mrblack | 646279a6d09af77e39604ccefcf6021752a6572316a91047f0341f08cd8f4d45

Analysis

max time kernel
149s
max time network
153s
platform
ubuntu-20.04_amd64
resource
ubuntu2004-amd64-20240418-en
resource tags

arch:amd64arch:i386image:ubuntu2004-amd64-20240418-enkernel:5.4.0-169-genericlocale:en-usos:ubuntu-20.04-amd64system
submitted
06-05-2024 01:34

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General

Target

6674baf9b5ee9baf415ae92ed69b522bf1367cceb60cfd57ae7bc4b8e0677a23.elf
Size

1.1MB
MD5

7d1343b3ab670b162fb2ce8854f01167
SHA1

de95e608dd0e97d5eca90b6b6d747465980d4857
SHA256

6674baf9b5ee9baf415ae92ed69b522bf1367cceb60cfd57ae7bc4b8e0677a23
SHA512

22ff942fcaabe8a63919a53bf68642dd45943ef3c24e558b18d51ca5c4c0209be653ec268f9d0f64b5634e9dd3e32f7eacdb746fd2263907c0f8f33d89dd91be
SSDEEP

24576:4vRE7caCfKGPqVEDNLFxKsfawI+gIGYuuCol7r:4vREKfPqVE5jKsfawRHGVo7r

Score

10^/10

mrblack antivm botnet persistence trojan

Malware Config

Signatures

MrBlack Trojan
IoT botnet which infects routers to be used for DDoS attacks.
trojan botnet mrblack

MrBlack trojan 1 IoCs

resource	yara_rule
behavioral1/files/fstream-4.dat	family_mrblack

Executes dropped EXE 2 IoCs

ioc	pid	Process
/usr/bin/bsd-port/knerl	1928	knerl
/usr/bin/pythno	1986	pythno

Modifies init.d 1 TTPs 2 IoCs

Adds/modifies system service, likely for persistence.

persistence

Boot or Logon Autostart Execution

T1547

description	ioc	Process
File opened for modification	/etc/init.d/VsystemsshMdt	6674baf9b5ee9baf415ae92ed69b522bf1367cceb60cfd57ae7bc4b8e0677a23.elf
File opened for modification	/etc/init.d/selinux	knerl

Reads system routing table 1 TTPs 1 IoCs

Gets active network interfaces from /proc virtual filesystem.

System Network Configuration Discovery

T1016

description	ioc	Process
File opened for reading	/proc/net/route	6674baf9b5ee9baf415ae92ed69b522bf1367cceb60cfd57ae7bc4b8e0677a23.elf

Write file to user bin folder 1 TTPs 9 IoCs

Hijack Execution Flow

T1574

description	ioc	Process
File opened for modification	/usr/bin/dpkgd/ps	cp
File opened for modification	/usr/bin/ps	cp
File opened for modification	/usr/bin/bsd-port/knerl.conf	6674baf9b5ee9baf415ae92ed69b522bf1367cceb60cfd57ae7bc4b8e0677a23.elf
File opened for modification	/usr/bin/bsd-port/udevd.conf	6674baf9b5ee9baf415ae92ed69b522bf1367cceb60cfd57ae7bc4b8e0677a23.elf
File opened for modification	/usr/bin/bsd-port/knerl	cp
File opened for modification	/usr/bin/bsd-port/knerl.conf	knerl
File opened for modification	/usr/bin/pythno	cp
File opened for modification	/usr/bin/dpkgd/lsof	cp
File opened for modification	/usr/bin/lsof	cp

Writes file to system bin folder 1 TTPs 2 IoCs

Hijack Execution Flow

T1574

description	ioc	Process
File opened for modification	/bin/lsof	cp
File opened for modification	/bin/ps	cp

Checks CPU configuration 1 TTPs 2 IoCs

Checks CPU information which indicate if the system is a virtual machine.

antivm

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
File opened for reading	/proc/cpuinfo	knerl
File opened for reading	/proc/cpuinfo	6674baf9b5ee9baf415ae92ed69b522bf1367cceb60cfd57ae7bc4b8e0677a23.elf

Reads system network configuration 1 TTPs 4 IoCs

Uses contents of /proc filesystem to enumerate network settings.

System Network Configuration Discovery

T1016

description	ioc	Process
File opened for reading	/proc/net/dev	6674baf9b5ee9baf415ae92ed69b522bf1367cceb60cfd57ae7bc4b8e0677a23.elf
File opened for reading	/proc/net/route	6674baf9b5ee9baf415ae92ed69b522bf1367cceb60cfd57ae7bc4b8e0677a23.elf
File opened for reading	/proc/net/arp	6674baf9b5ee9baf415ae92ed69b522bf1367cceb60cfd57ae7bc4b8e0677a23.elf
File opened for reading	/proc/net/dev	knerl

Reads runtime system information 24 IoCs

Reads data from /proc virtual filesystem.

description	ioc	Process
File opened for reading	/proc/filesystems	mkdir
File opened for reading	/proc/filesystems	mkdir
File opened for reading	/proc/sys/kernel/version	knerl
File opened for reading	/proc/filesystems	mkdir
File opened for reading	/proc/filesystems	cp
File opened for reading	/proc/filesystems	cp
File opened for reading	/proc/filesystems	cp
File opened for reading	/proc/filesystems	cp
File opened for reading	/proc/filesystems	mkdir
File opened for reading	/proc/sys/kernel/version	pythno
File opened for reading	/proc/meminfo	knerl
File opened for reading	/proc/cmdline	insmod
File opened for reading	/proc/filesystems	cp
File opened for reading	/proc/meminfo	6674baf9b5ee9baf415ae92ed69b522bf1367cceb60cfd57ae7bc4b8e0677a23.elf
File opened for reading	/proc/filesystems	cp
File opened for reading	/proc/cmdline	insmod
File opened for reading	/proc/filesystems	mkdir
File opened for reading	/proc/filesystems	cp
File opened for reading	/proc/sys/kernel/version	6674baf9b5ee9baf415ae92ed69b522bf1367cceb60cfd57ae7bc4b8e0677a23.elf
File opened for reading	/proc/stat	6674baf9b5ee9baf415ae92ed69b522bf1367cceb60cfd57ae7bc4b8e0677a23.elf
File opened for reading	/proc/filesystems	mkdir
File opened for reading	/proc/filesystems	mkdir
File opened for reading	/proc/filesystems	cp
File opened for reading	/proc/stat	knerl

Writes file to tmp directory 8 IoCs

Malware often drops required files in the /tmp directory.

description	ioc	Process
File opened for modification	/tmp/idus.log	pythno
File opened for modification	/tmp/notify.file	pythno
File opened for modification	/tmp/vga.conf	pythno
File opened for modification	/tmp/idus.log	6674baf9b5ee9baf415ae92ed69b522bf1367cceb60cfd57ae7bc4b8e0677a23.elf
File opened for modification	/tmp/apsh.conf	6674baf9b5ee9baf415ae92ed69b522bf1367cceb60cfd57ae7bc4b8e0677a23.elf
File opened for modification	/tmp/vga.conf	6674baf9b5ee9baf415ae92ed69b522bf1367cceb60cfd57ae7bc4b8e0677a23.elf
File opened for modification	/tmp/notify.file	6674baf9b5ee9baf415ae92ed69b522bf1367cceb60cfd57ae7bc4b8e0677a23.elf
File opened for modification	/tmp/conf.n	6674baf9b5ee9baf415ae92ed69b522bf1367cceb60cfd57ae7bc4b8e0677a23.elf

