mrblack | 9fbcea7ba6259f843ac2cbee1ea2579e199d8fcf614d41fc1c9358d906c21094

Analysis

max time kernel
153s
max time network
131s
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 14:29

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General

Target

c35ac2353cc09213e331997c75bcd8aa
Size

1.2MB
MD5

c35ac2353cc09213e331997c75bcd8aa
SHA1

2af9f46f665b7ee45d716fda2ba92c76168804b4
SHA256

9fbcea7ba6259f843ac2cbee1ea2579e199d8fcf614d41fc1c9358d906c21094
SHA512

ac02e169955d4840c3cccb63381625151d8fbafffd865e46437400090aae04b8d753abb9f2068404b9621b2a3f2fb4d0450a69efab410b2a0cd93779052197c8
SSDEEP

24576:e845rGHu6gVJKG75oFpA0VWIX4n2y1q2rJp0:745vRVJKGtSA0VWIo2u9p0

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	1554	getty
/usr/bin/.sshd	1606	.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/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
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 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/filesystems	mkdir
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/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	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	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

Writes file to tmp directory 4 IoCs

Malware often drops required files in the /tmp directory.

description	ioc
File opened for modification	/tmp/notify.file
File opened for modification	/tmp/moni.lod
File opened for modification	/tmp/bill.lock
File opened for modification	/tmp/gates.lod

/tmp/c35ac2353cc09213e331997c75bcd8aa
/tmp/c35ac2353cc09213e331997c75bcd8aa
1⤵
PID:1528

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc1.d/S97DbSecuritySpt"
1⤵
PID:1536
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc1.d/S97DbSecuritySpt
  2⤵
  PID:1537

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc2.d/S97DbSecuritySpt"
1⤵
PID:1538
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc2.d/S97DbSecuritySpt
  2⤵
  PID:1539

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc3.d/S97DbSecuritySpt"
1⤵
PID:1540
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc3.d/S97DbSecuritySpt
  2⤵
  PID:1541

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc4.d/S97DbSecuritySpt"
1⤵
PID:1542
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc4.d/S97DbSecuritySpt
  2⤵
  PID:1543

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc5.d/S97DbSecuritySpt"
1⤵
PID:1544
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc5.d/S97DbSecuritySpt
  2⤵
  PID:1545

/bin/sh
sh -c "mkdir -p /usr/bin/bsd-port"
1⤵
PID:1546
- /bin/mkdir
  mkdir -p /usr/bin/bsd-port
  2⤵
  - Reads runtime system information
  PID:1547

/bin/sh
sh -c "mkdir -p /usr/bin/bsd-port"
1⤵
PID:1548
- /bin/mkdir
  mkdir -p /usr/bin/bsd-port
  2⤵
  - Reads runtime system information
  PID:1549

/bin/sh
sh -c "cp -f /tmp/c35ac2353cc09213e331997c75bcd8aa /usr/bin/bsd-port/getty"
1⤵
PID:1550
- /bin/cp
  cp -f /tmp/c35ac2353cc09213e331997c75bcd8aa /usr/bin/bsd-port/getty
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1551

/bin/sh
sh -c /usr/bin/bsd-port/getty
1⤵
PID:1553
- /usr/bin/bsd-port/getty
  /usr/bin/bsd-port/getty
  2⤵
  - Executes dropped EXE
  PID:1554

/bin/sh
sh -c "mkdir -p /usr/bin"
1⤵
PID:1556
- /bin/mkdir
  mkdir -p /usr/bin
  2⤵
  - Reads runtime system information
  PID:1557

/bin/sh
sh -c "mkdir -p /usr/bin"
1⤵
PID:1558
- /bin/mkdir
  mkdir -p /usr/bin
  2⤵
  - Reads runtime system information
  PID:1559

/bin/sh
sh -c "cp -f /tmp/c35ac2353cc09213e331997c75bcd8aa /usr/bin/.sshd"
1⤵
PID:1560
- /bin/cp
  cp -f /tmp/c35ac2353cc09213e331997c75bcd8aa /usr/bin/.sshd
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1561

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc1.d/S99selinux"
1⤵
PID:1562
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc1.d/S99selinux
  2⤵
  PID:1563

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc2.d/S99selinux"
1⤵
PID:1564
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc2.d/S99selinux
  2⤵
  PID:1565

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc3.d/S99selinux"
1⤵
PID:1566
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc3.d/S99selinux
  2⤵
  PID:1567

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc4.d/S99selinux"
1⤵
PID:1568
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc4.d/S99selinux
  2⤵
  PID:1569

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc5.d/S99selinux"
1⤵
PID:1570
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc5.d/S99selinux
  2⤵
  PID:1571

/bin/sh
sh -c "mkdir -p /usr/bin/dpkgd"
1⤵
PID:1572
- /bin/mkdir
  mkdir -p /usr/bin/dpkgd
  2⤵
  - Reads runtime system information
  PID:1573

/bin/sh
sh -c "cp -f /bin/ps /usr/bin/dpkgd/ps"
1⤵
PID:1574
- /bin/cp
  cp -f /bin/ps /usr/bin/dpkgd/ps
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1575

/bin/sh
sh -c "mkdir -p /bin"
1⤵
PID:1576
- /bin/mkdir
  mkdir -p /bin
  2⤵
  - Reads runtime system information
  PID:1577

/bin/sh
sh -c "mkdir -p /bin"
1⤵
PID:1578
- /bin/mkdir
  mkdir -p /bin
  2⤵
  - Reads runtime system information
  PID:1579

