Linux Analysis Report
vlxx.arm6.elf

Overview

General Information

Sample name: vlxx.arm6.elf
Analysis ID: 1431579
MD5: 84cb67a658a14c04c3c29e99156b546c
SHA1: 9b467570d510c60753ede3ae3da2918522bc8d9d
SHA256: 2284ccc7eb92ccf811eaafed6c2de3c87c2020d83307a71c24c98fdcf1a881c3
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
Executes the "rm" command used to delete files or directories
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
barindex
Antivirus / Scanner detection for submitted sample
Source: vlxx.arm6.elf Avira: detected
Multi AV Scanner detection for submitted file
Source: vlxx.arm6.elf ReversingLabs: Detection: 51%
Source: vlxx.arm6.elf Virustotal: Detection: 46% Perma Link
Found strings indicative of a multi-platform dropper
Source: vlxx.arm6.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//proc/proc/%d/cmdlinewgetcurlbusyboxechoHH
Source: unknown TCP traffic detected without corresponding DNS query: 54.171.230.55
Source: unknown TCP traffic detected without corresponding DNS query: 54.171.230.55
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 58866 -> 443
Source: unknown Network traffic detected: HTTP traffic on port 443 -> 58866

System Summary
barindex
Malicious sample detected (through community Yara rule)
Source: vlxx.arm6.elf, type: SAMPLE Matched rule: Linux_Trojan_Gafgyt_28a2fe0c Author: unknown
Source: 5426.1.00007f783c017000.00007f783c036000.r-x.sdmp, type: MEMORY Matched rule: Linux_Trojan_Gafgyt_28a2fe0c Author: unknown
Source: Process Memory Space: vlxx.arm6.elf PID: 5426, 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//proc/proc/%d/cmdlinewgetcurlbusyboxechoHH
Sample has stripped symbol table
Source: ELF static info symbol of initial sample .symtab present: no
Yara signature match
Source: vlxx.arm6.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: 5426.1.00007f783c017000.00007f783c036000.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: vlxx.arm6.elf PID: 5426, 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
Executes the "rm" command used to delete files or directories
Source: /usr/bin/dash (PID: 5490) Rm executable: /usr/bin/rm -> rm -f /tmp/tmp.he9dYrTv0W /tmp/tmp.nWfwm1DF2Q /tmp/tmp.aTCW6La9l0 Jump to behavior
Source: /usr/bin/dash (PID: 5491) Rm executable: /usr/bin/rm -> rm -f /tmp/tmp.he9dYrTv0W /tmp/tmp.nWfwm1DF2Q /tmp/tmp.aTCW6La9l0 Jump to behavior
Uses the "uname" system call to query kernel version information (possible evasion)
Source: /tmp/vlxx.arm6.elf (PID: 5426) Queries kernel information via 'uname': Jump to behavior
Source: vlxx.arm6.elf, 5426.1.000055f2b73e1000.000055f2b750f000.rw-.sdmp Binary or memory string: U!/etc/qemu-binfmt/arm
Source: vlxx.arm6.elf, 5426.1.000055f2b73e1000.000055f2b750f000.rw-.sdmp Binary or memory string: /etc/qemu-binfmt/arm
Source: vlxx.arm6.elf, 5426.1.00007ffc33fdb000.00007ffc33ffc000.rw-.sdmp Binary or memory string: /usr/bin/qemu-arm
Source: vlxx.arm6.elf, 5426.1.00007ffc33fdb000.00007ffc33ffc000.rw-.sdmp Binary or memory string: x86_64/usr/bin/qemu-arm/tmp/vlxx.arm6.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/vlxx.arm6.elf
Source: vlxx.arm6.elf, 5426.1.00007ffc33fdb000.00007ffc33ffc000.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: vlxx.arm6.elf, type: SAMPLE
Source: Yara match File source: 5426.1.00007f783c017000.00007f783c036000.r-x.sdmp, type: MEMORY
Source: Yara match File source: Process Memory Space: vlxx.arm6.elf PID: 5426, type: MEMORYSTR
Yara detected Okiru
Source: Yara match File source: vlxx.arm6.elf, type: SAMPLE
Source: Yara match File source: 5426.1.00007f783c017000.00007f783c036000.r-x.sdmp, type: MEMORY
Source: Yara match File source: Process Memory Space: vlxx.arm6.elf PID: 5426, type: MEMORYSTR

Remote Access Functionality
barindex
Yara detected Mirai
Source: Yara match File source: vlxx.arm6.elf, type: SAMPLE
Source: Yara match File source: 5426.1.00007f783c017000.00007f783c036000.r-x.sdmp, type: MEMORY
Source: Yara match File source: Process Memory Space: vlxx.arm6.elf PID: 5426, type: MEMORYSTR
Yara detected Okiru
Source: Yara match File source: vlxx.arm6.elf, type: SAMPLE
Source: Yara match File source: 5426.1.00007f783c017000.00007f783c036000.r-x.sdmp, type: MEMORY
Source: Yara match File source: Process Memory Space: vlxx.arm6.elf PID: 5426, type: MEMORYSTR
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
54.171.230.55
 unknown United States
16509 AMAZON-02US false

Contacted Domains

Name IP Active
daisy.ubuntu.com 162.213.35.25 true