Linux Analysis Report
yakov.arm5.elf

Overview

General Information

Sample name: yakov.arm5.elf
Analysis ID: 1524336
MD5: 934879d4ec9352a2f9273d64defa663d
SHA1: d84fddd113c975576160514622a7327663a38a49
SHA256: 030e822dfc8c669f8c4f6e0b7129b20272ec65f076a41df2d745bedb7a77cfb7
Tags: botnetelfyakovYakuzauser-NDA0E
Infos:

Detection

Mirai
Score: 68
Range: 0 - 100
Whitelisted: false

Signatures

Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for submitted file
Yara detected Mirai
Sample is packed with UPX
ELF contains segments with high entropy indicating compressed/encrypted content
Executes the "rm" command used to delete files or directories
Sample contains only a LOAD segment without any section mappings
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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Multi AV Scanner detection for submitted file
Source: yakov.arm5.elf ReversingLabs: Detection: 32%
Source: yakov.arm5.elf String found in binary or memory: http://upx.sf.net

System Summary
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Malicious sample detected (through community Yara rule)
Source: 5425.1.00007f26e0017000.00007f26e0023000.r-x.sdmp, type: MEMORY Matched rule: Linux_Trojan_Gafgyt_28a2fe0c Author: unknown
Source: 5425.1.00007f26e0017000.00007f26e0023000.r-x.sdmp, type: MEMORY Matched rule: Linux_Trojan_Gafgyt_ea92cca8 Author: unknown
Source: Process Memory Space: yakov.arm5.elf PID: 5425, type: MEMORYSTR Matched rule: Linux_Trojan_Gafgyt_28a2fe0c Author: unknown
Source: Process Memory Space: yakov.arm5.elf PID: 5425, type: MEMORYSTR Matched rule: Linux_Trojan_Gafgyt_ea92cca8 Author: unknown
Sample contains only a LOAD segment without any section mappings
Source: LOAD without section mappings Program segment: 0x8000
Yara signature match
Source: 5425.1.00007f26e0017000.00007f26e0023000.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: 5425.1.00007f26e0017000.00007f26e0023000.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: yakov.arm5.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: yakov.arm5.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: mal68.troj.evad.linELF@0/0@0/0

Data Obfuscation
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Sample is packed with UPX
Source: initial sample String containing UPX found: $Info: This file is packed with the UPX executable packer http://upx.sf.net $
Source: initial sample String containing UPX found: $Info: This file is packed with the UPX executable packer http://upx.sf.net $
Source: initial sample String containing UPX found: $Id: UPX 3.94 Copyright (C) 1996-2017 the UPX Team. All Rights Reserved. $
Executes the "rm" command used to delete files or directories
Source: /usr/bin/dash (PID: 5411) Rm executable: /usr/bin/rm -> rm -f /tmp/tmp.vKImhNH2RL /tmp/tmp.sGauTfuSqX /tmp/tmp.2IbEI6RwHG Jump to behavior
Source: /usr/bin/dash (PID: 5412) Rm executable: /usr/bin/rm -> rm -f /tmp/tmp.vKImhNH2RL /tmp/tmp.sGauTfuSqX /tmp/tmp.2IbEI6RwHG Jump to behavior
ELF contains segments with high entropy indicating compressed/encrypted content
Source: yakov.arm5.elf Submission file: segment LOAD with 7.9151 entropy (max. 8.0)
Uses the "uname" system call to query kernel version information (possible evasion)
Source: /tmp/yakov.arm5.elf (PID: 5425) Queries kernel information via 'uname': Jump to behavior
Source: yakov.arm5.elf, 5425.1.000055c01890b000.000055c018ab9000.rw-.sdmp Binary or memory string: U!/etc/qemu-binfmt/arm
Source: yakov.arm5.elf, 5425.1.00007ffd5e372000.00007ffd5e393000.rw-.sdmp Binary or memory string: x86_64/usr/bin/qemu-arm/tmp/yakov.arm5.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/yakov.arm5.elf
Source: yakov.arm5.elf, 5425.1.000055c01890b000.000055c018ab9000.rw-.sdmp Binary or memory string: /etc/qemu-binfmt/arm
Source: yakov.arm5.elf, 5425.1.00007ffd5e372000.00007ffd5e393000.rw-.sdmp Binary or memory string: /usr/bin/qemu-arm

Stealing of Sensitive Information
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Yara detected Mirai
Source: Yara match File source: 5425.1.00007f26e0017000.00007f26e0023000.r-x.sdmp, type: MEMORY
Source: Yara match File source: Process Memory Space: yakov.arm5.elf PID: 5425, type: MEMORYSTR

Remote Access Functionality
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Yara detected Mirai
Source: Yara match File source: 5425.1.00007f26e0017000.00007f26e0023000.r-x.sdmp, type: MEMORY
Source: Yara match File source: Process Memory Space: yakov.arm5.elf PID: 5425, type: MEMORYSTR

No Screenshots

⊘No contacted IP infos