mrblack | cf83ec2b11b126e9d552d81a0611add9e3012f792f15f18a738b084a55db6a77

Analysis

max time kernel
154s
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
19-12-2023 23:22

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General

Target

5ebc7f88cc268c854aaa9f388b67502d
Size

1.2MB
MD5

5ebc7f88cc268c854aaa9f388b67502d
SHA1

c647cfb4eb6395a4872068508f559ff80a6d3180
SHA256

cf83ec2b11b126e9d552d81a0611add9e3012f792f15f18a738b084a55db6a77
SHA512

a2ecd3aa7d9532cd3186719774860e417fc2f285076ad87f161efc31f41306e10f6d70fca6c7e480e8ab345e723fc04921fcf7b6ee6c58a65156adcfecc52a06
SSDEEP

24576:e845rGHu6gVJKG75oFpA0VWeX4q2y1q2rJp0:745vRVJKGtSA0VWeoJu9p0

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	1569	getty
/usr/bin/.sshd	1588	.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

Write file to user bin folder 1 TTPs 8 IoCs

Hijack Execution Flow

T1574

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

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

Writes file to tmp directory 4 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

/tmp/5ebc7f88cc268c854aaa9f388b67502d
/tmp/5ebc7f88cc268c854aaa9f388b67502d
1⤵
PID:1536

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc1.d/S97DbSecuritySpt"
1⤵
PID:1541
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc1.d/S97DbSecuritySpt
  2⤵
  PID:1542

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc2.d/S97DbSecuritySpt"
1⤵
PID:1543
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc2.d/S97DbSecuritySpt
  2⤵
  PID:1544

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc3.d/S97DbSecuritySpt"
1⤵
PID:1545
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc3.d/S97DbSecuritySpt
  2⤵
  PID:1546

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc4.d/S97DbSecuritySpt"
1⤵
PID:1547
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc4.d/S97DbSecuritySpt
  2⤵
  PID:1548

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc5.d/S97DbSecuritySpt"
1⤵
PID:1549
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc5.d/S97DbSecuritySpt
  2⤵
  PID:1550

/bin/sh
sh -c "mkdir -p /usr/bin/bsd-port"
1⤵
PID:1561
- /bin/mkdir
  mkdir -p /usr/bin/bsd-port
  2⤵
  - Reads runtime system information
  PID:1562

/bin/sh
sh -c "mkdir -p /usr/bin/bsd-port"
1⤵
PID:1563
- /bin/mkdir
  mkdir -p /usr/bin/bsd-port
  2⤵
  - Reads runtime system information
  PID:1564

/bin/sh
sh -c "cp -f /tmp/5ebc7f88cc268c854aaa9f388b67502d /usr/bin/bsd-port/getty"
1⤵
PID:1565
- /bin/cp
  cp -f /tmp/5ebc7f88cc268c854aaa9f388b67502d /usr/bin/bsd-port/getty
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1566

/bin/sh
sh -c /usr/bin/bsd-port/getty
1⤵
PID:1568
- /usr/bin/bsd-port/getty
  /usr/bin/bsd-port/getty
  2⤵
  - Executes dropped EXE
  PID:1569

/bin/sh
sh -c "mkdir -p /usr/bin"
1⤵
PID:1571
- /bin/mkdir
  mkdir -p /usr/bin
  2⤵
  - Reads runtime system information
  PID:1572

/bin/sh
sh -c "mkdir -p /usr/bin"
1⤵
PID:1573
- /bin/mkdir
  mkdir -p /usr/bin
  2⤵
  - Reads runtime system information
  PID:1574

/bin/sh
sh -c "cp -f /tmp/5ebc7f88cc268c854aaa9f388b67502d /usr/bin/.sshd"
1⤵
PID:1575
- /bin/cp
  cp -f /tmp/5ebc7f88cc268c854aaa9f388b67502d /usr/bin/.sshd
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1576

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc1.d/S99selinux"
1⤵
PID:1577
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc1.d/S99selinux
  2⤵
  PID:1578

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc2.d/S99selinux"
1⤵
PID:1579
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc2.d/S99selinux
  2⤵
  PID:1580

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc3.d/S99selinux"
1⤵
PID:1581
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc3.d/S99selinux
  2⤵
  PID:1582

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc4.d/S99selinux"
1⤵
PID:1583
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc4.d/S99selinux
  2⤵
  PID:1584

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc5.d/S99selinux"
1⤵
PID:1585
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc5.d/S99selinux
  2⤵
  PID:1589

/bin/sh
sh -c /usr/bin/.sshd
1⤵
PID:1587
- /usr/bin/.sshd
  /usr/bin/.sshd
  2⤵
  - Executes dropped EXE
  PID:1588

/bin/sh
sh -c "mkdir -p /usr/bin/dpkgd"
1⤵
PID:1590
- /bin/mkdir
  mkdir -p /usr/bin/dpkgd
  2⤵
  - Reads runtime system information
  PID:1591

/bin/sh
sh -c "cp -f /bin/ps /usr/bin/dpkgd/ps"
1⤵
PID:1592
- /bin/cp
  cp -f /bin/ps /usr/bin/dpkgd/ps
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1593

/bin/sh
sh -c "mkdir -p /bin"
1⤵
PID:1594
- /bin/mkdir
  mkdir -p /bin
  2⤵
  - Reads runtime system information
  PID:1595

/bin/sh
sh -c "mkdir -p /bin"
1⤵
PID:1596
- /bin/mkdir
  mkdir -p /bin
  2⤵
  - Reads runtime system information
  PID:1597

/bin/sh
sh -c "cp -f /usr/bin/bsd-port/getty /bin/ps"
1⤵
PID:1598
- /bin/cp
  cp -f /usr/bin/bsd-port/getty /bin/ps
  2⤵
  - Writes file to system bin folder
  - Reads runtime system information
  PID:1599

/bin/sh
sh -c "chmod 0755 /bin/ps"
1⤵
PID:1600
- /bin/chmod
  chmod 0755 /bin/ps
  2⤵
  PID:1601

/bin/sh
sh -c "cp -f /bin/ss /usr/bin/dpkgd/ss"
1⤵
PID:1602
- /bin/cp
  cp -f /bin/ss /usr/bin/dpkgd/ss
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1603

/bin/sh
sh -c "mkdir -p /bin"
1⤵
PID:1604
- /bin/mkdir
  mkdir -p /bin
  2⤵
  - Reads runtime system information
  PID:1605

/bin/sh
sh -c "mkdir -p /bin"
1⤵
PID:1606
- /bin/mkdir
  mkdir -p /bin
  2⤵
  - Reads runtime system information
  PID:1607

/bin/sh
sh -c "cp -f /usr/bin/bsd-port/getty /bin/ss"
1⤵
PID:1608
- /bin/cp
  cp -f /usr/bin/bsd-port/getty /bin/ss
  2⤵
  - Writes file to system bin folder
  - Reads runtime system information
  PID:1609

/bin/sh
sh -c "chmod 0755 /bin/ss"
1⤵
PID:1610
- /bin/chmod
  chmod 0755 /bin/ss
  2⤵
  PID:1611

/bin/sh
sh -c "cp -f /usr/bin/lsof /usr/bin/dpkgd/lsof"
1⤵
PID:1612
- /bin/cp
  cp -f /usr/bin/lsof /usr/bin/dpkgd/lsof
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1613

/bin/sh
sh -c "mkdir -p /usr/bin"
1⤵
PID:1614
- /bin/mkdir
  mkdir -p /usr/bin
  2⤵
  - Reads runtime system information
  PID:1615

/bin/sh
sh -c "mkdir -p /usr/bin"
1⤵
PID:1616
- /bin/mkdir
  mkdir -p /usr/bin
  2⤵
  - Reads runtime system information
  PID:1617

/bin/sh
sh -c "cp -f /usr/bin/bsd-port/getty /usr/bin/lsof"
1⤵
PID:1618
- /bin/cp
  cp -f /usr/bin/bsd-port/getty /usr/bin/lsof
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1619

/bin/sh
sh -c "chmod 0755 /usr/bin/lsof"
1⤵
PID:1620
- /bin/chmod
  chmod 0755 /usr/bin/lsof
  2⤵
  PID:1621

/bin/sh
sh -c "insmod /tmp/xpacket.ko"
1⤵
PID:1625
- /sbin/insmod
  insmod /tmp/xpacket.ko
  2⤵
  - Reads runtime system information
  PID:1627

/bin/sh
sh -c "insmod /usr/bin/bsd-port/xpacket.ko"
1⤵
PID:1624
- /sbin/insmod
  insmod /usr/bin/bsd-port/xpacket.ko
  2⤵
  - Reads runtime system information
  PID:1626

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
88199cc321e45e64e880e527b367f06a

SHA1
a9fc5c361b7b51aeb609ce2391cfcbad3b25e5a9

SHA256
214ef204d98cda23ebb8389cd5d198dd065183e873f41a50294f23f058d2719d

SHA512
74d05ed68058763ceef0ea1b434115ef5d6da7518d46115de8c22d46b221662287d066fd3346c406eef3c3efcf3ebc7711bcc16f1864385fa76ee60057dd8f03

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/etc/init.d/selinux

Filesize
36B

MD5
993cc15058142d96c3daf7852c3d5ee8

SHA1
0950b8b391b04dd3895ea33cd3141543ebd2525d

SHA256
8171d077918611803d93088409f220c66fae1c670b297e1aa5d8cbd548ce9208

SHA512
0c4256c00a3710f97e92581b552682b36b62afc35fe72622c491323c618c19ea62611ac04ccafc3dfcde2254a2ebbd93b69b66795b16e36332293bed83adb928

Download Submit
/tmp/gates.lod

Filesize
4B

MD5
d1a69640d53a32a9fb13e93d1c8f3104

SHA1
ad896e3ecf46771003093f24b88cd72af2225023

SHA256
6a27eece1c1658b237aede5c6c2b8af51d235ca08b2f7963b67d99caa7a12395

SHA512
100604d883bb248a24436fea1542cf81636e693256e0f0e8943c3cbdf7aa89bf759ddad050d1c3c487c07b00258dc0e6eefbc04d7109d7a788e2f8b98a9e3894

Download Submit
/tmp/moni.lod

Filesize
4B

MD5
c7af0926b294e47e52e46cfebe173f20

SHA1
948b13c7ba369f02fc29d936c124689877023958

SHA256
6d7be37d6aa3665ddca5b4c3ab26e689e4efc1c33bea69ccbaeec6ed49569558

SHA512
84ff72624f10220c6960fc1d0fe9bbdd329bdc5b8eeef36d8b31d9f3b78f050f11d21b67839576982d1aa87312a1c19e075d284f7b13d28d87631735d73310e6

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/tmp/notify.file

Filesize
37B

MD5
93f4b58e3b4550e2cd8125f0c55e4958

SHA1
60b2471028e4e99959f02634977392fadd766a66

SHA256
dd1cfd74c80f45275a1fa35d4e1a4896b7518385c34841c37dc414e869f54002

SHA512
b1f07c52d43a272ad286409b02a3411b7f59e230684f069488b2bd582d7010000d1b882d7ba94cee619fd1af3cd4a6c316664dc32e4863a773f17f34aaa62569

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/usr/bin/bsd-port/getty

Filesize
1.2MB

MD5
5ebc7f88cc268c854aaa9f388b67502d

SHA1
c647cfb4eb6395a4872068508f559ff80a6d3180

SHA256
cf83ec2b11b126e9d552d81a0611add9e3012f792f15f18a738b084a55db6a77

SHA512
a2ecd3aa7d9532cd3186719774860e417fc2f285076ad87f161efc31f41306e10f6d70fca6c7e480e8ab345e723fc04921fcf7b6ee6c58a65156adcfecc52a06

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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