mrblack | cfe3dccf9ba5a17e410e8e7cf8d0ff5c1b8688f99881b53933006250b6421468

Analysis

max time kernel
149s
max time network
150s
platform
ubuntu-22.04_amd64
resource
ubuntu2204-amd64-20240522.1-en
resource tags

arch:amd64arch:i386image:ubuntu2204-amd64-20240522.1-enkernel:5.15.0-105-genericlocale:en-usos:ubuntu-22.04-amd64system
submitted
29-07-2024 20:19

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General

Target

5d9ca3020c64a239b84e32aca08af87b_JaffaCakes118
Size

1.1MB
MD5

5d9ca3020c64a239b84e32aca08af87b
SHA1

a22260a3983921f4059f15298a91b8a970bc909f
SHA256

cfe3dccf9ba5a17e410e8e7cf8d0ff5c1b8688f99881b53933006250b6421468
SHA512

35efb58ebaa5ee5a198b2678232a06e966f108a7dfc6465ebee1355e9574ea51ac647c3585434dad385a4ea962f4bf49bfb44287e8bbccd2fcef2c726660e8ce
SSDEEP

24576:4vRE7caCfKGPqVEDNLFxKsfaBI+gIGYuuCol7r:4vREKfPqVE5jKsfaBRHGVo7r

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/knerl	1593	knerl
/usr/bin/pythno	1601	pythno

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/selinux	knerl
File opened for modification	/etc/init.d/VsystemsshMdt	5d9ca3020c64a239b84e32aca08af87b_JaffaCakes118

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/dpkgd/ps	cp
File opened for modification	/usr/bin/lsof	cp
File opened for modification	/usr/bin/bsd-port/knerl.conf	5d9ca3020c64a239b84e32aca08af87b_JaffaCakes118
File opened for modification	/usr/bin/bsd-port/knerl	cp
File opened for modification	/usr/bin/pythno	cp
File opened for modification	/usr/bin/bsd-port/knerl.conf	knerl
File opened for modification	/usr/bin/ps	cp
File opened for modification	/usr/bin/bsd-port/udevd.conf	5d9ca3020c64a239b84e32aca08af87b_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	5d9ca3020c64a239b84e32aca08af87b_JaffaCakes118
File opened for reading	/proc/cpuinfo	knerl

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	5d9ca3020c64a239b84e32aca08af87b_JaffaCakes118
File opened for reading	/proc/net/dev	knerl

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	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/sys/kernel/version	5d9ca3020c64a239b84e32aca08af87b_JaffaCakes118
File opened for reading	/proc/sys/kernel/version	knerl
File opened for reading	/proc/cmdline	insmod
File opened for reading	/proc/filesystems	cp
File opened for reading	/proc/filesystems	mkdir
File opened for reading	/proc/meminfo	knerl
File opened for reading	/proc/filesystems	cp
File opened for reading	/proc/stat	5d9ca3020c64a239b84e32aca08af87b_JaffaCakes118
File opened for reading	/proc/meminfo	5d9ca3020c64a239b84e32aca08af87b_JaffaCakes118
File opened for reading	/proc/filesystems	cp
File opened for reading	/proc/cmdline	insmod
File opened for reading	/proc/sys/kernel/version	pythno
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	knerl
File opened for reading	/proc/filesystems	mkdir

Writes file to tmp directory 7 IoCs

Malware often drops required files in the /tmp directory.

description	ioc	Process
File opened for modification	/tmp/notify.file	pythno
File opened for modification	/tmp/vga.conf	pythno
File opened for modification	/tmp/idus.log	5d9ca3020c64a239b84e32aca08af87b_JaffaCakes118
File opened for modification	/tmp/apsh.conf	5d9ca3020c64a239b84e32aca08af87b_JaffaCakes118
File opened for modification	/tmp/vga.conf	5d9ca3020c64a239b84e32aca08af87b_JaffaCakes118
File opened for modification	/tmp/notify.file	5d9ca3020c64a239b84e32aca08af87b_JaffaCakes118
File opened for modification	/tmp/idus.log	pythno

