mrblack | b43f51ff2d22190de7506715402aa89521a55d2a24f15044103dfe6fb2cb860c

Analysis

max time kernel
299s
max time network
286s
platform
ubuntu-18.04_amd64
resource
ubuntu1804-amd64-20240226-en
resource tags

arch:amd64arch:i386image:ubuntu1804-amd64-20240226-enkernel:4.15.0-213-genericlocale:en-usos:ubuntu-18.04-amd64system
submitted
01/03/2024, 15:32

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

b43f51ff2d22190de7506715402aa89521a55d2a24f15044103dfe6fb2cb860c
Size

1.2MB
MD5

274a2caa2427a5cbdd52a7eb0dd5860d
SHA1

8fcfea93ae7049c5f1a7679199d9f7f72deb5940
SHA256

b43f51ff2d22190de7506715402aa89521a55d2a24f15044103dfe6fb2cb860c
SHA512

38fccb019474b23bcc060f87c9707aab5ff721fc398df8fe8bebd681b7962584347b58800602e210b3a42e94262072d5592eae79e44ea57478fb23fb4c4f9645
SSDEEP

24576:e845rGHu6gVJKG75oFpA0VWeX4Q2y1q2rJp0:745vRVJKGtSA0VWeonu9p0

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	1624	getty
/usr/bin/.sshd	1654	.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/getty	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/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/.sshd	cp
File opened for modification	/usr/bin/dpkgd/ps	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/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	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/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/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/filesystems	mkdir
File opened for reading	/proc/filesystems	mkdir
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	cp
File opened for reading	/proc/stat	Process not Found
File opened for reading	/proc/cmdline	insmod
File opened for reading	/proc/filesystems	cp

Writes file to tmp directory 5 IoCs

Malware often drops required files in the /tmp directory.

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

/tmp/b43f51ff2d22190de7506715402aa89521a55d2a24f15044103dfe6fb2cb860c
/tmp/b43f51ff2d22190de7506715402aa89521a55d2a24f15044103dfe6fb2cb860c
1⤵
PID:1591

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc1.d/S97DbSecuritySpt"
1⤵
PID:1606
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc1.d/S97DbSecuritySpt
  2⤵
  PID:1607

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc2.d/S97DbSecuritySpt"
1⤵
PID:1608
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc2.d/S97DbSecuritySpt
  2⤵
  PID:1609

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc3.d/S97DbSecuritySpt"
1⤵
PID:1610
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc3.d/S97DbSecuritySpt
  2⤵
  PID:1611

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc4.d/S97DbSecuritySpt"
1⤵
PID:1612
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc4.d/S97DbSecuritySpt
  2⤵
  PID:1613

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc5.d/S97DbSecuritySpt"
1⤵
PID:1614
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc5.d/S97DbSecuritySpt
  2⤵
  PID:1615

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

/bin/sh
sh -c "mkdir -p /usr/bin/bsd-port"
1⤵
PID:1618
- /bin/mkdir
  mkdir -p /usr/bin/bsd-port
  2⤵
  - Reads runtime system information
  PID:1619

/bin/sh
sh -c "cp -f /tmp/b43f51ff2d22190de7506715402aa89521a55d2a24f15044103dfe6fb2cb860c /usr/bin/bsd-port/getty"
1⤵
PID:1620
- /bin/cp
  cp -f /tmp/b43f51ff2d22190de7506715402aa89521a55d2a24f15044103dfe6fb2cb860c /usr/bin/bsd-port/getty
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1621

/bin/sh
sh -c /usr/bin/bsd-port/getty
1⤵
PID:1623
- /usr/bin/bsd-port/getty
  /usr/bin/bsd-port/getty
  2⤵
  - Executes dropped EXE
  PID:1624

/bin/sh
sh -c "mkdir -p /usr/bin"
1⤵
PID:1626
- /bin/mkdir
  mkdir -p /usr/bin
  2⤵
  - Reads runtime system information
  PID:1627

/bin/sh
sh -c "mkdir -p /usr/bin"
1⤵
PID:1628
- /bin/mkdir
  mkdir -p /usr/bin
  2⤵
  - Reads runtime system information
  PID:1629

/bin/sh
sh -c "cp -f /tmp/b43f51ff2d22190de7506715402aa89521a55d2a24f15044103dfe6fb2cb860c /usr/bin/.sshd"
1⤵
PID:1630
- /bin/cp
  cp -f /tmp/b43f51ff2d22190de7506715402aa89521a55d2a24f15044103dfe6fb2cb860c /usr/bin/.sshd
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1631

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc1.d/S99selinux"
1⤵
PID:1632
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc1.d/S99selinux
  2⤵
  PID:1633

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc2.d/S99selinux"
1⤵
PID:1634
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc2.d/S99selinux
  2⤵
  PID:1635

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc3.d/S99selinux"
1⤵
PID:1636
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc3.d/S99selinux
  2⤵
  PID:1637

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc4.d/S99selinux"
1⤵
PID:1638
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc4.d/S99selinux
  2⤵
  PID:1639

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc5.d/S99selinux"
1⤵
PID:1640
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc5.d/S99selinux
  2⤵
  PID:1641

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

/bin/sh
sh -c "cp -f /bin/ps /usr/bin/dpkgd/ps"
1⤵
PID:1644
- /bin/cp
  cp -f /bin/ps /usr/bin/dpkgd/ps
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1645

/bin/sh
sh -c "mkdir -p /bin"
1⤵
PID:1646
- /bin/mkdir
  mkdir -p /bin
  2⤵
  - Reads runtime system information
  PID:1647

/bin/sh
sh -c "mkdir -p /bin"
1⤵
PID:1648
- /bin/mkdir
  mkdir -p /bin
  2⤵
  - Reads runtime system information
  PID:1649

/bin/sh
sh -c "cp -f /usr/bin/bsd-port/getty /bin/ps"
1⤵
PID:1650
- /bin/cp
  cp -f /usr/bin/bsd-port/getty /bin/ps
  2⤵
  - Writes file to system bin folder
  - Reads runtime system information
  PID:1651

/bin/sh
sh -c /usr/bin/.sshd
1⤵
PID:1653
- /usr/bin/.sshd
  /usr/bin/.sshd
  2⤵
  - Executes dropped EXE
  PID:1654

/bin/sh
sh -c "chmod 0755 /bin/ps"
1⤵
PID:1655
- /bin/chmod
  chmod 0755 /bin/ps
  2⤵
  PID:1656

/bin/sh
sh -c "cp -f /bin/ss /usr/bin/dpkgd/ss"
1⤵
PID:1657
- /bin/cp
  cp -f /bin/ss /usr/bin/dpkgd/ss
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1658

/bin/sh
sh -c "mkdir -p /bin"
1⤵
PID:1659
- /bin/mkdir
  mkdir -p /bin
  2⤵
  - Reads runtime system information
  PID:1660

/bin/sh
sh -c "mkdir -p /bin"
1⤵
PID:1661
- /bin/mkdir
  mkdir -p /bin
  2⤵
  - Reads runtime system information
  PID:1662

/bin/sh
sh -c "cp -f /usr/bin/bsd-port/getty /bin/ss"
1⤵
PID:1663
- /bin/cp
  cp -f /usr/bin/bsd-port/getty /bin/ss
  2⤵
  - Writes file to system bin folder
  - Reads runtime system information
  PID:1664

/bin/sh
sh -c "chmod 0755 /bin/ss"
1⤵
PID:1665
- /bin/chmod
  chmod 0755 /bin/ss
  2⤵
  PID:1666

/bin/sh
sh -c "cp -f /usr/bin/lsof /usr/bin/dpkgd/lsof"
1⤵
PID:1667
- /bin/cp
  cp -f /usr/bin/lsof /usr/bin/dpkgd/lsof
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1668

/bin/sh
sh -c "mkdir -p /usr/bin"
1⤵
PID:1669
- /bin/mkdir
  mkdir -p /usr/bin
  2⤵
  - Reads runtime system information
  PID:1670

/bin/sh
sh -c "mkdir -p /usr/bin"
1⤵
PID:1671
- /bin/mkdir
  mkdir -p /usr/bin
  2⤵
  - Reads runtime system information
  PID:1672

/bin/sh
sh -c "cp -f /usr/bin/bsd-port/getty /usr/bin/lsof"
1⤵
PID:1673
- /bin/cp
  cp -f /usr/bin/bsd-port/getty /usr/bin/lsof
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1674

/bin/sh
sh -c "chmod 0755 /usr/bin/lsof"
1⤵
PID:1675
- /bin/chmod
  chmod 0755 /usr/bin/lsof
  2⤵
  PID:1676

/bin/sh
sh -c "insmod /usr/bin/bsd-port/xpacket.ko"
1⤵
PID:1679
- /sbin/insmod
  insmod /usr/bin/bsd-port/xpacket.ko
  2⤵
  - Reads runtime system information
  PID:1680

/bin/sh
sh -c "insmod /tmp/xpacket.ko"
1⤵
PID:1686
- /sbin/insmod
  insmod /tmp/xpacket.ko
  2⤵
  - Reads runtime system information
  PID:1687

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

Replay Monitor

Loading Replay Monitor...

Downloads

/etc/init.d/DbSecuritySpt

Filesize
82B

MD5
746d8ff7117cc8d09091fa46ea4b80ea

SHA1
e239f4c06613fae7b5ccd82acadb888143b9c7db

SHA256
5fc747949b36010a1f20f27258e86a69a5e4cc9288cf75dd5c0d966d306612de

SHA512
5a9e7f95b68f6eb2ae1aba7ecd540cc4c87b46e44b88631a52bdc6df149bd832b2f95513eb915cb2ecfa1a55c75bf6013375e7ce1ae500f763b8421c59586fa9

Download Submit
/etc/init.d/selinux

Filesize
36B

MD5
993cc15058142d96c3daf7852c3d5ee8

SHA1
0950b8b391b04dd3895ea33cd3141543ebd2525d

SHA256
8171d077918611803d93088409f220c66fae1c670b297e1aa5d8cbd548ce9208

SHA512
0c4256c00a3710f97e92581b552682b36b62afc35fe72622c491323c618c19ea62611ac04ccafc3dfcde2254a2ebbd93b69b66795b16e36332293bed83adb928

Download Submit
/tmp/gates.lod

Filesize
4B

MD5
d72fbbccd9fe64c3a14f85d225a046f4

SHA1
348e495881ef4526fe8e38dba4ceaa49b829b8b2

SHA256
8cca04ee02b8915f60a6b72c1faf19923aa12aafb5af89bc4bfd403dc60a836b

SHA512
02107aa7dc8942af948b790560f406445e172eff5c838b73d0eb8d86e3021ff4bcbb310a5f3290b3ff6e46170cd36e2df76fc373b47e3b8e9f219c6f6e22d85f

Download Submit
/tmp/moni.lod

Filesize
4B

MD5
08e6bea8e90ba87af3c9554d94db6579

SHA1
f6c851b89dddaf2314c44b0b0fd3f7f70784fcbb

SHA256
88b82308d570d71f02c5aa6a14ffe29a7ffbe14969a63094eb19e8e34256d9bf

SHA512
1771fa59c930ca0a37335569539bce0e096a772b0413eb5a34894e536360c633a6df469e76393765013adda49dd394e67b9f2a17f529c8c684d2ce447343f085

Download Submit
/tmp/notify.file

Filesize
69B

MD5
fbf50da8f95867cb9eed5e13ad2184bc

SHA1
6a4adee971ee5f17ea885f898ecd76c41b688be1

SHA256
81f37bab27933f1cc914e717c76675b7934fd1df6eeba58def0ea84f5e7e9869

SHA512
8215f903baffb324357e96084cc5c7a2a2edc864582698b1bb8d5bfb5277815592afafbcbfe9400d1b3ad43ca94c8d74f68ea91d711459debcffc6c71e3b7746

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

Filesize
73B

MD5
3911fae9deb2d0b407ddc3baabe41700

SHA1
f10ef35d90f9f2cd7908edeb26a2350fb39886a6

SHA256
801a821b9e4068684c96b77fe35b835d17aa2a0d80e7734c95c8dad4891882e2

SHA512
89c03753b4fc8c553a1dd3b56c1692225c1293548ac08a7eb9fc85cbb4252ed696d0efda7e6788912eb1cfce7f440f9588afd5076daa5980d5520466a7c21165

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

Filesize
1.2MB

MD5
274a2caa2427a5cbdd52a7eb0dd5860d

SHA1
8fcfea93ae7049c5f1a7679199d9f7f72deb5940

SHA256
b43f51ff2d22190de7506715402aa89521a55d2a24f15044103dfe6fb2cb860c

SHA512
38fccb019474b23bcc060f87c9707aab5ff721fc398df8fe8bebd681b7962584347b58800602e210b3a42e94262072d5592eae79e44ea57478fb23fb4c4f9645

Download Submit
/usr/bin/dpkgd/lsof

Filesize
159KB

MD5
e093dc78225e2a0a25e3b137c1c1e442

SHA1
c29497cfaae729eb576875e4fdfa400640ab16be

SHA256
1190f4dbc7be174de8fd4096c9bf7a28eebfac937d308b7cc533be4a1240d26e

SHA512
fe1cc7a65327732eaaee89f427c10239ba822430e34177842f4681068d78d404b1830d808a2a71b1efcc5f126c6d8c053512237421173aaa150e215a672da6f0

Download Submit
/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

Download Submit

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads