mrblack | 913b27ed6c2bb0f654cfbc8d8dadbf3b187ca4916a56d6397808f1582b826ef4

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
21/12/2023, 23:34

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General

Target

27201c2352dc520fea6cd5d52680cb62
Size

1.5MB
MD5

27201c2352dc520fea6cd5d52680cb62
SHA1

7a8b40a3750419a2dfa0e86b9dc9f42cace11ebd
SHA256

913b27ed6c2bb0f654cfbc8d8dadbf3b187ca4916a56d6397808f1582b826ef4
SHA512

256688e4ed7aa985b5e868773add6bba2a09ec5cfa883a02287cbd5865b041bc2a984e1b3fd43f81148fb0a89144dc3cfa5969fc3b7da169d28085903586eb5a
SSDEEP

49152:2nilOolLbt1laIunbZsehknS55555555555555555555555555555555555k55w1:yeOolLbt1laIunlsehHNtYi7COEm

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	1572	getty
/usr/bin/.sshd	1588	.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/.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/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/bsd-port/conf.n	Process not Found
File opened for modification	/usr/bin/bsd-port/getty.lock	Process not Found
File opened for modification	/usr/bin/dpkgd/ps	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	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/stat	Process not Found
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	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	cp
File opened for reading	/proc/cmdline	insmod
File opened for reading	/proc/filesystems	mkdir
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	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/27201c2352dc520fea6cd5d52680cb62
/tmp/27201c2352dc520fea6cd5d52680cb62
1⤵
PID:1539

/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:1564
- /bin/mkdir
  mkdir -p /usr/bin/bsd-port
  2⤵
  - Reads runtime system information
  PID:1565

/bin/sh
sh -c "mkdir -p /usr/bin/bsd-port"
1⤵
PID:1566
- /bin/mkdir
  mkdir -p /usr/bin/bsd-port
  2⤵
  - Reads runtime system information
  PID:1567

/bin/sh
sh -c "cp -f /tmp/27201c2352dc520fea6cd5d52680cb62 /usr/bin/bsd-port/getty"
1⤵
PID:1568
- /bin/cp
  cp -f /tmp/27201c2352dc520fea6cd5d52680cb62 /usr/bin/bsd-port/getty
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1569

/bin/sh
sh -c /usr/bin/bsd-port/getty
1⤵
PID:1571
- /usr/bin/bsd-port/getty
  /usr/bin/bsd-port/getty
  2⤵
  - Executes dropped EXE
  PID:1572

/bin/sh
sh -c "mkdir -p /usr/bin"
1⤵
PID:1574
- /bin/mkdir
  mkdir -p /usr/bin
  2⤵
  - Reads runtime system information
  PID:1575

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

/bin/sh
sh -c "cp -f /tmp/27201c2352dc520fea6cd5d52680cb62 /usr/bin/.sshd"
1⤵
PID:1578
- /bin/cp
  cp -f /tmp/27201c2352dc520fea6cd5d52680cb62 /usr/bin/.sshd
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1579

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc1.d/S99selinux"
1⤵
PID:1580
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc1.d/S99selinux
  2⤵
  PID:1581

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc2.d/S99selinux"
1⤵
PID:1582
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc2.d/S99selinux
  2⤵
  PID:1583

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc3.d/S99selinux"
1⤵
PID:1584
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc3.d/S99selinux
  2⤵
  PID:1585

/bin/sh
sh -c /usr/bin/.sshd
1⤵
PID:1587
- /usr/bin/.sshd
  /usr/bin/.sshd
  2⤵
  - Executes dropped EXE
  PID:1588

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc4.d/S99selinux"
1⤵
PID:1589
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc4.d/S99selinux
  2⤵
  PID:1590

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc5.d/S99selinux"
1⤵
PID:1591
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc5.d/S99selinux
  2⤵
  PID:1592

/bin/sh
sh -c "mkdir -p /usr/bin/dpkgd"
1⤵
PID:1593
- /bin/mkdir
  mkdir -p /usr/bin/dpkgd
  2⤵
  - Reads runtime system information
  PID:1594

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

/bin/sh
sh -c "mkdir -p /bin"
1⤵
PID:1600
- /bin/mkdir
  mkdir -p /bin
  2⤵
  - Reads runtime system information
  PID:1601

/bin/sh
sh -c "mkdir -p /bin"
1⤵
PID:1602
- /bin/mkdir
  mkdir -p /bin
  2⤵
  - Reads runtime system information
  PID:1603

/bin/sh
sh -c "cp -f /usr/bin/bsd-port/getty /bin/ps"
1⤵
PID:1604
- /bin/cp
  cp -f /usr/bin/bsd-port/getty /bin/ps
  2⤵
  - Writes file to system bin folder
  - Reads runtime system information
  PID:1605

/bin/sh
sh -c "chmod 0755 /bin/ps"
1⤵
PID:1606
- /bin/chmod
  chmod 0755 /bin/ps
  2⤵
  PID:1607

/bin/sh
sh -c "cp -f /bin/ss /usr/bin/dpkgd/ss"
1⤵
PID:1608
- /bin/cp
  cp -f /bin/ss /usr/bin/dpkgd/ss
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1609

/bin/sh
sh -c "mkdir -p /bin"
1⤵
PID:1610
- /bin/mkdir
  mkdir -p /bin
  2⤵
  - Reads runtime system information
  PID:1611

/bin/sh
sh -c "mkdir -p /bin"
1⤵
PID:1612
- /bin/mkdir
  mkdir -p /bin
  2⤵
  - Reads runtime system information
  PID:1613

/bin/sh
sh -c "cp -f /usr/bin/bsd-port/getty /bin/ss"
1⤵
PID:1614
- /bin/cp
  cp -f /usr/bin/bsd-port/getty /bin/ss
  2⤵
  - Writes file to system bin folder
  - Reads runtime system information
  PID:1615

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

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

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

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

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

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

/bin/sh
sh -c "insmod /tmp/xpacket.ko"
1⤵
PID:1628
- /sbin/insmod
  insmod /tmp/xpacket.ko
  2⤵
  - Reads runtime system information
  PID:1629

/bin/sh
sh -c "insmod /usr/bin/bsd-port/xpacket.ko"
1⤵
PID:1630
- /sbin/insmod
  insmod /usr/bin/bsd-port/xpacket.ko
  2⤵
  - Reads runtime system information
  PID:1631

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
8f1f452e37256d5065f4b1d090d42883

SHA1
71cdece53b36c94777d84034d82360aea3b4d8f8

SHA256
e9656e88ddcef8e2ac1bd42c6a3a39c06690a1c464afc463d04df2767c296fcc

SHA512
4c7a798119bac324a4ac96d1b48dc135f6eb6b0961de836ca99d30dde0544cb3bf1972e69ed3bde89d14a6884e7e9bb394060c86d49f6b8304b142ba656a5021

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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
819c9fbfb075d62a16393b9fe4fcbaa5

SHA1
8959169251e7394bcf4b9004326f83e266a06bfb

SHA256
50a0a04f2d67b4a26d3aaa163fa2fb0d80a5457716579587cc45ce5bc89d8fce

SHA512
1a2836932a771fac43e720d14d8df08c3e32ca5d6d335ae38788fa774e05568c6c05a7c5531ab745b8ec7a9d410f7460ea86c3f5fb6fc097a991170cf26feb57

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/tmp/moni.lod

Filesize
4B

MD5
87ec2f451208df97228105657edb717f

SHA1
3738f2650c3885bee794953d56a1e91a5516f93f

SHA256
eb57f949956cc9f3c32eb7f249bbe56a74c253015af4dddb0c98cde49157cbd0

SHA512
ed0b97c0e93e6fea48a3038fe6a19f5083f8e81575d5e27472e7f40d9cca795ef6ab7440acedb4a7837623e9ef21f635f782067d411ee428e7690d3ffe6644ea

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/tmp/notify.file

Filesize
37B

MD5
e4b78049268b74ae76f95ecb31c1913f

SHA1
8da5f3a5f9ef8b8ac7429da0a121d12741046e96

SHA256
8a272d64798779c386df1a27e95b53c9b6dc18d680419468c8f546d2a9f0ab02

SHA512
06b8de1feb47c27b0451c4e7a477216e873f5ec555da561d123864df26252dd771eb603966ed2741c169835b6bbb1df09fb4805b229c73630710f45d2de49f78

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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
27201c2352dc520fea6cd5d52680cb62

SHA1
7a8b40a3750419a2dfa0e86b9dc9f42cace11ebd

SHA256
913b27ed6c2bb0f654cfbc8d8dadbf3b187ca4916a56d6397808f1582b826ef4

SHA512
256688e4ed7aa985b5e868773add6bba2a09ec5cfa883a02287cbd5865b041bc2a984e1b3fd43f81148fb0a89144dc3cfa5969fc3b7da169d28085903586eb5a

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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