mrblack | 544d2f9e21eb2892b5d2bd0135cb2b7a7e9d35983eed1ecbf45e71e89f4fb0a7

Analysis

max time kernel
152s
max time network
134s
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 13:09

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General

Target

99dd48584152704db970a7b536c47bd5
Size

1.2MB
MD5

99dd48584152704db970a7b536c47bd5
SHA1

eac36532779460580cd80e8f3d22e324bae71494
SHA256

544d2f9e21eb2892b5d2bd0135cb2b7a7e9d35983eed1ecbf45e71e89f4fb0a7
SHA512

34bcb7f4bbc1cb74f0ef6f6d8c04c12987d0d5756cf148cb79f7448891fc46c37d08a816ebb9e4fda3dc62befafc42aadd863956699cd2c82a35279e0bd94025
SSDEEP

24576:e845rGHu6gVJKG75oFpA0VWeX4/2y1q2rJp0:745vRVJKGtSA0VWeo+u9p0

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	1558	getty
/usr/bin/.sshd	1612	.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

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

Writes file to tmp directory 5 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
File opened for modification	/tmp/conf.n

/tmp/99dd48584152704db970a7b536c47bd5
/tmp/99dd48584152704db970a7b536c47bd5
1⤵
PID:1535

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc1.d/S97DbSecuritySpt"
1⤵
PID:1540
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc1.d/S97DbSecuritySpt
  2⤵
  PID:1541

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc2.d/S97DbSecuritySpt"
1⤵
PID:1542
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc2.d/S97DbSecuritySpt
  2⤵
  PID:1543

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc3.d/S97DbSecuritySpt"
1⤵
PID:1544
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc3.d/S97DbSecuritySpt
  2⤵
  PID:1545

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc4.d/S97DbSecuritySpt"
1⤵
PID:1546
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc4.d/S97DbSecuritySpt
  2⤵
  PID:1547

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc5.d/S97DbSecuritySpt"
1⤵
PID:1548
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc5.d/S97DbSecuritySpt
  2⤵
  PID:1549

/bin/sh
sh -c "mkdir -p /usr/bin/bsd-port"
1⤵
PID:1550
- /bin/mkdir
  mkdir -p /usr/bin/bsd-port
  2⤵
  - Reads runtime system information
  PID:1551

/bin/sh
sh -c "mkdir -p /usr/bin/bsd-port"
1⤵
PID:1552
- /bin/mkdir
  mkdir -p /usr/bin/bsd-port
  2⤵
  - Reads runtime system information
  PID:1553

/bin/sh
sh -c "cp -f /tmp/99dd48584152704db970a7b536c47bd5 /usr/bin/bsd-port/getty"
1⤵
PID:1554
- /bin/cp
  cp -f /tmp/99dd48584152704db970a7b536c47bd5 /usr/bin/bsd-port/getty
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1555

/bin/sh
sh -c /usr/bin/bsd-port/getty
1⤵
PID:1557
- /usr/bin/bsd-port/getty
  /usr/bin/bsd-port/getty
  2⤵
  - Executes dropped EXE
  PID:1558

/bin/sh
sh -c "mkdir -p /usr/bin"
1⤵
PID:1560
- /bin/mkdir
  mkdir -p /usr/bin
  2⤵
  - Reads runtime system information
  PID:1561

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

/bin/sh
sh -c "cp -f /tmp/99dd48584152704db970a7b536c47bd5 /usr/bin/.sshd"
1⤵
PID:1564
- /bin/cp
  cp -f /tmp/99dd48584152704db970a7b536c47bd5 /usr/bin/.sshd
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1565

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc1.d/S99selinux"
1⤵
PID:1566
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc1.d/S99selinux
  2⤵
  PID:1567

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc2.d/S99selinux"
1⤵
PID:1568
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc2.d/S99selinux
  2⤵
  PID:1569

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc3.d/S99selinux"
1⤵
PID:1570
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc3.d/S99selinux
  2⤵
  PID:1571

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc4.d/S99selinux"
1⤵
PID:1572
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc4.d/S99selinux
  2⤵
  PID:1573

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc5.d/S99selinux"
1⤵
PID:1574
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc5.d/S99selinux
  2⤵
  PID:1575

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

/bin/sh
sh -c "cp -f /bin/ps /usr/bin/dpkgd/ps"
1⤵
PID:1578
- /bin/cp
  cp -f /bin/ps /usr/bin/dpkgd/ps
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1579

/bin/sh
sh -c "mkdir -p /bin"
1⤵
PID:1580
- /bin/mkdir
  mkdir -p /bin
  2⤵
  - Reads runtime system information
  PID:1581

/bin/sh
sh -c "mkdir -p /bin"
1⤵
PID:1582
- /bin/mkdir
  mkdir -p /bin
  2⤵
  - Reads runtime system information
  PID:1583

/bin/sh
sh -c "cp -f /usr/bin/bsd-port/getty /bin/ps"
1⤵
PID:1584
- /bin/cp
  cp -f /usr/bin/bsd-port/getty /bin/ps
  2⤵
  - Writes file to system bin folder
  - Reads runtime system information
  PID:1585

/bin/sh
sh -c "chmod 0755 /bin/ps"
1⤵
PID:1586
- /bin/chmod
  chmod 0755 /bin/ps
  2⤵
  PID:1587

/bin/sh
sh -c "cp -f /bin/ss /usr/bin/dpkgd/ss"
1⤵
PID:1588
- /bin/cp
  cp -f /bin/ss /usr/bin/dpkgd/ss
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1589

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

/bin/sh
sh -c "mkdir -p /bin"
1⤵
PID:1592
- /bin/mkdir
  mkdir -p /bin
  2⤵
  - Reads runtime system information
  PID:1593

/bin/sh
sh -c "cp -f /usr/bin/bsd-port/getty /bin/ss"
1⤵
PID:1594
- /bin/cp
  cp -f /usr/bin/bsd-port/getty /bin/ss
  2⤵
  - Writes file to system bin folder
  - Reads runtime system information
  PID:1595

/bin/sh
sh -c "chmod 0755 /bin/ss"
1⤵
PID:1596
- /bin/chmod
  chmod 0755 /bin/ss
  2⤵
  PID:1597

/bin/sh
sh -c "cp -f /usr/bin/lsof /usr/bin/dpkgd/lsof"
1⤵
PID:1598
- /bin/cp
  cp -f /usr/bin/lsof /usr/bin/dpkgd/lsof
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1599

/bin/sh
sh -c "mkdir -p /usr/bin"
1⤵
PID:1600
- /bin/mkdir
  mkdir -p /usr/bin
  2⤵
  - Reads runtime system information
  PID:1601

/bin/sh
sh -c "mkdir -p /usr/bin"
1⤵
PID:1602
- /bin/mkdir
  mkdir -p /usr/bin
  2⤵
  - Reads runtime system information
  PID:1603

/bin/sh
sh -c "cp -f /usr/bin/bsd-port/getty /usr/bin/lsof"
1⤵
PID:1604
- /bin/cp
  cp -f /usr/bin/bsd-port/getty /usr/bin/lsof
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1605

/bin/sh
sh -c "chmod 0755 /usr/bin/lsof"
1⤵
PID:1606
- /bin/chmod
  chmod 0755 /usr/bin/lsof
  2⤵
  PID:1607

/bin/sh
sh -c /usr/bin/.sshd
1⤵
PID:1611
- /usr/bin/.sshd
  /usr/bin/.sshd
  2⤵
  - Executes dropped EXE
  PID:1612

/bin/sh
sh -c "insmod /usr/bin/bsd-port/xpacket.ko"
1⤵
PID:1615
- /sbin/insmod
  insmod /usr/bin/bsd-port/xpacket.ko
  2⤵
  - Reads runtime system information
  PID:1616

