mrblack | e4883dda7079c57d623a0b7b7bd2ede4c796f1e00fe5cf039daedd25dd26c957

General

Target

7f25db5cb1cc08f7eb7c0f5fa46268ef
Size

1.1MB
MD5

7f25db5cb1cc08f7eb7c0f5fa46268ef
SHA1

c1325e3dc4881fa1c09c7f497e60b7fd0f663ba0
SHA256

e4883dda7079c57d623a0b7b7bd2ede4c796f1e00fe5cf039daedd25dd26c957
SHA512

961f221083d4f88a55a7d2424849302e18cc2e5b91f63bf776fe2beb3111569903fde685e0ec9802c83e414208fdb6af7c497fb11ff9823108ce9eca0bc1fa1b
SSDEEP

24576:4vRE7caCfKGPqVEDNLFxKsfaAI+gIGYuuCol7r:4vREKfPqVE5jKsfaARHGVo7r

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	1549	getty
/usr/bin/.sshd	1597	.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 7 IoCs

Hijack Execution Flow

T1574

description	ioc	Process
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/lsof	cp
File opened for modification	/usr/bin/lsof	cp

Writes file to system bin folder 1 TTPs 1 IoCs

Hijack Execution Flow

T1574

description	ioc	Process
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 15 IoCs

Reads data from /proc virtual filesystem.

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

/tmp/7f25db5cb1cc08f7eb7c0f5fa46268ef
/tmp/7f25db5cb1cc08f7eb7c0f5fa46268ef
1⤵
PID:1527

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc1.d/S97DbSecuritySpt"
1⤵
PID:1533
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc1.d/S97DbSecuritySpt
  2⤵
  PID:1534

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc2.d/S97DbSecuritySpt"
1⤵
PID:1535
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc2.d/S97DbSecuritySpt
  2⤵
  PID:1536

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc3.d/S97DbSecuritySpt"
1⤵
PID:1537
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc3.d/S97DbSecuritySpt
  2⤵
  PID:1538

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc4.d/S97DbSecuritySpt"
1⤵
PID:1539
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc4.d/S97DbSecuritySpt
  2⤵
  PID:1540

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc5.d/S97DbSecuritySpt"
1⤵
PID:1541
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc5.d/S97DbSecuritySpt
  2⤵
  PID:1542

/bin/sh
sh -c "mkdir -p /usr/bin/bsd-port"
1⤵
PID:1543
- /bin/mkdir
  mkdir -p /usr/bin/bsd-port
  2⤵
  - Reads runtime system information
  PID:1544

/bin/sh
sh -c "cp -f /tmp/7f25db5cb1cc08f7eb7c0f5fa46268ef /usr/bin/bsd-port/getty"
1⤵
PID:1545
- /bin/cp
  cp -f /tmp/7f25db5cb1cc08f7eb7c0f5fa46268ef /usr/bin/bsd-port/getty
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1546

/bin/sh
sh -c /usr/bin/bsd-port/getty
1⤵
PID:1548
- /usr/bin/bsd-port/getty
  /usr/bin/bsd-port/getty
  2⤵
  - Executes dropped EXE
  PID:1549

/bin/sh
sh -c "mkdir -p /usr/bin"
1⤵
PID:1551
- /bin/mkdir
  mkdir -p /usr/bin
  2⤵
  - Reads runtime system information
  PID:1552

/bin/sh
sh -c "cp -f /tmp/7f25db5cb1cc08f7eb7c0f5fa46268ef /usr/bin/.sshd"
1⤵
PID:1553
- /bin/cp
  cp -f /tmp/7f25db5cb1cc08f7eb7c0f5fa46268ef /usr/bin/.sshd
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1554

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc1.d/S99selinux"
1⤵
PID:1555
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc1.d/S99selinux
  2⤵
  PID:1556

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc2.d/S99selinux"
1⤵
PID:1557
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc2.d/S99selinux
  2⤵
  PID:1558

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc3.d/S99selinux"
1⤵
PID:1559
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc3.d/S99selinux
  2⤵
  PID:1560

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc4.d/S99selinux"
1⤵
PID:1561
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc4.d/S99selinux
  2⤵
  PID:1562

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc5.d/S99selinux"
1⤵
PID:1563
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc5.d/S99selinux
  2⤵
  PID:1564

/bin/sh
sh -c "mkdir -p /usr/bin/dpkgd"
1⤵
PID:1565
- /bin/mkdir
  mkdir -p /usr/bin/dpkgd
  2⤵
  - Reads runtime system information
  PID:1566

/bin/sh
sh -c "cp -f /bin/ps /usr/bin/dpkgd/ps"
1⤵
PID:1567
- /bin/cp
  cp -f /bin/ps /usr/bin/dpkgd/ps
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1568

/bin/sh
sh -c "mkdir -p /bin"
1⤵
PID:1569
- /bin/mkdir
  mkdir -p /bin
  2⤵
  - Reads runtime system information
  PID:1570

/bin/sh
sh -c "cp -f /usr/bin/bsd-port/getty /bin/ps"
1⤵
PID:1571
- /bin/cp
  cp -f /usr/bin/bsd-port/getty /bin/ps
  2⤵
  - Writes file to system bin folder
  - Reads runtime system information
  PID:1572

/bin/sh
sh -c "chmod 0755 /bin/ps"
1⤵
PID:1573
- /bin/chmod
  chmod 0755 /bin/ps
  2⤵
  PID:1574

/bin/sh
sh -c "cp -f /usr/bin/lsof /usr/bin/dpkgd/lsof"
1⤵
PID:1575
- /bin/cp
  cp -f /usr/bin/lsof /usr/bin/dpkgd/lsof
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1576

/bin/sh
sh -c "mkdir -p /usr/bin"
1⤵
PID:1577
- /bin/mkdir
  mkdir -p /usr/bin
  2⤵
  - Reads runtime system information
  PID:1578

/bin/sh
sh -c "cp -f /usr/bin/bsd-port/getty /usr/bin/lsof"
1⤵
PID:1579
- /bin/cp
  cp -f /usr/bin/bsd-port/getty /usr/bin/lsof
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1580

/bin/sh
sh -c "chmod 0755 /usr/bin/lsof"
1⤵
PID:1581
- /bin/chmod
  chmod 0755 /usr/bin/lsof
  2⤵
  PID:1582

/bin/sh
sh -c "insmod /usr/lib/xpacket.ko"
1⤵
PID:1583
- /sbin/insmod
  insmod /usr/lib/xpacket.ko
  2⤵
  - Reads runtime system information
  PID:1584

/bin/sh
sh -c /usr/bin/.sshd
1⤵
PID:1596
- /usr/bin/.sshd
  /usr/bin/.sshd
  2⤵
  - Executes dropped EXE
  PID:1597

/bin/sh
sh -c "insmod /usr/lib/xpacket.ko"
1⤵
PID:1599
- /sbin/insmod
  insmod /usr/lib/xpacket.ko
  2⤵
  - Reads runtime system information
  PID:1600

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Hijack Execution Flow

2

T1574

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Hijack Execution Flow

2

T1574

Defense Evasion

Hijack Execution Flow

2

T1574

Virtualization/Sandbox Evasion

1

T1497

Credential Access

Discovery

System Network Configuration Discovery

1

T1016

Virtualization/Sandbox Evasion

1

T1497

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

/etc/init.d/DbSecuritySpt

Filesize
50B

MD5
6568ff09041b5c1e5240b615ef10b9da

SHA1
8bef0ce6716181516618e951eb8cd1de35735277

SHA256
1a6ecbd34e5b6120b16db6f109570a83692474e256e38fd3dcac46da9f8b0e70

SHA512
40a9c07975145060b8529ed213004f3aa6f4ca0aebe673da7c57eed07e5431af19d7c12156fc965580e73adb2188954573c65ad07c924ac47b1d5726325d1212

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/etc/init.d/selinux

Filesize
36B

MD5
993cc15058142d96c3daf7852c3d5ee8

SHA1
0950b8b391b04dd3895ea33cd3141543ebd2525d

SHA256
8171d077918611803d93088409f220c66fae1c670b297e1aa5d8cbd548ce9208

SHA512
0c4256c00a3710f97e92581b552682b36b62afc35fe72622c491323c618c19ea62611ac04ccafc3dfcde2254a2ebbd93b69b66795b16e36332293bed83adb928

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/tmp/gates.lock

Filesize
4B

MD5
109d2dd3608f669ca17920c511c2a41e

SHA1
f73ea162f0ed315f3d7f8e2c79a2a4144091a128

SHA256
7e46d737fdcad87443ca5b30dd756a5eb6b6dfa94eb0c97ce8c8c16554bc4efb

SHA512
f413ec0c42aa8762a1e4aba709dfc25f114308cd795b4f324df00a77afcc42eae9d765642e11285fc75b4c9528595080a5cad76be02e4d4cae8bc3832dd51c9d

Download Submit
/tmp/moni.lock

Filesize
4B

MD5
9c19a2aa1d84e04b0bd4bc888792bd1e

SHA1
037880d210451b590c3a5229ea350645724e7e15

SHA256
191024c47d6c2b3c24a570326b7e29f09652ec8bc2bb1779d95783e8753d12db

SHA512
fbc7830e289b19696b7b6e01ae6d7e5403d144d417e380e47c29ea17db59c765ae7aa4a47cf885b6af0df831a8c98d5f99a40c35d121854ba273dd4afab24f93

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/tmp/notify.file

Filesize
37B

MD5
d31ed53790863b21aefbbbc0832e1936

SHA1
ae6cb2eda3a5d61c3e50e09ad03835f003f52ecd

SHA256
99178664b02e3adf8c0b58f0d9041b5a550634e0c1c15fd259a55784c43c0e6e

SHA512
5bf633771c2620b16e22f43523f8da64319a57aa4b315d24942d78c64b6b8c59a4a233e33930eae2d1107023ea13cc5040ba55e8760e7f1d9f3e7f12177ea391

Download Submit
/usr/bin/bsd-port/getty

Filesize
1.1MB

MD5
7f25db5cb1cc08f7eb7c0f5fa46268ef

SHA1
c1325e3dc4881fa1c09c7f497e60b7fd0f663ba0

SHA256
e4883dda7079c57d623a0b7b7bd2ede4c796f1e00fe5cf039daedd25dd26c957

SHA512
961f221083d4f88a55a7d2424849302e18cc2e5b91f63bf776fe2beb3111569903fde685e0ec9802c83e414208fdb6af7c497fb11ff9823108ce9eca0bc1fa1b

Download Submit
/usr/bin/dpkgd/lsof

Filesize
159KB

MD5
e093dc78225e2a0a25e3b137c1c1e442

SHA1
c29497cfaae729eb576875e4fdfa400640ab16be

SHA256
1190f4dbc7be174de8fd4096c9bf7a28eebfac937d308b7cc533be4a1240d26e

SHA512
fe1cc7a65327732eaaee89f427c10239ba822430e34177842f4681068d78d404b1830d808a2a71b1efcc5f126c6d8c053512237421173aaa150e215a672da6f0

Download Submit
/usr/bin/dpkgd/ps

Filesize
130KB

MD5
558edc26f8a38fa9788220b9af8a73e7

SHA1
3024d44e580e9c67f32f6c585d50e2a6cc9a7cac

SHA256
b76435c80333d2c1fd18e0e7682f1c9dfb5da8d507e93e3c416f54b481c428d5

SHA512
edaa425b441044f015e8f68fffa1664e42372d00dd0e7b0924d24ce947aa8e5f96b3bdc326fa2f8b978e3fcf638a1ceca45a223735db73f1607df66990feb56f

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads