Linux Analysis Report
zmap.arm.elf

Overview

General Information

Sample name: zmap.arm.elf
Analysis ID: 1544691
MD5: 823958d1dbb59368ec9cb465345ede82
SHA1: 4246851d3b9f1b59c45e2069fc1e204fa2937fc6
SHA256: ce3fcb923990e59f2bcee0f811a868fa7a0abf2a461b54974977d1db6e940aee
Tags: elfMiraiuser-abuse_ch
Infos:

Detection

Mirai, Okiru
Score: 84
Range: 0 - 100
Whitelisted: false

Signatures

Antivirus / Scanner detection for submitted sample
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for submitted file
Yara detected Mirai
Yara detected Okiru
Sample deletes itself
Detected TCP or UDP traffic on non-standard ports
Sample has stripped symbol table
Sample listens on a socket
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

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 https://malpedia.caad.fkie.fraunhofer.de/details/elf.mirai

AV Detection
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Antivirus / Scanner detection for submitted sample
Source: zmap.arm.elf Avira: detected
Multi AV Scanner detection for submitted file
Source: zmap.arm.elf ReversingLabs: Detection: 63%
Detected TCP or UDP traffic on non-standard ports
Source: global traffic TCP traffic: 192.168.2.14:54784 -> 154.216.20.164:59962
Sample listens on a socket
Source: /tmp/zmap.arm.elf (PID: 5513) Socket: 127.0.0.1:39148 Jump to behavior
Tries to connect to HTTP servers, but all servers are down (expired dropper behavior)
Source: global traffic TCP traffic: 192.168.2.14:46540 -> 185.125.190.26:443
Source: unknown TCP traffic detected without corresponding DNS query: 185.125.190.26
Source: unknown TCP traffic detected without corresponding DNS query: 185.125.190.26
Source: global traffic DNS traffic detected: DNS query: cnc.dico-inside.com
Source: unknown Network traffic detected: HTTP traffic on port 46540 -> 443

System Summary
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Malicious sample detected (through community Yara rule)
Source: zmap.arm.elf, type: SAMPLE Matched rule: Linux_Trojan_Gafgyt_28a2fe0c Author: unknown
Source: 5517.1.00007ffa80017000.00007ffa8002a000.r-x.sdmp, type: MEMORY Matched rule: Linux_Trojan_Gafgyt_28a2fe0c Author: unknown
Source: 5513.1.00007ffa80017000.00007ffa8002a000.r-x.sdmp, type: MEMORY Matched rule: Linux_Trojan_Gafgyt_28a2fe0c Author: unknown
Source: Process Memory Space: zmap.arm.elf PID: 5513, type: MEMORYSTR Matched rule: Linux_Trojan_Gafgyt_28a2fe0c Author: unknown
Source: Process Memory Space: zmap.arm.elf PID: 5517, type: MEMORYSTR Matched rule: Linux_Trojan_Gafgyt_28a2fe0c Author: unknown
Sample has stripped symbol table
Source: ELF static info symbol of initial sample .symtab present: no
Yara signature match
Source: zmap.arm.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: 5517.1.00007ffa80017000.00007ffa8002a000.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: 5513.1.00007ffa80017000.00007ffa8002a000.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: Process Memory Space: zmap.arm.elf PID: 5513, 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: Process Memory Space: zmap.arm.elf PID: 5517, 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: mal84.troj.evad.linELF@0/0@23/0

Hooking and other Techniques for Hiding and Protection
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Sample deletes itself
Source: /tmp/zmap.arm.elf (PID: 5513) File: /tmp/zmap.arm.elf Jump to behavior
Uses the "uname" system call to query kernel version information (possible evasion)
Source: /tmp/zmap.arm.elf (PID: 5513) Queries kernel information via 'uname': Jump to behavior
Source: zmap.arm.elf, 5513.1.00007ffdb7d57000.00007ffdb7d78000.rw-.sdmp, zmap.arm.elf, 5517.1.00007ffdb7d57000.00007ffdb7d78000.rw-.sdmp Binary or memory string: x86_64/usr/bin/qemu-arm/tmp/zmap.arm.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/zmap.arm.elf
Source: zmap.arm.elf, 5513.1.0000558bd0919000.0000558bd0a47000.rw-.sdmp, zmap.arm.elf, 5517.1.0000558bd0919000.0000558bd0a47000.rw-.sdmp Binary or memory string: U!/etc/qemu-binfmt/arm
Source: zmap.arm.elf, 5513.1.0000558bd0919000.0000558bd0a47000.rw-.sdmp, zmap.arm.elf, 5517.1.0000558bd0919000.0000558bd0a47000.rw-.sdmp Binary or memory string: /etc/qemu-binfmt/arm
Source: zmap.arm.elf, 5513.1.00007ffdb7d57000.00007ffdb7d78000.rw-.sdmp, zmap.arm.elf, 5517.1.00007ffdb7d57000.00007ffdb7d78000.rw-.sdmp Binary or memory string: /usr/bin/qemu-arm

Stealing of Sensitive Information
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Yara detected Mirai
Source: Yara match File source: zmap.arm.elf, type: SAMPLE
Source: Yara match File source: 5517.1.00007ffa80017000.00007ffa8002a000.r-x.sdmp, type: MEMORY
Source: Yara match File source: 5513.1.00007ffa80017000.00007ffa8002a000.r-x.sdmp, type: MEMORY
Source: Yara match File source: Process Memory Space: zmap.arm.elf PID: 5513, type: MEMORYSTR
Source: Yara match File source: Process Memory Space: zmap.arm.elf PID: 5517, type: MEMORYSTR
Yara detected Okiru
Source: Yara match File source: zmap.arm.elf, type: SAMPLE
Source: Yara match File source: 5517.1.00007ffa80017000.00007ffa8002a000.r-x.sdmp, type: MEMORY
Source: Yara match File source: 5513.1.00007ffa80017000.00007ffa8002a000.r-x.sdmp, type: MEMORY
Source: Yara match File source: Process Memory Space: zmap.arm.elf PID: 5513, type: MEMORYSTR
Source: Yara match File source: Process Memory Space: zmap.arm.elf PID: 5517, type: MEMORYSTR

Remote Access Functionality
barindex
Yara detected Mirai
Source: Yara match File source: zmap.arm.elf, type: SAMPLE
Source: Yara match File source: 5517.1.00007ffa80017000.00007ffa8002a000.r-x.sdmp, type: MEMORY
Source: Yara match File source: 5513.1.00007ffa80017000.00007ffa8002a000.r-x.sdmp, type: MEMORY
Source: Yara match File source: Process Memory Space: zmap.arm.elf PID: 5513, type: MEMORYSTR
Source: Yara match File source: Process Memory Space: zmap.arm.elf PID: 5517, type: MEMORYSTR
Yara detected Okiru
Source: Yara match File source: zmap.arm.elf, type: SAMPLE
Source: Yara match File source: 5517.1.00007ffa80017000.00007ffa8002a000.r-x.sdmp, type: MEMORY
Source: Yara match File source: 5513.1.00007ffa80017000.00007ffa8002a000.r-x.sdmp, type: MEMORY
Source: Yara match File source: Process Memory Space: zmap.arm.elf PID: 5513, type: MEMORYSTR
Source: Yara match File source: Process Memory Space: zmap.arm.elf PID: 5517, type: MEMORYSTR

No Screenshots

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

Contacted Public IPs

IP Domain Country Flag ASN ASN Name Malicious
185.125.190.26
 unknown United Kingdom
41231 CANONICAL-ASGB false
154.216.20.164
 cnc.dico-inside.com Seychelles
135357 SKHT-ASShenzhenKatherineHengTechnologyInformationCo false

Contacted Domains

Name IP Active
cnc.dico-inside.com 154.216.20.164 true