mrblack | 7b9adbfa310a061e4d4becad8fb32260da09563bf0b1477267329a131c5b48c8

Analysis

max time kernel
149s
max time network
151s
platform
ubuntu-20.04_amd64
resource
ubuntu2004-amd64-20240611-en
resource tags

arch:amd64arch:i386image:ubuntu2004-amd64-20240611-enkernel:5.4.0-169-genericlocale:en-usos:ubuntu-20.04-amd64system
submitted
22-08-2024 10:52

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General

Target

b75b09877672a416a18a65de4183c2a1_JaffaCakes118
Size

1.1MB
MD5

b75b09877672a416a18a65de4183c2a1
SHA1

165c14b37464e5212b4e580804198c7c7c603041
SHA256

7b9adbfa310a061e4d4becad8fb32260da09563bf0b1477267329a131c5b48c8
SHA512

75886f0807a4da826ab4dfd43d19b315c3628056292b89a6f62290a78937bb371864eafccdf98009f19f49c1664bdfdf412a6c52f2066dc8493eb76e4a5d186a
SSDEEP

24576:4vRE7caCfKGPqVEDNLFxKsfa5I+gIGYuuCol7r:4vREKfPqVE5jKsfa5RHGVo7r

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	1461	knerl
/usr/bin/.sshd	1469	.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/QsystemsshMmt	b75b09877672a416a18a65de4183c2a1_JaffaCakes118
File opened for modification	/etc/init.d/selinux	knerl

Reads system routing table 1 TTPs 1 IoCs

Gets active network interfaces from /proc virtual filesystem.

System Network Configuration Discovery

T1016

description	ioc	Process
File opened for reading	/proc/net/route	b75b09877672a416a18a65de4183c2a1_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	b75b09877672a416a18a65de4183c2a1_JaffaCakes118
File opened for modification	/usr/bin/bsd-port/udevd.conf	b75b09877672a416a18a65de4183c2a1_JaffaCakes118
File opened for modification	/usr/bin/bsd-port/knerl	cp
File opened for modification	/usr/bin/.sshd	cp
File opened for modification	/usr/bin/bsd-port/knerl.conf	knerl
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/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	b75b09877672a416a18a65de4183c2a1_JaffaCakes118
File opened for reading	/proc/cpuinfo	knerl

Reads system network configuration 1 TTPs 4 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	b75b09877672a416a18a65de4183c2a1_JaffaCakes118
File opened for reading	/proc/net/dev	knerl
File opened for reading	/proc/net/route	b75b09877672a416a18a65de4183c2a1_JaffaCakes118
File opened for reading	/proc/net/arp	b75b09877672a416a18a65de4183c2a1_JaffaCakes118

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	mkdir
File opened for reading	/proc/filesystems	mkdir
File opened for reading	/proc/filesystems	cp
File opened for reading	/proc/meminfo	b75b09877672a416a18a65de4183c2a1_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	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/filesystems	mkdir
File opened for reading	/proc/stat	knerl
File opened for reading	/proc/sys/kernel/version	knerl
File opened for reading	/proc/stat	b75b09877672a416a18a65de4183c2a1_JaffaCakes118
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/meminfo	knerl
File opened for reading	/proc/sys/kernel/version	b75b09877672a416a18a65de4183c2a1_JaffaCakes118
File opened for reading	/proc/cmdline	insmod
File opened for reading	/proc/cmdline	insmod
File opened for reading	/proc/sys/kernel/version	.sshd

Writes file to tmp directory 8 IoCs

Malware often drops required files in the /tmp directory.

description	ioc	Process
File opened for modification	/tmp/conf.n	b75b09877672a416a18a65de4183c2a1_JaffaCakes118
File opened for modification	/tmp/Dest.cfg	.sshd
File opened for modification	/tmp/appq.log	b75b09877672a416a18a65de4183c2a1_JaffaCakes118
File opened for modification	/tmp/appq.conf	b75b09877672a416a18a65de4183c2a1_JaffaCakes118
File opened for modification	/tmp/Dest.cfg	b75b09877672a416a18a65de4183c2a1_JaffaCakes118
File opened for modification	/tmp/notify.file	b75b09877672a416a18a65de4183c2a1_JaffaCakes118
File opened for modification	/tmp/appq.log	.sshd
File opened for modification	/tmp/notify.file	.sshd

/tmp/b75b09877672a416a18a65de4183c2a1_JaffaCakes118
/tmp/b75b09877672a416a18a65de4183c2a1_JaffaCakes118
1⤵
- Modifies init.d
- Reads system routing table
- Write file to user bin folder
- Checks CPU configuration
- Reads system network configuration
- Reads runtime system information
- Writes file to tmp directory
PID:1398
- /bin/sh
  sh -c "ln -s /etc/init.d/QsystemsshMmt /etc/rc1.d/S97QsystemsshMmt"
  2⤵
  PID:1445
- - /usr/bin/ln
    ln -s /etc/init.d/QsystemsshMmt /etc/rc1.d/S97QsystemsshMmt
    3⤵
    PID:1446
- /bin/sh
  sh -c "ln -s /etc/init.d/QsystemsshMmt /etc/rc2.d/S97QsystemsshMmt"
  2⤵
  PID:1447
- - /usr/bin/ln
    ln -s /etc/init.d/QsystemsshMmt /etc/rc2.d/S97QsystemsshMmt
    3⤵
    PID:1448
- /bin/sh
  sh -c "ln -s /etc/init.d/QsystemsshMmt /etc/rc3.d/S97QsystemsshMmt"
  2⤵
  PID:1449
- - /usr/bin/ln
    ln -s /etc/init.d/QsystemsshMmt /etc/rc3.d/S97QsystemsshMmt
    3⤵
    PID:1450
- /bin/sh
  sh -c "ln -s /etc/init.d/QsystemsshMmt /etc/rc4.d/S97QsystemsshMmt"
  2⤵
  PID:1451
- - /usr/bin/ln
    ln -s /etc/init.d/QsystemsshMmt /etc/rc4.d/S97QsystemsshMmt
    3⤵
    PID:1452
- /bin/sh
  sh -c "ln -s /etc/init.d/QsystemsshMmt /etc/rc5.d/S97QsystemsshMmt"
  2⤵
  PID:1453
- - /usr/bin/ln
    ln -s /etc/init.d/QsystemsshMmt /etc/rc5.d/S97QsystemsshMmt
    3⤵
    PID:1454
- /bin/sh
  sh -c "mkdir -p /usr/bin/bsd-port"
  2⤵
  PID:1455
- - /usr/bin/mkdir
    mkdir -p /usr/bin/bsd-port
    3⤵
    - Reads runtime system information
    PID:1456
- /bin/sh
  sh -c "cp -f /tmp/b75b09877672a416a18a65de4183c2a1_JaffaCakes118 /usr/bin/bsd-port/knerl"
  2⤵
  PID:1457
- - /usr/bin/cp
    cp -f /tmp/b75b09877672a416a18a65de4183c2a1_JaffaCakes118 /usr/bin/bsd-port/knerl
    3⤵
    - Write file to user bin folder
    - Reads runtime system information
    PID:1458
- /bin/sh
  sh -c /usr/bin/bsd-port/knerl
  2⤵
  PID:1460
- - /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:1461
  - - /bin/sh
      sh -c "ln -s /etc/init.d/selinux /etc/rc1.d/S99selinux"
      4⤵
      PID:1478
    - - /usr/bin/ln
        
        ln -s /etc/init.d/selinux /etc/rc1.d/S99selinux
        5⤵
        
        PID:1479
  - - /bin/sh
      sh -c "ln -s /etc/init.d/selinux /etc/rc2.d/S99selinux"
      4⤵
      PID:1480
    - - /usr/bin/ln
        
        ln -s /etc/init.d/selinux /etc/rc2.d/S99selinux
        5⤵
        
        PID:1481
  - - /bin/sh
      sh -c "ln -s /etc/init.d/selinux /etc/rc3.d/S99selinux"
      4⤵
      PID:1482
    - - /usr/bin/ln
        
        ln -s /etc/init.d/selinux /etc/rc3.d/S99selinux
        5⤵
        
        PID:1483
  - - /bin/sh
      sh -c "ln -s /etc/init.d/selinux /etc/rc4.d/S99selinux"
      4⤵
      PID:1485
    - - /usr/bin/ln
        
        ln -s /etc/init.d/selinux /etc/rc4.d/S99selinux
        5⤵
        
        PID:1486
  - - /bin/sh
      sh -c "ln -s /etc/init.d/selinux /etc/rc5.d/S99selinux"
      4⤵
      PID:1487
    - - /usr/bin/ln
        
        ln -s /etc/init.d/selinux /etc/rc5.d/S99selinux
        5⤵
        
        PID:1488
  - - /bin/sh
      sh -c "mkdir -p /usr/bin/dpkgd"
      4⤵
      PID:1489
    - - /usr/bin/mkdir
        
        mkdir -p /usr/bin/dpkgd
        5⤵
        Reads runtime system information
        
        PID:1490
  - - /bin/sh
      sh -c "cp -f /bin/lsof /usr/bin/dpkgd/lsof"
      4⤵
      PID:1491
    - - /usr/bin/cp
        
        cp -f /bin/lsof /usr/bin/dpkgd/lsof
        5⤵
        Write file to user bin folder
        Reads runtime system information
        
        PID:1492
  - - /bin/sh
      sh -c "mkdir -p /bin"
      4⤵
      PID:1494
    - - /usr/bin/mkdir
        
        mkdir -p /bin
        5⤵
        Reads runtime system information
        
        PID:1495
  - - /bin/sh
      sh -c "cp -f /usr/bin/bsd-port/knerl /bin/lsof"
      4⤵
      PID:1496
    - - /usr/bin/cp
        
        cp -f /usr/bin/bsd-port/knerl /bin/lsof
        5⤵
        Writes file to system bin folder
        Reads runtime system information
        
        PID:1497
  - - /bin/sh
      sh -c "chmod 0755 /bin/lsof"
      4⤵
      PID:1498
    - - /usr/bin/chmod
        
        chmod 0755 /bin/lsof
        5⤵
        
        PID:1499
  - - /bin/sh
      sh -c "cp -f /bin/ps /usr/bin/dpkgd/ps"
      4⤵
      PID:1500
    - - /usr/bin/cp
        
        cp -f /bin/ps /usr/bin/dpkgd/ps
        5⤵
        Write file to user bin folder
        Reads runtime system information
        
        PID:1502
  - - /bin/sh
      sh -c "mkdir -p /bin"
      4⤵
      PID:1503
    - - /usr/bin/mkdir
        
        mkdir -p /bin
        5⤵
        Reads runtime system information
        
        PID:1504
  - - /bin/sh
      sh -c "cp -f /usr/bin/bsd-port/knerl /bin/ps"
      4⤵
      PID:1505
    - - /usr/bin/cp
        
        cp -f /usr/bin/bsd-port/knerl /bin/ps
        5⤵
        Writes file to system bin folder
        Reads runtime system information
        
        PID:1506
  - - /bin/sh
      sh -c "chmod 0755 /bin/ps"
      4⤵
      PID:1507
    - - /usr/bin/chmod
        
        chmod 0755 /bin/ps
        5⤵
        
        PID:1508
  - - /bin/sh
      sh -c "mkdir -p /usr/bin"
      4⤵
      PID:1509
    - - /usr/bin/mkdir
        
        mkdir -p /usr/bin
        5⤵
        Reads runtime system information
        
        PID:1510
  - - /bin/sh
      sh -c "cp -f /usr/bin/bsd-port/knerl /usr/bin/lsof"
      4⤵
      PID:1511
    - - /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:1512
  - - /bin/sh
      sh -c "chmod 0755 /usr/bin/lsof"
      4⤵
      PID:1513
    - - /usr/bin/chmod
        
        chmod 0755 /usr/bin/lsof
        5⤵
        
        PID:1514
  - - /bin/sh
      sh -c "mkdir -p /usr/bin"
      4⤵
      PID:1515
    - - /usr/bin/mkdir
        
        mkdir -p /usr/bin
        5⤵
        Reads runtime system information
        
        PID:1516
  - - /bin/sh
      sh -c "cp -f /usr/bin/bsd-port/knerl /usr/bin/ps"
      4⤵
      PID:1517
    - - /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:1518
  - - /bin/sh
      sh -c "chmod 0755 /usr/bin/ps"
      4⤵
      PID:1519
    - - /usr/bin/chmod
        
        chmod 0755 /usr/bin/ps
        5⤵
        
        PID:1520
  - - /bin/sh
      sh -c "insmod /usr/lib/xpacket.ko"
      4⤵
      PID:1521
    - - /usr/sbin/insmod
        
        insmod /usr/lib/xpacket.ko
        5⤵
        Reads runtime system information
        
        PID:1522
- /bin/sh
  sh -c "mkdir -p /usr/bin"
  2⤵
  PID:1463
- - /usr/bin/mkdir
    mkdir -p /usr/bin
    3⤵
    - Reads runtime system information
    PID:1464
- /bin/sh
  sh -c "cp -f /tmp/b75b09877672a416a18a65de4183c2a1_JaffaCakes118 /usr/bin/.sshd"
  2⤵
  PID:1465
- - /usr/bin/cp
    cp -f /tmp/b75b09877672a416a18a65de4183c2a1_JaffaCakes118 /usr/bin/.sshd
    3⤵
    - Write file to user bin folder
    - Reads runtime system information
    PID:1466
- /bin/sh
  sh -c /usr/bin/.sshd
  2⤵
  PID:1468
- - /usr/bin/.sshd
    /usr/bin/.sshd
    3⤵
    - Executes dropped EXE
    - Reads runtime system information
    - Writes file to tmp directory
    PID:1469
- /bin/sh
  sh -c "insmod /usr/lib/xpacket.ko"
  2⤵
  PID:1472
- - /usr/sbin/insmod
    insmod /usr/lib/xpacket.ko
    3⤵
    - Reads runtime system information
    PID:1473

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

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Downloads

/etc/init.d/QsystemsshMmt

Filesize
64B

MD5
1d318074333fab099ffeb644349bb738

SHA1
03494cb7457c367c44b46007fde243722743de31

SHA256
64f9316476ebf0cb98181897bc1940581bac6b078feca464847fe450705746e6

SHA512
183cbaf6b6f770e9cca3443560a63ec9f11703e7ef5f7ea004c5407372f3a63d775e5dea2f5be745ce65a5fe0bb8f5110ce69329e7600a6dfed51ec7cbbb27ed

Download Submit
/etc/init.d/selinux

Filesize
36B

MD5
caa27b819c9303446f702929874a00e8

SHA1
d24199c0e376edea3f822b215148cc0dc78364bf

SHA256
da9b535a14c6d9152857e211f14fb8da9056e84ba1b8d4dc27ab79c98264050b

SHA512
dcd9413eb2cb24d77f637edfc00ca0bb42229a1a3b0d84e29eff94a7b91aee6ee8c126c286a4b4103e01834d1c6aec9de09ffab3927e8de8015421005f31446e

Download Submit
/tmp/Dest.cfg

Filesize
4B

MD5
602d1305678a8d5fdb372271e980da6a

SHA1
87b2eb969f96afe3b467215f279262e98c868d27

SHA256
3485da2e4aaa4c692d04e570406af48b512f13137ab9e57718753a7a9f7b6e1c

SHA512
dcdb6d1e88228353412b1a7973492d15d9a7d60e2042851981f9067198f592502538e18683a255e58ab137d49e6882b9171aa5c6b0201782efcbfa4b86f0b05d

Download Submit
/tmp/notify.file

Filesize
51B

MD5
6d962049a0b8928a72f3c6bfb9793884

SHA1
2edd0530043293290402b5bc8e421d5a235dfad2

SHA256
0643a5b80c307b5c375fb8a884ea7bcda672d61d28cadced1b8a38457306cc51

SHA512
cf09fcf2ac4226d843ee23d8cf75340adf17fac0ce5d21df09ba58be4428ed71af9595561b904292d14a5187f1467313ac47fef7f763bea8e71dcdd2e4639a63

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

Filesize
1.1MB

MD5
b75b09877672a416a18a65de4183c2a1

SHA1
165c14b37464e5212b4e580804198c7c7c603041

SHA256
7b9adbfa310a061e4d4becad8fb32260da09563bf0b1477267329a131c5b48c8

SHA512
75886f0807a4da826ab4dfd43d19b315c3628056292b89a6f62290a78937bb371864eafccdf98009f19f49c1664bdfdf412a6c52f2066dc8493eb76e4a5d186a

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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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads