mrblack | 7a9138408d453e5ac46d2ef6c02e2dc8b7eff1510462cff9be8608b85d5e2929

Analysis

max time kernel
152s
max time network
159s
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, 00:13

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General

Target

3270f2db7ee82e4339dd6d8bf4ab4bb6
Size

1.2MB
MD5

3270f2db7ee82e4339dd6d8bf4ab4bb6
SHA1

c6b3c480e180530afbdd28df43c6c2a834ec8d15
SHA256

7a9138408d453e5ac46d2ef6c02e2dc8b7eff1510462cff9be8608b85d5e2929
SHA512

15230de760ae9a932a2b713a3ca9c96ee21ba550ecde8d239606adbe7df7e8d0e537531ef4182ff77fdcce4d7939a7079f46601aceafe83f65616c505af2131a
SSDEEP

24576:e845rlHu6gVJKG75oFpA0VWIX4G2y1q2rJp0:745wRVJKGtSA0VWIoVu9p0

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	1566	getty
/usr/bin/.sshd	1618	.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/lsof	cp
File opened for modification	/usr/bin/bsd-port/udevd.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/bsd-port/getty.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	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/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	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/cmdline	insmod
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/cmdline	insmod

Writes file to tmp directory 5 IoCs

Malware often drops required files in the /tmp directory.

description	ioc
File opened for modification	/tmp/notify.file
File opened for modification	/tmp/conf.n
File opened for modification	/tmp/moni.lod
File opened for modification	/tmp/bill.lock
File opened for modification	/tmp/gates.lod

/tmp/3270f2db7ee82e4339dd6d8bf4ab4bb6
/tmp/3270f2db7ee82e4339dd6d8bf4ab4bb6
1⤵
PID:1540

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc1.d/S97DbSecuritySpt"
1⤵
PID:1545
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc1.d/S97DbSecuritySpt
  2⤵
  PID:1546

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc2.d/S97DbSecuritySpt"
1⤵
PID:1547
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc2.d/S97DbSecuritySpt
  2⤵
  PID:1548

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc3.d/S97DbSecuritySpt"
1⤵
PID:1549
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc3.d/S97DbSecuritySpt
  2⤵
  PID:1550

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc4.d/S97DbSecuritySpt"
1⤵
PID:1551
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc4.d/S97DbSecuritySpt
  2⤵
  PID:1552

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc5.d/S97DbSecuritySpt"
1⤵
PID:1553
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc5.d/S97DbSecuritySpt
  2⤵
  PID:1554

/bin/sh
sh -c "mkdir -p /usr/bin/bsd-port"
1⤵
PID:1558
- /bin/mkdir
  mkdir -p /usr/bin/bsd-port
  2⤵
  - Reads runtime system information
  PID:1559

/bin/sh
sh -c "mkdir -p /usr/bin/bsd-port"
1⤵
PID:1560
- /bin/mkdir
  mkdir -p /usr/bin/bsd-port
  2⤵
  - Reads runtime system information
  PID:1561

/bin/sh
sh -c "cp -f /tmp/3270f2db7ee82e4339dd6d8bf4ab4bb6 /usr/bin/bsd-port/getty"
1⤵
PID:1562
- /bin/cp
  cp -f /tmp/3270f2db7ee82e4339dd6d8bf4ab4bb6 /usr/bin/bsd-port/getty
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1563

/bin/sh
sh -c /usr/bin/bsd-port/getty
1⤵
PID:1565
- /usr/bin/bsd-port/getty
  /usr/bin/bsd-port/getty
  2⤵
  - Executes dropped EXE
  PID:1566

/bin/sh
sh -c "mkdir -p /usr/bin"
1⤵
PID:1568
- /bin/mkdir
  mkdir -p /usr/bin
  2⤵
  - Reads runtime system information
  PID:1569

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

/bin/sh
sh -c "cp -f /tmp/3270f2db7ee82e4339dd6d8bf4ab4bb6 /usr/bin/.sshd"
1⤵
PID:1572
- /bin/cp
  cp -f /tmp/3270f2db7ee82e4339dd6d8bf4ab4bb6 /usr/bin/.sshd
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1573

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc1.d/S99selinux"
1⤵
PID:1574
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc1.d/S99selinux
  2⤵
  PID:1575

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc2.d/S99selinux"
1⤵
PID:1576
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc2.d/S99selinux
  2⤵
  PID:1577

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc3.d/S99selinux"
1⤵
PID:1578
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc3.d/S99selinux
  2⤵
  PID:1579

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc4.d/S99selinux"
1⤵
PID:1580
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc4.d/S99selinux
  2⤵
  PID:1581

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc5.d/S99selinux"
1⤵
PID:1582
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc5.d/S99selinux
  2⤵
  PID:1583

/bin/sh
sh -c "mkdir -p /usr/bin/dpkgd"
1⤵
PID:1584
- /bin/mkdir
  mkdir -p /usr/bin/dpkgd
  2⤵
  - Reads runtime system information
  PID:1585

/bin/sh
sh -c "cp -f /bin/ps /usr/bin/dpkgd/ps"
1⤵
PID:1586
- /bin/cp
  cp -f /bin/ps /usr/bin/dpkgd/ps
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1587

/bin/sh
sh -c "mkdir -p /bin"
1⤵
PID:1588
- /bin/mkdir
  mkdir -p /bin
  2⤵
  - Reads runtime system information
  PID:1589

/bin/sh
sh -c "mkdir -p /bin"
1⤵
PID:1590
- /bin/mkdir
  mkdir -p /bin
  2⤵
  - Reads runtime system information
  PID:1591

/bin/sh
sh -c "cp -f /usr/bin/bsd-port/getty /bin/ps"
1⤵
PID:1592
- /bin/cp
  cp -f /usr/bin/bsd-port/getty /bin/ps
  2⤵
  - Writes file to system bin folder
  - Reads runtime system information
  PID:1593

/bin/sh
sh -c "chmod 0755 /bin/ps"
1⤵
PID:1594
- /bin/chmod
  chmod 0755 /bin/ps
  2⤵
  PID:1595

/bin/sh
sh -c "cp -f /bin/ss /usr/bin/dpkgd/ss"
1⤵
PID:1596
- /bin/cp
  cp -f /bin/ss /usr/bin/dpkgd/ss
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1597

/bin/sh
sh -c "mkdir -p /bin"
1⤵
PID:1598
- /bin/mkdir
  mkdir -p /bin
  2⤵
  - Reads runtime system information
  PID:1599

/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 "cp -f /usr/bin/bsd-port/getty /bin/ss"
1⤵
PID:1602
- /bin/cp
  cp -f /usr/bin/bsd-port/getty /bin/ss
  2⤵
  - Writes file to system bin folder
  - Reads runtime system information
  PID:1603

/bin/sh
sh -c "chmod 0755 /bin/ss"
1⤵
PID:1604
- /bin/chmod
  chmod 0755 /bin/ss
  2⤵
  PID:1605

/bin/sh
sh -c "cp -f /usr/bin/lsof /usr/bin/dpkgd/lsof"
1⤵
PID:1606
- /bin/cp
  cp -f /usr/bin/lsof /usr/bin/dpkgd/lsof
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1607

/bin/sh
sh -c "mkdir -p /usr/bin"
1⤵
PID:1608
- /bin/mkdir
  mkdir -p /usr/bin
  2⤵
  - Reads runtime system information
  PID:1609

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

/bin/sh
sh -c "cp -f /usr/bin/bsd-port/getty /usr/bin/lsof"
1⤵
PID:1612
- /bin/cp
  cp -f /usr/bin/bsd-port/getty /usr/bin/lsof
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1613

/bin/sh
sh -c "chmod 0755 /usr/bin/lsof"
1⤵
PID:1614
- /bin/chmod
  chmod 0755 /usr/bin/lsof
  2⤵
  PID:1615

/bin/sh
sh -c /usr/bin/.sshd
1⤵
PID:1617
- /usr/bin/.sshd
  /usr/bin/.sshd
  2⤵
  - Executes dropped EXE
  PID:1618

/bin/sh
sh -c "insmod /usr/bin/bsd-port/xpacket.ko"
1⤵
PID:1621
- /sbin/insmod
  insmod /usr/bin/bsd-port/xpacket.ko
  2⤵
  - Reads runtime system information
  PID:1622

/bin/sh
sh -c "insmod /tmp/xpacket.ko"
1⤵
PID:1623
- /sbin/insmod
  insmod /tmp/xpacket.ko
  2⤵
  - Reads runtime system information
  PID:1624

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/selinux

Filesize
36B

MD5
993cc15058142d96c3daf7852c3d5ee8

SHA1
0950b8b391b04dd3895ea33cd3141543ebd2525d

SHA256
8171d077918611803d93088409f220c66fae1c670b297e1aa5d8cbd548ce9208

SHA512
0c4256c00a3710f97e92581b552682b36b62afc35fe72622c491323c618c19ea62611ac04ccafc3dfcde2254a2ebbd93b69b66795b16e36332293bed83adb928

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/tmp/gates.lod

Filesize
4B

MD5
1373b284bc381890049e92d324f56de0

SHA1
d05785002742a30502dde3731b28883334e46040

SHA256
477e2d13152129e72c4a47a5abed06ce422daff2ca0e99d33bc527477effee34

SHA512
b409dbef7cad909beab9e2b251590e7a6773e6ef7bc3782a9adb4be3a2765fdefca68cb96b9b31e92e0edb23d521aa3adfb7c90ade660e75b1a04832d19d59f4

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/tmp/moni.lod

Filesize
4B

MD5
d1dc3a8270a6f9394f88847d7f0050cf

SHA1
4144a50012a273c9a22b8e634d0ef46fa90835e4

SHA256
48af26beb80f0b14f33670336b3deb3b55b7d8f7eb33709596c6174394661034

SHA512
b53a5a9b2a570422785633952c81ba21a2d14323314576ae606c832865ff22e89dd2639c7cb3a836269d6aecebe56fc67a3867295c3af3c20cd003b2cdb5fc59

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/tmp/notify.file

Filesize
37B

MD5
12362f46e5ef5f9dcdb1cd1e45a5e01b

SHA1
c962d87f0813a69a6ffd2f224e89efcc39a61d40

SHA256
733b26b42b37314143b0763020e45b0530b4c59a78bb6a60c3115cfa0e27aa1a

SHA512
6aa867c2cf61c5e7282491d8bfc6d643a80a487421380be9f35b38206b5b5248dd47b5c6f90e70ce35572e7a091dd9af52acc6193cba5c91c69e1581497af305

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

Filesize
73B

MD5
9b11c537c3206f6c51c4d30e196a7e54

SHA1
270d0a8b5b13001fdb35858f560f3c1658b7c296

SHA256
7209c146eaccc47dc6ffc83a1f5cad4eb9a21a091d72b828cade47e602229338

SHA512
2a49ed2f3b8fccd4d7aa4d8719d1ce140ab407228184c515d2b8accf06389a78809df37a90c654a1df5fe3740e23e53f64a7da457e7e44bd4328132fd8694c72

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/usr/bin/bsd-port/getty

Filesize
1.2MB

MD5
3270f2db7ee82e4339dd6d8bf4ab4bb6

SHA1
c6b3c480e180530afbdd28df43c6c2a834ec8d15

SHA256
7a9138408d453e5ac46d2ef6c02e2dc8b7eff1510462cff9be8608b85d5e2929

SHA512
15230de760ae9a932a2b713a3ca9c96ee21ba550ecde8d239606adbe7df7e8d0e537531ef4182ff77fdcce4d7939a7079f46601aceafe83f65616c505af2131a

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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