mrblack | 4fb50087fd3ecf8590b34a6ef40bdc227caee4314f480a4b01abab01c3e805ea

Analysis

max time kernel
149s
max time network
149s
platform
ubuntu-22.04_amd64
resource
ubuntu2204-amd64-20240729-en
resource tags

arch:amd64arch:i386image:ubuntu2204-amd64-20240729-enkernel:5.15.0-105-genericlocale:en-usos:ubuntu-22.04-amd64system
submitted
28-07-2024 06:13

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General

Target

0c2fced6cd1b58dc85669dae1736a19e_JaffaCakes118
Size

1.1MB
MD5

0c2fced6cd1b58dc85669dae1736a19e
SHA1

775a3e0e4c5e0b53c7adf2e81ab13b0994338e0a
SHA256

4fb50087fd3ecf8590b34a6ef40bdc227caee4314f480a4b01abab01c3e805ea
SHA512

cfcf9d27b21c157a250f3fbc6b359f100293218422225ae6203f96b535a897cef84046abbf44c429aeade4e4123bee1c805a7903fcd4a08cff5cba34c6d569a4
SSDEEP

24576:4vRE7caCfKGPqVEDNLFxKsfaoI+gIGYuuCol7r:4vREKfPqVE5jKsfaoRHGVo7r

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/agent	1533	agent
/usr/bin/acpid	1541	acpid

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/DbSecurityMdt	0c2fced6cd1b58dc85669dae1736a19e_JaffaCakes118
File opened for modification	/etc/init.d/selinux	agent

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/agent.conf	0c2fced6cd1b58dc85669dae1736a19e_JaffaCakes118
File opened for modification	/usr/bin/bsd-port/agent	cp
File opened for modification	/usr/bin/acpid	cp
File opened for modification	/usr/bin/dpkgd/lsof	cp
File opened for modification	/usr/bin/bsd-port/udevd.conf	0c2fced6cd1b58dc85669dae1736a19e_JaffaCakes118
File opened for modification	/usr/bin/bsd-port/agent.conf	agent
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

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	0c2fced6cd1b58dc85669dae1736a19e_JaffaCakes118
File opened for reading	/proc/cpuinfo	agent

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	0c2fced6cd1b58dc85669dae1736a19e_JaffaCakes118
File opened for reading	/proc/net/dev	agent

Reads runtime system information 24 IoCs

Reads data from /proc virtual filesystem.

description	ioc	Process
File opened for reading	/proc/filesystems	cp
File opened for reading	/proc/filesystems	cp
File opened for reading	/proc/meminfo	agent
File opened for reading	/proc/cmdline	insmod
File opened for reading	/proc/filesystems	cp
File opened for reading	/proc/sys/kernel/version	acpid
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/sys/kernel/version	0c2fced6cd1b58dc85669dae1736a19e_JaffaCakes118
File opened for reading	/proc/filesystems	mkdir
File opened for reading	/proc/stat	0c2fced6cd1b58dc85669dae1736a19e_JaffaCakes118
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	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	agent
File opened for reading	/proc/meminfo	0c2fced6cd1b58dc85669dae1736a19e_JaffaCakes118
File opened for reading	/proc/filesystems	mkdir
File opened for reading	/proc/filesystems	mkdir
File opened for reading	/proc/stat	agent

Writes file to tmp directory 7 IoCs

Malware often drops required files in the /tmp directory.

description	ioc	Process
File opened for modification	/tmp/bill.note	0c2fced6cd1b58dc85669dae1736a19e_JaffaCakes118
File opened for modification	/tmp/gates.note	0c2fced6cd1b58dc85669dae1736a19e_JaffaCakes118
File opened for modification	/tmp/notify.file	0c2fced6cd1b58dc85669dae1736a19e_JaffaCakes118
File opened for modification	/tmp/moni.note	acpid
File opened for modification	/tmp/notify.file	acpid
File opened for modification	/tmp/gates.note	acpid
File opened for modification	/tmp/moni.note	0c2fced6cd1b58dc85669dae1736a19e_JaffaCakes118

/tmp/0c2fced6cd1b58dc85669dae1736a19e_JaffaCakes118
/tmp/0c2fced6cd1b58dc85669dae1736a19e_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:1511
- /bin/sh
  sh -c "ln -s /etc/init.d/DbSecurityMdt /etc/rc1.d/S97DbSecurityMdt"
  2⤵
  PID:1517
- - /usr/bin/ln
    ln -s /etc/init.d/DbSecurityMdt /etc/rc1.d/S97DbSecurityMdt
    3⤵
    PID:1518
- /bin/sh
  sh -c "ln -s /etc/init.d/DbSecurityMdt /etc/rc2.d/S97DbSecurityMdt"
  2⤵
  PID:1519
- - /usr/bin/ln
    ln -s /etc/init.d/DbSecurityMdt /etc/rc2.d/S97DbSecurityMdt
    3⤵
    PID:1520
- /bin/sh
  sh -c "ln -s /etc/init.d/DbSecurityMdt /etc/rc3.d/S97DbSecurityMdt"
  2⤵
  PID:1521
- - /usr/bin/ln
    ln -s /etc/init.d/DbSecurityMdt /etc/rc3.d/S97DbSecurityMdt
    3⤵
    PID:1522
- /bin/sh
  sh -c "ln -s /etc/init.d/DbSecurityMdt /etc/rc4.d/S97DbSecurityMdt"
  2⤵
  PID:1523
- - /usr/bin/ln
    ln -s /etc/init.d/DbSecurityMdt /etc/rc4.d/S97DbSecurityMdt
    3⤵
    PID:1524
- /bin/sh
  sh -c "ln -s /etc/init.d/DbSecurityMdt /etc/rc5.d/S97DbSecurityMdt"
  2⤵
  PID:1525
- - /usr/bin/ln
    ln -s /etc/init.d/DbSecurityMdt /etc/rc5.d/S97DbSecurityMdt
    3⤵
    PID:1526
- /bin/sh
  sh -c "mkdir -p /usr/bin/bsd-port"
  2⤵
  PID:1527
- - /usr/bin/mkdir
    mkdir -p /usr/bin/bsd-port
    3⤵
    - Reads runtime system information
    PID:1528
- /bin/sh
  sh -c "cp -f /tmp/0c2fced6cd1b58dc85669dae1736a19e_JaffaCakes118 /usr/bin/bsd-port/agent"
  2⤵
  PID:1529
- - /usr/bin/cp
    cp -f /tmp/0c2fced6cd1b58dc85669dae1736a19e_JaffaCakes118 /usr/bin/bsd-port/agent
    3⤵
    - Write file to user bin folder
    - Reads runtime system information
    PID:1530
- /bin/sh
  sh -c /usr/bin/bsd-port/agent
  2⤵
  PID:1532
- - /usr/bin/bsd-port/agent
    /usr/bin/bsd-port/agent
    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:1533
  - - /bin/sh
      sh -c "ln -s /etc/init.d/selinux /etc/rc1.d/S99selinux"
      4⤵
      PID:1548
    - - /usr/bin/ln
        
        ln -s /etc/init.d/selinux /etc/rc1.d/S99selinux
        5⤵
        
        PID:1549
  - - /bin/sh
      sh -c "ln -s /etc/init.d/selinux /etc/rc2.d/S99selinux"
      4⤵
      PID:1550
    - - /usr/bin/ln
        
        ln -s /etc/init.d/selinux /etc/rc2.d/S99selinux
        5⤵
        
        PID:1551
  - - /bin/sh
      sh -c "ln -s /etc/init.d/selinux /etc/rc3.d/S99selinux"
      4⤵
      PID:1553
    - - /usr/bin/ln
        
        ln -s /etc/init.d/selinux /etc/rc3.d/S99selinux
        5⤵
        
        PID:1554
  - - /bin/sh
      sh -c "ln -s /etc/init.d/selinux /etc/rc4.d/S99selinux"
      4⤵
      PID:1555
    - - /usr/bin/ln
        
        ln -s /etc/init.d/selinux /etc/rc4.d/S99selinux
        5⤵
        
        PID:1556
  - - /bin/sh
      sh -c "ln -s /etc/init.d/selinux /etc/rc5.d/S99selinux"
      4⤵
      PID:1557
    - - /usr/bin/ln
        
        ln -s /etc/init.d/selinux /etc/rc5.d/S99selinux
        5⤵
        
        PID:1558
  - - /bin/sh
      sh -c "mkdir -p /usr/bin/dpkgd"
      4⤵
      PID:1559
    - - /usr/bin/mkdir
        
        mkdir -p /usr/bin/dpkgd
        5⤵
        Reads runtime system information
        
        PID:1560
  - - /bin/sh
      sh -c "cp -f /bin/lsof /usr/bin/dpkgd/lsof"
      4⤵
      PID:1562
    - - /usr/bin/cp
        
        cp -f /bin/lsof /usr/bin/dpkgd/lsof
        5⤵
        Write file to user bin folder
        Reads runtime system information
        
        PID:1563
  - - /bin/sh
      sh -c "mkdir -p /bin"
      4⤵
      PID:1564
    - - /usr/bin/mkdir
        
        mkdir -p /bin
        5⤵
        Reads runtime system information
        
        PID:1565
  - - /bin/sh
      sh -c "cp -f /usr/bin/bsd-port/agent /bin/lsof"
      4⤵
      PID:1566
    - - /usr/bin/cp
        
        cp -f /usr/bin/bsd-port/agent /bin/lsof
        5⤵
        Writes file to system bin folder
        Reads runtime system information
        
        PID:1567
  - - /bin/sh
      sh -c "chmod 0755 /bin/lsof"
      4⤵
      PID:1569
    - - /usr/bin/chmod
        
        chmod 0755 /bin/lsof
        5⤵
        
        PID:1570
  - - /bin/sh
      sh -c "cp -f /bin/ps /usr/bin/dpkgd/ps"
      4⤵
      PID:1571
    - - /usr/bin/cp
        
        cp -f /bin/ps /usr/bin/dpkgd/ps
        5⤵
        Write file to user bin folder
        Reads runtime system information
        
        PID:1572
  - - /bin/sh
      sh -c "mkdir -p /bin"
      4⤵
      PID:1573
    - - /usr/bin/mkdir
        
        mkdir -p /bin
        5⤵
        Reads runtime system information
        
        PID:1574
  - - /bin/sh
      sh -c "cp -f /usr/bin/bsd-port/agent /bin/ps"
      4⤵
      PID:1575
    - - /usr/bin/cp
        
        cp -f /usr/bin/bsd-port/agent /bin/ps
        5⤵
        Writes file to system bin folder
        Reads runtime system information
        
        PID:1576
  - - /bin/sh
      sh -c "chmod 0755 /bin/ps"
      4⤵
      PID:1578
    - - /usr/bin/chmod
        
        chmod 0755 /bin/ps
        5⤵
        
        PID:1579
  - - /bin/sh
      sh -c "mkdir -p /usr/bin"
      4⤵
      PID:1580
    - - /usr/bin/mkdir
        
        mkdir -p /usr/bin
        5⤵
        Reads runtime system information
        
        PID:1581
  - - /bin/sh
      sh -c "cp -f /usr/bin/bsd-port/agent /usr/bin/lsof"
      4⤵
      PID:1582
    - - /usr/bin/cp
        
        cp -f /usr/bin/bsd-port/agent /usr/bin/lsof
        5⤵
        Write file to user bin folder
        Reads runtime system information
        
        PID:1583
  - - /bin/sh
      sh -c "chmod 0755 /usr/bin/lsof"
      4⤵
      PID:1584
    - - /usr/bin/chmod
        
        chmod 0755 /usr/bin/lsof
        5⤵
        
        PID:1585
  - - /bin/sh
      sh -c "mkdir -p /usr/bin"
      4⤵
      PID:1587
    - - /usr/bin/mkdir
        
        mkdir -p /usr/bin
        5⤵
        Reads runtime system information
        
        PID:1588
  - - /bin/sh
      sh -c "cp -f /usr/bin/bsd-port/agent /usr/bin/ps"
      4⤵
      PID:1589
    - - /usr/bin/cp
        
        cp -f /usr/bin/bsd-port/agent /usr/bin/ps
        5⤵
        Write file to user bin folder
        Reads runtime system information
        
        PID:1590
  - - /bin/sh
      sh -c "chmod 0755 /usr/bin/ps"
      4⤵
      PID:1591
    - - /usr/bin/chmod
        
        chmod 0755 /usr/bin/ps
        5⤵
        
        PID:1592
  - - /bin/sh
      sh -c "insmod /usr/lib/xpacket.ko"
      4⤵
      PID:1593
    - - /usr/sbin/insmod
        
        insmod /usr/lib/xpacket.ko
        5⤵
        Reads runtime system information
        
        PID:1594
- /bin/sh
  sh -c "mkdir -p /usr/bin"
  2⤵
  PID:1535
- - /usr/bin/mkdir
    mkdir -p /usr/bin
    3⤵
    - Reads runtime system information
    PID:1536
- /bin/sh
  sh -c "cp -f /tmp/0c2fced6cd1b58dc85669dae1736a19e_JaffaCakes118 /usr/bin/acpid"
  2⤵
  PID:1537
- - /usr/bin/cp
    cp -f /tmp/0c2fced6cd1b58dc85669dae1736a19e_JaffaCakes118 /usr/bin/acpid
    3⤵
    - Write file to user bin folder
    - Reads runtime system information
    PID:1538
- /bin/sh
  sh -c /usr/bin/acpid
  2⤵
  PID:1540
- - /usr/bin/acpid
    /usr/bin/acpid
    3⤵
    - Executes dropped EXE
    - Reads runtime system information
    - Writes file to tmp directory
    PID:1541
- /bin/sh
  sh -c "insmod /usr/lib/xpacket.ko"
  2⤵
  PID:1543
- - /usr/sbin/insmod
    insmod /usr/lib/xpacket.ko
    3⤵
    - Reads runtime system information
    PID:1544

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/DbSecurityMdt

Filesize
64B

MD5
20abf8f4ce193d1bff023c6015e74d5d

SHA1
f9b6fc2d9252466560c31dc1426d8017968f54e5

SHA256
8e5812e41c742e0a4a2099fcf92e66b3579863d2410eb53bad788d8885e9abce

SHA512
188e905beb99c5ef759dd997b610d491145bae2e84ebdb73d3d16ce577a9b418c0decaae2bf553010ff080c547c5ef3f2f0b539a349986f46dea25a545866fa9

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/etc/init.d/selinux

Filesize
36B

MD5
c6a80f08539a4c3176762f514976dd24

SHA1
bbc5826b01d20f5c4d315ff5dbc3f216760c64ef

SHA256
ea47e885ae227059ce55d020335f7869c565ec6d85f484497e83cd4998149d5d

SHA512
9a1e3b0142876305fe389e07880bd586e97bf709273a66299d9128ff2861459104054d4e5d836aecdf73f2c11886fa3a2a8498741adb3211b96116658b856175

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/tmp/gates.note

Filesize
4B

MD5
0f3d014eead934bbdbacb62a01dc4831

SHA1
443233bf934850484d12f21d9603a36ee83d1dfb

SHA256
66c03337b22c301d55a339a94165dc09628491c3dfe01a57ef62e3eab452e898

SHA512
30e3cef49700596aa4b725177f0fca3f38355d0c45a445c6d176e9e3a4ecf4ca7bdde2a3dfaceb9f67b74bc145bb816bf3daad9414080bcb859c62de097e4b9b

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/tmp/moni.note

Filesize
4B

MD5
d010396ca8abf6ead8cacc2c2f2f26c7

SHA1
731df0fc93417f72fcb56f09cd754f9382ae6373

SHA256
596d0c702ba6d20835982c87a878f97d07a163285a0a3ee98c6e7a8e0459a8cb

SHA512
843da40f223209d8e90012e1a35004387636ffcb23cce0602a3964055ed790d271e5fd274351b8dd3afc4200e0a9d28811f7a0987f44d813e4257f10dedabeba

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/tmp/notify.file

Filesize
51B

MD5
a6d30c2be01f992f08f1585da7a0af6c

SHA1
50e88247eadee2e5ede3bcc24d3bedf8031a079d

SHA256
a1387be7c40dd79050a7fb66ec8aaed8bca80e6b454db7262a2ed4daccc20087

SHA512
e4bb2bb8ac7d195a3d8bb6bea310fc60d419c586ded7afb01ba0064b5acff2aa3385170b602efd0d4a9460866434e2b8dec034b877327392c1b0e53f6bed2699

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/usr/bin/bsd-port/agent

Filesize
1.1MB

MD5
0c2fced6cd1b58dc85669dae1736a19e

SHA1
775a3e0e4c5e0b53c7adf2e81ab13b0994338e0a

SHA256
4fb50087fd3ecf8590b34a6ef40bdc227caee4314f480a4b01abab01c3e805ea

SHA512
cfcf9d27b21c157a250f3fbc6b359f100293218422225ae6203f96b535a897cef84046abbf44c429aeade4e4123bee1c805a7903fcd4a08cff5cba34c6d569a4

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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