/bin/sh
sh -c "insmod /tmp/xpacket.ko"
1⤵
PID:1627
- /sbin/insmod
  insmod /tmp/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
73679f737b7b8022dd605e79fffe8c8e

SHA1
d28fc9a4f87cbedf2e09f44ac52c498f5c362fb3

SHA256
fa5e570d20fb0071742d5bbe57920627f532f15d25222d3feea1615843133177

SHA512
0c58bfc05f570f5af4bcecd051c3d07fbafbb94def403d68675de1a34ac92a0071ee5d7c8fb24a49cdbb45c84b72ea0b42806c3e420ca55ec6a2fbb6d1b70b70

Download Submit
/etc/init.d/selinux

Filesize
36B

MD5
993cc15058142d96c3daf7852c3d5ee8

SHA1
0950b8b391b04dd3895ea33cd3141543ebd2525d

SHA256
8171d077918611803d93088409f220c66fae1c670b297e1aa5d8cbd548ce9208

SHA512
0c4256c00a3710f97e92581b552682b36b62afc35fe72622c491323c618c19ea62611ac04ccafc3dfcde2254a2ebbd93b69b66795b16e36332293bed83adb928

Download Submit
/tmp/gates.lod

Filesize
4B

MD5
b5a1fc2085986034e448d2ccc5bb9703

SHA1
2c8041adcd90153af5180e4c18e22c3b161c25e8

SHA256
b51e45a12fbae3d0ee2bf77f1a4f80cbf642e2b4d1c237d2c0f7053a54f6b388

SHA512
2ac6bc01e772f216c8298153168105655141b62abae70c966f38b03936a56a8c3f6576c556901ebc1ad905b891692a2889fd75b9ee586de28e8f2fe7302dfc14

Download Submit
/tmp/moni.lod

Filesize
4B

MD5
69d658d0b2859e32cd4dc3b970c8496c

SHA1
2a7bcf3804dc71895222bdd5f95e64444ce51654

SHA256
96382608813353bee4eeaf0635a3b3356276fece94fe8c9cf048871078f8fd14

SHA512
1222e306ef8fe358e297a275b61a3bb9aca3ec2b38ed1056fd2816b7bba7b32104218680531d8f8f12cea6e4e726c06daea88cf427163bd3365d0675350a428c

Download Submit
/tmp/notify.file

Filesize
37B

MD5
983abd6bbd86af92ce59dc235f576aa5

SHA1
faa05e142d7d7bc1a354157cc2d73867ad2b06e7

SHA256
aa93156621b683e15ba6f8263c06a37464757c11372fd0f842492d70c5f091cd

SHA512
40b9cab11ee1e4eaa4b69ba6196e353e6282a7df5917931d714708b4516347c0066fe43b498de7df67a22e7c0a344929c0d0241f645e3079193b1c5f194119d9

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

Filesize
73B

MD5
c33233ed8756fc1188f6398f4b2ce4d6

SHA1
cc8600c3176251caa9150f0517844e04f7c1c901

SHA256
bc5ede3c33d78c77ac66d8d7e39b580b83ba609d8ecf39f5a09a6228ad8a92f7

SHA512
7818804cb8005c75d2dd382b45915c5b23e030471c1175ca628c310a8df49eb380da29df2976fd2f2e8f6f07491bd487083279cba043ed3600e54a1208a99ddc

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/usr/bin/bsd-port/getty

Filesize
1.2MB

MD5
99dd48584152704db970a7b536c47bd5

SHA1
eac36532779460580cd80e8f3d22e324bae71494

SHA256
544d2f9e21eb2892b5d2bd0135cb2b7a7e9d35983eed1ecbf45e71e89f4fb0a7

SHA512
34bcb7f4bbc1cb74f0ef6f6d8c04c12987d0d5756cf148cb79f7448891fc46c37d08a816ebb9e4fda3dc62befafc42aadd863956699cd2c82a35279e0bd94025

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/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

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads