mrblack | 551b48e425dcf4337ee023ad65a871123d172e43fabbc965252f5a2e69d0bd4a

Analysis

max time kernel
153s
max time network
131s
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
22-12-2023 09:48

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General

Target

8285f35183f0341b8dfe425b7348411d
Size

1.2MB
MD5

8285f35183f0341b8dfe425b7348411d
SHA1

44e569a191a5d7bd720c7af06c2fd81a501a245b
SHA256

551b48e425dcf4337ee023ad65a871123d172e43fabbc965252f5a2e69d0bd4a
SHA512

d9708bdf6e552f1fca816432f1f9a7d4b3ff8517fe2e18b3586c732a411262920743435f19a250f112ac829633f8370bb16de24bf2ec4692777293d97bbb6b4f
SSDEEP

24576:e845rlHu6gVJKG75oFpA0VWqX4G2y1q2rJp0:745wRVJKGtSA0VWqoVu9p0

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	1570	getty
/usr/bin/.sshd	1594	.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/selinux
File opened for modification	/etc/init.d/DbSecuritySpt

Write file to user bin folder 1 TTPs 8 IoCs

Hijack Execution Flow

T1574

description	ioc	Process
File opened for modification	/usr/bin/bsd-port/udevd.lock	Process not Found
File opened for modification	/usr/bin/bsd-port/getty	cp
File opened for modification	/usr/bin/.sshd	cp
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.lock	Process not Found

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 1 IoCs

Uses contents of /proc filesystem to enumerate network settings.

System Network Configuration Discovery

T1016

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

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/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/filesystems	mkdir
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/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/meminfo	Process not Found
File opened for reading	/proc/cmdline	insmod
File opened for reading	/proc/filesystems	mkdir
File opened for reading	/proc/filesystems	mkdir
File opened for reading	/proc/filesystems	mkdir
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/filesystems	mkdir

Writes file to tmp directory 4 IoCs

Malware often drops required files in the /tmp directory.

description	ioc
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/moni.lod

/tmp/8285f35183f0341b8dfe425b7348411d
/tmp/8285f35183f0341b8dfe425b7348411d
1⤵
PID:1534

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc1.d/S97DbSecuritySpt"
1⤵
PID:1542
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc1.d/S97DbSecuritySpt
  2⤵
  PID:1543

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc2.d/S97DbSecuritySpt"
1⤵
PID:1544
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc2.d/S97DbSecuritySpt
  2⤵
  PID:1545

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc3.d/S97DbSecuritySpt"
1⤵
PID:1546
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc3.d/S97DbSecuritySpt
  2⤵
  PID:1547

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc4.d/S97DbSecuritySpt"
1⤵
PID:1548
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc4.d/S97DbSecuritySpt
  2⤵
  PID:1549

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc5.d/S97DbSecuritySpt"
1⤵
PID:1550
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc5.d/S97DbSecuritySpt
  2⤵
  PID:1551

/bin/sh
sh -c "mkdir -p /usr/bin/bsd-port"
1⤵
PID:1562
- /bin/mkdir
  mkdir -p /usr/bin/bsd-port
  2⤵
  - Reads runtime system information
  PID:1563

/bin/sh
sh -c "mkdir -p /usr/bin/bsd-port"
1⤵
PID:1564
- /bin/mkdir
  mkdir -p /usr/bin/bsd-port
  2⤵
  - Reads runtime system information
  PID:1565

/bin/sh
sh -c "cp -f /tmp/8285f35183f0341b8dfe425b7348411d /usr/bin/bsd-port/getty"
1⤵
PID:1566
- /bin/cp
  cp -f /tmp/8285f35183f0341b8dfe425b7348411d /usr/bin/bsd-port/getty
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1567

/bin/sh
sh -c /usr/bin/bsd-port/getty
1⤵
PID:1569
- /usr/bin/bsd-port/getty
  /usr/bin/bsd-port/getty
  2⤵
  - Executes dropped EXE
  PID:1570

/bin/sh
sh -c "mkdir -p /usr/bin"
1⤵
PID:1572
- /bin/mkdir
  mkdir -p /usr/bin
  2⤵
  - Reads runtime system information
  PID:1573