/bin/sh
sh -c "cp -f /usr/bin/bsd-port/getty /bin/ps"
1⤵
PID:1580
- /bin/cp
  cp -f /usr/bin/bsd-port/getty /bin/ps
  2⤵
  - Writes file to system bin folder
  - Reads runtime system information
  PID:1581

/bin/sh
sh -c "chmod 0755 /bin/ps"
1⤵
PID:1582
- /bin/chmod
  chmod 0755 /bin/ps
  2⤵
  PID:1583

/bin/sh
sh -c "cp -f /bin/ss /usr/bin/dpkgd/ss"
1⤵
PID:1584
- /bin/cp
  cp -f /bin/ss /usr/bin/dpkgd/ss
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1585

/bin/sh
sh -c "mkdir -p /bin"
1⤵
PID:1586
- /bin/mkdir
  mkdir -p /bin
  2⤵
  - Reads runtime system information
  PID:1587

/bin/sh
sh -c "mkdir -p /bin"
1⤵
PID:1588
- /bin/mkdir
  mkdir -p /bin
  2⤵
  - Reads runtime system information
  PID:1589

/bin/sh
sh -c "cp -f /usr/bin/bsd-port/getty /bin/ss"
1⤵
PID:1590
- /bin/cp
  cp -f /usr/bin/bsd-port/getty /bin/ss
  2⤵
  - Writes file to system bin folder
  - Reads runtime system information
  PID:1591

/bin/sh
sh -c "chmod 0755 /bin/ss"
1⤵
PID:1592
- /bin/chmod
  chmod 0755 /bin/ss
  2⤵
  PID:1593

/bin/sh
sh -c "cp -f /usr/bin/lsof /usr/bin/dpkgd/lsof"
1⤵
PID:1594
- /bin/cp
  cp -f /usr/bin/lsof /usr/bin/dpkgd/lsof
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1595

/bin/sh
sh -c "mkdir -p /usr/bin"
1⤵
PID:1596
- /bin/mkdir
  mkdir -p /usr/bin
  2⤵
  - Reads runtime system information
  PID:1597

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

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

/bin/sh
sh -c "chmod 0755 /usr/bin/lsof"
1⤵
PID:1602
- /bin/chmod
  chmod 0755 /usr/bin/lsof
  2⤵
  PID:1603

/bin/sh
sh -c /usr/bin/.sshd
1⤵
PID:1605
- /usr/bin/.sshd
  /usr/bin/.sshd
  2⤵
  - Executes dropped EXE
  PID:1606

/bin/sh
sh -c "insmod /usr/bin/bsd-port/xpacket.ko"
1⤵
PID:1609
- /sbin/insmod
  insmod /usr/bin/bsd-port/xpacket.ko
  2⤵
  - Reads runtime system information
  PID:1610

/bin/sh
sh -c "insmod /tmp/xpacket.ko"
1⤵
PID:1611
- /sbin/insmod
  insmod /tmp/xpacket.ko
  2⤵
  - Reads runtime system information
  PID:1613

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
d40640df3bafff0a2c51d231fe799102

SHA1
868b42a775c485dc7f790dcc12b03988f33253c4

SHA256
f77f1ba62967f18c32910c4148157787a989ab658e09ab874e05559d26c94ceb

SHA512
2e179ee1a4f054f79d86adcedcd1ee1dc8d644fdb5960278ee934c128accc0838ab05a24511bec7750f3e2c2191fcbc083dc40106407d470ae8b088199ffb65b

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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
aa486f25175cbdc3854151288a645c19

SHA1
375f9609c9962cce0ad6ccaaabd80362ecd2b07f

SHA256
6f52d3110a0e41e462ac098244206ed69db33999b743e284fc4c5d34c2d4a529

SHA512
748485a77c98dd710b359ed1345da8a5fc8b57b53261e136a5f9829d3ee7805bef1deee6e272fe342e0763639ff04ddc9482527b6c8a0b9ea998c6324d3ef3d7

Download Submit
/tmp/moni.lod

Filesize
4B

MD5
9597353e41e6957b5e7aa79214fcb256

SHA1
90f919999619a047d963085525bda5642495fbcd

SHA256
35fae39286f862cb505a3f0cac0b0d506f9a407cf9227d3c2ae2c67d5ec0d0f5

SHA512
9fcb7831bbcf3b6dd8881d8c8e694a2fc80fbe1fc05cb4549d3b95e290875dbe269b2cc481a0c37ab3e24b976eac18dfb9e33a9c60845389b7c7ab5c18698ed1

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/tmp/notify.file

Filesize
37B

MD5
9228ba8d7c1c1ac850098ef432d8ba26

SHA1
50c9ec6d73ee4cbc73c3f55b2b907227a4da57c9

SHA256
7dc4715d7618190658973ddb5be3f6aed8a8a71303d04dcda4d44ecccfe91f35

SHA512
34c19905053f7d51db20ad50cbf0db57ffa5a43c70c68048c4496f8432162e475abdcb075e708ca77bd6f2088642c74f3c24e16f6f0b4449a741b7070db4d269

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/usr/bin/bsd-port/getty

Filesize
1.2MB

MD5
c35ac2353cc09213e331997c75bcd8aa

SHA1
2af9f46f665b7ee45d716fda2ba92c76168804b4

SHA256
9fbcea7ba6259f843ac2cbee1ea2579e199d8fcf614d41fc1c9358d906c21094

SHA512
ac02e169955d4840c3cccb63381625151d8fbafffd865e46437400090aae04b8d753abb9f2068404b9621b2a3f2fb4d0450a69efab410b2a0cd93779052197c8

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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