mrblack | de2a30e3ded0cca2729f82a010ee2359e0d1f64638934a18d53bb5ec08c8e0ab

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
15-08-2024 05:50

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General

Target

991c3e0082ac7d9b20906da53c143193_JaffaCakes118
Size

1.5MB
MD5

991c3e0082ac7d9b20906da53c143193
SHA1

ef789372f8f74eedf0ae3dfd6b0ca2c8e8d5eb5f
SHA256

de2a30e3ded0cca2729f82a010ee2359e0d1f64638934a18d53bb5ec08c8e0ab
SHA512

59a0843d1e55798b412eb672e05aaa83d2d101fa08ed9d1cdbf84914aada359b1044ffa87670cdbbfd28a694db985b0c6dc7c2d314fb2078e3db83d320ca81a7
SSDEEP

24576:GA46TrzJBisiOvhlOHdSbQmHyJgf/kgX0Exb2cyaGpIoiMsnnLmYXqSYKKZdTrnD:zRNi6OHdSbQoyJyXpxb2PaGpXiMsnLmB

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	1594	getty
/usr/bin/.sshd	1602	.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	991c3e0082ac7d9b20906da53c143193_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/dpkgd/lsof	cp
File opened for modification	/usr/bin/bsd-port/getty	cp
File opened for modification	/usr/bin/bsd-port/getty.lock	getty
File opened for modification	/usr/bin/.sshd	cp
File opened for modification	/usr/bin/dpkgd/ps	cp
File opened for modification	/usr/bin/lsof	cp
File opened for modification	/usr/bin/ps	cp
File opened for modification	/usr/bin/bsd-port/getty.lock	991c3e0082ac7d9b20906da53c143193_JaffaCakes118
File opened for modification	/usr/bin/bsd-port/udevd.lock	991c3e0082ac7d9b20906da53c143193_JaffaCakes118

Writes file to system bin folder 1 TTPs 2 IoCs

Hijack Execution Flow

T1574

description	ioc	Process
File opened for modification	/bin/lsof	cp
File opened for modification	/bin/ps	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	991c3e0082ac7d9b20906da53c143193_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	getty
File opened for reading	/proc/net/dev	991c3e0082ac7d9b20906da53c143193_JaffaCakes118

Reads runtime system information 24 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	mkdir
File opened for reading	/proc/cmdline	insmod
File opened for reading	/proc/sys/kernel/version	getty
File opened for reading	/proc/sys/kernel/version	.sshd
File opened for reading	/proc/meminfo	991c3e0082ac7d9b20906da53c143193_JaffaCakes118
File opened for reading	/proc/cmdline	insmod
File opened for reading	/proc/meminfo	getty
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	mkdir
File opened for reading	/proc/filesystems	cp
File opened for reading	/proc/sys/kernel/version	991c3e0082ac7d9b20906da53c143193_JaffaCakes118
File opened for reading	/proc/filesystems	mkdir
File opened for reading	/proc/stat	991c3e0082ac7d9b20906da53c143193_JaffaCakes118
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/stat	getty

Writes file to tmp directory 7 IoCs

Malware often drops required files in the /tmp directory.

description	ioc	Process
File opened for modification	/tmp/gates.lock	.sshd
File opened for modification	/tmp/moni.lock	991c3e0082ac7d9b20906da53c143193_JaffaCakes118
File opened for modification	/tmp/bill.lock	991c3e0082ac7d9b20906da53c143193_JaffaCakes118
File opened for modification	/tmp/gates.lock	991c3e0082ac7d9b20906da53c143193_JaffaCakes118
File opened for modification	/tmp/notify.file	991c3e0082ac7d9b20906da53c143193_JaffaCakes118
File opened for modification	/tmp/moni.lock	.sshd
File opened for modification	/tmp/notify.file	.sshd

