mrblack | e2eab5338aa0006916a92e4f9e741adab84d977659d49bf03e6a3bd4b6660a30

Analysis

max time kernel
153s
max time network
157s
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 13:11

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General

Target

9b40b639cec4ddfe9ff15820367ca67d
Size

1.5MB
MD5

9b40b639cec4ddfe9ff15820367ca67d
SHA1

40b22c42d9c10369ec814bf411153c9613fe5a63
SHA256

e2eab5338aa0006916a92e4f9e741adab84d977659d49bf03e6a3bd4b6660a30
SHA512

7a2d95c2321b4dc3a72e4d8876ce8e0f2d8602977c53bac6b1db4985ece6dcc6ce33d93f19ec87a1ea20cbaa4888e6d7b98ef510490eb5b0692394ef07d6b927
SSDEEP

49152:2nilOolLbt1laIunbZsehkxS55555555555555555555555555555555555k55w1:yeOolLbt1laIunlsehNNtYi7COEm

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	1563	getty
/usr/bin/.sshd	1625	.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/getty.lock	Process not Found
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/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/bsd-port/conf.n	Process not Found

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/route
File opened for reading	/proc/net/arp
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	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/filesystems	mkdir
File opened for reading	/proc/stat	Process not Found
File opened for reading	/proc/cmdline	insmod
File opened for reading	/proc/filesystems	cp
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	mkdir
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
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

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/9b40b639cec4ddfe9ff15820367ca67d
/tmp/9b40b639cec4ddfe9ff15820367ca67d
1⤵
PID:1536

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc1.d/S97DbSecuritySpt"
1⤵
PID:1544
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc1.d/S97DbSecuritySpt
  2⤵
  PID:1545

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc2.d/S97DbSecuritySpt"
1⤵
PID:1546
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc2.d/S97DbSecuritySpt
  2⤵
  PID:1547

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc3.d/S97DbSecuritySpt"
1⤵
PID:1548
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc3.d/S97DbSecuritySpt
  2⤵
  PID:1549

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc4.d/S97DbSecuritySpt"
1⤵
PID:1550
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc4.d/S97DbSecuritySpt
  2⤵
  PID:1551

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc5.d/S97DbSecuritySpt"
1⤵
PID:1552
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc5.d/S97DbSecuritySpt
  2⤵
  PID:1553

/bin/sh
sh -c "mkdir -p /usr/bin/bsd-port"
1⤵
PID:1555
- /bin/mkdir
  mkdir -p /usr/bin/bsd-port
  2⤵
  - Reads runtime system information
  PID:1556

/bin/sh
sh -c "mkdir -p /usr/bin/bsd-port"
1⤵
PID:1557
- /bin/mkdir
  mkdir -p /usr/bin/bsd-port
  2⤵
  - Reads runtime system information
  PID:1558

/bin/sh
sh -c "cp -f /tmp/9b40b639cec4ddfe9ff15820367ca67d /usr/bin/bsd-port/getty"
1⤵
PID:1559
- /bin/cp
  cp -f /tmp/9b40b639cec4ddfe9ff15820367ca67d /usr/bin/bsd-port/getty
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1560

/bin/sh
sh -c /usr/bin/bsd-port/getty
1⤵
PID:1562
- /usr/bin/bsd-port/getty
  /usr/bin/bsd-port/getty
  2⤵
  - Executes dropped EXE
  PID:1563

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

/bin/sh
sh -c "mkdir -p /usr/bin"
1⤵
PID:1567
- /bin/mkdir
  mkdir -p /usr/bin
  2⤵
  - Reads runtime system information
  PID:1568

/bin/sh
sh -c "cp -f /tmp/9b40b639cec4ddfe9ff15820367ca67d /usr/bin/.sshd"
1⤵
PID:1569
- /bin/cp
  cp -f /tmp/9b40b639cec4ddfe9ff15820367ca67d /usr/bin/.sshd
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1570

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc1.d/S99selinux"
1⤵
PID:1571
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc1.d/S99selinux
  2⤵
  PID:1572

