mrblack | 1ef42d19e82334cb4d078064b18e8284088dfe9161a7a73a1d9008f4d4bd7262

Analysis

max time kernel
153s
max time network
130s
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
19-12-2023 22:34

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General

Target

14c5a533a65d480a06439c9fdab1397e
Size

1.2MB
MD5

14c5a533a65d480a06439c9fdab1397e
SHA1

283c5c1df4d74c06b8e154a239af1454a50d2367
SHA256

1ef42d19e82334cb4d078064b18e8284088dfe9161a7a73a1d9008f4d4bd7262
SHA512

d4040b0da57a2b059c91710d25a0b4c1cad28e6aa29c9eefda65b95c0dc3d13a302ffad6b919102138fbf3a580d1fe462e8c72966f24fa341a07d8a29675057d
SSDEEP

24576:e845rGHu6gVJKG75oFpA0VWeX442y1q2rJp0:745vRVJKGtSA0VWeofu9p0

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	1593	getty
/usr/bin/.sshd	1608	.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

Write file to user bin folder 1 TTPs 8 IoCs

Hijack Execution Flow

T1574

description	ioc	Process
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
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

Writes file to system bin folder 1 TTPs 2 IoCs

Hijack Execution Flow

T1574

description	ioc	Process
File opened for modification	/bin/ss	cp
File opened for modification	/bin/ps	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	mkdir
File opened for reading	/proc/filesystems	cp
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	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	cp
File opened for reading	/proc/stat	Process not Found
File opened for reading	/proc/cmdline	insmod
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/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

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/14c5a533a65d480a06439c9fdab1397e
/tmp/14c5a533a65d480a06439c9fdab1397e
1⤵
PID:1560

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc1.d/S97DbSecuritySpt"
1⤵
PID:1575
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc1.d/S97DbSecuritySpt
  2⤵
  PID:1576

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc2.d/S97DbSecuritySpt"
1⤵
PID:1577
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc2.d/S97DbSecuritySpt
  2⤵
  PID:1578

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc3.d/S97DbSecuritySpt"
1⤵
PID:1579
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc3.d/S97DbSecuritySpt
  2⤵
  PID:1580

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc4.d/S97DbSecuritySpt"
1⤵
PID:1581
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc4.d/S97DbSecuritySpt
  2⤵
  PID:1582

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc5.d/S97DbSecuritySpt"
1⤵
PID:1583
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc5.d/S97DbSecuritySpt
  2⤵
  PID:1584

/bin/sh
sh -c "mkdir -p /usr/bin/bsd-port"
1⤵
PID:1585
- /bin/mkdir
  mkdir -p /usr/bin/bsd-port
  2⤵
  - Reads runtime system information
  PID:1586

/bin/sh
sh -c "mkdir -p /usr/bin/bsd-port"
1⤵
PID:1587
- /bin/mkdir
  mkdir -p /usr/bin/bsd-port
  2⤵
  - Reads runtime system information
  PID:1588

/bin/sh
sh -c "cp -f /tmp/14c5a533a65d480a06439c9fdab1397e /usr/bin/bsd-port/getty"
1⤵
PID:1589
- /bin/cp
  cp -f /tmp/14c5a533a65d480a06439c9fdab1397e /usr/bin/bsd-port/getty
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1590

/bin/sh
sh -c /usr/bin/bsd-port/getty
1⤵
PID:1592
- /usr/bin/bsd-port/getty
  /usr/bin/bsd-port/getty
  2⤵
  - Executes dropped EXE
  PID:1593

/bin/sh
sh -c "mkdir -p /usr/bin"
1⤵
PID:1595
- /bin/mkdir
  mkdir -p /usr/bin
  2⤵
  - Reads runtime system information
  PID:1596

/bin/sh
sh -c "mkdir -p /usr/bin"
1⤵
PID:1597
- /bin/mkdir
  mkdir -p /usr/bin
  2⤵
  - Reads runtime system information
  PID:1598

/bin/sh
sh -c "cp -f /tmp/14c5a533a65d480a06439c9fdab1397e /usr/bin/.sshd"
1⤵
PID:1599
- /bin/cp
  cp -f /tmp/14c5a533a65d480a06439c9fdab1397e /usr/bin/.sshd
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1600

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc1.d/S99selinux"
1⤵
PID:1601
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc1.d/S99selinux
  2⤵
  PID:1602

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc2.d/S99selinux"
1⤵
PID:1603
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc2.d/S99selinux
  2⤵
  PID:1604

/bin/sh
sh -c /usr/bin/.sshd
1⤵
PID:1607
- /usr/bin/.sshd
  /usr/bin/.sshd
  2⤵
  - Executes dropped EXE
  PID:1608

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc3.d/S99selinux"
1⤵
PID:1605
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc3.d/S99selinux
  2⤵
  PID:1609

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc4.d/S99selinux"
1⤵
PID:1610
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc4.d/S99selinux
  2⤵
  PID:1611

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc5.d/S99selinux"
1⤵
PID:1612
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc5.d/S99selinux
  2⤵
  PID:1613

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

/bin/sh
sh -c "cp -f /bin/ps /usr/bin/dpkgd/ps"
1⤵
PID:1616
- /bin/cp
  cp -f /bin/ps /usr/bin/dpkgd/ps
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1617

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

/bin/sh
sh -c "mkdir -p /bin"
1⤵
PID:1620
- /bin/mkdir
  mkdir -p /bin
  2⤵
  - Reads runtime system information
  PID:1621

/bin/sh
sh -c "cp -f /usr/bin/bsd-port/getty /bin/ps"
1⤵
PID:1622
- /bin/cp
  cp -f /usr/bin/bsd-port/getty /bin/ps
  2⤵
  - Writes file to system bin folder
  - Reads runtime system information
  PID:1623

/bin/sh
sh -c "chmod 0755 /bin/ps"
1⤵
PID:1624
- /bin/chmod
  chmod 0755 /bin/ps
  2⤵
  PID:1625

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

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

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

/bin/sh
sh -c "cp -f /usr/bin/bsd-port/getty /bin/ss"
1⤵
PID:1632
- /bin/cp
  cp -f /usr/bin/bsd-port/getty /bin/ss
  2⤵
  - Writes file to system bin folder
  - Reads runtime system information
  PID:1633

/bin/sh
sh -c "chmod 0755 /bin/ss"
1⤵
PID:1634
- /bin/chmod
  chmod 0755 /bin/ss
  2⤵
  PID:1635

/bin/sh
sh -c "cp -f /usr/bin/lsof /usr/bin/dpkgd/lsof"
1⤵
PID:1636
- /bin/cp
  cp -f /usr/bin/lsof /usr/bin/dpkgd/lsof
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1637

/bin/sh
sh -c "mkdir -p /usr/bin"
1⤵
PID:1638
- /bin/mkdir
  mkdir -p /usr/bin
  2⤵
  - Reads runtime system information
  PID:1639

/bin/sh
sh -c "mkdir -p /usr/bin"
1⤵
PID:1640
- /bin/mkdir
  mkdir -p /usr/bin
  2⤵
  - Reads runtime system information
  PID:1641

/bin/sh
sh -c "cp -f /usr/bin/bsd-port/getty /usr/bin/lsof"
1⤵
PID:1642
- /bin/cp
  cp -f /usr/bin/bsd-port/getty /usr/bin/lsof
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1643

/bin/sh
sh -c "chmod 0755 /usr/bin/lsof"
1⤵
PID:1645
- /bin/chmod
  chmod 0755 /usr/bin/lsof
  2⤵
  PID:1647

/bin/sh
sh -c "insmod /tmp/xpacket.ko"
1⤵
PID:1648
- /sbin/insmod
  insmod /tmp/xpacket.ko
  2⤵
  - Reads runtime system information
  PID:1649

/bin/sh
sh -c "insmod /usr/bin/bsd-port/xpacket.ko"
1⤵
PID:1651
- /sbin/insmod
  insmod /usr/bin/bsd-port/xpacket.ko
  2⤵
  - Reads runtime system information
  PID:1652

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
ea7190f9fd54805b0181683f2790194c

SHA1
b53b676784af594bf1221748ec5866a139111129

SHA256
ac510275a00888954fa6f35c42d8b5db0c0c55762a272028135879dcdbb4391a

SHA512
f834fe8a520ad967cb9b0412673d326e522d43f8eba3258d5c0e8bac6e7c132c62f333036ef4a8ea63288b8efc5182e392ac7dbe47a4b54451f4829b8faedc09

Download Submit
/etc/init.d/selinux

Filesize
36B

MD5
993cc15058142d96c3daf7852c3d5ee8

SHA1
0950b8b391b04dd3895ea33cd3141543ebd2525d

SHA256
8171d077918611803d93088409f220c66fae1c670b297e1aa5d8cbd548ce9208

SHA512
0c4256c00a3710f97e92581b552682b36b62afc35fe72622c491323c618c19ea62611ac04ccafc3dfcde2254a2ebbd93b69b66795b16e36332293bed83adb928

Download Submit
/tmp/gates.lod

Filesize
4B

MD5
b132ecc1609bfcf302615847c1caa69a

SHA1
0310477142171b7d67f2a1cd85c90a3b66be9c57

SHA256
8bcefa497af26e688b555d1c4c8cc97365522b5a1416ceb099a98b4c2ed80585

SHA512
816f74839aff001255a4e3fdbc354fd23aeaada1bbd44148e4fad015650143c818f741024cac050b6a4e22ce4d8d64b9591078a1d46d4776a6c51077b937bed0

Download Submit
/tmp/moni.lod

Filesize
4B

MD5
89f03f7d02720160f1b04cf5b27f5ccb

SHA1
cbf641003962d3b22ea5aeb9164c4cff46a13515

SHA256
f7d9615965e2b49c6bde79dedfdecc39afade6e543922d5d023fda9d13430c44

SHA512
b86aa582e4cbffc73c377a673ee2364627f267fe71a97a95b1cfcbb2c79373da88190563f456a178d9d734daeeb5f1e12df41d61ce6c4b50cbcd03f506cb0642

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/tmp/notify.file

Filesize
37B

MD5
5b62c40ed5a3a6ca99eca11b15d15133

SHA1
5ee1e0ebf794536c2d05ca4893eb686ad5d312d0

SHA256
c94137bc0aeb2d76e1d1de631dd20bd8b14ee0c5fe8e20d768bca3fe1a55a47c

SHA512
2bbc51652fbb40d75be9bf14e31f84516e988dbaba02df258c66f3d6f6ddba109abe7f4b79883b246dd2291d41bd3e9bf0d87233b666b43723c60aa5f763dfee

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/usr/bin/bsd-port/getty

Filesize
1.2MB

MD5
14c5a533a65d480a06439c9fdab1397e

SHA1
283c5c1df4d74c06b8e154a239af1454a50d2367

SHA256
1ef42d19e82334cb4d078064b18e8284088dfe9161a7a73a1d9008f4d4bd7262

SHA512
d4040b0da57a2b059c91710d25a0b4c1cad28e6aa29c9eefda65b95c0dc3d13a302ffad6b919102138fbf3a580d1fe462e8c72966f24fa341a07d8a29675057d

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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

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