mrblack | da150723a7cf0cd194c4895181a90d755fc8453d6e23fee4b6a6c687547a638b

Analysis

max time kernel
153s
max time network
155s
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 09:44

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General

Target

8250a386b5bd2c1fca99f12ab8964d67
Size

1.2MB
MD5

8250a386b5bd2c1fca99f12ab8964d67
SHA1

636f4f56d06da34fee28077360e5f077b47e5188
SHA256

da150723a7cf0cd194c4895181a90d755fc8453d6e23fee4b6a6c687547a638b
SHA512

ca853322ccbd81dd16fe609087971a7f3ef099d8497bbc959be385f81771d73e75a40fbfe112b730ed8fb8bfbf8c8164766b17462b371e2bc833d7680fd74096
SSDEEP

24576:e845rlHu6gVJKG75oFpA0VWdX4G2y1q2rJp0:745wRVJKGtSA0VWdoVu9p0

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	1577	getty
/usr/bin/.sshd	1593	.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.lock	Process not Found
File opened for modification	/usr/bin/bsd-port/udevd.lock	Process not Found
File opened for modification	/usr/bin/lsof	cp
File opened for modification	/usr/bin/bsd-port/conf.n	Process not Found
File opened for modification	/usr/bin/dpkgd/lsof	cp
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

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

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/8250a386b5bd2c1fca99f12ab8964d67
/tmp/8250a386b5bd2c1fca99f12ab8964d67
1⤵
PID:1553

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc1.d/S97DbSecuritySpt"
1⤵
PID:1559
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc1.d/S97DbSecuritySpt
  2⤵
  PID:1560

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc2.d/S97DbSecuritySpt"
1⤵
PID:1561
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc2.d/S97DbSecuritySpt
  2⤵
  PID:1562

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc3.d/S97DbSecuritySpt"
1⤵
PID:1563
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc3.d/S97DbSecuritySpt
  2⤵
  PID:1564

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc4.d/S97DbSecuritySpt"
1⤵
PID:1565
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc4.d/S97DbSecuritySpt
  2⤵
  PID:1566

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc5.d/S97DbSecuritySpt"
1⤵
PID:1567
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc5.d/S97DbSecuritySpt
  2⤵
  PID:1568

/bin/sh
sh -c "mkdir -p /usr/bin/bsd-port"
1⤵
PID:1569
- /bin/mkdir
  mkdir -p /usr/bin/bsd-port
  2⤵
  - Reads runtime system information
  PID:1570

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

/bin/sh
sh -c "cp -f /tmp/8250a386b5bd2c1fca99f12ab8964d67 /usr/bin/bsd-port/getty"
1⤵
PID:1573
- /bin/cp
  cp -f /tmp/8250a386b5bd2c1fca99f12ab8964d67 /usr/bin/bsd-port/getty
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1574

/bin/sh
sh -c /usr/bin/bsd-port/getty
1⤵
PID:1576
- /usr/bin/bsd-port/getty
  /usr/bin/bsd-port/getty
  2⤵
  - Executes dropped EXE
  PID:1577

/bin/sh
sh -c "mkdir -p /usr/bin"
1⤵
PID:1579
- /bin/mkdir
  mkdir -p /usr/bin
  2⤵
  - Reads runtime system information
  PID:1580

/bin/sh
sh -c "mkdir -p /usr/bin"
1⤵
PID:1581
- /bin/mkdir
  mkdir -p /usr/bin
  2⤵
  - Reads runtime system information
  PID:1582

/bin/sh
sh -c "cp -f /tmp/8250a386b5bd2c1fca99f12ab8964d67 /usr/bin/.sshd"
1⤵
PID:1583
- /bin/cp
  cp -f /tmp/8250a386b5bd2c1fca99f12ab8964d67 /usr/bin/.sshd
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1584

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc1.d/S99selinux"
1⤵
PID:1585
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc1.d/S99selinux
  2⤵
  PID:1586

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc2.d/S99selinux"
1⤵
PID:1587
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc2.d/S99selinux
  2⤵
  PID:1588