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc2.d/S99selinux"
1⤵
PID:1573
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc2.d/S99selinux
  2⤵
  PID:1574

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc3.d/S99selinux"
1⤵
PID:1575
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc3.d/S99selinux
  2⤵
  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 /usr/bin/.sshd
1⤵
PID:1624
- /usr/bin/.sshd
  /usr/bin/.sshd
  2⤵
  - Executes dropped EXE
  PID:1625

/bin/sh
sh -c "insmod /usr/bin/bsd-port/xpacket.ko"
1⤵
PID:1629
- /sbin/insmod
  insmod /usr/bin/bsd-port/xpacket.ko
  2⤵
  - Reads runtime system information
  PID:1630

/bin/sh
sh -c "insmod /tmp/xpacket.ko"
1⤵
PID:1631
- /sbin/insmod
  insmod /tmp/xpacket.ko
  2⤵
  - Reads runtime system information
  PID:1632

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
ccc066dd79f6741251526282032c2820

SHA1
d31e249ad3c0e486000969295c61d6dcb825fc14

SHA256
8100d90a77a257b3033968b6b2a3aa232b32f3587b1361fa1e58a5fe5dd4c469

SHA512
716c2fc3397f90be0c30803dd8781b442490f613bf718d4e3d18c801244bc80ab06612777e9ff5b94424b92a406226512f5a54bec94ecaf4678b46833af53ed2

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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
d1a69640d53a32a9fb13e93d1c8f3104

SHA1
ad896e3ecf46771003093f24b88cd72af2225023

SHA256
6a27eece1c1658b237aede5c6c2b8af51d235ca08b2f7963b67d99caa7a12395

SHA512
100604d883bb248a24436fea1542cf81636e693256e0f0e8943c3cbdf7aa89bf759ddad050d1c3c487c07b00258dc0e6eefbc04d7109d7a788e2f8b98a9e3894

Download Submit
/tmp/moni.lod

Filesize
4B

MD5
bc573864331a9e42e4511de6f678aa83

SHA1
bdf3f54642b2d80f8e87b6474eaaad11ece8058a

SHA256
22fc91dc876c50db64efd0ebc175852518cd2bfe6143590af0b375b0b6c2df03

SHA512
168e30f3b0b42394f6a167d064d5e12b7c5234454bfb888cc06161d5753efb41ee4910280933c69583a0605070f68036ec35aee7ee41702c85fae05345abe4d5

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/tmp/notify.file

Filesize
37B

MD5
60e182d578fb3e3fc3dd0e33ad957d8e

SHA1
1128d2c514cdb1a3f973bf9fa998c0308cb415fd

SHA256
9c9c7f1871bc25d4810c6775dea466228eba0e925708a2a49a7bcbba65822ae7

SHA512
35d3e4c1a8552777d56bce435d325abc9653e759228a012534b14bad4adef297a0013186765421b6e7462bc6ba20cf5fc3cc174d0731741c4c3939cae274a5ed

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

Filesize
73B

MD5
2e5111bfdca6f5db3084c3c76ad257d7

SHA1
4854398484be73c219290928d28caf370c4ea99c

SHA256
50be1059d97fd3794356b61e96fa53046006cbc919dd9f117db43521d857a8b6

SHA512
a3b3f2b622c59a6c14ae087b15135fe544618ad1da77c46f3a251839176b4bd452a6e7bdfcec62fc032d292036f2ac03adfbfd9eefd69b7391e8f65b46e15b4c

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/usr/bin/bsd-port/getty

Filesize
1.5MB

MD5
9b40b639cec4ddfe9ff15820367ca67d

SHA1
40b22c42d9c10369ec814bf411153c9613fe5a63

SHA256
e2eab5338aa0006916a92e4f9e741adab84d977659d49bf03e6a3bd4b6660a30

SHA512
7a2d95c2321b4dc3a72e4d8876ce8e0f2d8602977c53bac6b1db4985ece6dcc6ce33d93f19ec87a1ea20cbaa4888e6d7b98ef510490eb5b0692394ef07d6b927

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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