browse	109.202.202.202
	gigab.arm5.elf	Get hash	malicious	Unknown	Browse	109.202.202.202
	na.elf	Get hash	malicious	Prometei	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 64-bit LSB executable, x86-64, version 1 (SYSV), statically linked, missing section headers at 76920
Entropy (8bit):	5.745052725019943
TrID:	ELF Executable and Linkable format (generic) (4004/1) 100.00%
File name:	gigab.x86.elf
File size:	12'767 bytes
MD5:	cda8aafa42669acc3b70179fb4872b56
SHA1:	cf3801fff6e12829f46d008a10c7f512e5a66c58
SHA256:	88582984e9110954035d2defbce8e7e99e3d7b3381390a0c0b3aadf4976d57d6
SHA512:	23685a63943817f119621b9519c9930cf310db23382f7ab8940bbb40b2401adb40bc42065df21ce4091d5b2fe7e2a321c8d6ec07ba50f6cf981ef435656082ae
SSDEEP:	192:GHBGjC9em2ed0+k+aa+HzEb+0vSKGYd1RwBx/DdbEiqk5l++xo6daKSs5lFDJKkE:Jj/ei+k+F+HIbjSKGER2NQGD356Aq
TLSH:	E242643E62B1E039C10761F06DE7C5E2F550B1780775B18B2BC12D256A73AA6ADED383
File Content Preview:	.ELF..............>.......@.....@.......x)..........@.8...@.......................@.......@....................... .......................`.......`......)................ .....Q.td....................................................H...._....z...H........

Network Behavior

Download Network PCAP: filtered – full

Network Port Distribution

Total Packets: 7
• 443 (HTTPS)
• 80 (HTTP)

TCP Packets

Timestamp	Source Port	Dest Port	Source IP	Dest IP
Mar 23, 2025 21:58:51.543592930 CET	43928	443	192.168.2.23	91.189.91.42
Mar 23, 2025 21:58:57.175056934 CET	42836	443	192.168.2.23	91.189.91.43
Mar 23, 2025 21:58:58.454761982 CET	42516	80	192.168.2.23	109.202.202.202
Mar 23, 2025 21:59:11.508831024 CET	43928	443	192.168.2.23	91.189.91.42
Mar 23, 2025 21:59:23.795258045 CET	42836	443	192.168.2.23	91.189.91.43
Mar 23, 2025 21:59:27.890652895 CET	42516	80	192.168.2.23	109.202.202.202
Mar 23, 2025 21:59:52.463824034 CET	43928	443	192.168.2.23	91.189.91.42

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.x86.elf

Overview

General Information

Detection

Signatures

Classification

General Information

Errors

Runtime Messages

Yara Signatures

Initial Sample

Suricata Signatures

Joe Sandbox Signatures

Networking

System Summary

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

Network Port Distribution

TCP Packets

System Behavior

Linux Analysis Report
gigab.x86.elf