mrblack | e4883dda7079c57d623a0b7b7bd2ede4c796f1e00fe5cf039daedd25dd26c957

Analysis

max time kernel
149s
max time network
150s
platform
ubuntu-22.04_amd64
resource
ubuntu2204-amd64-20240611-en
resource tags

arch:amd64arch:i386image:ubuntu2204-amd64-20240611-enkernel:5.15.0-105-genericlocale:en-usos:ubuntu-22.04-amd64system
submitted
01-08-2024 04:19

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General

Target

7f25db5cb1cc08f7eb7c0f5fa46268ef_JaffaCakes118
Size

1.1MB
MD5

7f25db5cb1cc08f7eb7c0f5fa46268ef
SHA1

c1325e3dc4881fa1c09c7f497e60b7fd0f663ba0
SHA256

e4883dda7079c57d623a0b7b7bd2ede4c796f1e00fe5cf039daedd25dd26c957
SHA512

961f221083d4f88a55a7d2424849302e18cc2e5b91f63bf776fe2beb3111569903fde685e0ec9802c83e414208fdb6af7c497fb11ff9823108ce9eca0bc1fa1b
SSDEEP

24576:4vRE7caCfKGPqVEDNLFxKsfaAI+gIGYuuCol7r:4vREKfPqVE5jKsfaARHGVo7r

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	1604	getty
/usr/bin/.sshd	1612	.sshd

Modifies init.d 1 TTPs 2 IoCs

Adds/modifies system service, likely for persistence.

persistence

Boot or Logon Autostart Execution

T1547

description	ioc	Process
File opened for modification	/etc/init.d/DbSecuritySpt	7f25db5cb1cc08f7eb7c0f5fa46268ef_JaffaCakes118
File opened for modification	/etc/init.d/selinux	getty

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/getty.lock	7f25db5cb1cc08f7eb7c0f5fa46268ef_JaffaCakes118
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/getty.lock	getty
File opened for modification	/usr/bin/dpkgd/ps	cp
File opened for modification	/usr/bin/bsd-port/udevd.lock	7f25db5cb1cc08f7eb7c0f5fa46268ef_JaffaCakes118
File opened for modification	/usr/bin/dpkgd/lsof	cp
File opened for modification	/usr/bin/lsof	cp
File opened for modification	/usr/bin/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/lsof	cp

Checks CPU configuration 1 TTPs 2 IoCs

Checks CPU information which indicate if the system is a virtual machine.

antivm

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
File opened for reading	/proc/cpuinfo	7f25db5cb1cc08f7eb7c0f5fa46268ef_JaffaCakes118
File opened for reading	/proc/cpuinfo	getty

Reads system network configuration 1 TTPs 2 IoCs

Uses contents of /proc filesystem to enumerate network settings.

System Network Configuration Discovery

T1016

description	ioc	Process
File opened for reading	/proc/net/dev	7f25db5cb1cc08f7eb7c0f5fa46268ef_JaffaCakes118
File opened for reading	/proc/net/dev	getty

Reads runtime system information 24 IoCs

Reads data from /proc virtual filesystem.

description	ioc	Process
File opened for reading	/proc/sys/kernel/version	getty
File opened for reading	/proc/sys/kernel/version	.sshd
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/sys/kernel/version	7f25db5cb1cc08f7eb7c0f5fa46268ef_JaffaCakes118
File opened for reading	/proc/filesystems	mkdir
File opened for reading	/proc/stat	7f25db5cb1cc08f7eb7c0f5fa46268ef_JaffaCakes118
File opened for reading	/proc/meminfo	7f25db5cb1cc08f7eb7c0f5fa46268ef_JaffaCakes118
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/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	mkdir
File opened for reading	/proc/stat	getty
File opened for reading	/proc/meminfo	getty
File opened for reading	/proc/cmdline	insmod

Writes file to tmp directory 7 IoCs

Malware often drops required files in the /tmp directory.

description	ioc	Process
File opened for modification	/tmp/moni.lock	.sshd
File opened for modification	/tmp/notify.file	.sshd
File opened for modification	/tmp/gates.lock	.sshd
File opened for modification	/tmp/moni.lock	7f25db5cb1cc08f7eb7c0f5fa46268ef_JaffaCakes118
File opened for modification	/tmp/bill.lock	7f25db5cb1cc08f7eb7c0f5fa46268ef_JaffaCakes118
File opened for modification	/tmp/gates.lock	7f25db5cb1cc08f7eb7c0f5fa46268ef_JaffaCakes118
File opened for modification	/tmp/notify.file	7f25db5cb1cc08f7eb7c0f5fa46268ef_JaffaCakes118

/tmp/7f25db5cb1cc08f7eb7c0f5fa46268ef_JaffaCakes118
/tmp/7f25db5cb1cc08f7eb7c0f5fa46268ef_JaffaCakes118
1⤵
- Modifies init.d
- Write file to user bin folder
- Checks CPU configuration
- Reads system network configuration
- Reads runtime system information
- Writes file to tmp directory
PID:1582
- /bin/sh
  sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc1.d/S97DbSecuritySpt"
  2⤵
  PID:1588
- - /usr/bin/ln
    ln -s /etc/init.d/DbSecuritySpt /etc/rc1.d/S97DbSecuritySpt
    3⤵
    PID:1589
- /bin/sh
  sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc2.d/S97DbSecuritySpt"
  2⤵
  PID:1590
- - /usr/bin/ln
    ln -s /etc/init.d/DbSecuritySpt /etc/rc2.d/S97DbSecuritySpt
    3⤵
    PID:1591
- /bin/sh
  sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc3.d/S97DbSecuritySpt"
  2⤵
  PID:1592
- - /usr/bin/ln
    ln -s /etc/init.d/DbSecuritySpt /etc/rc3.d/S97DbSecuritySpt
    3⤵
    PID:1593
- /bin/sh
  sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc4.d/S97DbSecuritySpt"
  2⤵
  PID:1594
- - /usr/bin/ln
    ln -s /etc/init.d/DbSecuritySpt /etc/rc4.d/S97DbSecuritySpt
    3⤵
    PID:1595
- /bin/sh
  sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc5.d/S97DbSecuritySpt"
  2⤵
  PID:1596
- - /usr/bin/ln
    ln -s /etc/init.d/DbSecuritySpt /etc/rc5.d/S97DbSecuritySpt
    3⤵
    PID:1597
- /bin/sh
  sh -c "mkdir -p /usr/bin/bsd-port"
  2⤵
  PID:1598
- - /usr/bin/mkdir
    mkdir -p /usr/bin/bsd-port
    3⤵
    - Reads runtime system information
    PID:1599
- /bin/sh
  sh -c "cp -f /tmp/7f25db5cb1cc08f7eb7c0f5fa46268ef_JaffaCakes118 /usr/bin/bsd-port/getty"
  2⤵
  PID:1600
- - /usr/bin/cp
    cp -f /tmp/7f25db5cb1cc08f7eb7c0f5fa46268ef_JaffaCakes118 /usr/bin/bsd-port/getty
    3⤵
    - Write file to user bin folder
    - Reads runtime system information
    PID:1601
- /bin/sh
  sh -c /usr/bin/bsd-port/getty
  2⤵
  PID:1603
- - /usr/bin/bsd-port/getty
    /usr/bin/bsd-port/getty
    3⤵
    - Executes dropped EXE
    - Modifies init.d
    - Write file to user bin folder
    - Checks CPU configuration
    - Reads system network configuration
    - Reads runtime system information
    PID:1604
  - - /bin/sh
      sh -c "ln -s /etc/init.d/selinux /etc/rc1.d/S99selinux"
      4⤵
      PID:1620
    - - /usr/bin/ln
        
        ln -s /etc/init.d/selinux /etc/rc1.d/S99selinux
        5⤵
        
        PID:1621
  - - /bin/sh
      sh -c "ln -s /etc/init.d/selinux /etc/rc2.d/S99selinux"
      4⤵
      PID:1622
    - - /usr/bin/ln
        
        ln -s /etc/init.d/selinux /etc/rc2.d/S99selinux
        5⤵
        
        PID:1623
  - - /bin/sh
      sh -c "ln -s /etc/init.d/selinux /etc/rc3.d/S99selinux"
      4⤵
      PID:1624
    - - /usr/bin/ln
        
        ln -s /etc/init.d/selinux /etc/rc3.d/S99selinux
        5⤵
        
        PID:1625
  - - /bin/sh
      sh -c "ln -s /etc/init.d/selinux /etc/rc4.d/S99selinux"
      4⤵
      PID:1626
    - - /usr/bin/ln
        
        ln -s /etc/init.d/selinux /etc/rc4.d/S99selinux
        5⤵
        
        PID:1627
  - - /bin/sh
      sh -c "ln -s /etc/init.d/selinux /etc/rc5.d/S99selinux"
      4⤵
      PID:1629
    - - /usr/bin/ln
        
        ln -s /etc/init.d/selinux /etc/rc5.d/S99selinux
        5⤵
        
        PID:1630
  - - /bin/sh
      sh -c "mkdir -p /usr/bin/dpkgd"
      4⤵
      PID:1631
    - - /usr/bin/mkdir
        
        mkdir -p /usr/bin/dpkgd
        5⤵
        Reads runtime system information
        
        PID:1632
  - - /bin/sh
      sh -c "cp -f /bin/lsof /usr/bin/dpkgd/lsof"
      4⤵
      PID:1633
    - - /usr/bin/cp
        
        cp -f /bin/lsof /usr/bin/dpkgd/lsof
        5⤵
        Write file to user bin folder
        Reads runtime system information
        
        PID:1634
  - - /bin/sh
      sh -c "mkdir -p /bin"
      4⤵
      PID:1636
    - - /usr/bin/mkdir
        
        mkdir -p /bin
        5⤵
        Reads runtime system information
        
        PID:1637
  - - /bin/sh
      sh -c "cp -f /usr/bin/bsd-port/getty /bin/lsof"
      4⤵
      PID:1638
    - - /usr/bin/cp
        
        cp -f /usr/bin/bsd-port/getty /bin/lsof
        5⤵
        Writes file to system bin folder
        Reads runtime system information
        
        PID:1639
  - - /bin/sh
      sh -c "chmod 0755 /bin/lsof"
      4⤵
      PID:1640
    - - /usr/bin/chmod
        
        chmod 0755 /bin/lsof
        5⤵
        
        PID:1642
  - - /bin/sh
      sh -c "cp -f /bin/ps /usr/bin/dpkgd/ps"
      4⤵
      PID:1643
    - - /usr/bin/cp
        
        cp -f /bin/ps /usr/bin/dpkgd/ps
        5⤵
        Write file to user bin folder
        Reads runtime system information
        
        PID:1644
  - - /bin/sh
      sh -c "mkdir -p /bin"
      4⤵
      PID:1645
    - - /usr/bin/mkdir
        
        mkdir -p /bin
        5⤵
        Reads runtime system information
        
        PID:1646
  - - /bin/sh
      sh -c "cp -f /usr/bin/bsd-port/getty /bin/ps"
      4⤵
      PID:1647
    - - /usr/bin/cp
        
        cp -f /usr/bin/bsd-port/getty /bin/ps
        5⤵
        Writes file to system bin folder
        Reads runtime system information
        
        PID:1648
  - - /bin/sh
      sh -c "chmod 0755 /bin/ps"
      4⤵
      PID:1649
    - - /usr/bin/chmod
        
        chmod 0755 /bin/ps
        5⤵
        
        PID:1650
  - - /bin/sh
      sh -c "mkdir -p /usr/bin"
      4⤵
      PID:1651
    - - /usr/bin/mkdir
        
        mkdir -p /usr/bin
        5⤵
        Reads runtime system information
        
        PID:1652
  - - /bin/sh
      sh -c "cp -f /usr/bin/bsd-port/getty /usr/bin/lsof"
      4⤵
      PID:1653
    - - /usr/bin/cp
        
        cp -f /usr/bin/bsd-port/getty /usr/bin/lsof
        5⤵
        Write file to user bin folder
        Reads runtime system information
        
        PID:1654
  - - /bin/sh
      sh -c "chmod 0755 /usr/bin/lsof"
      4⤵
      PID:1655
    - - /usr/bin/chmod
        
        chmod 0755 /usr/bin/lsof
        5⤵
        
        PID:1656
  - - /bin/sh
      sh -c "mkdir -p /usr/bin"
      4⤵
      PID:1657
    - - /usr/bin/mkdir
        
        mkdir -p /usr/bin
        5⤵
        Reads runtime system information
        
        PID:1658
  - - /bin/sh
      sh -c "cp -f /usr/bin/bsd-port/getty /usr/bin/ps"
      4⤵
      PID:1659
    - - /usr/bin/cp
        
        cp -f /usr/bin/bsd-port/getty /usr/bin/ps
        5⤵
        Write file to user bin folder
        Reads runtime system information
        
        PID:1660
  - - /bin/sh
      sh -c "chmod 0755 /usr/bin/ps"
      4⤵
      PID:1661
    - - /usr/bin/chmod
        
        chmod 0755 /usr/bin/ps
        5⤵
        
        PID:1662
  - - /bin/sh
      sh -c "insmod /usr/lib/xpacket.ko"
      4⤵
      PID:1663
    - - /usr/sbin/insmod
        
        insmod /usr/lib/xpacket.ko
        5⤵
        Reads runtime system information
        
        PID:1664
- /bin/sh
  sh -c "mkdir -p /usr/bin"
  2⤵
  PID:1606
- - /usr/bin/mkdir
    mkdir -p /usr/bin
    3⤵
    - Reads runtime system information
    PID:1607
- /bin/sh
  sh -c "cp -f /tmp/7f25db5cb1cc08f7eb7c0f5fa46268ef_JaffaCakes118 /usr/bin/.sshd"
  2⤵
  PID:1608
- - /usr/bin/cp
    cp -f /tmp/7f25db5cb1cc08f7eb7c0f5fa46268ef_JaffaCakes118 /usr/bin/.sshd
    3⤵
    - Write file to user bin folder
    - Reads runtime system information
    PID:1609
- /bin/sh
  sh -c /usr/bin/.sshd
  2⤵
  PID:1611
- - /usr/bin/.sshd
    /usr/bin/.sshd
    3⤵
    - Executes dropped EXE
    - Reads runtime system information
    - Writes file to tmp directory
    PID:1612
- /bin/sh
  sh -c "insmod /usr/lib/xpacket.ko"
  2⤵
  PID:1614
- - /usr/sbin/insmod
    insmod /usr/lib/xpacket.ko
    3⤵
    - 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/init.d/DbSecuritySpt

Filesize
64B

MD5
c30b0271e29006e4df38adf85b145f13

SHA1
4f0864589fcd6d264af71b48f3b91da9111f804c

SHA256
e2fb4d08e493d1d79c1aaee298a186193823c154695c8f5d5abdc2f062549ffa

SHA512
7219b67dfbba33fac67a205d194e5902d9fd1bb73f78feb31e5cb38792204bdf2a2f80205bd3cc136f0cc53c37fdb55e5f9b17ad0f13c415451942e87613f843

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/etc/init.d/selinux

Filesize
36B

MD5
993cc15058142d96c3daf7852c3d5ee8

SHA1
0950b8b391b04dd3895ea33cd3141543ebd2525d

SHA256
8171d077918611803d93088409f220c66fae1c670b297e1aa5d8cbd548ce9208

SHA512
0c4256c00a3710f97e92581b552682b36b62afc35fe72622c491323c618c19ea62611ac04ccafc3dfcde2254a2ebbd93b69b66795b16e36332293bed83adb928

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/tmp/gates.lock

Filesize
4B

MD5
076023edc9187cf1ac1f1163470e479a

SHA1
8dc863f4a133deb08253e1f8f60838d804a6dc89

SHA256
6360659f97100b35f3dd80cd08358fb415757f07ee670a9e1d3b4ae7fa14a0cf

SHA512
fe6f8107fefb24c879acea3d283ab4f2c9b43ed948e294305b7a8539b2e80c6b3901956d4f1561ce2a609eee6a00c5e9e9c830b441911d9a5250ef4d157777b0

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/tmp/moni.lock

Filesize
4B

MD5
69d658d0b2859e32cd4dc3b970c8496c

SHA1
2a7bcf3804dc71895222bdd5f95e64444ce51654

SHA256
96382608813353bee4eeaf0635a3b3356276fece94fe8c9cf048871078f8fd14

SHA512
1222e306ef8fe358e297a275b61a3bb9aca3ec2b38ed1056fd2816b7bba7b32104218680531d8f8f12cea6e4e726c06daea88cf427163bd3365d0675350a428c

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/tmp/notify.file

Filesize
51B

MD5
7735737b33c06b524481a14c91bf4286

SHA1
2848da66adf79aede3fc36c63815f13e97697045

SHA256
6014129e22fdbcba540e36810d402ffb32388efc180694729b9ef5ede4664c40

SHA512
ceaa154e4b0c6aa7b8434589ef8411787f22f59be853d125bd04043116022bca66d1d96bd55dc3aa08ca503e59167940796a4d5bebbcf9860a77460b67f29b4b

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

Filesize
1.1MB

MD5
7f25db5cb1cc08f7eb7c0f5fa46268ef

SHA1
c1325e3dc4881fa1c09c7f497e60b7fd0f663ba0

SHA256
e4883dda7079c57d623a0b7b7bd2ede4c796f1e00fe5cf039daedd25dd26c957

SHA512
961f221083d4f88a55a7d2424849302e18cc2e5b91f63bf776fe2beb3111569903fde685e0ec9802c83e414208fdb6af7c497fb11ff9823108ce9eca0bc1fa1b

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/usr/bin/dpkgd/lsof

Filesize
163KB

MD5
ab57b66cc531ae0f996963223e632b60

SHA1
bf7e5becd33f21c2539f5a75ffa0ab61c49c8795

SHA256
2484863a7bfda7f97b90bfd5dfceed4ec9f27dd51f9c5158c8daabbf4309b1df

SHA512
908acef13f3c1d80b7169ec3b16bb67006013453348fff75550bc3c6c2137e798b21d7990edbd5be63d756d9c41b06160aebf38aa80547e4bafa3a62596057f6

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/usr/bin/dpkgd/ps

Filesize
138KB

MD5
8146139c2ad7e550b1d1f49480997446

SHA1
074db8890c3227bd8a588417f5b9bde637bcf3af

SHA256
207df9d438f75185ab3af2ab1173d104831a6631c28ef40d38b2ab43de27b40f

SHA512
b6d71d537f593b9af833e6f798e412e95fc486a313414ed8cca9639f61be7ac9dca700e9f861c0d07c7f65b3783127a67f829f422472cad8938ba01d397ab9de

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads