Linux Analysis Report
Ym7yz87EyV.elf

Overview

General Information

Sample name: Ym7yz87EyV.elf
renamed because original name is a hash value
Original sample name: 78068eac98e9fd37115c26b982e1d5ec.elf
Analysis ID: 1431595
MD5: 78068eac98e9fd37115c26b982e1d5ec
SHA1: 97647b7b46b265fbab2742847d9c4cb591cef03b
SHA256: 43f34871536a4c4659960f4ddd8f46c10308687b0a5030ebe73691e0c7dc7d00
Tags: 32elfmirairenesas
Infos:

Detection

Mirai, Okiru
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
Yara detected Okiru
Found strings indicative of a multi-platform dropper
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: Ym7yz87EyV.elf Avira: detected
Multi AV Scanner detection for submitted file
Source: Ym7yz87EyV.elf Virustotal: Detection: 41% Perma Link
Source: Ym7yz87EyV.elf ReversingLabs: Detection: 48%
Found strings indicative of a multi-platform dropper
Source: Ym7yz87EyV.elf String: HTTP/1.1 200 OKcundi.armcundi.arm5cundi.arm6cundi.arm7cundi.mipscundi.mpslcundi.x86_64cundi.sh4/proc//proc/%s/exe/proc/self/exevar/Challengeapp/hi3511gmDVRiboxusr/dvr_main _8182T_1108mnt/mtd/app/guivar/Kylinl0 c/udevdanko-app/ankosample _8182T_1104var/tmp/soniahicorestm_hi3511_dvr/bin/busybox/usr/lib/systemd/systemd/usr/libexec/openssh/sftp-serverusr/shellmnt/sys/bin/boot/media/srv/var/run/sbin/lib/etc/dev/home/Davincitelnetsshwatchdog/var/spool/var/Sofiasshd/usr/compress/bin//compress/bin/compress/usr/bashhttpdtelnetddropbearropbearencodersystem/root/dvr_gui//root/dvr_app//anko-app//opt/wgetcurlbusyboxecho/proc/proc/%d/cmdlineabcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ/usr/sbin/reboot/usr/bin/reboot/usr/sbin/shutdown/usr/bin/shutdown/usr/sbin/poweroff/usr/bin/poweroff/usr/sbin/halt/usr/bin/halt3f
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

System Summary
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Malicious sample detected (through community Yara rule)
Source: Ym7yz87EyV.elf, type: SAMPLE Matched rule: Linux_Trojan_Gafgyt_28a2fe0c Author: unknown
Source: 5492.1.00007f3bb4400000.00007f3bb441a000.r-x.sdmp, type: MEMORY Matched rule: Linux_Trojan_Gafgyt_28a2fe0c Author: unknown
Source: Process Memory Space: Ym7yz87EyV.elf PID: 5492, type: MEMORYSTR Matched rule: Linux_Trojan_Gafgyt_28a2fe0c 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: busybox
Source: Initial sample String containing 'busybox' found: HTTP/1.1 200 OKcundi.armcundi.arm5cundi.arm6cundi.arm7cundi.mipscundi.mpslcundi.x86_64cundi.sh4/proc//proc/%s/exe/proc/self/exevar/Challengeapp/hi3511gmDVRiboxusr/dvr_main _8182T_1108mnt/mtd/app/guivar/Kylinl0 c/udevdanko-app/ankosample _8182T_1104var/tmp/soniahicorestm_hi3511_dvr/bin/busybox/usr/lib/systemd/systemd/usr/libexec/openssh/sftp-serverusr/shellmnt/sys/bin/boot/media/srv/var/run/sbin/lib/etc/dev/home/Davincitelnetsshwatchdog/var/spool/var/Sofiasshd/usr/compress/bin//compress/bin/compress/usr/bashhttpdtelnetddropbearropbearencodersystem/root/dvr_gui//root/dvr_app//anko-app//opt/wgetcurlbusyboxecho/proc/proc/%d/cmdlineabcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ/usr/sbin/reboot/usr/bin/reboot/usr/sbin/shutdown/usr/bin/shutdown/usr/sbin/poweroff/usr/bin/poweroff/usr/sbin/halt/usr/bin/halt3f
Sample has stripped symbol table
Source: ELF static info symbol of initial sample .symtab present: no
Yara signature match
Source: Ym7yz87EyV.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: 5492.1.00007f3bb4400000.00007f3bb441a000.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: Ym7yz87EyV.elf PID: 5492, 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: mal80.troj.linELF@0/0@2/0
Uses the "uname" system call to query kernel version information (possible evasion)
Source: /tmp/Ym7yz87EyV.elf (PID: 5492) Queries kernel information via 'uname': Jump to behavior
Source: Ym7yz87EyV.elf, 5492.1.00007ffe71545000.00007ffe71566000.rw-.sdmp Binary or memory string: /usr/bin/qemu-sh4
Source: Ym7yz87EyV.elf, 5492.1.000055d3e8374000.000055d3e83d7000.rw-.sdmp Binary or memory string: U5!/etc/qemu-binfmt/sh4
Source: Ym7yz87EyV.elf, 5492.1.000055d3e8374000.000055d3e83d7000.rw-.sdmp Binary or memory string: /etc/qemu-binfmt/sh4
Source: Ym7yz87EyV.elf, 5492.1.00007ffe71545000.00007ffe71566000.rw-.sdmp Binary or memory string: qemu: uncaught target signal 11 (Segmentation fault) - core dumped
Source: Ym7yz87EyV.elf, 5492.1.00007ffe71545000.00007ffe71566000.rw-.sdmp Binary or memory string: x86_64/usr/bin/qemu-sh4/tmp/Ym7yz87EyV.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/Ym7yz87EyV.elf

Stealing of Sensitive Information
barindex
Yara detected Mirai
Source: Yara match File source: Ym7yz87EyV.elf, type: SAMPLE
Source: Yara match File source: 5492.1.00007f3bb4400000.00007f3bb441a000.r-x.sdmp, type: MEMORY
Source: Yara match File source: Process Memory Space: Ym7yz87EyV.elf PID: 5492, type: MEMORYSTR
Yara detected Okiru
Source: Yara match File source: Ym7yz87EyV.elf, type: SAMPLE
Source: Yara match File source: 5492.1.00007f3bb4400000.00007f3bb441a000.r-x.sdmp, type: MEMORY
Source: Yara match File source: Process Memory Space: Ym7yz87EyV.elf PID: 5492, type: MEMORYSTR

Remote Access Functionality
barindex
Yara detected Mirai
Source: Yara match File source: Ym7yz87EyV.elf, type: SAMPLE
Source: Yara match File source: 5492.1.00007f3bb4400000.00007f3bb441a000.r-x.sdmp, type: MEMORY
Source: Yara match File source: Process Memory Space: Ym7yz87EyV.elf PID: 5492, type: MEMORYSTR
Yara detected Okiru
Source: Yara match File source: Ym7yz87EyV.elf, type: SAMPLE
Source: Yara match File source: 5492.1.00007f3bb4400000.00007f3bb441a000.r-x.sdmp, type: MEMORY
Source: Yara match File source: Process Memory Space: Ym7yz87EyV.elf PID: 5492, type: MEMORYSTR

No Screenshots

⊘No contacted IP infos

Contacted Domains

Name IP Active
daisy.ubuntu.com 162.213.35.24 true