/tmp/6674baf9b5ee9baf415ae92ed69b522bf1367cceb60cfd57ae7bc4b8e0677a23.elf
/tmp/6674baf9b5ee9baf415ae92ed69b522bf1367cceb60cfd57ae7bc4b8e0677a23.elf
1⤵
- Modifies init.d
- Reads system routing table
- Write file to user bin folder
- Checks CPU configuration
- Reads system network configuration
- Reads runtime system information
- Writes file to tmp directory
PID:1487
- /bin/sh
  sh -c "ln -s /etc/init.d/VsystemsshMdt /etc/rc1.d/S97VsystemsshMdt"
  2⤵
  PID:1882
- - /usr/bin/ln
    ln -s /etc/init.d/VsystemsshMdt /etc/rc1.d/S97VsystemsshMdt
    3⤵
    PID:1883
- /bin/sh
  sh -c "ln -s /etc/init.d/VsystemsshMdt /etc/rc2.d/S97VsystemsshMdt"
  2⤵
  PID:1884
- - /usr/bin/ln
    ln -s /etc/init.d/VsystemsshMdt /etc/rc2.d/S97VsystemsshMdt
    3⤵
    PID:1885
- /bin/sh
  sh -c "ln -s /etc/init.d/VsystemsshMdt /etc/rc3.d/S97VsystemsshMdt"
  2⤵
  PID:1886
- - /usr/bin/ln
    ln -s /etc/init.d/VsystemsshMdt /etc/rc3.d/S97VsystemsshMdt
    3⤵
    PID:1887
- /bin/sh
  sh -c "ln -s /etc/init.d/VsystemsshMdt /etc/rc4.d/S97VsystemsshMdt"
  2⤵
  PID:1888
- - /usr/bin/ln
    ln -s /etc/init.d/VsystemsshMdt /etc/rc4.d/S97VsystemsshMdt
    3⤵
    PID:1889
- /bin/sh
  sh -c "ln -s /etc/init.d/VsystemsshMdt /etc/rc5.d/S97VsystemsshMdt"
  2⤵
  PID:1890
- - /usr/bin/ln
    ln -s /etc/init.d/VsystemsshMdt /etc/rc5.d/S97VsystemsshMdt
    3⤵
    PID:1891
- /bin/sh
  sh -c "mkdir -p /usr/bin/bsd-port"
  2⤵
  PID:1892
- - /usr/bin/mkdir
    mkdir -p /usr/bin/bsd-port
    3⤵
    - Reads runtime system information
    PID:1893
- /bin/sh
  sh -c "cp -f /tmp/6674baf9b5ee9baf415ae92ed69b522bf1367cceb60cfd57ae7bc4b8e0677a23.elf /usr/bin/bsd-port/knerl"
  2⤵
  PID:1894
- - /usr/bin/cp
    cp -f /tmp/6674baf9b5ee9baf415ae92ed69b522bf1367cceb60cfd57ae7bc4b8e0677a23.elf /usr/bin/bsd-port/knerl
    3⤵
    - Write file to user bin folder
    - Reads runtime system information
    PID:1895
- /bin/sh
  sh -c /usr/bin/bsd-port/knerl
  2⤵
  PID:1927
- - /usr/bin/bsd-port/knerl
    /usr/bin/bsd-port/knerl
    3⤵
    - Executes dropped EXE
    - Modifies init.d
    - Write file to user bin folder
    - Checks CPU configuration
    - Reads system network configuration
    - Reads runtime system information
    PID:1928
  - - /bin/sh
      sh -c "ln -s /etc/init.d/selinux /etc/rc1.d/S99selinux"
      4⤵
      PID:1972
    - - /usr/bin/ln
        
        ln -s /etc/init.d/selinux /etc/rc1.d/S99selinux
        5⤵
        
        PID:1973
  - - /bin/sh
      sh -c "ln -s /etc/init.d/selinux /etc/rc2.d/S99selinux"
      4⤵
      PID:1974
    - - /usr/bin/ln
        
        ln -s /etc/init.d/selinux /etc/rc2.d/S99selinux
        5⤵
        
        PID:1975
  - - /bin/sh
      sh -c "ln -s /etc/init.d/selinux /etc/rc3.d/S99selinux"
      4⤵
      PID:1976
    - - /usr/bin/ln
        
        ln -s /etc/init.d/selinux /etc/rc3.d/S99selinux
        5⤵
        
        PID:1977
  - - /bin/sh
      sh -c "ln -s /etc/init.d/selinux /etc/rc4.d/S99selinux"
      4⤵
      PID:1978
    - - /usr/bin/ln
        
        ln -s /etc/init.d/selinux /etc/rc4.d/S99selinux
        5⤵
        
        PID:1979
  - - /bin/sh
      sh -c "ln -s /etc/init.d/selinux /etc/rc5.d/S99selinux"
      4⤵
      PID:1980
    - - /usr/bin/ln
        
        ln -s /etc/init.d/selinux /etc/rc5.d/S99selinux
        5⤵
        
        PID:1981
  - - /bin/sh
      sh -c "mkdir -p /usr/bin/dpkgd"
      4⤵
      PID:1982
    - - /usr/bin/mkdir
        
        mkdir -p /usr/bin/dpkgd
        5⤵
        Reads runtime system information
        
        PID:1983
  - - /bin/sh
      sh -c "cp -f /bin/lsof /usr/bin/dpkgd/lsof"
      4⤵
      PID:1988
    - - /usr/bin/cp
        
        cp -f /bin/lsof /usr/bin/dpkgd/lsof
        5⤵
        Write file to user bin folder
        Reads runtime system information
        
        PID:1989
  - - /bin/sh
      sh -c "mkdir -p /bin"
      4⤵
      PID:1992
    - - /usr/bin/mkdir
        
        mkdir -p /bin
        5⤵
        Reads runtime system information
        
        PID:1993
  - - /bin/sh
      sh -c "cp -f /usr/bin/bsd-port/knerl /bin/lsof"
      4⤵
      PID:1994
    - - /usr/bin/cp
        
        cp -f /usr/bin/bsd-port/knerl /bin/lsof
        5⤵
        Writes file to system bin folder
        Reads runtime system information
        
        PID:1996
  - - /bin/sh
      sh -c "chmod 0755 /bin/lsof"
      4⤵
      PID:1999
    - - /usr/bin/chmod
        
        chmod 0755 /bin/lsof
        5⤵
        
        PID:2000
  - - /bin/sh
      sh -c "cp -f /bin/ps /usr/bin/dpkgd/ps"
      4⤵
      PID:2001
    - - /usr/bin/cp
        
        cp -f /bin/ps /usr/bin/dpkgd/ps
        5⤵
        Write file to user bin folder
        Reads runtime system information
        
        PID:2003
  - - /bin/sh
      sh -c "mkdir -p /bin"
      4⤵
      PID:2007
    - - /usr/bin/mkdir
        
        mkdir -p /bin
        5⤵
        Reads runtime system information
        
        PID:2008
  - - /bin/sh
      sh -c "cp -f /usr/bin/bsd-port/knerl /bin/ps"
      4⤵
      PID:2009
    - - /usr/bin/cp
        
        cp -f /usr/bin/bsd-port/knerl /bin/ps
        5⤵
        Writes file to system bin folder
        Reads runtime system information
        
        PID:2010
  - - /bin/sh
      sh -c "chmod 0755 /bin/ps"
      4⤵
      PID:2011
    - - /usr/bin/chmod
        
        chmod 0755 /bin/ps
        5⤵
        
        PID:2012
  - - /bin/sh
      sh -c "mkdir -p /usr/bin"
      4⤵
      PID:2013
    - - /usr/bin/mkdir
        
        mkdir -p /usr/bin
        5⤵
        Reads runtime system information
        
        PID:2014
  - - /bin/sh
      sh -c "cp -f /usr/bin/bsd-port/knerl /usr/bin/lsof"
      4⤵
      PID:2015
    - - /usr/bin/cp
        
        cp -f /usr/bin/bsd-port/knerl /usr/bin/lsof
        5⤵
        Write file to user bin folder
        Reads runtime system information
        
        PID:2016
  - - /bin/sh
      sh -c "chmod 0755 /usr/bin/lsof"
      4⤵
      PID:2017
    - - /usr/bin/chmod
        
        chmod 0755 /usr/bin/lsof
        5⤵
        
        PID:2018
  - - /bin/sh
      sh -c "mkdir -p /usr/bin"
      4⤵
      PID:2019
    - - /usr/bin/mkdir
        
        mkdir -p /usr/bin
        5⤵
        Reads runtime system information
        
        PID:2020
  - - /bin/sh
      sh -c "cp -f /usr/bin/bsd-port/knerl /usr/bin/ps"
      4⤵
      PID:2021
    - - /usr/bin/cp
        
        cp -f /usr/bin/bsd-port/knerl /usr/bin/ps
        5⤵
        Write file to user bin folder
        Reads runtime system information
        
        PID:2022
  - - /bin/sh
      sh -c "chmod 0755 /usr/bin/ps"
      4⤵
      PID:2023
    - - /usr/bin/chmod
        
        chmod 0755 /usr/bin/ps
        5⤵
        
        PID:2024
  - - /bin/sh
      sh -c "insmod /usr/lib/xpacket.ko"
      4⤵
      PID:2025
    - - /usr/sbin/insmod
        
        insmod /usr/lib/xpacket.ko
        5⤵
        Reads runtime system information
        
        PID:2026
- /bin/sh
  sh -c "mkdir -p /usr/bin"
  2⤵
  PID:1930
- - /usr/bin/mkdir
    mkdir -p /usr/bin
    3⤵
    - Reads runtime system information
    PID:1931
- /bin/sh
  sh -c "cp -f /tmp/6674baf9b5ee9baf415ae92ed69b522bf1367cceb60cfd57ae7bc4b8e0677a23.elf /usr/bin/pythno"
  2⤵
  PID:1932
- - /usr/bin/cp
    cp -f /tmp/6674baf9b5ee9baf415ae92ed69b522bf1367cceb60cfd57ae7bc4b8e0677a23.elf /usr/bin/pythno
    3⤵
    - Write file to user bin folder
    - Reads runtime system information
    PID:1933
- /bin/sh
  sh -c /usr/bin/pythno
  2⤵
  PID:1985
- - /usr/bin/pythno
    /usr/bin/pythno
    3⤵
    - Executes dropped EXE
    - Reads runtime system information
    - Writes file to tmp directory
    PID:1986
- /bin/sh
  sh -c "insmod /usr/lib/xpacket.ko"
  2⤵
  PID:1990
- - /usr/sbin/insmod
    insmod /usr/lib/xpacket.ko
    3⤵
    - Reads runtime system information
    PID:1991

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Hijack Execution Flow

T1574

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Hijack Execution Flow

T1574

Defense Evasion

Hijack Execution Flow

T1574

Virtualization/Sandbox Evasion

T1497

Credential Access

Discovery

System Network Configuration Discovery

T1016

Virtualization/Sandbox Evasion

T1497

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

/etc/init.d/VsystemsshMdt

Filesize
86B

MD5
62c50665d16111fd2bd429aee5e844c4

SHA1
a20470136573862ad0b81e68d092466cf76f40a6

SHA256
81561480ccebeb470642451dbf9e602dd0bc5e6819c1becf3f088e3816149e5b

SHA512
afbc70357c51fbc720ee93ae18f301cbcde8eb401618b5371f39e485f733176378f174d8252df39f3b03d2fdd81ca3ae9ddd974f47eb70d07a1d42b8cf4ed36b

Download Submit
/etc/init.d/selinux

Filesize
36B

MD5
caa27b819c9303446f702929874a00e8

SHA1
d24199c0e376edea3f822b215148cc0dc78364bf

SHA256
da9b535a14c6d9152857e211f14fb8da9056e84ba1b8d4dc27ab79c98264050b

SHA512
dcd9413eb2cb24d77f637edfc00ca0bb42229a1a3b0d84e29eff94a7b91aee6ee8c126c286a4b4103e01834d1c6aec9de09ffab3927e8de8015421005f31446e

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/tmp/idus.log

Filesize
4B

MD5
d68a18275455ae3eaa2c291eebb46e6d

SHA1
a93cf93db3ae6d491e1b4fc8c4e1d869daa36a33

SHA256
744b93f9950fc38dad705556931ea48193b99dcb191cc9bd77097f65fbe2f0b8

SHA512
987475606a8b24c3827f62779cb1d9d7e4ea9221297924d4788e1ec6a505737dc969bd8b8f03af3482d89ed6bd9b4d8ae8854417b8f636b6cb63962c96b0eb48

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/tmp/notify.file

Filesize
73B

MD5
0400ed517c2462909168771fe1319605

SHA1
43fa6a8c8f217caaa72e1a6490d10e1fb5f3c7a2

SHA256
1d1c633b317e28b55004bc325b33f4e466d08f26722d9b4618a3bb56971e0d99

SHA512
d3535288a9ca00df00b27142fbc00a0f54dc8488830511f9fb3763413639eec71441f748e578e0900c5b0323de6261983f5dc0e34ed38a5b102cca81efc4a29f

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/tmp/vga.conf

Filesize
4B

MD5
8a146f1a3da4700cbf03cdc55e2daae6

SHA1
62f6479a5eca39725798b1ee300bd8d5de3a4ae3

SHA256
cf23dc33d6aba13592a72190564ed18b2c0dae295f681ee0fddc4862f01225cf

SHA512
73a873bd9969ad6e4b30e037ae50daedb13d0b463c27eee76cb0ce5d6ebd1732eef890922c2943957a7e4d511d902b908a6845f86bd5152c17182df7a6b37620

Download Submit
/usr/bin/bsd-port/knerl

Filesize
1.1MB

MD5
7d1343b3ab670b162fb2ce8854f01167

SHA1
de95e608dd0e97d5eca90b6b6d747465980d4857

SHA256
6674baf9b5ee9baf415ae92ed69b522bf1367cceb60cfd57ae7bc4b8e0677a23

SHA512
22ff942fcaabe8a63919a53bf68642dd45943ef3c24e558b18d51ca5c4c0209be653ec268f9d0f64b5634e9dd3e32f7eacdb746fd2263907c0f8f33d89dd91be

Download Submit
/usr/bin/dpkgd/lsof

Filesize
171KB

MD5
061386937ec7acf924438a2643a32be0

SHA1
01a044b9e58839bea3e58c66cb32acc16241bf91

SHA256
8a26bbae9eb85aa98ef29cfe5b0a291234db6eb394c3e0c2841983dcf7dda959

SHA512
2de2e56ac4c32f47b4a1945ccfb0db378e6d59019ee8004e3e5d2ec8935efb5aa8ee14b8a0b21c61a267e195d42a3232a6dcade8720de06118fd579277f59db7

Download Submit
/usr/bin/dpkgd/ps

Filesize
134KB

MD5
d194576b899af45b1d2a448612ec21e5

SHA1
492f7d8f28cd4397ce22fcf0d8bf3304ea93465a

SHA256
a8cf81f3a1137c999c3cf336507ce120b3065e633ade01db6280d427b7d986ca

SHA512
b323babd9580b91772cde29c9f22ae75b27f5ce8ce0268a48ca41713c3545dd72409932a5c48f6af66ac6e43127eb5461d1f686bd667fa1b0e56a1564db3c539

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads