mrblack | 036a2f04ab56b5e7098c7d866eb21307011b812f126793159be1c853a6a54796

Analysis

max time kernel
149s
max time network
153s
platform
ubuntu-18.04_amd64
resource
ubuntu1804-amd64-20231215-en
resource tags

arch:amd64arch:i386image:ubuntu1804-amd64-20231215-enkernel:4.15.0-213-genericlocale:en-usos:ubuntu-18.04-amd64system
submitted
19-02-2024 15:10

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General

Target

cb084b73d800c005e5a3cf4f299f032a.elf
Size

1.2MB
MD5

cb084b73d800c005e5a3cf4f299f032a
SHA1

770fca135b25594e77480cdca7116366be2ba91d
SHA256

036a2f04ab56b5e7098c7d866eb21307011b812f126793159be1c853a6a54796
SHA512

1b7476baa62f8388f933e2e15473bca928abf0d1128d551ca21a8d1b6615b04f2660f77bcf406df939d31c9916d42900a5c3dec50ebfa40ce1340ae545e41234
SSDEEP

24576:e845rGHu6gVJKG75oFpA0VWeX4B2y1q2rJp0:745vRVJKGtSA0VWeoYu9p0

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/getty	1638	getty
/usr/bin/.sshd	1662	.sshd

Checks CPU configuration 1 TTPs 1 IoCs

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

antivm

Virtualization/Sandbox Evasion

T1497

description	ioc
File opened for reading	/proc/cpuinfo

Modifies init.d 1 TTPs 2 IoCs

Adds/modifies system service, likely for persistence.

persistence

Boot or Logon Autostart Execution

T1547

description	ioc
File opened for modification	/etc/init.d/DbSecuritySpt
File opened for modification	/etc/init.d/selinux

Reads system routing table 1 TTPs 1 IoCs

Gets active network interfaces from /proc virtual filesystem.

System Network Configuration Discovery

T1016

description	ioc
File opened for reading	/proc/net/route

Write file to user bin folder 1 TTPs 9 IoCs

Hijack Execution Flow

T1574

description	ioc	Process
File opened for modification	/usr/bin/bsd-port/conf.n	Process not Found
File opened for modification	/usr/bin/bsd-port/getty.lock	Process not Found
File opened for modification	/usr/bin/bsd-port/udevd.lock	Process not Found
File opened for modification	/usr/bin/dpkgd/ps	cp
File opened for modification	/usr/bin/dpkgd/ss	cp
File opened for modification	/usr/bin/dpkgd/lsof	cp
File opened for modification	/usr/bin/lsof	cp
File opened for modification	/usr/bin/bsd-port/getty	cp
File opened for modification	/usr/bin/.sshd	cp

Writes file to system bin folder 1 TTPs 2 IoCs

Hijack Execution Flow

T1574

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

Reads system network configuration 1 TTPs 3 IoCs

Uses contents of /proc filesystem to enumerate network settings.

System Network Configuration Discovery

T1016

description	ioc
File opened for reading	/proc/net/dev
File opened for reading	/proc/net/route
File opened for reading	/proc/net/arp

Reads runtime system information 23 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/filesystems	cp
File opened for reading	/proc/filesystems	cp
File opened for reading	/proc/filesystems	mkdir
File opened for reading	/proc/filesystems	cp
File opened for reading	/proc/cmdline	insmod
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/filesystems	mkdir
File opened for reading	/proc/stat	Process not Found
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/filesystems	cp
File opened for reading	/proc/meminfo	Process not Found
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/filesystems	mkdir
File opened for reading	/proc/filesystems	mkdir
File opened for reading	/proc/cmdline	insmod

Writes file to tmp directory 5 IoCs

Malware often drops required files in the /tmp directory.

description	ioc
File opened for modification	/tmp/moni.lod
File opened for modification	/tmp/bill.lock
File opened for modification	/tmp/gates.lod
File opened for modification	/tmp/notify.file
File opened for modification	/tmp/conf.n

/tmp/cb084b73d800c005e5a3cf4f299f032a.elf
/tmp/cb084b73d800c005e5a3cf4f299f032a.elf
1⤵
PID:1597

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc1.d/S97DbSecuritySpt"
1⤵
PID:1620
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc1.d/S97DbSecuritySpt
  2⤵
  PID:1621

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc2.d/S97DbSecuritySpt"
1⤵
PID:1622
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc2.d/S97DbSecuritySpt
  2⤵
  PID:1623

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc3.d/S97DbSecuritySpt"
1⤵
PID:1624
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc3.d/S97DbSecuritySpt
  2⤵
  PID:1625

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc4.d/S97DbSecuritySpt"
1⤵
PID:1626
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc4.d/S97DbSecuritySpt
  2⤵
  PID:1627

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc5.d/S97DbSecuritySpt"
1⤵
PID:1628
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc5.d/S97DbSecuritySpt
  2⤵
  PID:1629

/bin/sh
sh -c "mkdir -p /usr/bin/bsd-port"
1⤵
PID:1630
- /bin/mkdir
  mkdir -p /usr/bin/bsd-port
  2⤵
  - Reads runtime system information
  PID:1631

/bin/sh
sh -c "mkdir -p /usr/bin/bsd-port"
1⤵
PID:1632
- /bin/mkdir
  mkdir -p /usr/bin/bsd-port
  2⤵
  - Reads runtime system information
  PID:1633

/bin/sh
sh -c "cp -f /tmp/cb084b73d800c005e5a3cf4f299f032a.elf /usr/bin/bsd-port/getty"
1⤵
PID:1634
- /bin/cp
  cp -f /tmp/cb084b73d800c005e5a3cf4f299f032a.elf /usr/bin/bsd-port/getty
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1635

/bin/sh
sh -c /usr/bin/bsd-port/getty
1⤵
PID:1637
- /usr/bin/bsd-port/getty
  /usr/bin/bsd-port/getty
  2⤵
  - Executes dropped EXE
  PID:1638

/bin/sh
sh -c "mkdir -p /usr/bin"
1⤵
PID:1640
- /bin/mkdir
  mkdir -p /usr/bin
  2⤵
  - Reads runtime system information
  PID:1641

/bin/sh
sh -c "mkdir -p /usr/bin"
1⤵
PID:1642
- /bin/mkdir
  mkdir -p /usr/bin
  2⤵
  - Reads runtime system information
  PID:1643

/bin/sh
sh -c "cp -f /tmp/cb084b73d800c005e5a3cf4f299f032a.elf /usr/bin/.sshd"
1⤵
PID:1644
- /bin/cp
  cp -f /tmp/cb084b73d800c005e5a3cf4f299f032a.elf /usr/bin/.sshd
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1645

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc1.d/S99selinux"
1⤵
PID:1646
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc1.d/S99selinux
  2⤵
  PID:1647

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc2.d/S99selinux"
1⤵
PID:1648
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc2.d/S99selinux
  2⤵
  PID:1649

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc3.d/S99selinux"
1⤵
PID:1650
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc3.d/S99selinux
  2⤵
  PID:1651

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc4.d/S99selinux"
1⤵
PID:1652
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc4.d/S99selinux
  2⤵
  PID:1653

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc5.d/S99selinux"
1⤵
PID:1654
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc5.d/S99selinux
  2⤵
  PID:1655

/bin/sh
sh -c "mkdir -p /usr/bin/dpkgd"
1⤵
PID:1656
- /bin/mkdir
  mkdir -p /usr/bin/dpkgd
  2⤵
  - Reads runtime system information
  PID:1657

/bin/sh
sh -c "cp -f /bin/ps /usr/bin/dpkgd/ps"
1⤵
PID:1658
- /bin/cp
  cp -f /bin/ps /usr/bin/dpkgd/ps
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1659

/bin/sh
sh -c /usr/bin/.sshd
1⤵
PID:1661
- /usr/bin/.sshd
  /usr/bin/.sshd
  2⤵
  - Executes dropped EXE
  PID:1662

/bin/sh
sh -c "mkdir -p /bin"
1⤵
PID:1663
- /bin/mkdir
  mkdir -p /bin
  2⤵
  - Reads runtime system information
  PID:1664