/bin/sh
sh -c "mkdir -p /usr/bin"
1⤵
PID:1574
- /bin/mkdir
  mkdir -p /usr/bin
  2⤵
  - Reads runtime system information
  PID:1575

/bin/sh
sh -c "cp -f /tmp/8285f35183f0341b8dfe425b7348411d /usr/bin/.sshd"
1⤵
PID:1576
- /bin/cp
  cp -f /tmp/8285f35183f0341b8dfe425b7348411d /usr/bin/.sshd
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1577

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc1.d/S99selinux"
1⤵
PID:1578
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc1.d/S99selinux
  2⤵
  PID:1579

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc2.d/S99selinux"
1⤵
PID:1580
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc2.d/S99selinux
  2⤵
  PID:1581

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc3.d/S99selinux"
1⤵
PID:1582
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc3.d/S99selinux
  2⤵
  PID:1583

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc4.d/S99selinux"
1⤵
PID:1584
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc4.d/S99selinux
  2⤵
  PID:1585

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc5.d/S99selinux"
1⤵
PID:1586
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc5.d/S99selinux
  2⤵
  PID:1587

/bin/sh
sh -c "mkdir -p /usr/bin/dpkgd"
1⤵
PID:1588
- /bin/mkdir
  mkdir -p /usr/bin/dpkgd
  2⤵
  - Reads runtime system information
  PID:1589

/bin/sh
sh -c "cp -f /bin/ps /usr/bin/dpkgd/ps"
1⤵
PID:1590
- /bin/cp
  cp -f /bin/ps /usr/bin/dpkgd/ps
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1591

/bin/sh
sh -c /usr/bin/.sshd
1⤵
PID:1593
- /usr/bin/.sshd
  /usr/bin/.sshd
  2⤵
  - Executes dropped EXE
  PID:1594

/bin/sh
sh -c "mkdir -p /bin"
1⤵
PID:1595
- /bin/mkdir
  mkdir -p /bin
  2⤵
  - Reads runtime system information
  PID:1596

/bin/sh
sh -c "mkdir -p /bin"
1⤵
PID:1597
- /bin/mkdir
  mkdir -p /bin
  2⤵
  - Reads runtime system information
  PID:1598

/bin/sh
sh -c "cp -f /usr/bin/bsd-port/getty /bin/ps"
1⤵
PID:1599
- /bin/cp
  cp -f /usr/bin/bsd-port/getty /bin/ps
  2⤵
  - Writes file to system bin folder
  - Reads runtime system information
  PID:1600

/bin/sh
sh -c "chmod 0755 /bin/ps"
1⤵
PID:1603
- /bin/chmod
  chmod 0755 /bin/ps
  2⤵
  PID:1604

/bin/sh
sh -c "cp -f /bin/ss /usr/bin/dpkgd/ss"
1⤵
PID:1605
- /bin/cp
  cp -f /bin/ss /usr/bin/dpkgd/ss
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1606

/bin/sh
sh -c "mkdir -p /bin"
1⤵
PID:1607
- /bin/mkdir
  mkdir -p /bin
  2⤵
  - Reads runtime system information
  PID:1608

/bin/sh
sh -c "mkdir -p /bin"
1⤵
PID:1609
- /bin/mkdir
  mkdir -p /bin
  2⤵
  - Reads runtime system information
  PID:1610

/bin/sh
sh -c "cp -f /usr/bin/bsd-port/getty /bin/ss"
1⤵
PID:1611
- /bin/cp
  cp -f /usr/bin/bsd-port/getty /bin/ss
  2⤵
  - Writes file to system bin folder
  - Reads runtime system information
  PID:1612

/bin/sh
sh -c "chmod 0755 /bin/ss"
1⤵
PID:1613
- /bin/chmod
  chmod 0755 /bin/ss
  2⤵
  PID:1614

/bin/sh
sh -c "cp -f /usr/bin/lsof /usr/bin/dpkgd/lsof"
1⤵
PID:1615
- /bin/cp
  cp -f /usr/bin/lsof /usr/bin/dpkgd/lsof
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1616

/bin/sh
sh -c "mkdir -p /usr/bin"
1⤵
PID:1617
- /bin/mkdir
  mkdir -p /usr/bin
  2⤵
  - Reads runtime system information
  PID:1618

/bin/sh
sh -c "mkdir -p /usr/bin"
1⤵
PID:1619
- /bin/mkdir
  mkdir -p /usr/bin
  2⤵
  - Reads runtime system information
  PID:1620

/bin/sh
sh -c "cp -f /usr/bin/bsd-port/getty /usr/bin/lsof"
1⤵
PID:1621
- /bin/cp
  cp -f /usr/bin/bsd-port/getty /usr/bin/lsof
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1622

/bin/sh
sh -c "chmod 0755 /usr/bin/lsof"
1⤵
PID:1623
- /bin/chmod
  chmod 0755 /usr/bin/lsof
  2⤵
  PID:1624

/bin/sh
sh -c "insmod /tmp/xpacket.ko"
1⤵
PID:1625
- /sbin/insmod
  insmod /tmp/xpacket.ko
  2⤵
  - Reads runtime system information
  PID:1626

/bin/sh
sh -c "insmod /usr/bin/bsd-port/xpacket.ko"
1⤵
PID:1627
- /sbin/insmod
  insmod /usr/bin/bsd-port/xpacket.ko
  2⤵
  - Reads runtime system information
  PID:1628

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
50B

MD5
3eb4c7d11f445ce08c262c9ae66d1eb3

SHA1
bbca18f1bd396b6b9b1522fb00ea81786540015e

SHA256
344f0c0b9d6bb04ab4eaa407054a02214c6f19dc87c965a2f6b9def7685865ce

SHA512
5a3d05beb6c73bfed1f1a117a094fde8d791f768432280f17724f44e3138c015b1481c3a36c26dee65c4569033eeeb296360eca099b0c4de347bd4904460c84c

Download Submit
/etc/init.d/selinux

Filesize
36B

MD5
993cc15058142d96c3daf7852c3d5ee8

SHA1
0950b8b391b04dd3895ea33cd3141543ebd2525d

SHA256
8171d077918611803d93088409f220c66fae1c670b297e1aa5d8cbd548ce9208

SHA512
0c4256c00a3710f97e92581b552682b36b62afc35fe72622c491323c618c19ea62611ac04ccafc3dfcde2254a2ebbd93b69b66795b16e36332293bed83adb928

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/tmp/gates.lod

Filesize
4B

MD5
748ba69d3e8d1af87f84fee909eef339

SHA1
64738e27dc960ebdc22143dd8ea4b16b74029c8a

SHA256
7ab74ac64fd9a732609f768e00ca317591dbe8d6c340bc4d848fb1a79fa00d97

SHA512
4f2379cb25c3fccd3995c9040959208ef2fa3d779b57329d28a819fd1e67801c08937a0e719f35538bf1e4b6ce276764021b9e1097efd8bab7a48bdfc626792d

Download Submit
/tmp/moni.lod

Filesize
4B

MD5
c559da2ba967eb820766939a658022c8

SHA1
f161352bf65f5538c0f15d5951d7f07b930d1094

SHA256
272228055649002aa68a0787a821ee7e0eff838b2053b6d08531f26b39e09473

SHA512
0f7c802ce7294e16c57030e3c5ecf470c22cc09c1577aad9189d37fa49073cdba7b79a17a616808a7409c44c15e5338bef7c01deca7db52769330831700a0baf

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/tmp/notify.file

Filesize
37B

MD5
736ae293d705d31e74ab5a24118b6af3

SHA1
423c1625b64ec903633ebaf9c9afafd623480ce2

SHA256
94167628e3cadd4bc88fb0b9e14c105d8a084c49a5e420e362acb8ea83d36c0a

SHA512
9c13ed5de370ea0ebe7ab8bc60bb7b6d762124ca603e67a707f3fc728d28e0ecfba07929ceb7ddc229a87709d4e9ba85cdaeae10087cef80ade19a09b93ea9d4

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/usr/bin/bsd-port/getty

Filesize
1.2MB

MD5
8285f35183f0341b8dfe425b7348411d

SHA1
44e569a191a5d7bd720c7af06c2fd81a501a245b

SHA256
551b48e425dcf4337ee023ad65a871123d172e43fabbc965252f5a2e69d0bd4a

SHA512
d9708bdf6e552f1fca816432f1f9a7d4b3ff8517fe2e18b3586c732a411262920743435f19a250f112ac829633f8370bb16de24bf2ec4692777293d97bbb6b4f

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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

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/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