Linux Analysis Report
epLN92K8RM.elf

Overview

General Information

Sample name: epLN92K8RM.elf
renamed because original name is a hash value
Original sample name: 841053d589a65b8d45bc4a77e8ffcb6d.elf
Analysis ID: 1427665
MD5: 841053d589a65b8d45bc4a77e8ffcb6d
SHA1: 8b0d636a1f0003b0c624554376e65e32df460f2e
SHA256: 040f51898d55ee984fbb3bc4cb9b593a6f0926ebbf0aaaef5ebc3a86ff5b3ea5
Tags: 32armelfmirai
Infos:

Detection

Mirai
Score: 84
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
Performs DNS queries to domains with low reputation
Queries the IP of a very long domain name
Sample deletes itself
Creates hidden files and/or directories
Detected TCP or UDP traffic on non-standard ports
Enumerates processes within the "proc" file system
Found strings indicative of a multi-platform dropper
Sample has stripped symbol table
Sample tries to kill a process (SIGKILL)
Tries to connect to HTTP servers, but all servers are down (expired dropper behavior)
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
Source: epLN92K8RM.elf Avira: detected
Source: epLN92K8RM.elf ReversingLabs: Detection: 42%
Source: epLN92K8RM.elf String: EOF/proc//proc/%s/cmdlinewgetcurlftpechokillbashrebootshutdownhaltpoweroff[locker] killed process: %s ;; pid: %d

Networking

barindex
Source: DNS query: kovey.mezo-api.xyz
Source: unknown DNS traffic detected: query: kovey.mezo-api.xyz.= f66PV,PV!E(:b5KK= fOOPV!PV,EArY@@
Source: unknown DNS traffic detected: query: kovey.mezo-api.xyz.= f&-66PV,PV!E(:5IK= f-OOPV!PV,EArl@@p
Source: unknown DNS traffic detected: query: kovey.mezo-api.xyz.= f66PV,PV!E(o95K= fVOOPV!PV,EAr@@U
Source: unknown DNS traffic detected: query: kovey.mezo-api.xyz.= f_`66PV,PV!E(h:E5WK= f`OOPV!PV,EAr@@=
Source: unknown DNS traffic detected: query: kovey.mezo-api.xyz.= f466PV,PV!E(:Z5K= fJJPV!PV,E<[@@EC
Source: unknown DNS traffic detected: query: kovey.mezo-api.xyz.= fG$66PV,PV!E(#_:5?H8= f&OOPV!PV,EAX@@
Source: unknown DNS traffic detected: query: kovey.mezo-api.xyz.= f66PV,PV!E()jL5FA8= fkOOPV!PV,EAi@@s
Source: unknown DNS traffic detected: query: kovey.mezo-api.xyz.= f]66PV,PV!E(ij5e"8= f_OOPV!PV,EA@@Z
Source: unknown DNS traffic detected: query: kovey.mezo-api.xyz.= f66PV,PV!E(+958= fOOPV!PV,EA@@Y
Source: unknown DNS traffic detected: query: kovey.mezo-api.xyz.= f66PV,PV!E(kj5d#8= fJJPV!PV,E<)@@
Source: global traffic TCP traffic: 192.168.2.23:40172 -> 45.131.111.219:33966
Source: global traffic TCP traffic: 192.168.2.23:50014 -> 89.190.156.145:7733
Source: global traffic TCP traffic: 192.168.2.23:43928 -> 91.189.91.42:443
Source: global traffic TCP traffic: 192.168.2.23:42836 -> 91.189.91.43:443
Source: global traffic TCP traffic: 192.168.2.23:42516 -> 109.202.202.202:80
Source: unknown TCP traffic detected without corresponding DNS query: 91.189.91.42
Source: unknown TCP traffic detected without corresponding DNS query: 89.190.156.145
Source: unknown TCP traffic detected without corresponding DNS query: 89.190.156.145
Source: unknown TCP traffic detected without corresponding DNS query: 89.190.156.145
Source: unknown TCP traffic detected without corresponding DNS query: 91.189.91.43
Source: unknown TCP traffic detected without corresponding DNS query: 109.202.202.202
Source: unknown TCP traffic detected without corresponding DNS query: 89.190.156.145
Source: unknown TCP traffic detected without corresponding DNS query: 89.190.156.145
Source: unknown TCP traffic detected without corresponding DNS query: 91.189.91.42
Source: unknown TCP traffic detected without corresponding DNS query: 91.189.91.43
Source: unknown TCP traffic detected without corresponding DNS query: 89.190.156.145
Source: unknown TCP traffic detected without corresponding DNS query: 109.202.202.202
Source: unknown TCP traffic detected without corresponding DNS query: 91.189.91.42
Source: unknown TCP traffic detected without corresponding DNS query: 89.190.156.145
Source: unknown DNS traffic detected: queries for: kovey.mezo-api.xyz
Source: unknown Network traffic detected: HTTP traffic on port 43928 -> 443
Source: unknown Network traffic detected: HTTP traffic on port 42836 -> 443

System Summary

barindex
Source: epLN92K8RM.elf, type: SAMPLE Matched rule: Linux_Trojan_Gafgyt_28a2fe0c Author: unknown
Source: 6226.1.00007f71c4017000.00007f71c402c000.r-x.sdmp, type: MEMORY Matched rule: Linux_Trojan_Gafgyt_28a2fe0c Author: unknown
Source: Process Memory Space: epLN92K8RM.elf PID: 6226, type: MEMORYSTR Matched rule: Linux_Trojan_Gafgyt_28a2fe0c Author: unknown
Source: ELF static info symbol of initial sample .symtab present: no
Source: /tmp/epLN92K8RM.elf (PID: 6230) SIGKILL sent: pid: 1638, result: successful Jump to behavior
Source: epLN92K8RM.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: 6226.1.00007f71c4017000.00007f71c402c000.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: epLN92K8RM.elf PID: 6226, 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: mal84.troj.evad.linELF@0/1@11/0
Source: /usr/libexec/gsd-rfkill (PID: 6232) Directory: <invalid fd (9)>/.. Jump to behavior
Source: /usr/libexec/gsd-rfkill (PID: 6232) Directory: <invalid fd (8)>/.. Jump to behavior
Source: /lib/systemd/systemd-hostnamed (PID: 6237) Directory: <invalid fd (10)>/.. Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/1582/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/230/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/110/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/231/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/111/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/232/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/1579/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/112/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/233/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/113/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/234/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/1335/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/114/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/235/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/1334/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/1576/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/115/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/236/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/116/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/237/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/117/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/118/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/910/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/119/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/912/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/10/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/11/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/918/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/12/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/13/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/14/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/15/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/16/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/17/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/18/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/1594/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/120/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/121/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/1349/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/122/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/243/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/123/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/2/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/124/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/3/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/4/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/125/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/126/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/1344/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/1465/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/1586/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/127/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/6/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/248/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/128/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/249/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/1463/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/800/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/9/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/801/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/20/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/21/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/22/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/23/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/24/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/25/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/26/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/27/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/28/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/29/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/491/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/250/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/130/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/251/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/252/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/132/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/253/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/254/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/255/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/256/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/1599/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/257/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/1477/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/379/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/258/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/1476/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/259/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/1475/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/936/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/30/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/35/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/1494/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/260/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/261/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/141/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/262/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/263/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/264/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/144/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/265/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/266/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/267/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/1489/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/269/cmdline Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6230) File opened: /proc/270/cmdline Jump to behavior

Hooking and other Techniques for Hiding and Protection

barindex
Source: /tmp/epLN92K8RM.elf (PID: 6228) File: /tmp/epLN92K8RM.elf Jump to behavior
Source: /tmp/epLN92K8RM.elf (PID: 6226) Queries kernel information via 'uname': Jump to behavior
Source: /lib/systemd/systemd-hostnamed (PID: 6237) Queries kernel information via 'uname': Jump to behavior
Source: epLN92K8RM.elf, 6226.1.00005589d4c5d000.00005589d4d8b000.rw-.sdmp Binary or memory string: U!/etc/qemu-binfmt/arm
Source: epLN92K8RM.elf, 6226.1.00005589d4c5d000.00005589d4d8b000.rw-.sdmp Binary or memory string: /etc/qemu-binfmt/arm
Source: epLN92K8RM.elf, 6226.1.00007fff2dae0000.00007fff2db01000.rw-.sdmp Binary or memory string: /tmp/qemu-open.Z7l3T0
Source: epLN92K8RM.elf, 6226.1.00007fff2dae0000.00007fff2db01000.rw-.sdmp Binary or memory string: /usr/bin/qemu-arm
Source: epLN92K8RM.elf, 6226.1.00007fff2dae0000.00007fff2db01000.rw-.sdmp Binary or memory string: Fx86_64/usr/bin/qemu-arm/tmp/epLN92K8RM.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/epLN92K8RM.elf
Source: epLN92K8RM.elf, 6226.1.00007fff2dae0000.00007fff2db01000.rw-.sdmp Binary or memory string: U/tmp/qemu-open.Z7l3T0:

Stealing of Sensitive Information

barindex
Source: Yara match File source: epLN92K8RM.elf, type: SAMPLE
Source: Yara match File source: 6226.1.00007f71c4017000.00007f71c402c000.r-x.sdmp, type: MEMORY

Remote Access Functionality

barindex
Source: Yara match File source: epLN92K8RM.elf, type: SAMPLE
Source: Yara match File source: 6226.1.00007f71c4017000.00007f71c402c000.r-x.sdmp, type: MEMORY
  • No. of IPs < 25%
  • 25% < No. of IPs < 50%
  • 50% < No. of IPs < 75%
  • 75% < No. of IPs