mrblack | 7fd819ff6a69b045b0d7eb9900987dff73792a68acaa45cb0e2ef9298c5bba54

Analysis

max time kernel
151s
max time network
135s
platform
ubuntu-18.04_amd64
resource
ubuntu1804-amd64-20231222-en
resource tags

arch:amd64arch:i386image:ubuntu1804-amd64-20231222-enkernel:4.15.0-213-genericlocale:en-usos:ubuntu-18.04-amd64system
submitted
26-12-2023 17:07

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General

Target

7f0c9c24f2bd4145e923fe65bcdfd49c
Size

1.2MB
MD5

7f0c9c24f2bd4145e923fe65bcdfd49c
SHA1

ee482d0f762f102a86bd500c16b2586d3d20795c
SHA256

7fd819ff6a69b045b0d7eb9900987dff73792a68acaa45cb0e2ef9298c5bba54
SHA512

33a3ce0ee73f7ee07cb39955a8c29649578b4e38dbcd9d442dff725b97896bda1ba73bd816955f48c562925345c8790ec976a0b4e5a6cf1f93b2f2e91199b186
SSDEEP

24576:e845rGHu6gVJKG75oFpA0VWeX462y1q2rJp0:745vRVJKGtSA0VWeo5u9p0

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	1608	getty
/usr/bin/.sshd	1630	.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/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
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 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	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/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	mkdir
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	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/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/7f0c9c24f2bd4145e923fe65bcdfd49c
/tmp/7f0c9c24f2bd4145e923fe65bcdfd49c
1⤵
PID:1576

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc1.d/S97DbSecuritySpt"
1⤵
PID:1590
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc1.d/S97DbSecuritySpt
  2⤵
  PID:1591

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc2.d/S97DbSecuritySpt"
1⤵
PID:1592
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc2.d/S97DbSecuritySpt
  2⤵
  PID:1593

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc3.d/S97DbSecuritySpt"
1⤵
PID:1594
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc3.d/S97DbSecuritySpt
  2⤵
  PID:1595

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc4.d/S97DbSecuritySpt"
1⤵
PID:1596
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc4.d/S97DbSecuritySpt
  2⤵
  PID:1597

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc5.d/S97DbSecuritySpt"
1⤵
PID:1598
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc5.d/S97DbSecuritySpt
  2⤵
  PID:1599

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

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

/bin/sh
sh -c "cp -f /tmp/7f0c9c24f2bd4145e923fe65bcdfd49c /usr/bin/bsd-port/getty"
1⤵
PID:1604
- /bin/cp
  cp -f /tmp/7f0c9c24f2bd4145e923fe65bcdfd49c /usr/bin/bsd-port/getty
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1605

/bin/sh
sh -c /usr/bin/bsd-port/getty
1⤵
PID:1607
- /usr/bin/bsd-port/getty
  /usr/bin/bsd-port/getty
  2⤵
  - Executes dropped EXE
  PID:1608

/bin/sh
sh -c "mkdir -p /usr/bin"
1⤵
PID:1610
- /bin/mkdir
  mkdir -p /usr/bin
  2⤵
  - Reads runtime system information
  PID:1611

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

/bin/sh
sh -c "cp -f /tmp/7f0c9c24f2bd4145e923fe65bcdfd49c /usr/bin/.sshd"
1⤵
PID:1614
- /bin/cp
  cp -f /tmp/7f0c9c24f2bd4145e923fe65bcdfd49c /usr/bin/.sshd
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1615

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc1.d/S99selinux"
1⤵
PID:1616
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc1.d/S99selinux
  2⤵
  PID:1617

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc2.d/S99selinux"
1⤵
PID:1618
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc2.d/S99selinux
  2⤵
  PID:1619

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc3.d/S99selinux"
1⤵
PID:1620
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc3.d/S99selinux
  2⤵
  PID:1621

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc4.d/S99selinux"
1⤵
PID:1622
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc4.d/S99selinux
  2⤵
  PID:1623

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc5.d/S99selinux"
1⤵
PID:1624
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc5.d/S99selinux
  2⤵
  PID:1625

/bin/sh
sh -c "mkdir -p /usr/bin/dpkgd"
1⤵
PID:1626
- /bin/mkdir
  mkdir -p /usr/bin/dpkgd
  2⤵
  - Reads runtime system information
  PID:1627

/bin/sh
sh -c /usr/bin/.sshd
1⤵
PID:1629
- /usr/bin/.sshd
  /usr/bin/.sshd
  2⤵
  - Executes dropped EXE
  PID:1630

/bin/sh
sh -c "cp -f /bin/ps /usr/bin/dpkgd/ps"
1⤵
PID:1631
- /bin/cp
  cp -f /bin/ps /usr/bin/dpkgd/ps
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1632

/bin/sh
sh -c "mkdir -p /bin"
1⤵
PID:1633
- /bin/mkdir
  mkdir -p /bin
  2⤵
  - Reads runtime system information
  PID:1634

/bin/sh
sh -c "mkdir -p /bin"
1⤵
PID:1635
- /bin/mkdir
  mkdir -p /bin
  2⤵
  - Reads runtime system information
  PID:1636

/bin/sh
sh -c "cp -f /usr/bin/bsd-port/getty /bin/ps"
1⤵
PID:1637
- /bin/cp
  cp -f /usr/bin/bsd-port/getty /bin/ps
  2⤵
  - Writes file to system bin folder
  - Reads runtime system information
  PID:1638

/bin/sh
sh -c "chmod 0755 /bin/ps"
1⤵
PID:1639
- /bin/chmod
  chmod 0755 /bin/ps
  2⤵
  PID:1640

/bin/sh
sh -c "cp -f /bin/ss /usr/bin/dpkgd/ss"
1⤵
PID:1641
- /bin/cp
  cp -f /bin/ss /usr/bin/dpkgd/ss
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1642

/bin/sh
sh -c "mkdir -p /bin"
1⤵
PID:1643
- /bin/mkdir
  mkdir -p /bin
  2⤵
  - Reads runtime system information
  PID:1644

/bin/sh
sh -c "mkdir -p /bin"
1⤵
PID:1645
- /bin/mkdir
  mkdir -p /bin
  2⤵
  - Reads runtime system information
  PID:1646

/bin/sh
sh -c "cp -f /usr/bin/bsd-port/getty /bin/ss"
1⤵
PID:1647
- /bin/cp
  cp -f /usr/bin/bsd-port/getty /bin/ss
  2⤵
  - Writes file to system bin folder
  - Reads runtime system information
  PID:1648

/bin/sh
sh -c "chmod 0755 /bin/ss"
1⤵
PID:1649
- /bin/chmod
  chmod 0755 /bin/ss
  2⤵
  PID:1650

/bin/sh
sh -c "cp -f /usr/bin/lsof /usr/bin/dpkgd/lsof"
1⤵
PID:1651
- /bin/cp
  cp -f /usr/bin/lsof /usr/bin/dpkgd/lsof
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1652

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

/bin/sh
sh -c "mkdir -p /usr/bin"
1⤵
PID:1655
- /bin/mkdir
  mkdir -p /usr/bin
  2⤵
  - Reads runtime system information
  PID:1656

/bin/sh
sh -c "cp -f /usr/bin/bsd-port/getty /usr/bin/lsof"
1⤵
PID:1657
- /bin/cp
  cp -f /usr/bin/bsd-port/getty /usr/bin/lsof
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1658

/bin/sh
sh -c "chmod 0755 /usr/bin/lsof"
1⤵
PID:1659
- /bin/chmod
  chmod 0755 /usr/bin/lsof
  2⤵
  PID:1660

/bin/sh
sh -c "insmod /usr/bin/bsd-port/xpacket.ko"
1⤵
PID:1663
- /sbin/insmod
  insmod /usr/bin/bsd-port/xpacket.ko
  2⤵
  - Reads runtime system information
  PID:1664

/bin/sh
sh -c "insmod /tmp/xpacket.ko"
1⤵
PID:1666
- /sbin/insmod
  insmod /tmp/xpacket.ko
  2⤵
  - Reads runtime system information
  PID:1667

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
ae8f32712d7c1a2e7764ea5ff6558743

SHA1
180f1d192073e9666316660a54e86a5c0c077ff1

SHA256
5075f90b9cd82dbe868164b4b01805510a986a23a8132516fcac6f48e4d50a7c

SHA512
19198a18a1af98ad38b1f3d1415918344284a740bc42b39ea91fc82fb7640e1f36d725fd4bfc11bddb6d49863d2ef702ebc13150b24437b2ce75abef2b3159d6

Download Submit
/etc/init.d/selinux

Filesize
36B

MD5
993cc15058142d96c3daf7852c3d5ee8

SHA1
0950b8b391b04dd3895ea33cd3141543ebd2525d

SHA256
8171d077918611803d93088409f220c66fae1c670b297e1aa5d8cbd548ce9208

SHA512
0c4256c00a3710f97e92581b552682b36b62afc35fe72622c491323c618c19ea62611ac04ccafc3dfcde2254a2ebbd93b69b66795b16e36332293bed83adb928

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/tmp/gates.lod

Filesize
4B

MD5
7e1d842d0f7ee600116ffc6b2d87d83f

SHA1
58cb004c78ad7dd27552600c7c1d525e5797cd1d

SHA256
1d16bb3354a11b509e641db094ca078be290298b0ec32c6b46b88fe919a1a8ed

SHA512
113c6380957062e07ff7390ef365b7352fa3e96dabb6503422821a7de921d40296db514ff99bf85f780aee8486787810184d16106a8a7ccdc92423e23bf31575

Download Submit
/tmp/moni.lod

Filesize
4B

MD5
7d12b66d3df6af8d429c1a357d8b9e1a

SHA1
5c5a56a1d11d0a2e27797f751519fa1fdaa28e16

SHA256
8429476daf79869660e1228853868ae86ae9ec97893d38ae2be5ac85618d9082

SHA512
c877003735c8ad7e442384f40584d4d42b317d4f3e2c0d17d50ac82b4061966995c306c411b5fbb74cb6a0373b1493d3f3bafa4e85ce35a1921d028a4bd322c4

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/tmp/notify.file

Filesize
37B

MD5
76b38b7b44d81c861c723be729a31423

SHA1
1ce0c29fa01b1e8420a5d625d72fae3906f35411

SHA256
1e534188847c57384c26d7c5b1e28b680ed3ade584c3c221b63344643716ef5c

SHA512
468bb95f013396bc5fe33c6e881ec6eeecda62334259956c53b152e2e5e7b882d07559d21a3cba5c2a5a6bc584481d9d19810d35036d1aaebabc34c22f32e3af

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/usr/bin/bsd-port/getty

Filesize
1.2MB

MD5
7f0c9c24f2bd4145e923fe65bcdfd49c

SHA1
ee482d0f762f102a86bd500c16b2586d3d20795c

SHA256
7fd819ff6a69b045b0d7eb9900987dff73792a68acaa45cb0e2ef9298c5bba54

SHA512
33a3ce0ee73f7ee07cb39955a8c29649578b4e38dbcd9d442dff725b97896bda1ba73bd816955f48c562925345c8790ec976a0b4e5a6cf1f93b2f2e91199b186

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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