mrblack | 01f5c4962d10c5b6fe4acb3afadb435cd055cfaf5b6691ee812f230a30609a24

Analysis

max time kernel
153s
max time network
152s
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 00:46

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General

Target

3bb30848e0c3e3f1e505fc6e2e0a3aa5
Size

1.2MB
MD5

3bb30848e0c3e3f1e505fc6e2e0a3aa5
SHA1

63adb6885882ac443bb65d6346e68c29a69f633d
SHA256

01f5c4962d10c5b6fe4acb3afadb435cd055cfaf5b6691ee812f230a30609a24
SHA512

0f3ebed6a6e6d81c08e81a5fba644ba0590d55f9bc06bc093cc38eeed4a05ddd70e3c11691d3f0654560e72a4b03ff44903de17c8554715cb37b1576b566b5aa
SSDEEP

24576:e845rlHu6gVJKG75oFpA0VW3X4G2y1q2rJp0:745wRVJKGtSA0VW3oVu9p0

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	1547	getty
/usr/bin/.sshd	1599	.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/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/dpkgd/ps	cp
File opened for modification	/usr/bin/dpkgd/ss	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/dpkgd/lsof	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	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	cp
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	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	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/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/conf.n
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

/tmp/3bb30848e0c3e3f1e505fc6e2e0a3aa5
/tmp/3bb30848e0c3e3f1e505fc6e2e0a3aa5
1⤵
PID:1523

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc1.d/S97DbSecuritySpt"
1⤵
PID:1529
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc1.d/S97DbSecuritySpt
  2⤵
  PID:1530

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc2.d/S97DbSecuritySpt"
1⤵
PID:1531
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc2.d/S97DbSecuritySpt
  2⤵
  PID:1532

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc3.d/S97DbSecuritySpt"
1⤵
PID:1533
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc3.d/S97DbSecuritySpt
  2⤵
  PID:1534

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc4.d/S97DbSecuritySpt"
1⤵
PID:1535
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc4.d/S97DbSecuritySpt
  2⤵
  PID:1536

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc5.d/S97DbSecuritySpt"
1⤵
PID:1537
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc5.d/S97DbSecuritySpt
  2⤵
  PID:1538

/bin/sh
sh -c "mkdir -p /usr/bin/bsd-port"
1⤵
PID:1539
- /bin/mkdir
  mkdir -p /usr/bin/bsd-port
  2⤵
  - Reads runtime system information
  PID:1540

/bin/sh
sh -c "mkdir -p /usr/bin/bsd-port"
1⤵
PID:1541
- /bin/mkdir
  mkdir -p /usr/bin/bsd-port
  2⤵
  - Reads runtime system information
  PID:1542

/bin/sh
sh -c "cp -f /tmp/3bb30848e0c3e3f1e505fc6e2e0a3aa5 /usr/bin/bsd-port/getty"
1⤵
PID:1543
- /bin/cp
  cp -f /tmp/3bb30848e0c3e3f1e505fc6e2e0a3aa5 /usr/bin/bsd-port/getty
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1544

/bin/sh
sh -c /usr/bin/bsd-port/getty
1⤵
PID:1546
- /usr/bin/bsd-port/getty
  /usr/bin/bsd-port/getty
  2⤵
  - Executes dropped EXE
  PID:1547

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

/bin/sh
sh -c "mkdir -p /usr/bin"
1⤵
PID:1551
- /bin/mkdir
  mkdir -p /usr/bin
  2⤵
  - Reads runtime system information
  PID:1552

/bin/sh
sh -c "cp -f /tmp/3bb30848e0c3e3f1e505fc6e2e0a3aa5 /usr/bin/.sshd"
1⤵
PID:1553
- /bin/cp
  cp -f /tmp/3bb30848e0c3e3f1e505fc6e2e0a3aa5 /usr/bin/.sshd
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1554

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc1.d/S99selinux"
1⤵
PID:1555
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc1.d/S99selinux
  2⤵
  PID:1556

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc2.d/S99selinux"
1⤵
PID:1557
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc2.d/S99selinux
  2⤵
  PID:1558

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc3.d/S99selinux"
1⤵
PID:1559
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc3.d/S99selinux
  2⤵
  PID:1560

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc4.d/S99selinux"
1⤵
PID:1561
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc4.d/S99selinux
  2⤵
  PID:1562

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc5.d/S99selinux"
1⤵
PID:1563
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc5.d/S99selinux
  2⤵
  PID:1564

/bin/sh
sh -c "mkdir -p /usr/bin/dpkgd"
1⤵
PID:1565
- /bin/mkdir
  mkdir -p /usr/bin/dpkgd
  2⤵
  - Reads runtime system information
  PID:1566

/bin/sh
sh -c "cp -f /bin/ps /usr/bin/dpkgd/ps"
1⤵
PID:1567
- /bin/cp
  cp -f /bin/ps /usr/bin/dpkgd/ps
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1568

/bin/sh
sh -c "mkdir -p /bin"
1⤵
PID:1569
- /bin/mkdir
  mkdir -p /bin
  2⤵
  - Reads runtime system information
  PID:1570

/bin/sh
sh -c "mkdir -p /bin"
1⤵
PID:1571
- /bin/mkdir
  mkdir -p /bin
  2⤵
  - Reads runtime system information
  PID:1572

/bin/sh
sh -c "cp -f /usr/bin/bsd-port/getty /bin/ps"
1⤵
PID:1573
- /bin/cp
  cp -f /usr/bin/bsd-port/getty /bin/ps
  2⤵
  - Writes file to system bin folder
  - Reads runtime system information
  PID:1574

/bin/sh
sh -c "chmod 0755 /bin/ps"
1⤵
PID:1575
- /bin/chmod
  chmod 0755 /bin/ps
  2⤵
  PID:1576

/bin/sh
sh -c "cp -f /bin/ss /usr/bin/dpkgd/ss"
1⤵
PID:1577
- /bin/cp
  cp -f /bin/ss /usr/bin/dpkgd/ss
  2⤵
  - Write file to user bin folder
  - 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 "mkdir -p /bin"
1⤵
PID:1581
- /bin/mkdir
  mkdir -p /bin
  2⤵
  - Reads runtime system information
  PID:1582

/bin/sh
sh -c "cp -f /usr/bin/bsd-port/getty /bin/ss"
1⤵
PID:1583
- /bin/cp
  cp -f /usr/bin/bsd-port/getty /bin/ss
  2⤵
  - Writes file to system bin folder
  - Reads runtime system information
  PID:1584

/bin/sh
sh -c "chmod 0755 /bin/ss"
1⤵
PID:1585
- /bin/chmod
  chmod 0755 /bin/ss
  2⤵
  PID:1586

/bin/sh
sh -c "cp -f /usr/bin/lsof /usr/bin/dpkgd/lsof"
1⤵
PID:1587
- /bin/cp
  cp -f /usr/bin/lsof /usr/bin/dpkgd/lsof
  2⤵
  - Write file to user bin folder
  - 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 "mkdir -p /usr/bin"
1⤵
PID:1591
- /bin/mkdir
  mkdir -p /usr/bin
  2⤵
  - Reads runtime system information
  PID:1592

/bin/sh
sh -c "cp -f /usr/bin/bsd-port/getty /usr/bin/lsof"
1⤵
PID:1593
- /bin/cp
  cp -f /usr/bin/bsd-port/getty /usr/bin/lsof
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1594

/bin/sh
sh -c "chmod 0755 /usr/bin/lsof"
1⤵
PID:1595
- /bin/chmod
  chmod 0755 /usr/bin/lsof
  2⤵
  PID:1596

/bin/sh
sh -c /usr/bin/.sshd
1⤵
PID:1598
- /usr/bin/.sshd
  /usr/bin/.sshd
  2⤵
  - Executes dropped EXE
  PID:1599

/bin/sh
sh -c "insmod /usr/bin/bsd-port/xpacket.ko"
1⤵
PID:1602
- /sbin/insmod
  insmod /usr/bin/bsd-port/xpacket.ko
  2⤵
  - Reads runtime system information
  PID:1603

/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
50B

MD5
cd7ad53eb56cd003574181ab05435148

SHA1
3aa5da948af1750c0827963f2012c73bd6a62532

SHA256
9937ae777017e20be754f5094c70735318286a94e4c91131f72f372776d90c6e

SHA512
d307e61915aa2da536e956b156ac0190bcba4eb30e4415ee3a514aae6d70fc7ad9aad5ca939f18c295532c52a1230038c206fcfc35b7aec6f2fd5288911fab57

Download Submit
/tmp/gates.lod

Filesize
4B

MD5
471c75ee6643a10934502bdafee198fb

SHA1
4458c79edc062c4d846a5bc0617561909ea8d106

SHA256
bce35ce6291ba5b8fb5fea32ec1aaed5556f355746882a9dd183857cb0e25967

SHA512
cf89f713e07f6b536d0920016da31f23e2551ad69758934ef68f9770ea0b5395afbba5f20a54a04c9b625bb61936e07bb0b5eeedf0378980ac0814e9b28f018c

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/tmp/moni.lod

Filesize
4B

MD5
9e984c108157cea74c894b5cf34efc44

SHA1
0c774d8e1e30b273143a93836f845a4d3f44a60f

SHA256
b458944d9ec4322f9ff0de2885ce82d580341fcf0fd688422e9929b6e7ce3b2d

SHA512
aeb9c3cdd81ee2439338d9c994a1150abf17fedc07542fb625f0dc70cf5d160e5b9827cbc875552d7bdc14d9372ee6b2525ac8e80d0f4a0fa88fcb86b79bd2fc

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/tmp/notify.file

Filesize
37B

MD5
85cbed9bb76b0253088c99dcbffe8c4b

SHA1
f006264b48da1053a769e29f1f9135ba2cfa56fc

SHA256
2304e46cc8e3ccf75dcdf89f9559f208caf48210e0f9056af828bfad14e4a73f

SHA512
da790832a9bbfe4696089464edcc51e2b0ce9ce3671dd8189ca51c4cdcc7aedfd0d34429fb13946e9bf9905ba9a2991cd6f67196bc0d5195a17f985f39baa569

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

Filesize
73B

MD5
dee75bf6cf6e768bea9d5a94b34b7e54

SHA1
ded62c82df43661b853cc8b9c285b87dac77c8f8

SHA256
09650e2ce4431ebc6b0c70037ba3992d26552f0623a95531fe886359f4a4e119

SHA512
aa67c5d379621737b576deb0adb4322e6ee97f7d39394a73162e7d4df6e5c488b92bca4121a15c2e417ad373944251050407aead4f1cc1c66efc6881841b279a

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/usr/bin/bsd-port/getty

Filesize
1.2MB

MD5
3bb30848e0c3e3f1e505fc6e2e0a3aa5

SHA1
63adb6885882ac443bb65d6346e68c29a69f633d

SHA256
01f5c4962d10c5b6fe4acb3afadb435cd055cfaf5b6691ee812f230a30609a24

SHA512
0f3ebed6a6e6d81c08e81a5fba644ba0590d55f9bc06bc093cc38eeed4a05ddd70e3c11691d3f0654560e72a4b03ff44903de17c8554715cb37b1576b566b5aa

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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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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads