mrblack | 8a7ba745053dfffc5c28ebebb6ce98a9b615d501cdaae92be9be2a9e00ca92e0

Analysis

max time kernel
149s
max time network
147s
platform
ubuntu-18.04_amd64
resource
ubuntu1804-amd64-20231221-en
resource tags

arch:amd64arch:i386image:ubuntu1804-amd64-20231221-enkernel:4.15.0-213-genericlocale:en-usos:ubuntu-18.04-amd64system
submitted
21-02-2024 01:34

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General

Target

d8d522f2f72de16a235c17b6d32bad930d2a21a8c2664a76880c9b4b53ec1b58.elf
Size

1.2MB
MD5

2264f9e9ec3736a89b2cdf9a926c70ee
SHA1

69684148423e3540f4f8c7bc787d102ea7b84db5
SHA256

d8d522f2f72de16a235c17b6d32bad930d2a21a8c2664a76880c9b4b53ec1b58
SHA512

39b6f2d778ce3c8832cfe13231edcc0a824c1f19aa6da5168cffd384edaaa033c75af87788ebc46087fbbe7b76d43b1c1f575d0b750d8e709616a903420d5461
SSDEEP

24576:e845rGHu6gVJKG75oFpA0VWeX4c2y1q2rJp0:745vRVJKGtSA0VWeoTu9p0

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	1552	getty
/usr/bin/.sshd	1576	.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/lsof	cp
File opened for modification	/usr/bin/bsd-port/conf.n	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/ss	cp
File opened for modification	/usr/bin/dpkgd/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

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	cp
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/filesystems	mkdir
File opened for reading	/proc/filesystems	cp
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/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/meminfo	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	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/d8d522f2f72de16a235c17b6d32bad930d2a21a8c2664a76880c9b4b53ec1b58.elf
/tmp/d8d522f2f72de16a235c17b6d32bad930d2a21a8c2664a76880c9b4b53ec1b58.elf
1⤵
PID:1529

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc1.d/S97DbSecuritySpt"
1⤵
PID:1534
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc1.d/S97DbSecuritySpt
  2⤵
  PID:1535

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc2.d/S97DbSecuritySpt"
1⤵
PID:1536
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc2.d/S97DbSecuritySpt
  2⤵
  PID:1537

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc3.d/S97DbSecuritySpt"
1⤵
PID:1538
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc3.d/S97DbSecuritySpt
  2⤵
  PID:1539

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc4.d/S97DbSecuritySpt"
1⤵
PID:1540
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc4.d/S97DbSecuritySpt
  2⤵
  PID:1541

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc5.d/S97DbSecuritySpt"
1⤵
PID:1542
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc5.d/S97DbSecuritySpt
  2⤵
  PID:1543

/bin/sh
sh -c "mkdir -p /usr/bin/bsd-port"
1⤵
PID:1544
- /bin/mkdir
  mkdir -p /usr/bin/bsd-port
  2⤵
  - Reads runtime system information
  PID:1545

/bin/sh
sh -c "mkdir -p /usr/bin/bsd-port"
1⤵
PID:1546
- /bin/mkdir
  mkdir -p /usr/bin/bsd-port
  2⤵
  - Reads runtime system information
  PID:1547

/bin/sh
sh -c "cp -f /tmp/d8d522f2f72de16a235c17b6d32bad930d2a21a8c2664a76880c9b4b53ec1b58.elf /usr/bin/bsd-port/getty"
1⤵
PID:1548
- /bin/cp
  cp -f /tmp/d8d522f2f72de16a235c17b6d32bad930d2a21a8c2664a76880c9b4b53ec1b58.elf /usr/bin/bsd-port/getty
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1549

/bin/sh
sh -c /usr/bin/bsd-port/getty
1⤵
PID:1551
- /usr/bin/bsd-port/getty
  /usr/bin/bsd-port/getty
  2⤵
  - Executes dropped EXE
  PID:1552

/bin/sh
sh -c "mkdir -p /usr/bin"
1⤵
PID:1554
- /bin/mkdir
  mkdir -p /usr/bin
  2⤵
  - Reads runtime system information
  PID:1555

