mrblack | fab8944e3f0541c0ff149306ea74137f7c1e9c081670906844769a45aa7171b4

Analysis

max time kernel
149s
max time network
153s
platform
ubuntu-20.04_amd64
resource
ubuntu2004-amd64-20240221-en
resource tags

arch:amd64arch:i386image:ubuntu2004-amd64-20240221-enkernel:5.4.0-169-genericlocale:en-usos:ubuntu-20.04-amd64system
submitted
22-03-2024 08:43

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General

Target

9c65f61859b4b8ae00c79ddd63abf60d
Size

1.2MB
MD5

9c65f61859b4b8ae00c79ddd63abf60d
SHA1

ddf2c1d0abdef832ec746004dcdfd0cd800048ae
SHA256

fab8944e3f0541c0ff149306ea74137f7c1e9c081670906844769a45aa7171b4
SHA512

ed39ef838a9cdff65e891f65a98800ebd282645e13d9f83a6b620e3bc573a3fae8e5f312136b970977a4cdbdf5a0e600be401cf425a2d673d30c715562ab163e
SSDEEP

24576:e845rGHu6gVJKG75oFpA0VWeX4a2y1q2rJp0:745vRVJKGtSA0VWeoZu9p0

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	1767	getty
/usr/bin/.sshd	1948	.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/selinux
File opened for modification	/etc/init.d/DbSecuritySpt

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 11 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/.sshd	cp
File opened for modification	/usr/bin/dpkgd/lsof	cp
File opened for modification	/usr/bin/dpkgd/ss	cp
File opened for modification	/usr/bin/ps	cp
File opened for modification	/usr/bin/ss	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/getty	cp
File opened for modification	/usr/bin/dpkgd/ps	cp
File opened for modification	/usr/bin/lsof	cp

Writes file to system bin folder 1 TTPs 3 IoCs

Hijack Execution Flow

T1574

description	ioc	Process
File opened for modification	/bin/lsof	cp
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 35 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/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/sys/kernel/version	getty
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/sys/kernel/version	9c65f61859b4b8ae00c79ddd63abf60d
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/meminfo	Process not Found
File opened for reading	/proc/cmdline	insmod
File opened for reading	/proc/sys/kernel/version	.sshd
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	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/stat	Process not Found

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/9c65f61859b4b8ae00c79ddd63abf60d
/tmp/9c65f61859b4b8ae00c79ddd63abf60d
1⤵
- Reads runtime system information
PID:1470

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc1.d/S97DbSecuritySpt"
1⤵
PID:1749
- /usr/bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc1.d/S97DbSecuritySpt
  2⤵
  PID:1750

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc2.d/S97DbSecuritySpt"
1⤵
PID:1751
- /usr/bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc2.d/S97DbSecuritySpt
  2⤵
  PID:1752

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc3.d/S97DbSecuritySpt"
1⤵
PID:1753
- /usr/bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc3.d/S97DbSecuritySpt
  2⤵
  PID:1754

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc4.d/S97DbSecuritySpt"
1⤵
PID:1755
- /usr/bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc4.d/S97DbSecuritySpt
  2⤵
  PID:1756

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc5.d/S97DbSecuritySpt"
1⤵
PID:1757
- /usr/bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc5.d/S97DbSecuritySpt
  2⤵
  PID:1758

/bin/sh
sh -c "mkdir -p /usr/bin/bsd-port"
1⤵
PID:1759
- /usr/bin/mkdir
  mkdir -p /usr/bin/bsd-port
  2⤵
  - Reads runtime system information
  PID:1760

/bin/sh
sh -c "mkdir -p /usr/bin/bsd-port"
1⤵
PID:1761
- /usr/bin/mkdir
  mkdir -p /usr/bin/bsd-port
  2⤵
  - Reads runtime system information
  PID:1762

/bin/sh
sh -c "cp -f /tmp/9c65f61859b4b8ae00c79ddd63abf60d /usr/bin/bsd-port/getty"
1⤵
PID:1763
- /usr/bin/cp
  cp -f /tmp/9c65f61859b4b8ae00c79ddd63abf60d /usr/bin/bsd-port/getty
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1764

/bin/sh
sh -c /usr/bin/bsd-port/getty
1⤵
PID:1766
- /usr/bin/bsd-port/getty
  /usr/bin/bsd-port/getty
  2⤵
  - Executes dropped EXE
  - Reads runtime system information
  PID:1767

/bin/sh
sh -c "mkdir -p /usr/bin"
1⤵
PID:1794
- /usr/bin/mkdir
  mkdir -p /usr/bin
  2⤵
  - Reads runtime system information
  PID:1795

/bin/sh
sh -c "mkdir -p /usr/bin"
1⤵
PID:1796
- /usr/bin/mkdir
  mkdir -p /usr/bin
  2⤵
  - Reads runtime system information
  PID:1797

/bin/sh
sh -c "cp -f /tmp/9c65f61859b4b8ae00c79ddd63abf60d /usr/bin/.sshd"
1⤵
PID:1798
- /usr/bin/cp
  cp -f /tmp/9c65f61859b4b8ae00c79ddd63abf60d /usr/bin/.sshd
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1799

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc1.d/S99selinux"
1⤵
PID:1940
- /usr/bin/ln
  ln -s /etc/init.d/selinux /etc/rc1.d/S99selinux
  2⤵
  PID:1941

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc2.d/S99selinux"
1⤵
PID:1942
- /usr/bin/ln
  ln -s /etc/init.d/selinux /etc/rc2.d/S99selinux
  2⤵
  PID:1943

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc3.d/S99selinux"
1⤵
PID:1944
- /usr/bin/ln
  ln -s /etc/init.d/selinux /etc/rc3.d/S99selinux
  2⤵
  PID:1945

/bin/sh
sh -c /usr/bin/.sshd
1⤵
PID:1947
- /usr/bin/.sshd
  /usr/bin/.sshd
  2⤵
  - Executes dropped EXE
  - Reads runtime system information
  PID:1948

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc4.d/S99selinux"
1⤵
PID:1949
- /usr/bin/ln
  ln -s /etc/init.d/selinux /etc/rc4.d/S99selinux
  2⤵
  PID:1950

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc5.d/S99selinux"
1⤵
PID:1951
- /usr/bin/ln
  ln -s /etc/init.d/selinux /etc/rc5.d/S99selinux
  2⤵
  PID:1952

/bin/sh
sh -c "mkdir -p /usr/bin/dpkgd"
1⤵
PID:1953
- /usr/bin/mkdir
  mkdir -p /usr/bin/dpkgd
  2⤵
  - Reads runtime system information
  PID:1954

/bin/sh
sh -c "cp -f /bin/lsof /usr/bin/dpkgd/lsof"
1⤵
PID:1955
- /usr/bin/cp
  cp -f /bin/lsof /usr/bin/dpkgd/lsof
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1956

/bin/sh
sh -c "mkdir -p /bin"
1⤵
PID:1957
- /usr/bin/mkdir
  mkdir -p /bin
  2⤵
  - Reads runtime system information
  PID:1958

/bin/sh
sh -c "mkdir -p /bin"
1⤵
PID:1959
- /usr/bin/mkdir
  mkdir -p /bin
  2⤵
  - Reads runtime system information
  PID:1960

/bin/sh
sh -c "cp -f /usr/bin/bsd-port/getty /bin/lsof"
1⤵
PID:1961
- /usr/bin/cp
  cp -f /usr/bin/bsd-port/getty /bin/lsof
  2⤵
  - Writes file to system bin folder
  - Reads runtime system information
  PID:1962

/bin/sh
sh -c "chmod 0755 /bin/lsof"
1⤵
PID:1963
- /usr/bin/chmod
  chmod 0755 /bin/lsof
  2⤵
  PID:1964

/bin/sh
sh -c "cp -f /bin/ps /usr/bin/dpkgd/ps"
1⤵
PID:1965
- /usr/bin/cp
  cp -f /bin/ps /usr/bin/dpkgd/ps
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1966

/bin/sh
sh -c "mkdir -p /bin"
1⤵
PID:1967
- /usr/bin/mkdir
  mkdir -p /bin
  2⤵
  - Reads runtime system information
  PID:1968

/bin/sh
sh -c "mkdir -p /bin"
1⤵
PID:1969
- /usr/bin/mkdir
  mkdir -p /bin
  2⤵
  - Reads runtime system information
  PID:1970

/bin/sh
sh -c "cp -f /usr/bin/bsd-port/getty /bin/ps"
1⤵
PID:1971
- /usr/bin/cp
  cp -f /usr/bin/bsd-port/getty /bin/ps
  2⤵
  - Writes file to system bin folder
  - Reads runtime system information
  PID:1972

/bin/sh
sh -c "chmod 0755 /bin/ps"
1⤵
PID:1973
- /usr/bin/chmod
  chmod 0755 /bin/ps
  2⤵
  PID:1974

/bin/sh
sh -c "cp -f /bin/ss /usr/bin/dpkgd/ss"
1⤵
PID:1975
- /usr/bin/cp
  cp -f /bin/ss /usr/bin/dpkgd/ss
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1976

/bin/sh
sh -c "mkdir -p /bin"
1⤵
PID:1977
- /usr/bin/mkdir
  mkdir -p /bin
  2⤵
  - Reads runtime system information
  PID:1978

/bin/sh
sh -c "mkdir -p /bin"
1⤵
PID:1979
- /usr/bin/mkdir
  mkdir -p /bin
  2⤵
  - Reads runtime system information
  PID:1980

/bin/sh
sh -c "cp -f /usr/bin/bsd-port/getty /bin/ss"
1⤵
PID:1981
- /usr/bin/cp
  cp -f /usr/bin/bsd-port/getty /bin/ss
  2⤵
  - Writes file to system bin folder
  - Reads runtime system information
  PID:1982

/bin/sh
sh -c "chmod 0755 /bin/ss"
1⤵
PID:1983
- /usr/bin/chmod
  chmod 0755 /bin/ss
  2⤵
  PID:1984

/bin/sh
sh -c "mkdir -p /usr/bin"
1⤵
PID:1985
- /usr/bin/mkdir
  mkdir -p /usr/bin
  2⤵
  - Reads runtime system information
  PID:1986

/bin/sh
sh -c "mkdir -p /usr/bin"
1⤵
PID:1987
- /usr/bin/mkdir
  mkdir -p /usr/bin
  2⤵
  - Reads runtime system information
  PID:1988

/bin/sh
sh -c "cp -f /usr/bin/bsd-port/getty /usr/bin/lsof"
1⤵
PID:1989
- /usr/bin/cp
  cp -f /usr/bin/bsd-port/getty /usr/bin/lsof
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1990

/bin/sh
sh -c "chmod 0755 /usr/bin/lsof"
1⤵
PID:1991
- /usr/bin/chmod
  chmod 0755 /usr/bin/lsof
  2⤵
  PID:1992

/bin/sh
sh -c "mkdir -p /usr/bin"
1⤵
PID:1993
- /usr/bin/mkdir
  mkdir -p /usr/bin
  2⤵
  - Reads runtime system information
  PID:1994

/bin/sh
sh -c "mkdir -p /usr/bin"
1⤵
PID:1995
- /usr/bin/mkdir
  mkdir -p /usr/bin
  2⤵
  - Reads runtime system information
  PID:1996

/bin/sh
sh -c "cp -f /usr/bin/bsd-port/getty /usr/bin/ps"
1⤵
PID:1997
- /usr/bin/cp
  cp -f /usr/bin/bsd-port/getty /usr/bin/ps
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1998

/bin/sh
sh -c "chmod 0755 /usr/bin/ps"
1⤵
PID:1999
- /usr/bin/chmod
  chmod 0755 /usr/bin/ps
  2⤵
  PID:2000

/bin/sh
sh -c "mkdir -p /usr/bin"
1⤵
PID:2001
- /usr/bin/mkdir
  mkdir -p /usr/bin
  2⤵
  - Reads runtime system information
  PID:2002

/bin/sh
sh -c "mkdir -p /usr/bin"
1⤵
PID:2003
- /usr/bin/mkdir
  mkdir -p /usr/bin
  2⤵
  - Reads runtime system information
  PID:2004

/bin/sh
sh -c "cp -f /usr/bin/bsd-port/getty /usr/bin/ss"
1⤵
PID:2005
- /usr/bin/cp
  cp -f /usr/bin/bsd-port/getty /usr/bin/ss
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:2006

/bin/sh
sh -c "chmod 0755 /usr/bin/ss"
1⤵
PID:2007
- /usr/bin/chmod
  chmod 0755 /usr/bin/ss
  2⤵
  PID:2008

/bin/sh
sh -c "insmod /usr/bin/bsd-port/xpacket.ko"
1⤵
PID:2011
- /usr/sbin/insmod
  insmod /usr/bin/bsd-port/xpacket.ko
  2⤵
  - Reads runtime system information
  PID:2014

/bin/sh
sh -c "insmod /tmp/xpacket.ko"
1⤵
PID:2024
- /usr/sbin/insmod
  insmod /tmp/xpacket.ko
  2⤵
  - Reads runtime system information
  PID:2025

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

Replay Monitor

Loading Replay Monitor...

Downloads

/etc/init.d/DbSecuritySpt

Filesize
50B

MD5
e48e1b5a1cb84f1fda027a0cc169e9f3

SHA1
3cef04822ae494e7ee820a41c0793fb585fa8b34

SHA256
5a156112c879843ca3ab138ff3b10fc0e66f18198fa6a3cdb508e0381cb5115a

SHA512
9327f616960c2c2a0c3c7e1324119b8dfe79eaf5f92a1dcee45a4dc8eaf90ee4ef1695a50985a3dcef6519392c25b6e1e6b058b6ee7dd8bd593549c77329a616

