mrblack | 230d9f6de7d3491a5ae9cd3e1453e2f3b7b96226b018bccbb3d33f3e17f109be

Analysis

max time kernel
153s
max time network
154s
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 07:31

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General

Target

798e701f432cd157befc956f7f506847
Size

1.2MB
MD5

798e701f432cd157befc956f7f506847
SHA1

49a5f60432f483bdf2f30e41137a160a47295b46
SHA256

230d9f6de7d3491a5ae9cd3e1453e2f3b7b96226b018bccbb3d33f3e17f109be
SHA512

958bc38049a1c2a0d3732380c7a0601a0c33f886b53a51f23df594c7fce69f18a2a1b119feff20e74e61b4a968e00427c443cd9456265b56e8cd0f2915852b52
SSDEEP

24576:e845rlHu6gVJKG75oFpA0VWKX4G2y1q2rJp0:745wRVJKGtSA0VWKoVu9p0

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 2 IoCs

resource	yara_rule
behavioral1/files/fstream-4.dat	family_mrblack
behavioral1/files/fstream-6.dat	family_mrblack

Executes dropped EXE 2 IoCs

ioc	pid	Process
/usr/bin/bsd-port/getty	1555	getty
/etc/.ssh	1579	.ssh

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/bsd-port/getty	cp
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/conf.n	Process not Found
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/arp
File opened for reading	/proc/net/dev
File opened for reading	/proc/net/route

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

/tmp/798e701f432cd157befc956f7f506847
/tmp/798e701f432cd157befc956f7f506847
1⤵
PID:1531

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc1.d/S97DbSecuritySpt"
1⤵
PID:1537
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc1.d/S97DbSecuritySpt
  2⤵
  PID:1538

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc2.d/S97DbSecuritySpt"
1⤵
PID:1539
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc2.d/S97DbSecuritySpt
  2⤵
  PID:1540

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc3.d/S97DbSecuritySpt"
1⤵
PID:1541
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc3.d/S97DbSecuritySpt
  2⤵
  PID:1542

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc4.d/S97DbSecuritySpt"
1⤵
PID:1543
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc4.d/S97DbSecuritySpt
  2⤵
  PID:1544

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc5.d/S97DbSecuritySpt"
1⤵
PID:1545
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc5.d/S97DbSecuritySpt
  2⤵
  PID:1546

/bin/sh
sh -c "mkdir -p /usr/bin/bsd-port"
1⤵
PID:1547
- /bin/mkdir
  mkdir -p /usr/bin/bsd-port
  2⤵
  - Reads runtime system information
  PID:1548

/bin/sh
sh -c "mkdir -p /usr/bin/bsd-port"
1⤵
PID:1549
- /bin/mkdir
  mkdir -p /usr/bin/bsd-port
  2⤵
  - Reads runtime system information
  PID:1550

/bin/sh
sh -c "cp -f /tmp/798e701f432cd157befc956f7f506847 /usr/bin/bsd-port/getty"
1⤵
PID:1551
- /bin/cp
  cp -f /tmp/798e701f432cd157befc956f7f506847 /usr/bin/bsd-port/getty
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1552

/bin/sh
sh -c /usr/bin/bsd-port/getty
1⤵
PID:1554
- /usr/bin/bsd-port/getty
  /usr/bin/bsd-port/getty
  2⤵
  - Executes dropped EXE
  PID:1555

/bin/sh
sh -c "mkdir -p /etc"
1⤵
PID:1557
- /bin/mkdir
  mkdir -p /etc
  2⤵
  - Reads runtime system information
  PID:1558

/bin/sh
sh -c "mkdir -p /etc"
1⤵
PID:1559
- /bin/mkdir
  mkdir -p /etc
  2⤵
  - Reads runtime system information
  PID:1560

/bin/sh
sh -c "cp -f /tmp/798e701f432cd157befc956f7f506847 /etc/.ssh"
1⤵
PID:1561
- /bin/cp
  cp -f /tmp/798e701f432cd157befc956f7f506847 /etc/.ssh
  2⤵
  - Reads runtime system information
  PID:1562

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc1.d/S99selinux"
1⤵
PID:1563
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc1.d/S99selinux
  2⤵
  PID:1564

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc2.d/S99selinux"
1⤵
PID:1565
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc2.d/S99selinux
  2⤵
  PID:1566

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc3.d/S99selinux"
1⤵
PID:1567
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc3.d/S99selinux
  2⤵
  PID:1568

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc4.d/S99selinux"
1⤵
PID:1569
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc4.d/S99selinux
  2⤵
  PID:1570

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc5.d/S99selinux"
1⤵
PID:1571
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc5.d/S99selinux
  2⤵
  PID:1572

/bin/sh
sh -c "mkdir -p /usr/bin/dpkgd"
1⤵
PID:1573
- /bin/mkdir
  mkdir -p /usr/bin/dpkgd
  2⤵
  - Reads runtime system information
  PID:1574

/bin/sh
sh -c "cp -f /bin/ps /usr/bin/dpkgd/ps"
1⤵
PID:1575
- /bin/cp
  cp -f /bin/ps /usr/bin/dpkgd/ps
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1576

/bin/sh
sh -c /etc/.ssh
1⤵
PID:1578
- /etc/.ssh
  /etc/.ssh
  2⤵
  - Executes dropped EXE
  PID:1579

/bin/sh
sh -c "mkdir -p /bin"
1⤵
PID:1580
- /bin/mkdir
  mkdir -p /bin
  2⤵
  - Reads runtime system information
  PID:1581

/bin/sh
sh -c "mkdir -p /bin"
1⤵
PID:1582
- /bin/mkdir
  mkdir -p /bin
  2⤵
  - Reads runtime system information
  PID:1583

/bin/sh
sh -c "cp -f /usr/bin/bsd-port/getty /bin/ps"
1⤵
PID:1584
- /bin/cp
  cp -f /usr/bin/bsd-port/getty /bin/ps
  2⤵
  - Writes file to system bin folder
  - Reads runtime system information
  PID:1585

/bin/sh
sh -c "chmod 0755 /bin/ps"
1⤵
PID:1586
- /bin/chmod
  chmod 0755 /bin/ps
  2⤵
  PID:1587

/bin/sh
sh -c "cp -f /bin/ss /usr/bin/dpkgd/ss"
1⤵
PID:1588
- /bin/cp
  cp -f /bin/ss /usr/bin/dpkgd/ss
  2⤵
  - Write file to user bin folder
  - 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 "mkdir -p /bin"
1⤵
PID:1592
- /bin/mkdir
  mkdir -p /bin
  2⤵
  - Reads runtime system information
  PID:1593

/bin/sh
sh -c "cp -f /usr/bin/bsd-port/getty /bin/ss"
1⤵
PID:1594
- /bin/cp
  cp -f /usr/bin/bsd-port/getty /bin/ss
  2⤵
  - Writes file to system bin folder
  - Reads runtime system information
  PID:1595

/bin/sh
sh -c "chmod 0755 /bin/ss"
1⤵
PID:1596
- /bin/chmod
  chmod 0755 /bin/ss
  2⤵
  PID:1597

/bin/sh
sh -c "cp -f /usr/bin/lsof /usr/bin/dpkgd/lsof"
1⤵
PID:1598
- /bin/cp
  cp -f /usr/bin/lsof /usr/bin/dpkgd/lsof
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1599

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

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

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

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

/bin/sh
sh -c "insmod /usr/bin/bsd-port/xpacket.ko"
1⤵
PID:1610
- /sbin/insmod
  insmod /usr/bin/bsd-port/xpacket.ko
  2⤵
  - Reads runtime system information
  PID:1611

/bin/sh
sh -c "insmod /tmp/xpacket.ko"
1⤵
PID:1613
- /sbin/insmod
  insmod /tmp/xpacket.ko
  2⤵
  - Reads runtime system information
  PID:1615

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/.ssh

Filesize
1.2MB

MD5
798e701f432cd157befc956f7f506847

SHA1
49a5f60432f483bdf2f30e41137a160a47295b46

SHA256
230d9f6de7d3491a5ae9cd3e1453e2f3b7b96226b018bccbb3d33f3e17f109be

SHA512
958bc38049a1c2a0d3732380c7a0601a0c33f886b53a51f23df594c7fce69f18a2a1b119feff20e74e61b4a968e00427c443cd9456265b56e8cd0f2915852b52

Download Submit
/etc/init.d/selinux

Filesize
36B

MD5
993cc15058142d96c3daf7852c3d5ee8

SHA1
0950b8b391b04dd3895ea33cd3141543ebd2525d

SHA256
8171d077918611803d93088409f220c66fae1c670b297e1aa5d8cbd548ce9208

SHA512
0c4256c00a3710f97e92581b552682b36b62afc35fe72622c491323c618c19ea62611ac04ccafc3dfcde2254a2ebbd93b69b66795b16e36332293bed83adb928

Download Submit
/tmp/moni.lod

Filesize
4B

MD5
faafda66202d234463057972460c04f5

SHA1
b08fff87998d20605f134b632cb8fa3398008116

SHA256
b2382de3cdaaf0c8e505cd370821d7842e493a1e64160dc6991b1109e2938a21

SHA512
2c743b3f56b8ed3295341971cce16d94043522e565ce09214fe8d21ef68d5a1dd355fe97da6770bd856c3241f4d7ced45a17962bda8cf542c0d1f4c17f6fbd7b

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/tmp/notify.file

Filesize
37B

MD5
b06d55becf92d3276f4cdbde7cba5da3

SHA1
7ee93ad74dc59e4b3d095ef9926ec80ea54cbc1b

SHA256
14387da01fd1b780381df91a2008c38b9a3c04e4c7c0f1b6cd5c9c8daa600f60

SHA512
aa140a9540eb633cbf9e142921c4f4dcb536a5caebc0b697d604a3b10998d6b78377d6a0b2455b0e77e2f9f8a8fa62538d466ec725e39b808f1a994234a02143

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

Filesize
73B

MD5
836af8986d06e167cd90af9d2e98dad6

SHA1
932a6cc8d251cdeba5f3f3d0f45484308a9791b7

SHA256
f14aa856c66d826a864da9f7555c4bd04035c7b5e92e1aee18e0b9ae394eff42

SHA512
49db3e9342f4ecbefb2be70e186c9d3ae33b01a6917df3490b6a42ff84680a455e374091f5c2eb771e8153f359fbb6976f7a563b5c3a0c0155469dc44d3a8ded

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/usr/bin/bsd-port/getty

Filesize
1.1MB

MD5
96e055f072edda27245218c27b54fd02

SHA1
47bab642265e9f8b3e9c53aec6fadd95d0b13ea9

SHA256
746e86cb9df1fd85e0017d7034d10547fb98df966b36bcbf7790ab19cf5f9eb6

SHA512
d70c2eef2ec330f7106defdbb0838d145f68f11c5e43ff207b6fa6fafd8b98740e186ed5c7a097da457cb42916b92bb08c8770de058e50ec0cb3878466673591

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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

Download Submit
/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