Linux Analysis Report
7Jx3RR70A1.elf

Overview

General Information

Sample name: 7Jx3RR70A1.elf
renamed because original name is a hash value
Original sample name: 8df6746b19b96c2bb02c1445cd3008fa.elf
Analysis ID: 1528592
MD5: 8df6746b19b96c2bb02c1445cd3008fa
SHA1: 6b27e2ee55de7b53fdedcbe02f53cba742147918
SHA256: 2060fd250d501d78d51c02eafd5057105b974bb11239a3507be58b7ef86d073e
Tags: 32armelfmirai
Infos:

Detection

Mirai
Score: 72
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

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: 7Jx3RR70A1.elf Avira: detected
Multi AV Scanner detection for submitted file
Source: 7Jx3RR70A1.elf ReversingLabs: Detection: 65%
Source: 7Jx3RR70A1.elf Virustotal: Detection: 64% Perma Link

System Summary
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Malicious sample detected (through community Yara rule)
Source: 7Jx3RR70A1.elf, type: SAMPLE Matched rule: Linux_Trojan_Gafgyt_28a2fe0c Author: unknown
Source: 7Jx3RR70A1.elf, type: SAMPLE Matched rule: Linux_Trojan_Gafgyt_ea92cca8 Author: unknown
Source: 5425.1.00007fd454017000.00007fd454032000.r-x.sdmp, type: MEMORY Matched rule: Linux_Trojan_Gafgyt_28a2fe0c Author: unknown
Source: 5425.1.00007fd454017000.00007fd454032000.r-x.sdmp, type: MEMORY Matched rule: Linux_Trojan_Gafgyt_ea92cca8 Author: unknown
Source: Process Memory Space: 7Jx3RR70A1.elf PID: 5425, type: MEMORYSTR Matched rule: Linux_Trojan_Gafgyt_28a2fe0c Author: unknown
Source: Process Memory Space: 7Jx3RR70A1.elf PID: 5425, 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: /bin/busybox
Source: Initial sample String containing 'busybox' found: /bin/busybox/usr/lib/systemd/systemd/usr/libexec/openssh/sftp-serverusr/shellmnt/sys/bin/boot/media/srv/var/run/sbin/lib/etc/dev/telnetsshwatchdogsshd/usr/compress/bin//compress/bin/compress/usr/bashmain_x86main_x86_64main_mipsmain_mipselmain_armmain_arm5main_arm6main_arm7main_ppcmain_m68kmain_sh4main_spchttpdtelnetddropbearropbearencodersystem/root/dvr_gui//root/dvr_app//anko-app//opt//tmp/var/mnt/boot/home/dev/..//root(deleted)/proc/self/exe
Sample has stripped symbol table
Source: ELF static info symbol of initial sample .symtab present: no
Yara signature match
Source: 7Jx3RR70A1.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: 7Jx3RR70A1.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: 5425.1.00007fd454017000.00007fd454032000.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: 5425.1.00007fd454017000.00007fd454032000.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: 7Jx3RR70A1.elf PID: 5425, 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: 7Jx3RR70A1.elf PID: 5425, 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: mal72.troj.linELF@0/0@0/0
Uses the "uname" system call to query kernel version information (possible evasion)
Source: /tmp/7Jx3RR70A1.elf (PID: 5425) Queries kernel information via 'uname': Jump to behavior
Source: 7Jx3RR70A1.elf, 5425.1.000055ae3bd1e000.000055ae3be4c000.rw-.sdmp Binary or memory string: U!/etc/qemu-binfmt/arm
Source: 7Jx3RR70A1.elf, 5425.1.000055ae3bd1e000.000055ae3be4c000.rw-.sdmp Binary or memory string: /etc/qemu-binfmt/arm
Source: 7Jx3RR70A1.elf, 5425.1.00007ffe4d6bf000.00007ffe4d6e0000.rw-.sdmp Binary or memory string: /usr/bin/qemu-arm
Source: 7Jx3RR70A1.elf, 5425.1.00007ffe4d6bf000.00007ffe4d6e0000.rw-.sdmp Binary or memory string: x86_64/usr/bin/qemu-arm/tmp/7Jx3RR70A1.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/7Jx3RR70A1.elf

Stealing of Sensitive Information
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Yara detected Mirai
Source: Yara match File source: 7Jx3RR70A1.elf, type: SAMPLE
Source: Yara match File source: 5425.1.00007fd454017000.00007fd454032000.r-x.sdmp, type: MEMORY
Source: Yara match File source: Process Memory Space: 7Jx3RR70A1.elf PID: 5425, type: MEMORYSTR

Remote Access Functionality
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Yara detected Mirai
Source: Yara match File source: 7Jx3RR70A1.elf, type: SAMPLE
Source: Yara match File source: 5425.1.00007fd454017000.00007fd454032000.r-x.sdmp, type: MEMORY
Source: Yara match File source: Process Memory Space: 7Jx3RR70A1.elf PID: 5425, type: MEMORYSTR
windows-stand
⊘No contacted IP infos