Download Submit
/etc/init.d/selinux

Filesize
36B

MD5
993cc15058142d96c3daf7852c3d5ee8

SHA1
0950b8b391b04dd3895ea33cd3141543ebd2525d

SHA256
8171d077918611803d93088409f220c66fae1c670b297e1aa5d8cbd548ce9208

SHA512
0c4256c00a3710f97e92581b552682b36b62afc35fe72622c491323c618c19ea62611ac04ccafc3dfcde2254a2ebbd93b69b66795b16e36332293bed83adb928

Download Submit
/tmp/gates.lod

Filesize
4B

MD5
dc09c97fd73d7a324bdbfe7c79525f64

SHA1
c1183f16ab610230ebe8a9bcb331d2d6f7ebbf66

SHA256
8c40a6d264e529987be355b303cb08181b8595753e3ef3c8f4bdc29859ac5605

SHA512
dc202510bf97bb4c8c35628c00c9561a94f49c20894426e0c2828dfa8723444cbc364b8721edd3fb6f988515680ff96962633bbac9e25631865b68e3e7375f19

Download Submit
/tmp/moni.lod

Filesize
4B

MD5
f1981e4bd8a0d6d8462016d2fc6276b3

SHA1
7263d678abae47b211a7de6693c9df3ca96d228c

SHA256
f37f3f2b0dc57a86dee4ba6ff855283bb4d2f0dea1c5bd1b708853444c2ffcec

SHA512
7f856029c0a006af896a52d86071d47f6b0c60933554fd16c4a837d8216f6a1875b69b1c2972f15d59bf517c390f13547da02868d29e0f913c76de86bb9f2a7d

Download Submit
/tmp/notify.file

Filesize
37B

MD5
2539475451dd31084dde325de77c060b

SHA1
195f9726712e7080cee5687d96bb6663425896cf

SHA256
0c70e8ef58a62f2331e8fbaf58d2bb2814f820e2d43e7a248c21fa16b640313f

SHA512
c519dcad278151412085f14107fe5e99dbbe6b56113281f9d0158c5a4c1c81a3e130cd08950fa43004c6205cf076d672bc76f1dcee353e01d62c64819739db06

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

Filesize
73B

MD5
d6bfadb949b313d7896af6cfcb04ba45

SHA1
3bde38e402eefeec466238995643d4b0966a0e3e

SHA256
98683948a5019cc8b2abcbee02d55a39429ac3bf1b96dee579e3e8602c8fa1aa

SHA512
51db994475dce3c7a582bea77f0440d9bc8e0d18bdddeaf36411e72fbbb8a3852c8c29c3e7ead4fa081abab126296a09a2222b7cde1e76fd4e071223baad2ca1

Download Submit
/usr/bin/bsd-port/getty

Filesize
1.2MB

MD5
9c65f61859b4b8ae00c79ddd63abf60d

SHA1
ddf2c1d0abdef832ec746004dcdfd0cd800048ae

SHA256
fab8944e3f0541c0ff149306ea74137f7c1e9c081670906844769a45aa7171b4

SHA512
ed39ef838a9cdff65e891f65a98800ebd282645e13d9f83a6b620e3bc573a3fae8e5f312136b970977a4cdbdf5a0e600be401cf425a2d673d30c715562ab163e

Download Submit
/usr/bin/dpkgd/lsof

Filesize
171KB

MD5
061386937ec7acf924438a2643a32be0

SHA1
01a044b9e58839bea3e58c66cb32acc16241bf91

SHA256
8a26bbae9eb85aa98ef29cfe5b0a291234db6eb394c3e0c2841983dcf7dda959

SHA512
2de2e56ac4c32f47b4a1945ccfb0db378e6d59019ee8004e3e5d2ec8935efb5aa8ee14b8a0b21c61a267e195d42a3232a6dcade8720de06118fd579277f59db7

Download Submit
/usr/bin/dpkgd/ps

Filesize
134KB

MD5
d194576b899af45b1d2a448612ec21e5

SHA1
492f7d8f28cd4397ce22fcf0d8bf3304ea93465a

SHA256
a8cf81f3a1137c999c3cf336507ce120b3065e633ade01db6280d427b7d986ca

SHA512
b323babd9580b91772cde29c9f22ae75b27f5ce8ce0268a48ca41713c3545dd72409932a5c48f6af66ac6e43127eb5461d1f686bd667fa1b0e56a1564db3c539

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/usr/bin/dpkgd/ss

Filesize
164KB

MD5
51d83131b398a97dd38555ba57084721

SHA1
7d392a87f7db787dfa85fbcdf2a5ba6f0b59b4ed

SHA256
e429f9d16a4cd64593b94dee8309a427fe8ca57765bf0d2e7b822efd123fe768

SHA512
adc7137df75410c2535986c1e86c2e92e58f9bee70094f72f1f7adf3db125720ce281eb3f48474b0e192d672e96cbb1bc6e1ef6b26b10bf76a412c4516948216

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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