mrblack | fab8944e3f0541c0ff149306ea74137f7c1e9c081670906844769a45aa7171b4

Resubmissions

22-03-2024 16:06

240322-tkbewafh2t 10

22-03-2024 16:03

240322-thwb9sfg8t 10

22-03-2024 08:44

240322-km5xtsae28 10

Analysis

max time kernel
149s
max time network
150s
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
22-03-2024 16:03

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General

Target

9c65f61859b4b8ae00c79ddd63abf60d.elf
Size

1.2MB
MD5

9c65f61859b4b8ae00c79ddd63abf60d
SHA1

ddf2c1d0abdef832ec746004dcdfd0cd800048ae
SHA256

fab8944e3f0541c0ff149306ea74137f7c1e9c081670906844769a45aa7171b4
SHA512

ed39ef838a9cdff65e891f65a98800ebd282645e13d9f83a6b620e3bc573a3fae8e5f312136b970977a4cdbdf5a0e600be401cf425a2d673d30c715562ab163e
SSDEEP

24576:e845rGHu6gVJKG75oFpA0VWeX4a2y1q2rJp0:745vRVJKGtSA0VWeoZu9p0

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	1585	getty
/usr/bin/.sshd	1615	.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/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/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/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	cp
File opened for reading	/proc/filesystems	cp
File opened for reading	/proc/cmdline	insmod
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	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/filesystems	mkdir
File opened for reading	/proc/stat	Process not Found
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/meminfo	Process not Found

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/9c65f61859b4b8ae00c79ddd63abf60d.elf
/tmp/9c65f61859b4b8ae00c79ddd63abf60d.elf
1⤵
PID:1560

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc1.d/S97DbSecuritySpt"
1⤵
PID:1565
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc1.d/S97DbSecuritySpt
  2⤵
  PID:1566

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc2.d/S97DbSecuritySpt"
1⤵
PID:1567
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc2.d/S97DbSecuritySpt
  2⤵
  PID:1568

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc3.d/S97DbSecuritySpt"
1⤵
PID:1569
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc3.d/S97DbSecuritySpt
  2⤵
  PID:1570

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc4.d/S97DbSecuritySpt"
1⤵
PID:1571
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc4.d/S97DbSecuritySpt
  2⤵
  PID:1572

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc5.d/S97DbSecuritySpt"
1⤵
PID:1573
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc5.d/S97DbSecuritySpt
  2⤵
  PID:1574

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

/bin/sh
sh -c "mkdir -p /usr/bin/bsd-port"
1⤵
PID:1579
- /bin/mkdir
  mkdir -p /usr/bin/bsd-port
  2⤵
  - Reads runtime system information
  PID:1580

/bin/sh
sh -c "cp -f /tmp/9c65f61859b4b8ae00c79ddd63abf60d.elf /usr/bin/bsd-port/getty"
1⤵
PID:1581
- /bin/cp
  cp -f /tmp/9c65f61859b4b8ae00c79ddd63abf60d.elf /usr/bin/bsd-port/getty
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1582

/bin/sh
sh -c /usr/bin/bsd-port/getty
1⤵
PID:1584
- /usr/bin/bsd-port/getty
  /usr/bin/bsd-port/getty
  2⤵
  - Executes dropped EXE
  PID:1585

/bin/sh
sh -c "mkdir -p /usr/bin"
1⤵
PID:1587
- /bin/mkdir
  mkdir -p /usr/bin
  2⤵
  - Reads runtime system information
  PID:1588

/bin/sh
sh -c "mkdir -p /usr/bin"
1⤵
PID:1589
- /bin/mkdir
  mkdir -p /usr/bin
  2⤵
  - Reads runtime system information
  PID:1590

/bin/sh
sh -c "cp -f /tmp/9c65f61859b4b8ae00c79ddd63abf60d.elf /usr/bin/.sshd"
1⤵
PID:1591
- /bin/cp
  cp -f /tmp/9c65f61859b4b8ae00c79ddd63abf60d.elf /usr/bin/.sshd
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1592

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc1.d/S99selinux"
1⤵
PID:1593
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc1.d/S99selinux
  2⤵
  PID:1594

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc2.d/S99selinux"
1⤵
PID:1595
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc2.d/S99selinux
  2⤵
  PID:1596

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc3.d/S99selinux"
1⤵
PID:1597
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc3.d/S99selinux
  2⤵
  PID:1598

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc4.d/S99selinux"
1⤵
PID:1599
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc4.d/S99selinux
  2⤵
  PID:1600

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc5.d/S99selinux"
1⤵
PID:1601
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc5.d/S99selinux
  2⤵
  PID:1602

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

/bin/sh
sh -c "cp -f /bin/ps /usr/bin/dpkgd/ps"
1⤵
PID:1605
- /bin/cp
  cp -f /bin/ps /usr/bin/dpkgd/ps
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1606

/bin/sh
sh -c "mkdir -p /bin"
1⤵
PID:1607
- /bin/mkdir
  mkdir -p /bin
  2⤵
  - Reads runtime system information
  PID:1608

/bin/sh
sh -c "mkdir -p /bin"
1⤵
PID:1609
- /bin/mkdir
  mkdir -p /bin
  2⤵
  - Reads runtime system information
  PID:1610

/bin/sh
sh -c "cp -f /usr/bin/bsd-port/getty /bin/ps"
1⤵
PID:1611
- /bin/cp
  cp -f /usr/bin/bsd-port/getty /bin/ps
  2⤵
  - Writes file to system bin folder
  - Reads runtime system information
  PID:1612

/bin/sh
sh -c /usr/bin/.sshd
1⤵
PID:1614
- /usr/bin/.sshd
  /usr/bin/.sshd
  2⤵
  - Executes dropped EXE
  PID:1615

/bin/sh
sh -c "chmod 0755 /bin/ps"
1⤵
PID:1616
- /bin/chmod
  chmod 0755 /bin/ps
  2⤵
  PID:1617

/bin/sh
sh -c "cp -f /bin/ss /usr/bin/dpkgd/ss"
1⤵
PID:1618
- /bin/cp
  cp -f /bin/ss /usr/bin/dpkgd/ss
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1619

/bin/sh
sh -c "mkdir -p /bin"
1⤵
PID:1620
- /bin/mkdir
  mkdir -p /bin
  2⤵
  - Reads runtime system information
  PID:1621

/bin/sh
sh -c "mkdir -p /bin"
1⤵
PID:1622
- /bin/mkdir
  mkdir -p /bin
  2⤵
  - Reads runtime system information
  PID:1623

/bin/sh
sh -c "cp -f /usr/bin/bsd-port/getty /bin/ss"
1⤵
PID:1624
- /bin/cp
  cp -f /usr/bin/bsd-port/getty /bin/ss
  2⤵
  - Writes file to system bin folder
  - Reads runtime system information
  PID:1625

/bin/sh
sh -c "chmod 0755 /bin/ss"
1⤵
PID:1626
- /bin/chmod
  chmod 0755 /bin/ss
  2⤵
  PID:1627

/bin/sh
sh -c "cp -f /usr/bin/lsof /usr/bin/dpkgd/lsof"
1⤵
PID:1628
- /bin/cp
  cp -f /usr/bin/lsof /usr/bin/dpkgd/lsof
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1629

/bin/sh
sh -c "mkdir -p /usr/bin"
1⤵
PID:1630
- /bin/mkdir
  mkdir -p /usr/bin
  2⤵
  - Reads runtime system information
  PID:1631

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

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

/bin/sh
sh -c "chmod 0755 /usr/bin/lsof"
1⤵
PID:1636
- /bin/chmod
  chmod 0755 /usr/bin/lsof
  2⤵
  PID:1637

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

/bin/sh
sh -c "insmod /tmp/xpacket.ko"
1⤵
PID:1646
- /sbin/insmod
  insmod /tmp/xpacket.ko
  2⤵
  - Reads runtime system information
  PID:1647

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
54B

MD5
c72f90e3e98d1e442f1c67250d65462e

SHA1
1226c9d54cd8f96cd14bdb3145b8e8feb552fac5

SHA256
933e302e728da769ffdf8f69c9dd2ed8519ef8bd832c94804446b4ad95f1b55e

SHA512
25e3d20741be4ceca8e8320e7853ece8224895f6b7ec3d624b84cb37c7989aff6d9ee83331f55ea42bd07a71840176fe0058c23ea25c792de5ad583d012e58ca

Download Submit
/etc/init.d/selinux

Filesize
36B

MD5
993cc15058142d96c3daf7852c3d5ee8

SHA1
0950b8b391b04dd3895ea33cd3141543ebd2525d

SHA256
8171d077918611803d93088409f220c66fae1c670b297e1aa5d8cbd548ce9208

SHA512
0c4256c00a3710f97e92581b552682b36b62afc35fe72622c491323c618c19ea62611ac04ccafc3dfcde2254a2ebbd93b69b66795b16e36332293bed83adb928

Download Submit
/tmp/gates.lod

Filesize
4B

MD5
b132ecc1609bfcf302615847c1caa69a

SHA1
0310477142171b7d67f2a1cd85c90a3b66be9c57

SHA256
8bcefa497af26e688b555d1c4c8cc97365522b5a1416ceb099a98b4c2ed80585

SHA512
816f74839aff001255a4e3fdbc354fd23aeaada1bbd44148e4fad015650143c818f741024cac050b6a4e22ce4d8d64b9591078a1d46d4776a6c51077b937bed0

Download Submit
/tmp/moni.lod

Filesize
4B

MD5
7e230522657ecdc50e4249581b861f8e

SHA1
db0477132b98737a6964423def574c8f78307501

SHA256
6df26dfff059f42aeb0607a761d34c2b820af73ab0c5bfb111f7fe9dadda850a

SHA512
dc5217e95f410349c1c25fdb340a412438068f536dc73bc340f6c1a731112cd99f454d3dbd242e1db0d04bed9b2909881c4a37a891fa7900c71a995c135f7ec6

Download Submit
/tmp/notify.file

Filesize
41B

MD5
aada6ae77c35c99d34d3c1fa2bc89bd4

SHA1
eef93661c4caa0a32ec663a0462718d60d279fee

SHA256
55578939d73ca332c68f76d7e88818a529fee6990dfa757a9bf41a9735a56deb

SHA512
781ed7115d089dc7f57e85d2396da1c23041e5738d6e800393b80d2b4971dfcffabec57b1ee06c87228eee832b658a57dfc20cd5a534bd765760cd3d85526d85

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

Filesize
73B

MD5
a14cf3fc2481168aefc6f65da37cc4ca

SHA1
eb51eba05300c92f52fed7fbcadf771d32fc84e1

SHA256
c2a71ef12a45929f4bd6e8a349945b9762f95d55c53ac3939f145ba9106a69f4

SHA512
4f96cac782b2aa8608f4f00006f5778d0161db09640e1e4e0925218e97756071de427e6a685486f5faeae2df34cff789d8bde0cdac88f8d7d7520d8a6ade1d42

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

Filesize
1.2MB

MD5
9c65f61859b4b8ae00c79ddd63abf60d

SHA1
ddf2c1d0abdef832ec746004dcdfd0cd800048ae

SHA256
fab8944e3f0541c0ff149306ea74137f7c1e9c081670906844769a45aa7171b4

SHA512
ed39ef838a9cdff65e891f65a98800ebd282645e13d9f83a6b620e3bc573a3fae8e5f312136b970977a4cdbdf5a0e600be401cf425a2d673d30c715562ab163e

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/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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Resubmissions

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads