Linux Analysis Report
na.elf

Overview

General Information

Sample name: na.elf
Analysis ID: 1527282
MD5: 9426bb39167da62b60d404358c60703a
SHA1: 381ef6fd0d306d06210fad1c3cb363a3af519364
SHA256: 1dbe89b574dc948b010028fc9948ac9d58c10b1295eb51d5d31dfd26e7f80de8
Tags: elfMiraiuser-abuse_ch
Infos:

Detection

Mirai, Okiru
Score: 72
Range: 0 - 100
Whitelisted: false

Signatures

Antivirus / Scanner detection for submitted sample
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)

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: na.elf Avira: detected
Multi AV Scanner detection for submitted file
Source: na.elf ReversingLabs: Detection: 60%
Found strings indicative of a multi-platform dropper
Source: na.elf String: byte/proc//proc/%s/exe/proc/self/exe/proc/proc/%d/cmdlinenetstatwgettftpftpcurlbusybox/bin/busyboxvar/Challengeapp/hi3511gmDVRiboxusr/dvr_main _8182T_1108mnt/mtd/app/guivar/Kylinl0 c/udevdanko-app/ankosample _8182T_1104var/tmp/soniahicorestm_hi3511_dvr/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/soraarmx86dbgmipsmpslbot/var/run/mnt/root/var/tmp/boot/bin/sbin/../(deleted)/homemipselarm4arm5arm6arm7sh4m68kx586x86_64i586i686ppcspcbyte-mirai.kro.kr68.183.18.151
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
Sample contains strings indicative of BusyBox which embeds multiple Unix commands in a single executable
Source: Initial sample String containing 'busybox' found: busybox
Source: Initial sample String containing 'busybox' found: /bin/busybox
Source: Initial sample String containing 'busybox' found: byte/proc//proc/%s/exe/proc/self/exe/proc/proc/%d/cmdlinenetstatwgettftpftpcurlbusybox/bin/busyboxvar/Challengeapp/hi3511gmDVRiboxusr/dvr_main _8182T_1108mnt/mtd/app/guivar/Kylinl0 c/udevdanko-app/ankosample _8182T_1104var/tmp/soniahicorestm_hi3511_dvr/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/soraarmx86dbgmipsmpslbot/var/run/mnt/root/var/tmp/boot/bin/sbin/../(deleted)/homemipselarm4arm5arm6arm7sh4m68kx586x86_64i586i686ppcspcbyte-mirai.kro.kr68.183.18.151
Sample has stripped symbol table
Source: ELF static info symbol of initial sample .symtab present: no
Source: classification engine Classification label: mal72.troj.linELF@0/0@2/0
Uses the "uname" system call to query kernel version information (possible evasion)
Source: /tmp/na.elf (PID: 5528) Queries kernel information via 'uname': Jump to behavior
Source: na.elf, 5528.1.00007ffcfc36d000.00007ffcfc38e000.rw-.sdmp Binary or memory string: 6x86_64/usr/bin/qemu-arm/tmp/na.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/na.elf
Source: na.elf, 5528.1.000055f780594000.000055f7806c2000.rw-.sdmp Binary or memory string: U!/etc/qemu-binfmt/arm
Source: na.elf, 5528.1.000055f780594000.000055f7806c2000.rw-.sdmp Binary or memory string: /etc/qemu-binfmt/arm
Source: na.elf, 5528.1.00007ffcfc36d000.00007ffcfc38e000.rw-.sdmp Binary or memory string: /usr/bin/qemu-arm
Source: na.elf, 5528.1.00007ffcfc36d000.00007ffcfc38e000.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: na.elf, type: SAMPLE
Source: Yara match File source: 5528.1.00007fefb0017000.00007fefb002a000.r-x.sdmp, type: MEMORY
Source: Yara match File source: Process Memory Space: na.elf PID: 5528, type: MEMORYSTR
Yara detected Okiru
Source: Yara match File source: na.elf, type: SAMPLE
Source: Yara match File source: 5528.1.00007fefb0017000.00007fefb002a000.r-x.sdmp, type: MEMORY
Source: Yara match File source: Process Memory Space: na.elf PID: 5528, type: MEMORYSTR

Remote Access Functionality
barindex
Yara detected Mirai
Source: Yara match File source: na.elf, type: SAMPLE
Source: Yara match File source: 5528.1.00007fefb0017000.00007fefb002a000.r-x.sdmp, type: MEMORY
Source: Yara match File source: Process Memory Space: na.elf PID: 5528, type: MEMORYSTR
Yara detected Okiru
Source: Yara match File source: na.elf, type: SAMPLE
Source: Yara match File source: 5528.1.00007fefb0017000.00007fefb002a000.r-x.sdmp, type: MEMORY
Source: Yara match File source: Process Memory Space: na.elf PID: 5528, type: MEMORYSTR
windows-stand
⊘No contacted IP infos

Contacted Domains

Name IP Active
daisy.ubuntu.com 162.213.35.24 true