Linux Analysis Report
RpcSecurity.arm7.elf

Overview

General Information

Sample name: RpcSecurity.arm7.elf
Analysis ID: 1581161
MD5: 63559d2751b8fa7972e8bb3c0f583075
SHA1: c65d17a31fd5520780d0341e2304c273c88bac4f
SHA256: 1c3cbb053407cdddd7e476757271fd7069fd020934cd75e623581ff18060113f
Tags: elfGafgytuser-lontze7
Infos:

Detection

Mirai
Score: 76
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
Contains symbols with names commonly found in malware
Sample and/or dropped files contains symbols with suspicious names
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: RpcSecurity.arm7.elf Avira: detected
Multi AV Scanner detection for submitted file
Source: RpcSecurity.arm7.elf Virustotal: Detection: 65% Perma Link
Source: RpcSecurity.arm7.elf ReversingLabs: Detection: 65%
Sample listens on a socket
Source: /tmp/RpcSecurity.arm7.elf (PID: 5430) Socket: 192.168.2.13:9473 Jump to behavior
Tries to connect to HTTP servers, but all servers are down (expired dropper behavior)
Source: global traffic TCP traffic: 192.168.2.13:48202 -> 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: unknown UDP traffic detected without corresponding DNS query: 1.1.1.1
Source: unknown UDP traffic detected without corresponding DNS query: 1.1.1.1
Source: global traffic DNS traffic detected: DNS query: daisy.ubuntu.com
Source: unknown Network traffic detected: HTTP traffic on port 48202 -> 443

System Summary
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Malicious sample detected (through community Yara rule)
Source: RpcSecurity.arm7.elf, type: SAMPLE Matched rule: Linux_Trojan_Gafgyt_28a2fe0c Author: unknown
Source: 5430.1.00007f64e0017000.00007f64e002b000.r-x.sdmp, type: MEMORY Matched rule: Linux_Trojan_Gafgyt_28a2fe0c Author: unknown
Source: Process Memory Space: RpcSecurity.arm7.elf PID: 5430, type: MEMORYSTR Matched rule: Linux_Trojan_Gafgyt_28a2fe0c Author: unknown
Contains symbols with names commonly found in malware
Source: ELF static info symbol of initial sample Name: attack.c
Source: ELF static info symbol of initial sample Name: attack_get_opt_int
Source: ELF static info symbol of initial sample Name: attack_get_opt_ip
Source: ELF static info symbol of initial sample Name: attack_gre_ip
Source: ELF static info symbol of initial sample Name: attack_init
Source: ELF static info symbol of initial sample Name: attack_method.c
Source: ELF static info symbol of initial sample Name: attack_method_nudp
Source: ELF static info symbol of initial sample Name: attack_method_ovhudp
Source: ELF static info symbol of initial sample Name: attack_method_std
Source: ELF static info symbol of initial sample Name: attack_method_stdhex
Sample and/or dropped files contains symbols with suspicious names
Source: RpcSecurity.arm7.elf ELF static info symbol of initial sample: __gnu_unwind_execute
Source: RpcSecurity.arm7.elf ELF static info symbol of initial sample: hexPayload
Yara signature match
Source: RpcSecurity.arm7.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: 5430.1.00007f64e0017000.00007f64e002b000.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: RpcSecurity.arm7.elf PID: 5430, 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: mal76.troj.linELF@0/0@2/0
Uses the "uname" system call to query kernel version information (possible evasion)
Source: /tmp/RpcSecurity.arm7.elf (PID: 5430) Queries kernel information via 'uname': Jump to behavior
Source: RpcSecurity.arm7.elf, 5430.1.00007ffdd8294000.00007ffdd82b5000.rw-.sdmp Binary or memory string: |x86_64/usr/bin/qemu-arm/tmp/RpcSecurity.arm7.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/RpcSecurity.arm7.elf
Source: RpcSecurity.arm7.elf, 5430.1.000056479421f000.000056479434d000.rw-.sdmp Binary or memory string: /etc/qemu-binfmt/arm
Source: RpcSecurity.arm7.elf, 5430.1.00007ffdd8294000.00007ffdd82b5000.rw-.sdmp Binary or memory string: /usr/bin/qemu-arm
Source: RpcSecurity.arm7.elf, 5430.1.000056479421f000.000056479434d000.rw-.sdmp Binary or memory string: GV!/etc/qemu-binfmt/arm
Source: RpcSecurity.arm7.elf, 5430.1.00007ffdd8294000.00007ffdd82b5000.rw-.sdmp Binary or memory string: qemu: uncaught target signal 11 (Segmentation fault) - core dumped

Stealing of Sensitive Information
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Yara detected Mirai
Source: Yara match File source: RpcSecurity.arm7.elf, type: SAMPLE

Remote Access Functionality
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Yara detected Mirai
Source: Yara match File source: RpcSecurity.arm7.elf, type: SAMPLE
windows-stand
  • 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

Contacted Domains

Name IP Active
daisy.ubuntu.com 162.213.35.25 true