mrblack | 85b18a45a5f12da6da29c734f8120baf0278ea742545861bda7cc8cff161ef85

Analysis

max time kernel
156s
max time network
161s
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 14:42

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General

Target

c8a06a490fc859f2f3d5876ffb93a01a
Size

1.2MB
MD5

c8a06a490fc859f2f3d5876ffb93a01a
SHA1

e209828fe9ae7f0ac8011db43f1b62e079f10c6b
SHA256

85b18a45a5f12da6da29c734f8120baf0278ea742545861bda7cc8cff161ef85
SHA512

a47b74dee1e047fa9f74b90e806a2d412f43aa8542e6c52da84211fca7f87424f0ef4700cebf45205bbbc0ac3df4edf40b0fa50c9819c79c8561683e99f6143f
SSDEEP

24576:e845rGHu6gVJKG75oFpA0VWIX4E2y1q2rJp0:745vRVJKGtSA0VWIoLu9p0

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	1560	getty
/usr/bin/.sshd	1576	.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/lsof	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/.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

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	mkdir
File opened for reading	/proc/filesystems	mkdir
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	cp
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	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/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/stat	Process not Found

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/c8a06a490fc859f2f3d5876ffb93a01a
/tmp/c8a06a490fc859f2f3d5876ffb93a01a
1⤵
PID:1537

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc1.d/S97DbSecuritySpt"
1⤵
PID:1542
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc1.d/S97DbSecuritySpt
  2⤵
  PID:1543

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc2.d/S97DbSecuritySpt"
1⤵
PID:1544
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc2.d/S97DbSecuritySpt
  2⤵
  PID:1545

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc3.d/S97DbSecuritySpt"
1⤵
PID:1546
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc3.d/S97DbSecuritySpt
  2⤵
  PID:1547

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc4.d/S97DbSecuritySpt"
1⤵
PID:1548
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc4.d/S97DbSecuritySpt
  2⤵
  PID:1549

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc5.d/S97DbSecuritySpt"
1⤵
PID:1550
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc5.d/S97DbSecuritySpt
  2⤵
  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 "mkdir -p /usr/bin/bsd-port"
1⤵
PID:1554
- /bin/mkdir
  mkdir -p /usr/bin/bsd-port
  2⤵
  - Reads runtime system information
  PID:1555

/bin/sh
sh -c "cp -f /tmp/c8a06a490fc859f2f3d5876ffb93a01a /usr/bin/bsd-port/getty"
1⤵
PID:1556
- /bin/cp
  cp -f /tmp/c8a06a490fc859f2f3d5876ffb93a01a /usr/bin/bsd-port/getty
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1557

/bin/sh
sh -c /usr/bin/bsd-port/getty
1⤵
PID:1559
- /usr/bin/bsd-port/getty
  /usr/bin/bsd-port/getty
  2⤵
  - Executes dropped EXE
  PID:1560

/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 "mkdir -p /usr/bin"
1⤵
PID:1564
- /bin/mkdir
  mkdir -p /usr/bin
  2⤵
  - Reads runtime system information
  PID:1565

/bin/sh
sh -c "cp -f /tmp/c8a06a490fc859f2f3d5876ffb93a01a /usr/bin/.sshd"
1⤵
PID:1566
- /bin/cp
  cp -f /tmp/c8a06a490fc859f2f3d5876ffb93a01a /usr/bin/.sshd
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1567

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc1.d/S99selinux"
1⤵
PID:1568
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc1.d/S99selinux
  2⤵
  PID:1569

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc2.d/S99selinux"
1⤵
PID:1570
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc2.d/S99selinux
  2⤵
  PID:1571

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc3.d/S99selinux"
1⤵
PID:1572
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc3.d/S99selinux
  2⤵
  PID:1573

/bin/sh
sh -c /usr/bin/.sshd
1⤵
PID:1575
- /usr/bin/.sshd
  /usr/bin/.sshd
  2⤵
  - Executes dropped EXE
  PID:1576

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc4.d/S99selinux"
1⤵
PID:1577
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc4.d/S99selinux
  2⤵
  PID:1578

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc5.d/S99selinux"
1⤵
PID:1579
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc5.d/S99selinux
  2⤵
  PID:1580

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

/bin/sh
sh -c "cp -f /bin/ps /usr/bin/dpkgd/ps"
1⤵
PID:1583
- /bin/cp
  cp -f /bin/ps /usr/bin/dpkgd/ps
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1584

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

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

/bin/sh
sh -c "cp -f /usr/bin/bsd-port/getty /bin/ps"
1⤵
PID:1589
- /bin/cp
  cp -f /usr/bin/bsd-port/getty /bin/ps
  2⤵
  - Writes file to system bin folder
  - Reads runtime system information
  PID:1590

/bin/sh
sh -c "chmod 0755 /bin/ps"
1⤵
PID:1591
- /bin/chmod
  chmod 0755 /bin/ps
  2⤵
  PID:1592

/bin/sh
sh -c "cp -f /bin/ss /usr/bin/dpkgd/ss"
1⤵
PID:1593
- /bin/cp
  cp -f /bin/ss /usr/bin/dpkgd/ss
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1594

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

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

/bin/sh
sh -c "cp -f /usr/bin/bsd-port/getty /bin/ss"
1⤵
PID:1599
- /bin/cp
  cp -f /usr/bin/bsd-port/getty /bin/ss
  2⤵
  - Writes file to system bin folder
  - Reads runtime system information
  PID:1600

/bin/sh
sh -c "chmod 0755 /bin/ss"
1⤵
PID:1601
- /bin/chmod
  chmod 0755 /bin/ss
  2⤵
  PID:1602

/bin/sh
sh -c "cp -f /usr/bin/lsof /usr/bin/dpkgd/lsof"
1⤵
PID:1603
- /bin/cp
  cp -f /usr/bin/lsof /usr/bin/dpkgd/lsof
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1604

/bin/sh
sh -c "mkdir -p /usr/bin"
1⤵
PID:1605
- /bin/mkdir
  mkdir -p /usr/bin
  2⤵
  - Reads runtime system information
  PID:1606

/bin/sh
sh -c "mkdir -p /usr/bin"
1⤵
PID:1607
- /bin/mkdir
  mkdir -p /usr/bin
  2⤵
  - Reads runtime system information
  PID:1608

/bin/sh
sh -c "cp -f /usr/bin/bsd-port/getty /usr/bin/lsof"
1⤵
PID:1609
- /bin/cp
  cp -f /usr/bin/bsd-port/getty /usr/bin/lsof
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1610

/bin/sh
sh -c "chmod 0755 /usr/bin/lsof"
1⤵
PID:1611
- /bin/chmod
  chmod 0755 /usr/bin/lsof
  2⤵
  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:1617
- /sbin/insmod
  insmod /tmp/xpacket.ko
  2⤵
  - Reads runtime system information
  PID:1618

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
6995ceb6fb59efe8987d69361d4d3682

SHA1
f066ce87188dcd06277c57beecce905d83047ae3

SHA256
a92a690f20b429537f8aae0323990ee077a64295518e69f668a6cf80751dcad7

SHA512
cb87f8c24b37eee12b525ab95d9aecfdcab2fe82eea38f4f4ed6ca546ebafa601e8de73b2a7ce361730475acb17b7ce87fe8941238847e67defe65121344893b

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/etc/init.d/selinux

Filesize
36B

MD5
993cc15058142d96c3daf7852c3d5ee8

SHA1
0950b8b391b04dd3895ea33cd3141543ebd2525d

SHA256
8171d077918611803d93088409f220c66fae1c670b297e1aa5d8cbd548ce9208

SHA512
0c4256c00a3710f97e92581b552682b36b62afc35fe72622c491323c618c19ea62611ac04ccafc3dfcde2254a2ebbd93b69b66795b16e36332293bed83adb928

Download Submit
/tmp/gates.lod

Filesize
4B

MD5
b60c5ab647a27045b462934977ccad9a

SHA1
aff60c26ab00f0ad980af68c68a926fa11795ef9

SHA256
0f8e631d28e2a339b435ea55da61c718da28902056ed719e576ff1c1b4cb2baf

SHA512
d8e0a85d197bbd49b2c4586c3e6e29dcdfa203b80c4d3480a4f48f0aeefd87ce3261e56bae531551d6eb007afd221a16df4447d1d4882c846a144754d16b8431

Download Submit
/tmp/moni.lod

Filesize
4B

MD5
69d658d0b2859e32cd4dc3b970c8496c

SHA1
2a7bcf3804dc71895222bdd5f95e64444ce51654

SHA256
96382608813353bee4eeaf0635a3b3356276fece94fe8c9cf048871078f8fd14

SHA512
1222e306ef8fe358e297a275b61a3bb9aca3ec2b38ed1056fd2816b7bba7b32104218680531d8f8f12cea6e4e726c06daea88cf427163bd3365d0675350a428c

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/tmp/notify.file

Filesize
37B

MD5
4c2fef505cf8eaff107a6024a009992f

SHA1
33a4b3967bea4a318869b962ff274ed1c5d1d7d8

SHA256
f46a1444b78607c7a2a033d379eadbfddc2d8020676854a558c64ae67df6c49e

SHA512
2ecdbbd5656c87739b89439ec28f096cb6216d629477273cbeac659caf6c7ff247a68877d1ba8376816a553e21755793d30b0c27621d13ae660081b791980c01

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

Filesize
73B

MD5
0373dde964cc15e972811dcde17c242d

SHA1
7784f0fa000bab8fd8098c5e0381595e0bedf2ea

SHA256
df9709472b2b09256e4f49d3b40716ad1865b7ad05088c05b362be663fc8a80c

SHA512
44851ed5a3eb985919f31517293c5f158b45084b10bf99dc0ae18905b6c1e2789559377ce89a1220edbc4c21bc51b31d8a99e3556cf20394d300188a41c92322

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/usr/bin/bsd-port/getty

Filesize
1.2MB

MD5
c8a06a490fc859f2f3d5876ffb93a01a

SHA1
e209828fe9ae7f0ac8011db43f1b62e079f10c6b

SHA256
85b18a45a5f12da6da29c734f8120baf0278ea742545861bda7cc8cff161ef85

SHA512
a47b74dee1e047fa9f74b90e806a2d412f43aa8542e6c52da84211fca7f87424f0ef4700cebf45205bbbc0ac3df4edf40b0fa50c9819c79c8561683e99f6143f

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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