/bin/sh
sh -c "mkdir -p /usr/bin"
1⤵
PID:1556
- /bin/mkdir
  mkdir -p /usr/bin
  2⤵
  - Reads runtime system information
  PID:1557

/bin/sh
sh -c "cp -f /tmp/d8d522f2f72de16a235c17b6d32bad930d2a21a8c2664a76880c9b4b53ec1b58.elf /usr/bin/.sshd"
1⤵
PID:1558
- /bin/cp
  cp -f /tmp/d8d522f2f72de16a235c17b6d32bad930d2a21a8c2664a76880c9b4b53ec1b58.elf /usr/bin/.sshd
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1559

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc1.d/S99selinux"
1⤵
PID:1560
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc1.d/S99selinux
  2⤵
  PID:1561

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc2.d/S99selinux"
1⤵
PID:1562
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc2.d/S99selinux
  2⤵
  PID:1563

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc3.d/S99selinux"
1⤵
PID:1564
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc3.d/S99selinux
  2⤵
  PID:1565

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc4.d/S99selinux"
1⤵
PID:1566
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc4.d/S99selinux
  2⤵
  PID:1567

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc5.d/S99selinux"
1⤵
PID:1568
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc5.d/S99selinux
  2⤵
  PID:1569

/bin/sh
sh -c "mkdir -p /usr/bin/dpkgd"
1⤵
PID:1570
- /bin/mkdir
  mkdir -p /usr/bin/dpkgd
  2⤵
  - Reads runtime system information
  PID:1571

/bin/sh
sh -c "cp -f /bin/ps /usr/bin/dpkgd/ps"
1⤵
PID:1572
- /bin/cp
  cp -f /bin/ps /usr/bin/dpkgd/ps
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1573

/bin/sh
sh -c /usr/bin/.sshd
1⤵
PID:1575
- /usr/bin/.sshd
  /usr/bin/.sshd
  2⤵
  - Executes dropped EXE
  PID:1576

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

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

/bin/sh
sh -c "cp -f /usr/bin/bsd-port/getty /bin/ps"
1⤵
PID:1581
- /bin/cp
  cp -f /usr/bin/bsd-port/getty /bin/ps
  2⤵
  - Writes file to system bin folder
  - Reads runtime system information
  PID:1582

/bin/sh
sh -c "chmod 0755 /bin/ps"
1⤵
PID:1583
- /bin/chmod
  chmod 0755 /bin/ps
  2⤵
  PID:1584

/bin/sh
sh -c "cp -f /bin/ss /usr/bin/dpkgd/ss"
1⤵
PID:1585
- /bin/cp
  cp -f /bin/ss /usr/bin/dpkgd/ss
  2⤵
  - Write file to user bin folder
  - 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 "mkdir -p /bin"
1⤵
PID:1589
- /bin/mkdir
  mkdir -p /bin
  2⤵
  - Reads runtime system information
  PID:1590

/bin/sh
sh -c "cp -f /usr/bin/bsd-port/getty /bin/ss"
1⤵
PID:1591
- /bin/cp
  cp -f /usr/bin/bsd-port/getty /bin/ss
  2⤵
  - Writes file to system bin folder
  - Reads runtime system information
  PID:1592

/bin/sh
sh -c "chmod 0755 /bin/ss"
1⤵
PID:1593
- /bin/chmod
  chmod 0755 /bin/ss
  2⤵
  PID:1594

/bin/sh
sh -c "cp -f /usr/bin/lsof /usr/bin/dpkgd/lsof"
1⤵
PID:1595
- /bin/cp
  cp -f /usr/bin/lsof /usr/bin/dpkgd/lsof
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1596

/bin/sh
sh -c "mkdir -p /usr/bin"
1⤵
PID:1597
- /bin/mkdir
  mkdir -p /usr/bin
  2⤵
  - Reads runtime system information
  PID:1598

/bin/sh
sh -c "mkdir -p /usr/bin"
1⤵
PID:1599
- /bin/mkdir
  mkdir -p /usr/bin
  2⤵
  - Reads runtime system information
  PID:1600

/bin/sh
sh -c "cp -f /usr/bin/bsd-port/getty /usr/bin/lsof"
1⤵
PID:1601
- /bin/cp
  cp -f /usr/bin/bsd-port/getty /usr/bin/lsof
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1602

/bin/sh
sh -c "chmod 0755 /usr/bin/lsof"
1⤵
PID:1603
- /bin/chmod
  chmod 0755 /usr/bin/lsof
  2⤵
  PID:1604

/bin/sh
sh -c "insmod /usr/bin/bsd-port/xpacket.ko"
1⤵
PID:1607
- /sbin/insmod
  insmod /usr/bin/bsd-port/xpacket.ko
  2⤵
  - Reads runtime system information
  PID:1608

/bin/sh
sh -c "insmod /tmp/xpacket.ko"
1⤵
PID:1613
- /sbin/insmod
  insmod /tmp/xpacket.ko
  2⤵
  - Reads runtime system information
  PID:1614

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
86B

MD5
d774f0703abfe88cccec8aad7159bf00

SHA1
a379d96b025bcd6542d5a0cee765db3b34488fa9

SHA256
8e6124734ffe419c3508ae5ebe8256db6ddc6865433d9b77a9ca717eeb68d55e

SHA512
659acd8f584e142bbafacf0f109fec1ed0c18b854de71081eb0f4ff8a5f8fbd0957ca05d994aab858ed7b12c2df7c9a02d56aae6280b3b32419d196b09ff6288

Download Submit
/etc/init.d/selinux

Filesize
36B

MD5
993cc15058142d96c3daf7852c3d5ee8

SHA1
0950b8b391b04dd3895ea33cd3141543ebd2525d

SHA256
8171d077918611803d93088409f220c66fae1c670b297e1aa5d8cbd548ce9208

SHA512
0c4256c00a3710f97e92581b552682b36b62afc35fe72622c491323c618c19ea62611ac04ccafc3dfcde2254a2ebbd93b69b66795b16e36332293bed83adb928

Download Submit
/tmp/moni.lod

Filesize
4B

MD5
f18a6d1cde4b205199de8729a6637b42

SHA1
2fdd02f8f1222ac5b66ec221c8ff66d62695b11c

SHA256
5909daa6fb5cf239d52027367f111ecd9c280866d73f8bd47cda43ef5495af6a

SHA512
3407704df3075afe3710ea8c7b64a54f572e311c24de4299fafb95203ac100326b1a9aec57289285ad641b51de049eb2b3ee66180b74c7bfda1b82b8664b9fc2

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/tmp/notify.file

Filesize
73B

MD5
88a8563a96e4d5abeb4613fcca2eda7b

SHA1
20177859efbf27e8c5800f93e191f119f3532b81

SHA256
3e2d2d28fe2ba0209661b993d68d48930b6b4ebaa0ac031ea02bf92f761ee50d

SHA512
c8f4f219835b1d01df230ab70d12c68eec7c72ed4c05c08e4fd713c8fe7fe68bbce3e0c160c2b2e5bc20e0ffb941348d003fc6a30c08b9799b5c83a7e7b6db54

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

Filesize
73B

MD5
ca788523e9085f4003af4253997d2b7d

SHA1
7ac038e86880830af6de2f00d6c4033df16c02bd

SHA256
61c7fe9fc03110f3bce6d5977ac93891a1b3b3340a5db3162d5f7e4857089f06

SHA512
50c3c764c2a2556abc7930c9fb53be3af84dc1947d05bf79d8766bc783d0303938cb96936033e7ca808ff17314a0d14a1f2f02cbbd95b1fd338f723771544ee7

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/usr/bin/bsd-port/getty

Filesize
1.2MB

MD5
2264f9e9ec3736a89b2cdf9a926c70ee

SHA1
69684148423e3540f4f8c7bc787d102ea7b84db5

SHA256
d8d522f2f72de16a235c17b6d32bad930d2a21a8c2664a76880c9b4b53ec1b58

SHA512
39b6f2d778ce3c8832cfe13231edcc0a824c1f19aa6da5168cffd384edaaa033c75af87788ebc46087fbbe7b76d43b1c1f575d0b750d8e709616a903420d5461

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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