mrblack | 7d4529ae3fde5d8d91f90478708350497c859f9db88ce401c8eb40c9d1bd57a6

Analysis

max time kernel
153s
max time network
152s
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 17:06

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General

Target

fb32d9ed9ec428e273d020411369c13a
Size

1.1MB
MD5

fb32d9ed9ec428e273d020411369c13a
SHA1

cfee07acf58b774744494ef911bd0e0949e57bfc
SHA256

7d4529ae3fde5d8d91f90478708350497c859f9db88ce401c8eb40c9d1bd57a6
SHA512

59ece367cf98b1577b412f40055a988f8c3281c8e6072ed45743760dac487ccdf83b2f947d1f70032ac173014896b56bc98038945f02b6751ac28aa534a8943f
SSDEEP

24576:lzdjjEQBCRwTvlSg+Z0cDCFXtuTPE/dl0rUmQLNwy0R:lZjEEFLEg+Z0wutuTPE1l0rU5d0R

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	1582	getty
/usr/bin/.sshd	1590	.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/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/conf.n	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/bsd-port/getty.lock	Process not Found
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 18 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/filesystems	mkdir
File opened for reading	/proc/filesystems	cp
File opened for reading	/proc/cmdline	insmod
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/stat	Process not Found
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/meminfo	Process not Found
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/fb32d9ed9ec428e273d020411369c13a
/tmp/fb32d9ed9ec428e273d020411369c13a
1⤵
PID:1551

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc1.d/S97DbSecuritySpt"
1⤵
PID:1566
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc1.d/S97DbSecuritySpt
  2⤵
  PID:1567

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc2.d/S97DbSecuritySpt"
1⤵
PID:1568
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc2.d/S97DbSecuritySpt
  2⤵
  PID:1569

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc3.d/S97DbSecuritySpt"
1⤵
PID:1570
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc3.d/S97DbSecuritySpt
  2⤵
  PID:1571

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc4.d/S97DbSecuritySpt"
1⤵
PID:1572
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc4.d/S97DbSecuritySpt
  2⤵
  PID:1573

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc5.d/S97DbSecuritySpt"
1⤵
PID:1574
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc5.d/S97DbSecuritySpt
  2⤵
  PID:1575

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

/bin/sh
sh -c "cp -f /tmp/fb32d9ed9ec428e273d020411369c13a /usr/bin/bsd-port/getty"
1⤵
PID:1578
- /bin/cp
  cp -f /tmp/fb32d9ed9ec428e273d020411369c13a /usr/bin/bsd-port/getty
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1579

/bin/sh
sh -c /usr/bin/bsd-port/getty
1⤵
PID:1581
- /usr/bin/bsd-port/getty
  /usr/bin/bsd-port/getty
  2⤵
  - Executes dropped EXE
  PID:1582

/bin/sh
sh -c "mkdir -p /usr/bin"
1⤵
PID:1584
- /bin/mkdir
  mkdir -p /usr/bin
  2⤵
  - Reads runtime system information
  PID:1585

/bin/sh
sh -c "cp -f /tmp/fb32d9ed9ec428e273d020411369c13a /usr/bin/.sshd"
1⤵
PID:1586
- /bin/cp
  cp -f /tmp/fb32d9ed9ec428e273d020411369c13a /usr/bin/.sshd
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1587

/bin/sh
sh -c /usr/bin/.sshd
1⤵
PID:1589
- /usr/bin/.sshd
  /usr/bin/.sshd
  2⤵
  - Executes dropped EXE
  PID:1590

/bin/sh
sh -c "insmod /usr/lib/xpacket.ko"
1⤵
PID:1592
- /sbin/insmod
  insmod /usr/lib/xpacket.ko
  2⤵
  - Reads runtime system information
  PID:1593

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc1.d/S99selinux"
1⤵
PID:1600
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc1.d/S99selinux
  2⤵
  PID:1601

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc2.d/S99selinux"
1⤵
PID:1603
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc2.d/S99selinux
  2⤵
  PID:1605

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc3.d/S99selinux"
1⤵
PID:1606
- /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 "mkdir -p /bin"
1⤵
PID:1617
- /bin/mkdir
  mkdir -p /bin
  2⤵
  - Reads runtime system information
  PID:1618

/bin/sh
sh -c "cp -f /usr/bin/bsd-port/getty /bin/ps"
1⤵
PID:1619
- /bin/cp
  cp -f /usr/bin/bsd-port/getty /bin/ps
  2⤵
  - Writes file to system bin folder
  - Reads runtime system information
  PID:1620

/bin/sh
sh -c "chmod 0755 /bin/ps"
1⤵
PID:1621
- /bin/chmod
  chmod 0755 /bin/ps
  2⤵
  PID:1622

/bin/sh
sh -c "cp -f /bin/ss /usr/bin/dpkgd/ss"
1⤵
PID:1623
- /bin/cp
  cp -f /bin/ss /usr/bin/dpkgd/ss
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1624

/bin/sh
sh -c "mkdir -p /bin"
1⤵
PID:1625
- /bin/mkdir
  mkdir -p /bin
  2⤵
  - Reads runtime system information
  PID:1626

/bin/sh
sh -c "cp -f /usr/bin/bsd-port/getty /bin/ss"
1⤵
PID:1627
- /bin/cp
  cp -f /usr/bin/bsd-port/getty /bin/ss
  2⤵
  - Writes file to system bin folder
  - Reads runtime system information
  PID:1628

/bin/sh
sh -c "chmod 0755 /bin/ss"
1⤵
PID:1629
- /bin/chmod
  chmod 0755 /bin/ss
  2⤵
  PID:1630

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

/bin/sh
sh -c "mkdir -p /usr/bin"
1⤵
PID:1634
- /bin/mkdir
  mkdir -p /usr/bin
  2⤵
  - Reads runtime system information
  PID:1635

/bin/sh
sh -c "cp -f /usr/bin/bsd-port/getty /usr/bin/lsof"
1⤵
PID:1636
- /bin/cp
  cp -f /usr/bin/bsd-port/getty /usr/bin/lsof
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1637

/bin/sh
sh -c "chmod 0755 /usr/bin/lsof"
1⤵
PID:1638
- /bin/chmod
  chmod 0755 /usr/bin/lsof
  2⤵
  PID:1639

/bin/sh
sh -c "insmod /usr/lib/xpacket.ko"
1⤵
PID:1640
- /sbin/insmod
  insmod /usr/lib/xpacket.ko
  2⤵
  - Reads runtime system information
  PID:1641

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
467ee44bc34f15d9cce15de5f31a72a3

SHA1
0379b8cda3b6799443982d06404352f85847019a

SHA256
a79aed2141ddab5444af39ff52b09ccd748680d61bab6594b8afe73beefbc1e4

SHA512
4bc1b4dd1d688851dbe6ca4042c72a9b69984d82dfdc7e2ae4365bb1ef801a5026deb1d15eda216f077bf4b5ac7722f4d0caab30d296d37351287937c152332c

Download Submit
/etc/init.d/selinux

Filesize
36B

MD5
993cc15058142d96c3daf7852c3d5ee8

SHA1
0950b8b391b04dd3895ea33cd3141543ebd2525d

SHA256
8171d077918611803d93088409f220c66fae1c670b297e1aa5d8cbd548ce9208

SHA512
0c4256c00a3710f97e92581b552682b36b62afc35fe72622c491323c618c19ea62611ac04ccafc3dfcde2254a2ebbd93b69b66795b16e36332293bed83adb928

Download Submit
/tmp/gates.lod

Filesize
4B

MD5
351b33587c5fdd93bd42ef7ac9995a28

SHA1
440f13f2ffe7800ae87431f50edb70aa51e49fde

SHA256
51e6811411165c04f691eb5a38cf11a7316fdd776478b4fd222fd0107973c381

SHA512
d4c03bb876b38c94d99a022f56ae99cfa0b0aebe95723c0851d5d989ef2eb6924962d0d332abcae2b9cba6fc86a0d57c11a13d2ae94df169718ba45f2ef90565

Download Submit
/tmp/moni.lod

Filesize
4B

MD5
5129a5ddcd0dcd755232baa04c231698

SHA1
b2a3625de074749ed626d2c2fdf5342d7757a850

SHA256
e52522a505f68250e81747aa5386c5c60196c1680f1c89762ab1ab0fbaae39b8

SHA512
27f36a56ba7f81569a7edcada4b457648cef41168a85cadf11c6e649295b110569e060047c624376a3dd8372edf153ae15c954cce7e308e8f826884a707d12c9

Download Submit
/tmp/notify.file

Filesize
37B

MD5
c1aecebd289ed8fb6d2269ce72f9e0cb

SHA1
f5b7e456b58221112dc7517805f817eccfafd358

SHA256
9dbf883c78f1019168589b832b43a9d0789bdb49ba8220e624eac11582c53df1

SHA512
c1f9be78e880f126c31aa81a38a2a107d69f3f730c2de52909ae21499b56b9e6c2f9394700ba3f06ab9164a3ba9bd249e0ade7e7460b76a4e9e5d538b9c16446

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

Filesize
69B

MD5
709576b0953dc08211f82fb5f0a3a097

SHA1
762ffe4640952ddb127c878143bbe1005e11de68

SHA256
c5430b75c6a44e5035cea9ef1f356769829a25a199af51f8f3234b3de03503cc

SHA512
306889217a1463fd45d3e679d8ce95f1a19672266739c0cc5a8051258438bfd7c86b697fe12fd77ac52f0214dd8e27bb9ad15e8bdda1f83c3390213e89295b58

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

Filesize
1.1MB

MD5
fb32d9ed9ec428e273d020411369c13a

SHA1
cfee07acf58b774744494ef911bd0e0949e57bfc

SHA256
7d4529ae3fde5d8d91f90478708350497c859f9db88ce401c8eb40c9d1bd57a6

SHA512
59ece367cf98b1577b412f40055a988f8c3281c8e6072ed45743760dac487ccdf83b2f947d1f70032ac173014896b56bc98038945f02b6751ac28aa534a8943f

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

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