mrblack | bd7fc5fa571373babbc3a125580ca5a622656020d2bd4b72e23fbe1ddf4bc2ef

Analysis

max time kernel
155s
max time network
158s
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 12:15

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

8b68168778df50cc2390678bc1744a32
Size

1.2MB
MD5

8b68168778df50cc2390678bc1744a32
SHA1

4a508e301183920439776f8abbf0b8bcf93aa5f9
SHA256

bd7fc5fa571373babbc3a125580ca5a622656020d2bd4b72e23fbe1ddf4bc2ef
SHA512

5633bb5357ff78c43717591815e8ffdc0f7b716b9ea75e20fcc3d962b852210e22abf78ba6c2c4c7366537d6a5c60ad39e92e96d9dec210918ef6c4052125cf3
SSDEEP

24576:e845rUHu6gVJKG75oFpA0VWiX4G2y1q2rJp0:7451RVJKGtSA0VWioVu9p0

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	1626	getty
/usr/bin/.sshd	1648	.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/.sshd	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/dpkgd/lsof	cp
File opened for modification	/usr/bin/lsof	cp
File opened for modification	/usr/bin/dpkgd/ps	cp
File opened for modification	/usr/bin/dpkgd/ss	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/arp
File opened for reading	/proc/net/dev
File opened for reading	/proc/net/route

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

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/8b68168778df50cc2390678bc1744a32
/tmp/8b68168778df50cc2390678bc1744a32
1⤵
PID:1603

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc1.d/S97DbSecuritySpt"
1⤵
PID:1608
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc1.d/S97DbSecuritySpt
  2⤵
  PID:1609

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc2.d/S97DbSecuritySpt"
1⤵
PID:1610
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc2.d/S97DbSecuritySpt
  2⤵
  PID:1611

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc3.d/S97DbSecuritySpt"
1⤵
PID:1612
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc3.d/S97DbSecuritySpt
  2⤵
  PID:1613

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc4.d/S97DbSecuritySpt"
1⤵
PID:1614
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc4.d/S97DbSecuritySpt
  2⤵
  PID:1615

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc5.d/S97DbSecuritySpt"
1⤵
PID:1616
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc5.d/S97DbSecuritySpt
  2⤵
  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 "mkdir -p /usr/bin/bsd-port"
1⤵
PID:1620
- /bin/mkdir
  mkdir -p /usr/bin/bsd-port
  2⤵
  - Reads runtime system information
  PID:1621

/bin/sh
sh -c "cp -f /tmp/8b68168778df50cc2390678bc1744a32 /usr/bin/bsd-port/getty"
1⤵
PID:1622
- /bin/cp
  cp -f /tmp/8b68168778df50cc2390678bc1744a32 /usr/bin/bsd-port/getty
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1623

/bin/sh
sh -c /usr/bin/bsd-port/getty
1⤵
PID:1625
- /usr/bin/bsd-port/getty
  /usr/bin/bsd-port/getty
  2⤵
  - Executes dropped EXE
  PID:1626

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

/bin/sh
sh -c "cp -f /tmp/8b68168778df50cc2390678bc1744a32 /usr/bin/.sshd"
1⤵
PID:1632
- /bin/cp
  cp -f /tmp/8b68168778df50cc2390678bc1744a32 /usr/bin/.sshd
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1633

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc1.d/S99selinux"
1⤵
PID:1634
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc1.d/S99selinux
  2⤵
  PID:1635

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc2.d/S99selinux"
1⤵
PID:1636
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc2.d/S99selinux
  2⤵
  PID:1637

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc3.d/S99selinux"
1⤵
PID:1638
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc3.d/S99selinux
  2⤵
  PID:1639

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc4.d/S99selinux"
1⤵
PID:1640
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc4.d/S99selinux
  2⤵
  PID:1641

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc5.d/S99selinux"
1⤵
PID:1642
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc5.d/S99selinux
  2⤵
  PID:1643

/bin/sh
sh -c "mkdir -p /usr/bin/dpkgd"
1⤵
PID:1644
- /bin/mkdir
  mkdir -p /usr/bin/dpkgd
  2⤵
  - Reads runtime system information
  PID:1645

/bin/sh
sh -c /usr/bin/.sshd
1⤵
PID:1647
- /usr/bin/.sshd
  /usr/bin/.sshd
  2⤵
  - Executes dropped EXE
  PID:1648

/bin/sh
sh -c "cp -f /bin/ps /usr/bin/dpkgd/ps"
1⤵
PID:1649
- /bin/cp
  cp -f /bin/ps /usr/bin/dpkgd/ps
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1650

/bin/sh
sh -c "mkdir -p /bin"
1⤵
PID:1651
- /bin/mkdir
  mkdir -p /bin
  2⤵
  - Reads runtime system information
  PID:1652

/bin/sh
sh -c "mkdir -p /bin"
1⤵
PID:1653
- /bin/mkdir
  mkdir -p /bin
  2⤵
  - Reads runtime system information
  PID:1654

/bin/sh
sh -c "cp -f /usr/bin/bsd-port/getty /bin/ps"
1⤵
PID:1655
- /bin/cp
  cp -f /usr/bin/bsd-port/getty /bin/ps
  2⤵
  - Writes file to system bin folder
  - Reads runtime system information
  PID:1656

/bin/sh
sh -c "chmod 0755 /bin/ps"
1⤵
PID:1657
- /bin/chmod
  chmod 0755 /bin/ps
  2⤵
  PID:1658

/bin/sh
sh -c "cp -f /bin/ss /usr/bin/dpkgd/ss"
1⤵
PID:1659
- /bin/cp
  cp -f /bin/ss /usr/bin/dpkgd/ss
  2⤵
  - Write file to user bin folder
  - 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 "mkdir -p /bin"
1⤵
PID:1663
- /bin/mkdir
  mkdir -p /bin
  2⤵
  - Reads runtime system information
  PID:1664

/bin/sh
sh -c "cp -f /usr/bin/bsd-port/getty /bin/ss"
1⤵
PID:1665
- /bin/cp
  cp -f /usr/bin/bsd-port/getty /bin/ss
  2⤵
  - Writes file to system bin folder
  - Reads runtime system information
  PID:1666

/bin/sh
sh -c "chmod 0755 /bin/ss"
1⤵
PID:1667
- /bin/chmod
  chmod 0755 /bin/ss
  2⤵
  PID:1668

/bin/sh
sh -c "cp -f /usr/bin/lsof /usr/bin/dpkgd/lsof"
1⤵
PID:1669
- /bin/cp
  cp -f /usr/bin/lsof /usr/bin/dpkgd/lsof
  2⤵
  - Write file to user bin folder
  - 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 "mkdir -p /usr/bin"
1⤵
PID:1673
- /bin/mkdir
  mkdir -p /usr/bin
  2⤵
  - Reads runtime system information
  PID:1674

/bin/sh
sh -c "cp -f /usr/bin/bsd-port/getty /usr/bin/lsof"
1⤵
PID:1675
- /bin/cp
  cp -f /usr/bin/bsd-port/getty /usr/bin/lsof
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1676

/bin/sh
sh -c "chmod 0755 /usr/bin/lsof"
1⤵
PID:1677
- /bin/chmod
  chmod 0755 /usr/bin/lsof
  2⤵
  PID:1678

/bin/sh
sh -c "insmod /usr/bin/bsd-port/xpacket.ko"
1⤵
PID:1681
- /sbin/insmod
  insmod /usr/bin/bsd-port/xpacket.ko
  2⤵
  - Reads runtime system information
  PID:1682

/bin/sh
sh -c "insmod /tmp/xpacket.ko"
1⤵
PID:1683
- /sbin/insmod
  insmod /tmp/xpacket.ko
  2⤵
  - Reads runtime system information
  PID:1685

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
50B

MD5
e3865bcfb49565f461662399c5195288

SHA1
22690378f38d625971cb85260ef340612e1b69e7

SHA256
923a177bdb0000e97331d5a0b013f914208a73adf704a85d1494877481f340b7

SHA512
89a5622210e16711b976241e7da00869aa7bbe54d244a2f2a992999c1feab3894241769a59736edb62809656fa6eb06dbfbb00aa7358074b404fec63b1445906

Download Submit
/etc/init.d/selinux

Filesize
36B

MD5
993cc15058142d96c3daf7852c3d5ee8

SHA1
0950b8b391b04dd3895ea33cd3141543ebd2525d

SHA256
8171d077918611803d93088409f220c66fae1c670b297e1aa5d8cbd548ce9208

SHA512
0c4256c00a3710f97e92581b552682b36b62afc35fe72622c491323c618c19ea62611ac04ccafc3dfcde2254a2ebbd93b69b66795b16e36332293bed83adb928

Download Submit
/tmp/gates.lod

Filesize
4B

MD5
a368b0de8b91cfb3f91892fbf1ebd4b2

SHA1
422237776eebac1e9ce55eb11b9635704dfe1507

SHA256
361603c11612df16fcb9d48b4c22430535c8e53fe3b3c5a6a39bdf7e0543f65c

SHA512
94e2b403307ffc6882c873e8cf18965c1973d5c6a546628bd4368a56fb70410a6a6138994def58d0304ad265649ab4a3bdb85fc5a9b476d33945c94054ae1663

Download Submit
/tmp/moni.lod

Filesize
4B

MD5
e6384711491713d29bc63fc5eeb5ba4f

SHA1
64e89c002d47826fd7e23d43e239e4ee0d583896

SHA256
b93e56aec7724213a91e5c44256af055313fc7e8d80554fb7ed23b866470695b

SHA512
8777bdf258dedd2ae914f5388d00833bc2601b148e6eb3059e75bbf2bfd67fbae2a44b3a68240b6618af15917bba5cb36f549527cf13cdf94ea49fa955f78c82

Download Submit
/tmp/notify.file

Filesize
37B

MD5
4d60e14bf2dc0b27e0cf646d14083888

SHA1
cd4fad204665c6bb84d7bd60a5fc18f11d346780

SHA256
71943485684b9f68c4a1ff5b72c1718f667bd18addc3ca7817476aa841096a56

SHA512
ba2a41468410ded51d6f03541988f827111ecf5caf1d73b925245b596e68ae605b9ed0dfc87f44645270ed71b7d480e6fd93f0b1a89189b3cb958a31aac09de9

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

Filesize
73B

MD5
e689c90cb8b9c8df8d1890e7b1491d02

SHA1
7f06efa27d17d9d297afb67566a74f02bfb972a1

SHA256
72a5c5caa0765c285683e1015dbe83790ec315b768988ce233201aeeb1e3dd76

SHA512
1f8082a688604b8ffd8644222715caa30f60b4b8e070b526ecaff565fc9b92c690bf86383c02dd97d7361fc962ad647248bee431df8464f0f62ced8632abb99d

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

Filesize
1.2MB

MD5
8b68168778df50cc2390678bc1744a32

SHA1
4a508e301183920439776f8abbf0b8bcf93aa5f9

SHA256
bd7fc5fa571373babbc3a125580ca5a622656020d2bd4b72e23fbe1ddf4bc2ef

SHA512
5633bb5357ff78c43717591815e8ffdc0f7b716b9ea75e20fcc3d962b852210e22abf78ba6c2c4c7366537d6a5c60ad39e92e96d9dec210918ef6c4052125cf3

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