mrblack | 0468ba5c627dee9f0056f13c5bc2fa82e11f386dcfdfeab1c00412f5dfa2655c

Analysis

max time kernel
154s
max time network
132s
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
20/12/2023, 07:56

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General

Target

916713f6a931d88d4b91b468081aadfa
Size

1.2MB
MD5

916713f6a931d88d4b91b468081aadfa
SHA1

27e4c878a87bc6b9fdca08d785d7ebde1d80f963
SHA256

0468ba5c627dee9f0056f13c5bc2fa82e11f386dcfdfeab1c00412f5dfa2655c
SHA512

8a792e70827864160bc7fe01d31544f8179376e4d3cf410d53dc3baed14e6947c629c891af02d8cf67b5a85a99fbd6efc419c4027596f2504d005a3ec39a9e49
SSDEEP

24576:e845rGHu6gVJKG75oFpA0VWeX452y1q2rJp0:745vRVJKGtSA0VWeogu9p0

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	1584	getty
/usr/bin/.sshd	1605	.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/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
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

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	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	cp
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	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/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/stat	Process not Found
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

Writes file to tmp directory 4 IoCs

Malware often drops required files in the /tmp directory.

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

/tmp/916713f6a931d88d4b91b468081aadfa
/tmp/916713f6a931d88d4b91b468081aadfa
1⤵
PID:1560

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc1.d/S97DbSecuritySpt"
1⤵
PID:1566
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc1.d/S97DbSecuritySpt
  2⤵
  PID:1567

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc2.d/S97DbSecuritySpt"
1⤵
PID:1568
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc2.d/S97DbSecuritySpt
  2⤵
  PID:1569

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc3.d/S97DbSecuritySpt"
1⤵
PID:1570
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc3.d/S97DbSecuritySpt
  2⤵
  PID:1571

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc4.d/S97DbSecuritySpt"
1⤵
PID:1572
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc4.d/S97DbSecuritySpt
  2⤵
  PID:1573

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc5.d/S97DbSecuritySpt"
1⤵
PID:1574
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc5.d/S97DbSecuritySpt
  2⤵
  PID:1575

/bin/sh
sh -c "mkdir -p /usr/bin/bsd-port"
1⤵
PID:1576
- /bin/mkdir
  mkdir -p /usr/bin/bsd-port
  2⤵
  - Reads runtime system information
  PID:1577

/bin/sh
sh -c "mkdir -p /usr/bin/bsd-port"
1⤵
PID:1578
- /bin/mkdir
  mkdir -p /usr/bin/bsd-port
  2⤵
  - Reads runtime system information
  PID:1579

/bin/sh
sh -c "cp -f /tmp/916713f6a931d88d4b91b468081aadfa /usr/bin/bsd-port/getty"
1⤵
PID:1580
- /bin/cp
  cp -f /tmp/916713f6a931d88d4b91b468081aadfa /usr/bin/bsd-port/getty
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1581

/bin/sh
sh -c /usr/bin/bsd-port/getty
1⤵
PID:1583
- /usr/bin/bsd-port/getty
  /usr/bin/bsd-port/getty
  2⤵
  - Executes dropped EXE
  PID:1584

/bin/sh
sh -c "mkdir -p /usr/bin"
1⤵
PID:1586
- /bin/mkdir
  mkdir -p /usr/bin
  2⤵
  - Reads runtime system information
  PID:1587

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

/bin/sh
sh -c "cp -f /tmp/916713f6a931d88d4b91b468081aadfa /usr/bin/.sshd"
1⤵
PID:1590
- /bin/cp
  cp -f /tmp/916713f6a931d88d4b91b468081aadfa /usr/bin/.sshd
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1591

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc1.d/S99selinux"
1⤵
PID:1592
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc1.d/S99selinux
  2⤵
  PID:1593

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc2.d/S99selinux"
1⤵
PID:1594
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc2.d/S99selinux
  2⤵
  PID:1595

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc3.d/S99selinux"
1⤵
PID:1596
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc3.d/S99selinux
  2⤵
  PID:1597

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc4.d/S99selinux"
1⤵
PID:1598
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc4.d/S99selinux
  2⤵
  PID:1599

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc5.d/S99selinux"
1⤵
PID:1600
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc5.d/S99selinux
  2⤵
  PID:1601

/bin/sh
sh -c "mkdir -p /usr/bin/dpkgd"
1⤵
PID:1602
- /bin/mkdir
  mkdir -p /usr/bin/dpkgd
  2⤵
  - Reads runtime system information
  PID:1606

/bin/sh
sh -c /usr/bin/.sshd
1⤵
PID:1604
- /usr/bin/.sshd
  /usr/bin/.sshd
  2⤵
  - Executes dropped EXE
  PID:1605

/bin/sh
sh -c "cp -f /bin/ps /usr/bin/dpkgd/ps"
1⤵
PID:1607
- /bin/cp
  cp -f /bin/ps /usr/bin/dpkgd/ps
  2⤵
  - Write file to user bin folder
  - 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 "mkdir -p /bin"
1⤵
PID:1611
- /bin/mkdir
  mkdir -p /bin
  2⤵
  - Reads runtime system information
  PID:1612

/bin/sh
sh -c "cp -f /usr/bin/bsd-port/getty /bin/ps"
1⤵
PID:1613
- /bin/cp
  cp -f /usr/bin/bsd-port/getty /bin/ps
  2⤵
  - Writes file to system bin folder
  - Reads runtime system information
  PID:1614

/bin/sh
sh -c "chmod 0755 /bin/ps"
1⤵
PID:1615
- /bin/chmod
  chmod 0755 /bin/ps
  2⤵
  PID:1616

/bin/sh
sh -c "cp -f /bin/ss /usr/bin/dpkgd/ss"
1⤵
PID:1617
- /bin/cp
  cp -f /bin/ss /usr/bin/dpkgd/ss
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1618

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

/bin/sh
sh -c "mkdir -p /bin"
1⤵
PID:1621
- /bin/mkdir
  mkdir -p /bin
  2⤵
  - Reads runtime system information
  PID:1622

/bin/sh
sh -c "cp -f /usr/bin/bsd-port/getty /bin/ss"
1⤵
PID:1623
- /bin/cp
  cp -f /usr/bin/bsd-port/getty /bin/ss
  2⤵
  - Writes file to system bin folder
  - Reads runtime system information
  PID:1624

/bin/sh
sh -c "chmod 0755 /bin/ss"
1⤵
PID:1625
- /bin/chmod
  chmod 0755 /bin/ss
  2⤵
  PID:1626

/bin/sh
sh -c "cp -f /usr/bin/lsof /usr/bin/dpkgd/lsof"
1⤵
PID:1627
- /bin/cp
  cp -f /usr/bin/lsof /usr/bin/dpkgd/lsof
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1628

/bin/sh
sh -c "mkdir -p /usr/bin"
1⤵
PID:1629
- /bin/mkdir
  mkdir -p /usr/bin
  2⤵
  - Reads runtime system information
  PID:1630

/bin/sh
sh -c "mkdir -p /usr/bin"
1⤵
PID:1631
- /bin/mkdir
  mkdir -p /usr/bin
  2⤵
  - Reads runtime system information
  PID:1632

/bin/sh
sh -c "cp -f /usr/bin/bsd-port/getty /usr/bin/lsof"
1⤵
PID:1633
- /bin/cp
  cp -f /usr/bin/bsd-port/getty /usr/bin/lsof
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1634

/bin/sh
sh -c "chmod 0755 /usr/bin/lsof"
1⤵
PID:1635
- /bin/chmod
  chmod 0755 /usr/bin/lsof
  2⤵
  PID:1637

/bin/sh
sh -c "insmod /tmp/xpacket.ko"
1⤵
PID:1639
- /sbin/insmod
  insmod /tmp/xpacket.ko
  2⤵
  - Reads runtime system information
  PID:1641

/bin/sh
sh -c "insmod /usr/bin/bsd-port/xpacket.ko"
1⤵
PID:1640
- /sbin/insmod
  insmod /usr/bin/bsd-port/xpacket.ko
  2⤵
  - Reads runtime system information
  PID:1642

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
e49066851455841e273fc81967c79ca4

SHA1
6fbd4d0cea188ef5dc7884478acc2ef0a1207d7b

SHA256
becd00598ffcdfc39eb84e500baf7ac8a946511702538e1bbfdbaf008c16ceef

SHA512
58b6f142b6275cbd7bf48537e297020231cae05e5e78a1c3c784e00b0e0ec0db6dfc665b6eac3fbef06cd95c45fd1de652ee2f71b2874bc5489a0ba125799e55

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/etc/init.d/selinux

Filesize
36B

MD5
993cc15058142d96c3daf7852c3d5ee8

SHA1
0950b8b391b04dd3895ea33cd3141543ebd2525d

SHA256
8171d077918611803d93088409f220c66fae1c670b297e1aa5d8cbd548ce9208

SHA512
0c4256c00a3710f97e92581b552682b36b62afc35fe72622c491323c618c19ea62611ac04ccafc3dfcde2254a2ebbd93b69b66795b16e36332293bed83adb928

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/tmp/gates.lod

Filesize
4B

MD5
b132ecc1609bfcf302615847c1caa69a

SHA1
0310477142171b7d67f2a1cd85c90a3b66be9c57

SHA256
8bcefa497af26e688b555d1c4c8cc97365522b5a1416ceb099a98b4c2ed80585

SHA512
816f74839aff001255a4e3fdbc354fd23aeaada1bbd44148e4fad015650143c818f741024cac050b6a4e22ce4d8d64b9591078a1d46d4776a6c51077b937bed0

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/tmp/moni.lod

Filesize
4B

MD5
1c54985e4f95b7819ca0357c0cb9a09f

SHA1
85d0662ad5825ba33f4259d0d06ac035abac67bf

SHA256
245db7164aace830256c713e17486f1785096c86049d6409349fff5f810da253

SHA512
f24fb250d43bbe3ef3f28dfb1c6f8f553540c0d43023a88a718e2d38db9a18eac926cf44bcc3f1840cc8a29b2bdfec41dd0527abdc77aecde0e165742319a232

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/tmp/notify.file

Filesize
37B

MD5
fbe7049b1df4590c0b9f0a8a87c5177b

SHA1
0842e830a4aed52a29186f3691ff8f7938bcfaec

SHA256
81e64d1377d869f808533e9fff79d3a86847ac1bba6e66b8fb5437fda54554ae

SHA512
3ab2c9cd670e2fc6d25354b73766e5bf1082001da735ef74629cb1a2e8d0ab604aba4b75084ca1cf81861c909228954e78a9f567a98c2e6b48a808a8ce60daaa

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/usr/bin/bsd-port/getty

Filesize
1.2MB

MD5
916713f6a931d88d4b91b468081aadfa

SHA1
27e4c878a87bc6b9fdca08d785d7ebde1d80f963

SHA256
0468ba5c627dee9f0056f13c5bc2fa82e11f386dcfdfeab1c00412f5dfa2655c

SHA512
8a792e70827864160bc7fe01d31544f8179376e4d3cf410d53dc3baed14e6947c629c891af02d8cf67b5a85a99fbd6efc419c4027596f2504d005a3ec39a9e49

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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