mrblack | c6cb654b7c737c67b7fcc714839b108ecf503efaf4d581f59da58e783df4ac21

Analysis

max time kernel
45s
max time network
46s
platform
ubuntu-18.04_amd64
resource
ubuntu1804-amd64-20240226-en
resource tags

arch:amd64arch:i386image:ubuntu1804-amd64-20240226-enkernel:4.15.0-213-genericlocale:en-usos:ubuntu-18.04-amd64system
submitted
27-02-2024 02:36

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General

Target

c6cb654b7c737c67b7fcc714839b108ecf503efaf4d581f59da58e783df4ac21
Size

1.2MB
MD5

6e922435326fba001ebcddb3afde00aa
SHA1

ad41b157112936b7fc1029d32c97fecb606a80fe
SHA256

c6cb654b7c737c67b7fcc714839b108ecf503efaf4d581f59da58e783df4ac21
SHA512

e5e70a17ec59018381e1902530d81e5b808d926d3b8fee53e24355449a6c289dcd7013cbc3fa99f9a316bb968788a724b184555611686820277f11d85983fb92
SSDEEP

24576:e845rGHu6gVJKG75oFpA0VWeX4S2y1q2rJp0:745vRVJKGtSA0VWeohu9p0

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	1611	getty
/usr/bin/.sshd	1631	.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 8 IoCs

Hijack Execution Flow

T1574

description	ioc	Process
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
File opened for modification	/usr/bin/dpkgd/ps	cp
File opened for modification	/usr/bin/dpkgd/ss	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/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	mkdir
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	cp
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	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	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/c6cb654b7c737c67b7fcc714839b108ecf503efaf4d581f59da58e783df4ac21
/tmp/c6cb654b7c737c67b7fcc714839b108ecf503efaf4d581f59da58e783df4ac21
1⤵
PID:1588

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc1.d/S97DbSecuritySpt"
1⤵
PID:1593
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc1.d/S97DbSecuritySpt
  2⤵
  PID:1594

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc2.d/S97DbSecuritySpt"
1⤵
PID:1595
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc2.d/S97DbSecuritySpt
  2⤵
  PID:1596

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc3.d/S97DbSecuritySpt"
1⤵
PID:1597
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc3.d/S97DbSecuritySpt
  2⤵
  PID:1598

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc4.d/S97DbSecuritySpt"
1⤵
PID:1599
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc4.d/S97DbSecuritySpt
  2⤵
  PID:1600

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc5.d/S97DbSecuritySpt"
1⤵
PID:1601
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc5.d/S97DbSecuritySpt
  2⤵
  PID:1602

/bin/sh
sh -c "mkdir -p /usr/bin/bsd-port"
1⤵
PID:1603
- /bin/mkdir
  mkdir -p /usr/bin/bsd-port
  2⤵
  - Reads runtime system information
  PID:1604

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

/bin/sh
sh -c "cp -f /tmp/c6cb654b7c737c67b7fcc714839b108ecf503efaf4d581f59da58e783df4ac21 /usr/bin/bsd-port/getty"
1⤵
PID:1607
- /bin/cp
  cp -f /tmp/c6cb654b7c737c67b7fcc714839b108ecf503efaf4d581f59da58e783df4ac21 /usr/bin/bsd-port/getty
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1608

/bin/sh
sh -c /usr/bin/bsd-port/getty
1⤵
PID:1610
- /usr/bin/bsd-port/getty
  /usr/bin/bsd-port/getty
  2⤵
  - Executes dropped EXE
  PID:1611

/bin/sh
sh -c "mkdir -p /usr/bin"
1⤵
PID:1613
- /bin/mkdir
  mkdir -p /usr/bin
  2⤵
  - Reads runtime system information
  PID:1614

/bin/sh
sh -c "mkdir -p /usr/bin"
1⤵
PID:1615
- /bin/mkdir
  mkdir -p /usr/bin
  2⤵
  - Reads runtime system information
  PID:1616

/bin/sh
sh -c "cp -f /tmp/c6cb654b7c737c67b7fcc714839b108ecf503efaf4d581f59da58e783df4ac21 /usr/bin/.sshd"
1⤵
PID:1617
- /bin/cp
  cp -f /tmp/c6cb654b7c737c67b7fcc714839b108ecf503efaf4d581f59da58e783df4ac21 /usr/bin/.sshd
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1618

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc1.d/S99selinux"
1⤵
PID:1619
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc1.d/S99selinux
  2⤵
  PID:1620

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc2.d/S99selinux"
1⤵
PID:1621
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc2.d/S99selinux
  2⤵
  PID:1622

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc3.d/S99selinux"
1⤵
PID:1623
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc3.d/S99selinux
  2⤵
  PID:1624

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc4.d/S99selinux"
1⤵
PID:1625
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc4.d/S99selinux
  2⤵
  PID:1626

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc5.d/S99selinux"
1⤵
PID:1627
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc5.d/S99selinux
  2⤵
  PID:1628

/bin/sh
sh -c /usr/bin/.sshd
1⤵
PID:1630
- /usr/bin/.sshd
  /usr/bin/.sshd
  2⤵
  - Executes dropped EXE
  PID:1631

/bin/sh
sh -c "mkdir -p /usr/bin/dpkgd"
1⤵
PID:1632
- /bin/mkdir
  mkdir -p /usr/bin/dpkgd
  2⤵
  - Reads runtime system information
  PID:1633

/bin/sh
sh -c "cp -f /bin/ps /usr/bin/dpkgd/ps"
1⤵
PID:1634
- /bin/cp
  cp -f /bin/ps /usr/bin/dpkgd/ps
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1635

/bin/sh
sh -c "mkdir -p /bin"
1⤵
PID:1636
- /bin/mkdir
  mkdir -p /bin
  2⤵
  - Reads runtime system information
  PID:1637

/bin/sh
sh -c "mkdir -p /bin"
1⤵
PID:1638
- /bin/mkdir
  mkdir -p /bin
  2⤵
  - Reads runtime system information
  PID:1639

/bin/sh
sh -c "cp -f /usr/bin/bsd-port/getty /bin/ps"
1⤵
PID:1640
- /bin/cp
  cp -f /usr/bin/bsd-port/getty /bin/ps
  2⤵
  - Writes file to system bin folder
  - Reads runtime system information
  PID:1641

/bin/sh
sh -c "chmod 0755 /bin/ps"
1⤵
PID:1642
- /bin/chmod
  chmod 0755 /bin/ps
  2⤵
  PID:1643

/bin/sh
sh -c "cp -f /bin/ss /usr/bin/dpkgd/ss"
1⤵
PID:1644
- /bin/cp
  cp -f /bin/ss /usr/bin/dpkgd/ss
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1645

/bin/sh
sh -c "mkdir -p /bin"
1⤵
PID:1646
- /bin/mkdir
  mkdir -p /bin
  2⤵
  - Reads runtime system information
  PID:1647

/bin/sh
sh -c "mkdir -p /bin"
1⤵
PID:1648
- /bin/mkdir
  mkdir -p /bin
  2⤵
  - Reads runtime system information
  PID:1649

/bin/sh
sh -c "cp -f /usr/bin/bsd-port/getty /bin/ss"
1⤵
PID:1650
- /bin/cp
  cp -f /usr/bin/bsd-port/getty /bin/ss
  2⤵
  - Writes file to system bin folder
  - Reads runtime system information
  PID:1651

/bin/sh
sh -c "chmod 0755 /bin/ss"
1⤵
PID:1652
- /bin/chmod
  chmod 0755 /bin/ss
  2⤵
  PID:1653

/bin/sh
sh -c "cp -f /usr/bin/lsof /usr/bin/dpkgd/lsof"
1⤵
PID:1654
- /bin/cp
  cp -f /usr/bin/lsof /usr/bin/dpkgd/lsof
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1655

/bin/sh
sh -c "mkdir -p /usr/bin"
1⤵
PID:1656
- /bin/mkdir
  mkdir -p /usr/bin
  2⤵
  - Reads runtime system information
  PID:1657

/bin/sh
sh -c "mkdir -p /usr/bin"
1⤵
PID:1658
- /bin/mkdir
  mkdir -p /usr/bin
  2⤵
  - Reads runtime system information
  PID:1659

/bin/sh
sh -c "cp -f /usr/bin/bsd-port/getty /usr/bin/lsof"
1⤵
PID:1660
- /bin/cp
  cp -f /usr/bin/bsd-port/getty /usr/bin/lsof
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1661

/bin/sh
sh -c "chmod 0755 /usr/bin/lsof"
1⤵
PID:1662
- /bin/chmod
  chmod 0755 /usr/bin/lsof
  2⤵
  PID:1663

/bin/sh
sh -c "insmod /usr/bin/bsd-port/xpacket.ko"
1⤵
PID:1666
- /sbin/insmod
  insmod /usr/bin/bsd-port/xpacket.ko
  2⤵
  - Reads runtime system information
  PID:1667

/bin/sh
sh -c "insmod /tmp/xpacket.ko"
1⤵
PID:1677
- /sbin/insmod
  insmod /tmp/xpacket.ko
  2⤵
  - Reads runtime system information
  PID:1678

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
82B

MD5
728ae4c8493d53c175ede20bca925cba

SHA1
3ec55173fb9f6e97c7aa4be87741f587404fae1d

SHA256
41a2f995febb7467a6948531262a4554bd97de4e7f9c2111fd9de0aa76747636

SHA512
1fc69e7cb05df46dec4e58fefff56b6d7cceb307d34c59efe73c0c200c174e785bcb5f8e8123a2c7024eee79fda2e5ffded503077bf76d9b7b320131be7b05f9

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/etc/init.d/selinux

Filesize
36B

MD5
993cc15058142d96c3daf7852c3d5ee8

SHA1
0950b8b391b04dd3895ea33cd3141543ebd2525d

SHA256
8171d077918611803d93088409f220c66fae1c670b297e1aa5d8cbd548ce9208

SHA512
0c4256c00a3710f97e92581b552682b36b62afc35fe72622c491323c618c19ea62611ac04ccafc3dfcde2254a2ebbd93b69b66795b16e36332293bed83adb928

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/tmp/gates.lod

Filesize
4B

MD5
dca5672ff3444c7e997aa9a2c4eb2094

SHA1
cdd8b8ab7d8c4ad5c8c0a829f5aa80c2ae7d5fed

SHA256
c5080dbc42e822a31c72ebf171d79394f57bba1e0511bad4a721c2c0f62ae6b3

SHA512
0119f9ebc71ba2f8ab8ee60f6560ba30ef9d9427d028ca186463a44c25a9aafb8d8dbefeff991afce20ce40da9932ac3137140c012e960596421943bc42313db

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/tmp/moni.lod

Filesize
4B

MD5
4f398cb9d6bc79ae567298335b51ba8a

SHA1
776f707e19f39e6b830856a6cdf3aa605a5a283e

SHA256
5aca6f08b6780157a0da46aaaef9d86d2fe55919395b0e2aba71e52a377db90d

SHA512
6ea469870849ab48a14a65e433a1dd2fd7741ea7ed01c586424111f35256737a861c4527c66528b3ea489a6e22ed4732074167fdb152de9441d2f1958e94beca

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/tmp/notify.file

Filesize
69B

MD5
cdd13f88f37a66af19fb5c48a7f37f9c

SHA1
c093f30a2aa885a98102b5311f94fae57e341599

SHA256
5f390dba578d167c2079eb6651857c45118dff79b9eeb2fc893cadbd11dd48da

SHA512
70b9b1a63a3c9e7cf828843f9e6bd525e5ca418f5059b151a801bcdd7688fbfd1205cae27afd2012d3c7cfcd865699f60798cd2d084a9b7f22af20610b013348

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/usr/bin/bsd-port/getty

Filesize
1.2MB

MD5
6e922435326fba001ebcddb3afde00aa

SHA1
ad41b157112936b7fc1029d32c97fecb606a80fe

SHA256
c6cb654b7c737c67b7fcc714839b108ecf503efaf4d581f59da58e783df4ac21

SHA512
e5e70a17ec59018381e1902530d81e5b808d926d3b8fee53e24355449a6c289dcd7013cbc3fa99f9a316bb968788a724b184555611686820277f11d85983fb92

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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

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/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