mrblack | d8d522f2f72de16a235c17b6d32bad930d2a21a8c2664a76880c9b4b53ec1b58

Analysis

max time kernel
149s
max time network
150s
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
19-02-2024 15:04

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General

Target

2264f9e9ec3736a89b2cdf9a926c70ee.elf
Size

1.2MB
MD5

2264f9e9ec3736a89b2cdf9a926c70ee
SHA1

69684148423e3540f4f8c7bc787d102ea7b84db5
SHA256

d8d522f2f72de16a235c17b6d32bad930d2a21a8c2664a76880c9b4b53ec1b58
SHA512

39b6f2d778ce3c8832cfe13231edcc0a824c1f19aa6da5168cffd384edaaa033c75af87788ebc46087fbbe7b76d43b1c1f575d0b750d8e709616a903420d5461
SSDEEP

24576:e845rGHu6gVJKG75oFpA0VWeX4c2y1q2rJp0:745vRVJKGtSA0VWeoTu9p0

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	1587	getty
/usr/bin/.sshd	1619	.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/conf.n	Process not Found
File opened for modification	/usr/bin/bsd-port/udevd.lock	Process not Found
File opened for modification	/usr/bin/dpkgd/ps	cp
File opened for modification	/usr/bin/lsof	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/bsd-port/getty.lock	Process not Found
File opened for modification	/usr/bin/bsd-port/getty	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/arp
File opened for reading	/proc/net/dev
File opened for reading	/proc/net/route

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	mkdir
File opened for reading	/proc/meminfo	Process not Found
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	cp
File opened for reading	/proc/filesystems	mkdir
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	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/cmdline	insmod
File opened for reading	/proc/filesystems	mkdir
File opened for reading	/proc/filesystems	cp

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/2264f9e9ec3736a89b2cdf9a926c70ee.elf
/tmp/2264f9e9ec3736a89b2cdf9a926c70ee.elf
1⤵
PID:1555

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc1.d/S97DbSecuritySpt"
1⤵
PID:1560
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc1.d/S97DbSecuritySpt
  2⤵
  PID:1561

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc2.d/S97DbSecuritySpt"
1⤵
PID:1562
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc2.d/S97DbSecuritySpt
  2⤵
  PID:1563

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc3.d/S97DbSecuritySpt"
1⤵
PID:1564
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc3.d/S97DbSecuritySpt
  2⤵
  PID:1565

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc4.d/S97DbSecuritySpt"
1⤵
PID:1566
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc4.d/S97DbSecuritySpt
  2⤵
  PID:1567

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc5.d/S97DbSecuritySpt"
1⤵
PID:1568
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc5.d/S97DbSecuritySpt
  2⤵
  PID:1569

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

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

/bin/sh
sh -c "cp -f /tmp/2264f9e9ec3736a89b2cdf9a926c70ee.elf /usr/bin/bsd-port/getty"
1⤵
PID:1583
- /bin/cp
  cp -f /tmp/2264f9e9ec3736a89b2cdf9a926c70ee.elf /usr/bin/bsd-port/getty
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1584

/bin/sh
sh -c /usr/bin/bsd-port/getty
1⤵
PID:1586
- /usr/bin/bsd-port/getty
  /usr/bin/bsd-port/getty
  2⤵
  - Executes dropped EXE
  PID:1587

/bin/sh
sh -c "mkdir -p /usr/bin"
1⤵
PID:1589
- /bin/mkdir
  mkdir -p /usr/bin
  2⤵
  - Reads runtime system information
  PID:1590

/bin/sh
sh -c "mkdir -p /usr/bin"
1⤵
PID:1591
- /bin/mkdir
  mkdir -p /usr/bin
  2⤵
  - Reads runtime system information
  PID:1592

/bin/sh
sh -c "cp -f /tmp/2264f9e9ec3736a89b2cdf9a926c70ee.elf /usr/bin/.sshd"
1⤵
PID:1593
- /bin/cp
  cp -f /tmp/2264f9e9ec3736a89b2cdf9a926c70ee.elf /usr/bin/.sshd
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1594

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc1.d/S99selinux"
1⤵
PID:1603
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc1.d/S99selinux
  2⤵
  PID:1604

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc2.d/S99selinux"
1⤵
PID:1605
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc2.d/S99selinux
  2⤵
  PID:1606

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc3.d/S99selinux"
1⤵
PID:1607
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc3.d/S99selinux
  2⤵
  PID:1608

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc4.d/S99selinux"
1⤵
PID:1609
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc4.d/S99selinux
  2⤵
  PID:1610

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc5.d/S99selinux"
1⤵
PID:1611
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc5.d/S99selinux
  2⤵
  PID:1612

/bin/sh
sh -c "mkdir -p /usr/bin/dpkgd"
1⤵
PID:1613
- /bin/mkdir
  mkdir -p /usr/bin/dpkgd
  2⤵
  - Reads runtime system information
  PID:1614

/bin/sh
sh -c "cp -f /bin/ps /usr/bin/dpkgd/ps"
1⤵
PID:1615
- /bin/cp
  cp -f /bin/ps /usr/bin/dpkgd/ps
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1616

/bin/sh
sh -c /usr/bin/.sshd
1⤵
PID:1618
- /usr/bin/.sshd
  /usr/bin/.sshd
  2⤵
  - Executes dropped EXE
  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 "mkdir -p /bin"
1⤵
PID:1622
- /bin/mkdir
  mkdir -p /bin
  2⤵
  - Reads runtime system information
  PID:1623

/bin/sh
sh -c "cp -f /usr/bin/bsd-port/getty /bin/ps"
1⤵
PID:1624
- /bin/cp
  cp -f /usr/bin/bsd-port/getty /bin/ps
  2⤵
  - Writes file to system bin folder
  - Reads runtime system information
  PID:1625

/bin/sh
sh -c "chmod 0755 /bin/ps"
1⤵
PID:1626
- /bin/chmod
  chmod 0755 /bin/ps
  2⤵
  PID:1627

/bin/sh
sh -c "cp -f /bin/ss /usr/bin/dpkgd/ss"
1⤵
PID:1628
- /bin/cp
  cp -f /bin/ss /usr/bin/dpkgd/ss
  2⤵
  - Write file to user bin folder
  - 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 "mkdir -p /bin"
1⤵
PID:1632
- /bin/mkdir
  mkdir -p /bin
  2⤵
  - Reads runtime system information
  PID:1633

/bin/sh
sh -c "cp -f /usr/bin/bsd-port/getty /bin/ss"
1⤵
PID:1634
- /bin/cp
  cp -f /usr/bin/bsd-port/getty /bin/ss
  2⤵
  - Writes file to system bin folder
  - Reads runtime system information
  PID:1635

/bin/sh
sh -c "chmod 0755 /bin/ss"
1⤵
PID:1636
- /bin/chmod
  chmod 0755 /bin/ss
  2⤵
  PID:1637

/bin/sh
sh -c "cp -f /usr/bin/lsof /usr/bin/dpkgd/lsof"
1⤵
PID:1638
- /bin/cp
  cp -f /usr/bin/lsof /usr/bin/dpkgd/lsof
  2⤵
  - Write file to user bin folder
  - 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 "mkdir -p /usr/bin"
1⤵
PID:1642
- /bin/mkdir
  mkdir -p /usr/bin
  2⤵
  - Reads runtime system information
  PID:1643

/bin/sh
sh -c "cp -f /usr/bin/bsd-port/getty /usr/bin/lsof"
1⤵
PID:1644
- /bin/cp
  cp -f /usr/bin/bsd-port/getty /usr/bin/lsof
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1645

/bin/sh
sh -c "chmod 0755 /usr/bin/lsof"
1⤵
PID:1646
- /bin/chmod
  chmod 0755 /usr/bin/lsof
  2⤵
  PID:1647

/bin/sh
sh -c "insmod /usr/bin/bsd-port/xpacket.ko"
1⤵
PID:1660
- /sbin/insmod
  insmod /usr/bin/bsd-port/xpacket.ko
  2⤵
  - Reads runtime system information
  PID:1661

/bin/sh
sh -c "insmod /tmp/xpacket.ko"
1⤵
PID:1670
- /sbin/insmod
  insmod /tmp/xpacket.ko
  2⤵
  - Reads runtime system information
  PID:1671

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
54B

MD5
b4b40984c101c42544fe43f06ee4a211

SHA1
aec0d5d4cd65f9988e3b7078774500563ce17738

SHA256
62443a5c4caa359cfa685ba9422ab70093049c8a1162a6c266a2a3a4c0bdf4de

SHA512
bfac359a886ef8365230939405699d94b8cc2a8390039a902c0fdde817e388d340af536dd6f6a6e7e85333eb3a9c322ff019afa1ebd8d4f4493c2b85806ecddb

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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
4e9cec1f583056459111d63e24f3b8ef

SHA1
7c753b72486156bc11e7416305a9c87ada24439e

SHA256
46b724b2f85d4f7bd485423a04bcf2cffb2c22304fe264aa4da31794b7adae41

SHA512
62849303717bb0749a0977adba43667767a3f7c55b5ff17e57513c90c2dff495cf364e4f959887f9261e5e6b8aeda47b615189bfe44b1ca897e37fb3e43ee365

Download Submit
/tmp/moni.lod

Filesize
4B

MD5
7437d136770f5b35194cb46c1653efaa

SHA1
fcc78b5fcb5a7d9ea7f3b136af0efd88bc24500b

SHA256
a16c0ab260e30b22cd06fadf9a6a30c454ddc845925cc831796b2988874d6a5a

SHA512
1e66aa2b6d9287080dde2826252b5df22e7cf9cdf726f92226cf5982f1f362712e7c77f5629398f4a11e61524836044fa0aa4135e5a73834b3eab8d3b5d6c909

Download Submit
/tmp/notify.file

Filesize
41B

MD5
8dbc1f1a5cbacc05a1ca095ce87895b4

SHA1
fe8aa4b3895eee4d301fd2a5b24f3b8d3b1da46e

SHA256
8a23185213c461845dbcd6bcd7d8ef6be3e237ac572c50b22ce2c619f33babbe

SHA512
a94e3646060c0694a27736f5fa0067c6f7a345ca893e1734f1431d9a48ecff22c75450ee03f2e8310b3d834eb872c7b2166c6dd48921e16d32ae773acb146b35

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

Filesize
73B

MD5
1e45e1b3598ec16292269c28b19243f9

SHA1
a3b2cb046bccc74dd7a06667f53a97f525fce860

SHA256
83ea3bbfc2daeed1029dfc8a37cb3f0d70afdbda48a8e1eb659f605d7bfb8bbf

SHA512
d929fa04e2dd9d9ca5471bf7b25a7cf590c1087432ea4e8055e55f288a0587b1bb8e10cf90c8d53353c32a56ed9bdfeb027d841dac3fd98c42665e2f6b5ef8d9

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/usr/bin/bsd-port/getty

Filesize
1.2MB

MD5
2264f9e9ec3736a89b2cdf9a926c70ee

SHA1
69684148423e3540f4f8c7bc787d102ea7b84db5

SHA256
d8d522f2f72de16a235c17b6d32bad930d2a21a8c2664a76880c9b4b53ec1b58

SHA512
39b6f2d778ce3c8832cfe13231edcc0a824c1f19aa6da5168cffd384edaaa033c75af87788ebc46087fbbe7b76d43b1c1f575d0b750d8e709616a903420d5461

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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