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc3.d/S99selinux"
1⤵
PID:1589
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc3.d/S99selinux
  2⤵
  PID:1590

/bin/sh
sh -c /usr/bin/.sshd
1⤵
PID:1592
- /usr/bin/.sshd
  /usr/bin/.sshd
  2⤵
  - Executes dropped EXE
  PID:1593

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc4.d/S99selinux"
1⤵
PID:1594
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc4.d/S99selinux
  2⤵
  PID:1595

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc5.d/S99selinux"
1⤵
PID:1596
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc5.d/S99selinux
  2⤵
  PID:1597

/bin/sh
sh -c "mkdir -p /usr/bin/dpkgd"
1⤵
PID:1598
- /bin/mkdir
  mkdir -p /usr/bin/dpkgd
  2⤵
  - Reads runtime system information
  PID:1599

/bin/sh
sh -c "cp -f /bin/ps /usr/bin/dpkgd/ps"
1⤵
PID:1600
- /bin/cp
  cp -f /bin/ps /usr/bin/dpkgd/ps
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1601

/bin/sh
sh -c "mkdir -p /bin"
1⤵
PID:1602
- /bin/mkdir
  mkdir -p /bin
  2⤵
  - 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 "cp -f /usr/bin/bsd-port/getty /bin/ps"
1⤵
PID:1606
- /bin/cp
  cp -f /usr/bin/bsd-port/getty /bin/ps
  2⤵
  - Writes file to system bin folder
  - Reads runtime system information
  PID:1607

/bin/sh
sh -c "chmod 0755 /bin/ps"
1⤵
PID:1608
- /bin/chmod
  chmod 0755 /bin/ps
  2⤵
  PID:1609

/bin/sh
sh -c "cp -f /bin/ss /usr/bin/dpkgd/ss"
1⤵
PID:1610
- /bin/cp
  cp -f /bin/ss /usr/bin/dpkgd/ss
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1611

/bin/sh
sh -c "mkdir -p /bin"
1⤵
PID:1612
- /bin/mkdir
  mkdir -p /bin
  2⤵
  - Reads runtime system information
  PID:1613

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

/bin/sh
sh -c "cp -f /usr/bin/bsd-port/getty /bin/ss"
1⤵
PID:1616
- /bin/cp
  cp -f /usr/bin/bsd-port/getty /bin/ss
  2⤵
  - Writes file to system bin folder
  - Reads runtime system information
  PID:1617

/bin/sh
sh -c "chmod 0755 /bin/ss"
1⤵
PID:1618
- /bin/chmod
  chmod 0755 /bin/ss
  2⤵
  PID:1619

/bin/sh
sh -c "cp -f /usr/bin/lsof /usr/bin/dpkgd/lsof"
1⤵
PID:1620
- /bin/cp
  cp -f /usr/bin/lsof /usr/bin/dpkgd/lsof
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1621

/bin/sh
sh -c "mkdir -p /usr/bin"
1⤵
PID:1622
- /bin/mkdir
  mkdir -p /usr/bin
  2⤵
  - Reads runtime system information
  PID:1623

/bin/sh
sh -c "mkdir -p /usr/bin"
1⤵
PID:1624
- /bin/mkdir
  mkdir -p /usr/bin
  2⤵
  - Reads runtime system information
  PID:1625

/bin/sh
sh -c "cp -f /usr/bin/bsd-port/getty /usr/bin/lsof"
1⤵
PID:1626
- /bin/cp
  cp -f /usr/bin/bsd-port/getty /usr/bin/lsof
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1627

/bin/sh
sh -c "chmod 0755 /usr/bin/lsof"
1⤵
PID:1628
- /bin/chmod
  chmod 0755 /usr/bin/lsof
  2⤵
  PID:1629

/bin/sh
sh -c "insmod /usr/bin/bsd-port/xpacket.ko"
1⤵
PID:1632
- /sbin/insmod
  insmod /usr/bin/bsd-port/xpacket.ko
  2⤵
  - Reads runtime system information
  PID:1634

/bin/sh
sh -c "insmod /tmp/xpacket.ko"
1⤵
PID:1633
- /sbin/insmod
  insmod /tmp/xpacket.ko
  2⤵
  - Reads runtime system information
  PID:1635

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
fece7e4bdd042e7f6ddf8b8fdab94bfa

SHA1
07f964346781ef2644befc98b6925516a3e6588e

SHA256
3dc0a40ec3a1ee5c94137744b6ffa7bf03619bcb0a1bb8134a55639eade7fcac

SHA512
81ffb29b7412277dc526c5e6f3576de7ec448d473feb0578e6c89261415c40b38af0f6dc0e1ed875b6a150b86b2c3df2641517017d10368a71b7458b3e8e5276

Download Submit
/etc/init.d/selinux

Filesize
36B

MD5
993cc15058142d96c3daf7852c3d5ee8

SHA1
0950b8b391b04dd3895ea33cd3141543ebd2525d

SHA256
8171d077918611803d93088409f220c66fae1c670b297e1aa5d8cbd548ce9208

SHA512
0c4256c00a3710f97e92581b552682b36b62afc35fe72622c491323c618c19ea62611ac04ccafc3dfcde2254a2ebbd93b69b66795b16e36332293bed83adb928

Download Submit
/tmp/gates.lod

Filesize
4B

MD5
98986c005e5def2da341b4e0627d4712

SHA1
ba2e8aa59e4161ee5807078f7226c405fde751a6

SHA256
6fb4775fed7293b1da12333ce782e879cefce4ca3b83e12628b1a54e062606b6

SHA512
039aae6dbb53263f8868d777e1b3766bee4488c2d9812c3eb5ae692d7be4cea0314860458b3b32440627133cf4a2b1e63c5773120b90b028220db0eca878c09c

Download Submit
/tmp/moni.lod

Filesize
4B

MD5
46031b3d04dc90994ca317a7c55c4289

SHA1
f754e904dfc75ae544977f3f441a1d1b486392cc

SHA256
e1406f532a84b02f7b7645f2c4041c0dc25c70f10a5f0bb769efa589bcbf492f

SHA512
ccec4cd007a0fe28a2ed3a43652ea04d7bac487bcf51eec51c558e7804daec7bf63daccf3a477cc818699f499ec99953e6ec8ebc15a6824361a6969ac0ff8279

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/tmp/notify.file

Filesize
37B

MD5
4c16b2c78aaf0bebd8782936ce3d69cd

SHA1
abba5b991ba92bd267a258f437f4ebca81929b33

SHA256
f497498ebd13529e1ebf366298be8e6f173967a83def920ed90d9da522e3f3b3

SHA512
2e7c83d3f2c9311fd96276cd8491ab4aaed2fa4407d9814b68a295063cc6813612baceabddc7f3b7c7d58211631de4880e4400b04ee64cb68703b5d7218b7722

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

Filesize
73B

MD5
697b3decb0f940305e4da542160b1ec0

SHA1
e78b42ae02c1cbc32ae20a73880fb40e9152e4bb

SHA256
299121d3d5bb6439cab230e736f636fadbef2ee8d7c6144f1454a6564d4e46bd

SHA512
3f61dc6f66731dbd7122c75040dcc147924b524f773830b7ec180bf31b0ece2ba041a5e07c7dd22ba2940a07b8f691dfe983c38ecb2cb0ccc35ed155b8c50cdb

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/usr/bin/bsd-port/getty

Filesize
1.2MB

MD5
8250a386b5bd2c1fca99f12ab8964d67

SHA1
636f4f56d06da34fee28077360e5f077b47e5188

SHA256
da150723a7cf0cd194c4895181a90d755fc8453d6e23fee4b6a6c687547a638b

SHA512
ca853322ccbd81dd16fe609087971a7f3ef099d8497bbc959be385f81771d73e75a40fbfe112b730ed8fb8bfbf8c8164766b17462b371e2bc833d7680fd74096

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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