/tmp/991c3e0082ac7d9b20906da53c143193_JaffaCakes118
/tmp/991c3e0082ac7d9b20906da53c143193_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:1566
- /bin/sh
  sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc1.d/S97DbSecuritySpt"
  2⤵
  PID:1578
- - /usr/bin/ln
    ln -s /etc/init.d/DbSecuritySpt /etc/rc1.d/S97DbSecuritySpt
    3⤵
    PID:1579
- /bin/sh
  sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc2.d/S97DbSecuritySpt"
  2⤵
  PID:1580
- - /usr/bin/ln
    ln -s /etc/init.d/DbSecuritySpt /etc/rc2.d/S97DbSecuritySpt
    3⤵
    PID:1581
- /bin/sh
  sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc3.d/S97DbSecuritySpt"
  2⤵
  PID:1582
- - /usr/bin/ln
    ln -s /etc/init.d/DbSecuritySpt /etc/rc3.d/S97DbSecuritySpt
    3⤵
    PID:1583
- /bin/sh
  sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc4.d/S97DbSecuritySpt"
  2⤵
  PID:1584
- - /usr/bin/ln
    ln -s /etc/init.d/DbSecuritySpt /etc/rc4.d/S97DbSecuritySpt
    3⤵
    PID:1585
- /bin/sh
  sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc5.d/S97DbSecuritySpt"
  2⤵
  PID:1586
- - /usr/bin/ln
    ln -s /etc/init.d/DbSecuritySpt /etc/rc5.d/S97DbSecuritySpt
    3⤵
    PID:1587
- /bin/sh
  sh -c "mkdir -p /usr/bin/bsd-port"
  2⤵
  PID:1588
- - /usr/bin/mkdir
    mkdir -p /usr/bin/bsd-port
    3⤵
    - Reads runtime system information
    PID:1589
- /bin/sh
  sh -c "cp -f /tmp/991c3e0082ac7d9b20906da53c143193_JaffaCakes118 /usr/bin/bsd-port/getty"
  2⤵
  PID:1590
- - /usr/bin/cp
    cp -f /tmp/991c3e0082ac7d9b20906da53c143193_JaffaCakes118 /usr/bin/bsd-port/getty
    3⤵
    - Write file to user bin folder
    - Reads runtime system information
    PID:1591
- /bin/sh
  sh -c /usr/bin/bsd-port/getty
  2⤵
  PID:1593
- - /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:1594
  - - /bin/sh
      sh -c "ln -s /etc/init.d/selinux /etc/rc1.d/S99selinux"
      4⤵
      PID:1614
    - - /usr/bin/ln
        
        ln -s /etc/init.d/selinux /etc/rc1.d/S99selinux
        5⤵
        
        PID:1615
  - - /bin/sh
      sh -c "ln -s /etc/init.d/selinux /etc/rc2.d/S99selinux"
      4⤵
      PID:1616
    - - /usr/bin/ln
        
        ln -s /etc/init.d/selinux /etc/rc2.d/S99selinux
        5⤵
        
        PID:1617
  - - /bin/sh
      sh -c "ln -s /etc/init.d/selinux /etc/rc3.d/S99selinux"
      4⤵
      PID:1618
    - - /usr/bin/ln
        
        ln -s /etc/init.d/selinux /etc/rc3.d/S99selinux
        5⤵
        
        PID:1619
  - - /bin/sh
      sh -c "ln -s /etc/init.d/selinux /etc/rc4.d/S99selinux"
      4⤵
      PID:1620
    - - /usr/bin/ln
        
        ln -s /etc/init.d/selinux /etc/rc4.d/S99selinux
        5⤵
        
        PID:1621
  - - /bin/sh
      sh -c "ln -s /etc/init.d/selinux /etc/rc5.d/S99selinux"
      4⤵
      PID:1622
    - - /usr/bin/ln
        
        ln -s /etc/init.d/selinux /etc/rc5.d/S99selinux
        5⤵
        
        PID:1623
  - - /bin/sh
      sh -c "mkdir -p /usr/bin/dpkgd"
      4⤵
      PID:1624
    - - /usr/bin/mkdir
        
        mkdir -p /usr/bin/dpkgd
        5⤵
        Reads runtime system information
        
        PID:1625
  - - /bin/sh
      sh -c "cp -f /bin/lsof /usr/bin/dpkgd/lsof"
      4⤵
      PID:1626
    - - /usr/bin/cp
        
        cp -f /bin/lsof /usr/bin/dpkgd/lsof
        5⤵
        Write file to user bin folder
        Reads runtime system information
        
        PID:1627
  - - /bin/sh
      sh -c "mkdir -p /bin"
      4⤵
      PID:1628
    - - /usr/bin/mkdir
        
        mkdir -p /bin
        5⤵
        Reads runtime system information
        
        PID:1629
  - - /bin/sh
      sh -c "cp -f /usr/bin/bsd-port/getty /bin/lsof"
      4⤵
      PID:1630
    - - /usr/bin/cp
        
        cp -f /usr/bin/bsd-port/getty /bin/lsof
        5⤵
        Writes file to system bin folder
        Reads runtime system information
        
        PID:1631
  - - /bin/sh
      sh -c "chmod 0755 /bin/lsof"
      4⤵
      PID:1632
    - - /usr/bin/chmod
        
        chmod 0755 /bin/lsof
        5⤵
        
        PID:1633
  - - /bin/sh
      sh -c "cp -f /bin/ps /usr/bin/dpkgd/ps"
      4⤵
      PID:1634
    - - /usr/bin/cp
        
        cp -f /bin/ps /usr/bin/dpkgd/ps
        5⤵
        Write file to user bin folder
        Reads runtime system information
        
        PID:1635
  - - /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/ps"
      4⤵
      PID:1638
    - - /usr/bin/cp
        
        cp -f /usr/bin/bsd-port/getty /bin/ps
        5⤵
        Writes file to system bin folder
        Reads runtime system information
        
        PID:1639
  - - /bin/sh
      sh -c "chmod 0755 /bin/ps"
      4⤵
      PID:1641
    - - /usr/bin/chmod
        
        chmod 0755 /bin/ps
        5⤵
        
        PID:1643
  - - /bin/sh
      sh -c "mkdir -p /usr/bin"
      4⤵
      PID:1644
    - - /usr/bin/mkdir
        
        mkdir -p /usr/bin
        5⤵
        Reads runtime system information
        
        PID:1645
  - - /bin/sh
      sh -c "cp -f /usr/bin/bsd-port/getty /usr/bin/lsof"
      4⤵
      PID:1646
    - - /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:1647
  - - /bin/sh
      sh -c "chmod 0755 /usr/bin/lsof"
      4⤵
      PID:1648
    - - /usr/bin/chmod
        
        chmod 0755 /usr/bin/lsof
        5⤵
        
        PID:1649
  - - /bin/sh
      sh -c "mkdir -p /usr/bin"
      4⤵
      PID:1650
    - - /usr/bin/mkdir
        
        mkdir -p /usr/bin
        5⤵
        Reads runtime system information
        
        PID:1651
  - - /bin/sh
      sh -c "cp -f /usr/bin/bsd-port/getty /usr/bin/ps"
      4⤵
      PID:1652
    - - /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:1653
  - - /bin/sh
      sh -c "chmod 0755 /usr/bin/ps"
      4⤵
      PID:1654
    - - /usr/bin/chmod
        
        chmod 0755 /usr/bin/ps
        5⤵
        
        PID:1655
  - - /bin/sh
      sh -c "insmod /usr/lib/xpacket.ko"
      4⤵
      PID:1656
    - - /usr/sbin/insmod
        
        insmod /usr/lib/xpacket.ko
        5⤵
        Reads runtime system information
        
        PID:1657
- /bin/sh
  sh -c "mkdir -p /usr/bin"
  2⤵
  PID:1596
- - /usr/bin/mkdir
    mkdir -p /usr/bin
    3⤵
    - Reads runtime system information
    PID:1597
- /bin/sh
  sh -c "cp -f /tmp/991c3e0082ac7d9b20906da53c143193_JaffaCakes118 /usr/bin/.sshd"
  2⤵
  PID:1598
- - /usr/bin/cp
    cp -f /tmp/991c3e0082ac7d9b20906da53c143193_JaffaCakes118 /usr/bin/.sshd
    3⤵
    - Write file to user bin folder
    - Reads runtime system information
    PID:1599
- /bin/sh
  sh -c /usr/bin/.sshd
  2⤵
  PID:1601
- - /usr/bin/.sshd
    /usr/bin/.sshd
    3⤵
    - Executes dropped EXE
    - Reads runtime system information
    - Writes file to tmp directory
    PID:1602
- /bin/sh
  sh -c "insmod /usr/lib/xpacket.ko"
  2⤵
  PID:1604
- - /usr/sbin/insmod
    insmod /usr/lib/xpacket.ko
    3⤵
    - Reads runtime system information
    PID:1605

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
464d619af1fd9b49ee99a13962408ecf

SHA1
ff4affb2a16fb0e43cc8fc7f1ad03614b34fa27f

SHA256
d19601439b3118f6595c7b171077f40f2d4d0fc88f1397f1c0c2805c9ab85d97

SHA512
f742165769e07ed32ad203869e492d5a20d3a22ed268c0c10bbd444d8834651db8b78dafedb41b662730301590ae80db93e32b9ac73e6a846b4d5eb904e4c73c

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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
18d10dc6e666eab6de9215ae5b3d54df

SHA1
541f30554e2caa245dbe67fc4a03cb8c01a23c1a

SHA256
0651ee70db05737d7195776455175f3f4dbd4755e13e9f87d905a63817e979b8

SHA512
1cae3720d2a29bef7cc3e0280686ceefd518a0cf35f0fd239a6fe60329b78935dbc88d5c7a784e2029d1c70ad321ff3dc8f514a5901b515da88c8b3c436f5465

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/tmp/moni.lock

Filesize
4B

MD5
f3173935ed8ac4bf073c1bcd63171f8a

SHA1
9ab5e1675014494dc3913b5c300efdee7528c083

SHA256
bf0a60ee19adc7954e2248d0c4fd7fed44671ea2cff24a6c75127f9ce0183608

SHA512
a54446220d5b23696fff3c17b4e0834e1159b2a080842d5fc89ef93873218e6745433a59e3b037845a4a053d2fea7ab0b3a2d346b4ae3bed5e407952dd8d00b2

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/tmp/notify.file

Filesize
51B

MD5
90ab423a414d6e4a9bb885c17a1483ec

SHA1
12ff16eb93bae62907d0e1ae86e3283a401bea89

SHA256
cc6a80fb5e1c2a63598fd366e4e4bfdd6f4d8adc79f7ce4205332e7bd3f605fb

SHA512
a60f90ea824a87371723480fd3a7f63bf3418c4dfc5883352bf2bf8785ca05f341ad349d8084ffaac650c59febda56f084a6e14c4f63be1b6199894e59ea0e57

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/usr/bin/bsd-port/getty

Filesize
1.5MB

MD5
991c3e0082ac7d9b20906da53c143193

SHA1
ef789372f8f74eedf0ae3dfd6b0ca2c8e8d5eb5f

SHA256
de2a30e3ded0cca2729f82a010ee2359e0d1f64638934a18d53bb5ec08c8e0ab

SHA512
59a0843d1e55798b412eb672e05aaa83d2d101fa08ed9d1cdbf84914aada359b1044ffa87670cdbbfd28a694db985b0c6dc7c2d314fb2078e3db83d320ca81a7

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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