/tmp/5d9ca3020c64a239b84e32aca08af87b_JaffaCakes118
/tmp/5d9ca3020c64a239b84e32aca08af87b_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:1551
- /bin/sh
  sh -c "ln -s /etc/init.d/VsystemsshMdt /etc/rc1.d/S97VsystemsshMdt"
  2⤵
  PID:1577
- - /usr/bin/ln
    ln -s /etc/init.d/VsystemsshMdt /etc/rc1.d/S97VsystemsshMdt
    3⤵
    PID:1578
- /bin/sh
  sh -c "ln -s /etc/init.d/VsystemsshMdt /etc/rc2.d/S97VsystemsshMdt"
  2⤵
  PID:1579
- - /usr/bin/ln
    ln -s /etc/init.d/VsystemsshMdt /etc/rc2.d/S97VsystemsshMdt
    3⤵
    PID:1580
- /bin/sh
  sh -c "ln -s /etc/init.d/VsystemsshMdt /etc/rc3.d/S97VsystemsshMdt"
  2⤵
  PID:1581
- - /usr/bin/ln
    ln -s /etc/init.d/VsystemsshMdt /etc/rc3.d/S97VsystemsshMdt
    3⤵
    PID:1582
- /bin/sh
  sh -c "ln -s /etc/init.d/VsystemsshMdt /etc/rc4.d/S97VsystemsshMdt"
  2⤵
  PID:1583
- - /usr/bin/ln
    ln -s /etc/init.d/VsystemsshMdt /etc/rc4.d/S97VsystemsshMdt
    3⤵
    PID:1584
- /bin/sh
  sh -c "ln -s /etc/init.d/VsystemsshMdt /etc/rc5.d/S97VsystemsshMdt"
  2⤵
  PID:1585
- - /usr/bin/ln
    ln -s /etc/init.d/VsystemsshMdt /etc/rc5.d/S97VsystemsshMdt
    3⤵
    PID:1586
- /bin/sh
  sh -c "mkdir -p /usr/bin/bsd-port"
  2⤵
  PID:1587
- - /usr/bin/mkdir
    mkdir -p /usr/bin/bsd-port
    3⤵
    - Reads runtime system information
    PID:1588
- /bin/sh
  sh -c "cp -f /tmp/5d9ca3020c64a239b84e32aca08af87b_JaffaCakes118 /usr/bin/bsd-port/knerl"
  2⤵
  PID:1589
- - /usr/bin/cp
    cp -f /tmp/5d9ca3020c64a239b84e32aca08af87b_JaffaCakes118 /usr/bin/bsd-port/knerl
    3⤵
    - Write file to user bin folder
    - Reads runtime system information
    PID:1590
- /bin/sh
  sh -c /usr/bin/bsd-port/knerl
  2⤵
  PID:1592
- - /usr/bin/bsd-port/knerl
    /usr/bin/bsd-port/knerl
    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:1593
  - - /bin/sh
      sh -c "ln -s /etc/init.d/selinux /etc/rc1.d/S99selinux"
      4⤵
      PID:1608
    - - /usr/bin/ln
        
        ln -s /etc/init.d/selinux /etc/rc1.d/S99selinux
        5⤵
        
        PID:1609
  - - /bin/sh
      sh -c "ln -s /etc/init.d/selinux /etc/rc2.d/S99selinux"
      4⤵
      PID:1610
    - - /usr/bin/ln
        
        ln -s /etc/init.d/selinux /etc/rc2.d/S99selinux
        5⤵
        
        PID:1611
  - - /bin/sh
      sh -c "ln -s /etc/init.d/selinux /etc/rc3.d/S99selinux"
      4⤵
      PID:1612
    - - /usr/bin/ln
        
        ln -s /etc/init.d/selinux /etc/rc3.d/S99selinux
        5⤵
        
        PID:1613
  - - /bin/sh
      sh -c "ln -s /etc/init.d/selinux /etc/rc4.d/S99selinux"
      4⤵
      PID:1614
    - - /usr/bin/ln
        
        ln -s /etc/init.d/selinux /etc/rc4.d/S99selinux
        5⤵
        
        PID:1615
  - - /bin/sh
      sh -c "ln -s /etc/init.d/selinux /etc/rc5.d/S99selinux"
      4⤵
      PID:1616
    - - /usr/bin/ln
        
        ln -s /etc/init.d/selinux /etc/rc5.d/S99selinux
        5⤵
        
        PID:1617
  - - /bin/sh
      sh -c "mkdir -p /usr/bin/dpkgd"
      4⤵
      PID:1618
    - - /usr/bin/mkdir
        
        mkdir -p /usr/bin/dpkgd
        5⤵
        Reads runtime system information
        
        PID:1619
  - - /bin/sh
      sh -c "cp -f /bin/lsof /usr/bin/dpkgd/lsof"
      4⤵
      PID:1621
    - - /usr/bin/cp
        
        cp -f /bin/lsof /usr/bin/dpkgd/lsof
        5⤵
        Write file to user bin folder
        Reads runtime system information
        
        PID:1622
  - - /bin/sh
      sh -c "mkdir -p /bin"
      4⤵
      PID:1623
    - - /usr/bin/mkdir
        
        mkdir -p /bin
        5⤵
        Reads runtime system information
        
        PID:1624
  - - /bin/sh
      sh -c "cp -f /usr/bin/bsd-port/knerl /bin/lsof"
      4⤵
      PID:1625
    - - /usr/bin/cp
        
        cp -f /usr/bin/bsd-port/knerl /bin/lsof
        5⤵
        Writes file to system bin folder
        Reads runtime system information
        
        PID:1626
  - - /bin/sh
      sh -c "chmod 0755 /bin/lsof"
      4⤵
      PID:1627
    - - /usr/bin/chmod
        
        chmod 0755 /bin/lsof
        5⤵
        
        PID:1628
  - - /bin/sh
      sh -c "cp -f /bin/ps /usr/bin/dpkgd/ps"
      4⤵
      PID:1630
    - - /usr/bin/cp
        
        cp -f /bin/ps /usr/bin/dpkgd/ps
        5⤵
        Write file to user bin folder
        Reads runtime system information
        
        PID:1631
  - - /bin/sh
      sh -c "mkdir -p /bin"
      4⤵
      PID:1632
    - - /usr/bin/mkdir
        
        mkdir -p /bin
        5⤵
        Reads runtime system information
        
        PID:1633
  - - /bin/sh
      sh -c "cp -f /usr/bin/bsd-port/knerl /bin/ps"
      4⤵
      PID:1634
    - - /usr/bin/cp
        
        cp -f /usr/bin/bsd-port/knerl /bin/ps
        5⤵
        Writes file to system bin folder
        Reads runtime system information
        
        PID:1635
  - - /bin/sh
      sh -c "chmod 0755 /bin/ps"
      4⤵
      PID:1636
    - - /usr/bin/chmod
        
        chmod 0755 /bin/ps
        5⤵
        
        PID:1637
  - - /bin/sh
      sh -c "mkdir -p /usr/bin"
      4⤵
      PID:1639
    - - /usr/bin/mkdir
        
        mkdir -p /usr/bin
        5⤵
        Reads runtime system information
        
        PID:1640
  - - /bin/sh
      sh -c "cp -f /usr/bin/bsd-port/knerl /usr/bin/lsof"
      4⤵
      PID:1641
    - - /usr/bin/cp
        
        cp -f /usr/bin/bsd-port/knerl /usr/bin/lsof
        5⤵
        Write file to user bin folder
        Reads runtime system information
        
        PID:1642
  - - /bin/sh
      sh -c "chmod 0755 /usr/bin/lsof"
      4⤵
      PID:1643
    - - /usr/bin/chmod
        
        chmod 0755 /usr/bin/lsof
        5⤵
        
        PID:1644
  - - /bin/sh
      sh -c "mkdir -p /usr/bin"
      4⤵
      PID:1645
    - - /usr/bin/mkdir
        
        mkdir -p /usr/bin
        5⤵
        Reads runtime system information
        
        PID:1646
  - - /bin/sh
      sh -c "cp -f /usr/bin/bsd-port/knerl /usr/bin/ps"
      4⤵
      PID:1648
    - - /usr/bin/cp
        
        cp -f /usr/bin/bsd-port/knerl /usr/bin/ps
        5⤵
        Write file to user bin folder
        Reads runtime system information
        
        PID:1650
  - - /bin/sh
      sh -c "chmod 0755 /usr/bin/ps"
      4⤵
      PID:1651
    - - /usr/bin/chmod
        
        chmod 0755 /usr/bin/ps
        5⤵
        
        PID:1652
  - - /bin/sh
      sh -c "insmod /usr/lib/xpacket.ko"
      4⤵
      PID:1653
    - - /usr/sbin/insmod
        
        insmod /usr/lib/xpacket.ko
        5⤵
        Reads runtime system information
        
        PID:1654
- /bin/sh
  sh -c "mkdir -p /usr/bin"
  2⤵
  PID:1595
- - /usr/bin/mkdir
    mkdir -p /usr/bin
    3⤵
    - Reads runtime system information
    PID:1596
- /bin/sh
  sh -c "cp -f /tmp/5d9ca3020c64a239b84e32aca08af87b_JaffaCakes118 /usr/bin/pythno"
  2⤵
  PID:1597
- - /usr/bin/cp
    cp -f /tmp/5d9ca3020c64a239b84e32aca08af87b_JaffaCakes118 /usr/bin/pythno
    3⤵
    - Write file to user bin folder
    - Reads runtime system information
    PID:1598
- /bin/sh
  sh -c /usr/bin/pythno
  2⤵
  PID:1600
- - /usr/bin/pythno
    /usr/bin/pythno
    3⤵
    - Executes dropped EXE
    - Reads runtime system information
    - Writes file to tmp directory
    PID:1601
- /bin/sh
  sh -c "insmod /usr/lib/xpacket.ko"
  2⤵
  PID:1603
- - /usr/sbin/insmod
    insmod /usr/lib/xpacket.ko
    3⤵
    - Reads runtime system information
    PID:1604

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/VsystemsshMdt

Filesize
64B

MD5
b59a2fb9f15019825fb7142dd6391e98

SHA1
43384b7554c9deff66afee790f5abd22c1910899

SHA256
f035b032e706c9c5125e4db3e8971bee5fc073147cfa88df2fbf672776ea6c2d

SHA512
896e4592c76ca942ae882fda3b32c265b3c1a62fccd4f4c78215403a3312eb5aa2c3d6c3c6edb7e5c0df766dbd8ad3cf7b653e9ca5e7728e8fb94ba71579a698

Download Submit
/etc/init.d/selinux

Filesize
36B

MD5
caa27b819c9303446f702929874a00e8

SHA1
d24199c0e376edea3f822b215148cc0dc78364bf

SHA256
da9b535a14c6d9152857e211f14fb8da9056e84ba1b8d4dc27ab79c98264050b

SHA512
dcd9413eb2cb24d77f637edfc00ca0bb42229a1a3b0d84e29eff94a7b91aee6ee8c126c286a4b4103e01834d1c6aec9de09ffab3927e8de8015421005f31446e

Download Submit
/tmp/idus.log

Filesize
4B

MD5
1bc0249a6412ef49b07fe6f62e6dc8de

SHA1
61f348dbfc99215070417b9d49da662cfd0671ef

SHA256
2f57a2e309c463513b962750096f4389e229001dccc19afcb95ff98c70e14d09

SHA512
e51fc38acc801d470d658cb9ec9f66f4a8cbcd96fb613c20bc43bbd4162ccd6c7bd223a5832f7e8eeadaa3a946a587b76c3c2e1eb1d16e6eb63ece3cbec0aa1c

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/tmp/notify.file

Filesize
51B

MD5
c9fa0849cb444f9c7b6a0c8e1ac7c5a2

SHA1
00dce9d4bbba00d5ac51bc5660468c06bb46aa7d

SHA256
49eac244df16c397fb12fa0057b429c06fde8f20c9f4816b682370d7f5ae6db0

SHA512
9c273610b56bd32ff9453b88e0f1e74880abe6ea890240388ccd29e83af3e7b9e7da2ef65487bf51a2f556c7d0de0f6a590da3575a2cc4780c0ee7daa3adb83a

Download Submit
/tmp/vga.conf

Filesize
4B

MD5
351b33587c5fdd93bd42ef7ac9995a28

SHA1
440f13f2ffe7800ae87431f50edb70aa51e49fde

SHA256
51e6811411165c04f691eb5a38cf11a7316fdd776478b4fd222fd0107973c381

SHA512
d4c03bb876b38c94d99a022f56ae99cfa0b0aebe95723c0851d5d989ef2eb6924962d0d332abcae2b9cba6fc86a0d57c11a13d2ae94df169718ba45f2ef90565

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

Filesize
1.1MB

MD5
5d9ca3020c64a239b84e32aca08af87b

SHA1
a22260a3983921f4059f15298a91b8a970bc909f

SHA256
cfe3dccf9ba5a17e410e8e7cf8d0ff5c1b8688f99881b53933006250b6421468

SHA512
35efb58ebaa5ee5a198b2678232a06e966f108a7dfc6465ebee1355e9574ea51ac647c3585434dad385a4ea962f4bf49bfb44287e8bbccd2fcef2c726660e8ce

Download Submit
/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