/bin/sh
sh -c "mkdir -p /bin"
1⤵
PID:1665
- /bin/mkdir
  mkdir -p /bin
  2⤵
  - Reads runtime system information
  PID:1666

/bin/sh
sh -c "cp -f /usr/bin/bsd-port/getty /bin/ps"
1⤵
PID:1667
- /bin/cp
  cp -f /usr/bin/bsd-port/getty /bin/ps
  2⤵
  - Writes file to system bin folder
  - Reads runtime system information
  PID:1668

/bin/sh
sh -c "chmod 0755 /bin/ps"
1⤵
PID:1669
- /bin/chmod
  chmod 0755 /bin/ps
  2⤵
  PID:1670

/bin/sh
sh -c "cp -f /bin/ss /usr/bin/dpkgd/ss"
1⤵
PID:1671
- /bin/cp
  cp -f /bin/ss /usr/bin/dpkgd/ss
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1672

/bin/sh
sh -c "mkdir -p /bin"
1⤵
PID:1673
- /bin/mkdir
  mkdir -p /bin
  2⤵
  - Reads runtime system information
  PID:1674

/bin/sh
sh -c "mkdir -p /bin"
1⤵
PID:1675
- /bin/mkdir
  mkdir -p /bin
  2⤵
  - Reads runtime system information
  PID:1676

/bin/sh
sh -c "cp -f /usr/bin/bsd-port/getty /bin/ss"
1⤵
PID:1677
- /bin/cp
  cp -f /usr/bin/bsd-port/getty /bin/ss
  2⤵
  - Writes file to system bin folder
  - Reads runtime system information
  PID:1678

/bin/sh
sh -c "chmod 0755 /bin/ss"
1⤵
PID:1679
- /bin/chmod
  chmod 0755 /bin/ss
  2⤵
  PID:1680

/bin/sh
sh -c "cp -f /usr/bin/lsof /usr/bin/dpkgd/lsof"
1⤵
PID:1681
- /bin/cp
  cp -f /usr/bin/lsof /usr/bin/dpkgd/lsof
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1682

/bin/sh
sh -c "mkdir -p /usr/bin"
1⤵
PID:1683
- /bin/mkdir
  mkdir -p /usr/bin
  2⤵
  - Reads runtime system information
  PID:1684

/bin/sh
sh -c "mkdir -p /usr/bin"
1⤵
PID:1685
- /bin/mkdir
  mkdir -p /usr/bin
  2⤵
  - Reads runtime system information
  PID:1686

/bin/sh
sh -c "cp -f /usr/bin/bsd-port/getty /usr/bin/lsof"
1⤵
PID:1687
- /bin/cp
  cp -f /usr/bin/bsd-port/getty /usr/bin/lsof
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1688

/bin/sh
sh -c "chmod 0755 /usr/bin/lsof"
1⤵
PID:1689
- /bin/chmod
  chmod 0755 /usr/bin/lsof
  2⤵
  PID:1690

/bin/sh
sh -c "insmod /usr/bin/bsd-port/xpacket.ko"
1⤵
PID:1693
- /sbin/insmod
  insmod /usr/bin/bsd-port/xpacket.ko
  2⤵
  - Reads runtime system information
  PID:1694

/bin/sh
sh -c "insmod /tmp/xpacket.ko"
1⤵
PID:1704
- /sbin/insmod
  insmod /tmp/xpacket.ko
  2⤵
  - Reads runtime system information
  PID:1705

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/DbSecuritySpt

Filesize
54B

MD5
35312a5ff7698f985920a95cb84dda44

SHA1
661601935430b7305875b58ceb35b3720266fcff

SHA256
ae1887348e10ffa3ad3e9fe75827ae07bba7fdbac124cc578dd61edb2284edd8

SHA512
81f684253a86909c471be22462f4fc9c6e888a9b5e119c4257a3bd9dc4a0f7080e1a8b55db8e98e7e50268ac63fde1f5ab88d7266ee8223aeb06175c4770b76e

Download Submit
/tmp/gates.lod

Filesize
4B

MD5
9c19a2aa1d84e04b0bd4bc888792bd1e

SHA1
037880d210451b590c3a5229ea350645724e7e15

SHA256
191024c47d6c2b3c24a570326b7e29f09652ec8bc2bb1779d95783e8753d12db

SHA512
fbc7830e289b19696b7b6e01ae6d7e5403d144d417e380e47c29ea17db59c765ae7aa4a47cf885b6af0df831a8c98d5f99a40c35d121854ba273dd4afab24f93

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/tmp/moni.lod

Filesize
4B

MD5
8303a79b1e19a194f1875981be5bdb6f

SHA1
2bd746386e7303c37c516ce228d22b96e3bac1f5

SHA256
70399d63b169b1ae4b8c6e7ae9a75df6dbf0d7776e55545bdf6c46c97ef59185

SHA512
88cd9d500192656aadde9359332fcb3d623536fb0ec4c2b9baa06c385909c1e235bc01b48a826ab30d640787a9c39397b1ca61e07770b7ee49d684fbccbeb71b

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/tmp/notify.file

Filesize
41B

MD5
b6126e27d553bb8ca4adaf684bc0deae

SHA1
2c5371f5391828b3be3234213ad48b2ac61309c2

SHA256
c82a39dc799a5791c185ac3a3653168a6438df97630a469ac920c6cd7499b714

SHA512
4c2039a3b83bbd8085972be5a11c9d5fce761a6320d3dcc512099be84e959d3037d906b2c3016502b95154e4c0be70bc99d1917a4fa2e6264501e1c671b466a0

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/usr/bin/bsd-port/conf.n

Filesize
73B

MD5
bc3d1eda60efd931e11fa4f15262756b

SHA1
a3bee4d06049a6e4445e4468ddfbb672770aa633

SHA256
781d3443e6433c0579b2336d907a8023bc7b131812572b95701153bcc048ff8f

SHA512
07809620ff0662a6279d1f88caef5f9d14ebfb994aa13d305e8613967be42a7628b5f196dc2745404144d6ee0ba82f0d0b4243d452ee4488b1ae738c87ed2911

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/usr/bin/bsd-port/getty

Filesize
1.2MB

MD5
cb084b73d800c005e5a3cf4f299f032a

SHA1
770fca135b25594e77480cdca7116366be2ba91d

SHA256
036a2f04ab56b5e7098c7d866eb21307011b812f126793159be1c853a6a54796

SHA512
1b7476baa62f8388f933e2e15473bca928abf0d1128d551ca21a8d1b6615b04f2660f77bcf406df939d31c9916d42900a5c3dec50ebfa40ce1340ae545e41234

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/usr/bin/dpkgd/lsof

Filesize
159KB

MD5
e093dc78225e2a0a25e3b137c1c1e442

SHA1
c29497cfaae729eb576875e4fdfa400640ab16be

SHA256
1190f4dbc7be174de8fd4096c9bf7a28eebfac937d308b7cc533be4a1240d26e

SHA512
fe1cc7a65327732eaaee89f427c10239ba822430e34177842f4681068d78d404b1830d808a2a71b1efcc5f126c6d8c053512237421173aaa150e215a672da6f0

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/usr/bin/dpkgd/ps

Filesize
130KB

MD5
558edc26f8a38fa9788220b9af8a73e7

SHA1
3024d44e580e9c67f32f6c585d50e2a6cc9a7cac

SHA256
b76435c80333d2c1fd18e0e7682f1c9dfb5da8d507e93e3c416f54b481c428d5

SHA512
edaa425b441044f015e8f68fffa1664e42372d00dd0e7b0924d24ce947aa8e5f96b3bdc326fa2f8b978e3fcf638a1ceca45a223735db73f1607df66990feb56f

Download Submit
/usr/bin/dpkgd/ss

Filesize
136KB

MD5
1dc929b5f2cd12fe6a2fe71140d2a9e3

SHA1
f9995a92bb201b1b7738a39a38570ef0c40b52d2

SHA256
418aae1da62554afe9f260866267af328fd761b3fd6f90f0ea53d543e2fefc38

SHA512
fbed011c595084548db440dfbe485b7d27032a44a6ae9e141fe43f31c8c524ff9347135ab035deb441fca99e5a3794f7bb9194f148aa2f60f1547a7c67d47373

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads