mrblack | 75a39283e00fdd65813efd892522b77c655b920b32637b0c7106a0340d1a97cf

Analysis

max time kernel
149s
max time network
128s
platform
ubuntu-18.04_amd64
resource
ubuntu1804-amd64-20240729-en
resource tags

arch:amd64arch:i386image:ubuntu1804-amd64-20240729-enkernel:4.15.0-213-genericlocale:en-usos:ubuntu-18.04-amd64system
submitted
29-07-2024 05:29

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

39a708f0997751f152ecb7690a77dddd_JaffaCakes118
Size

1.1MB
MD5

39a708f0997751f152ecb7690a77dddd
SHA1

8d9b4d82b1cbff29b83c5ad13d64dac197fcf7a5
SHA256

75a39283e00fdd65813efd892522b77c655b920b32637b0c7106a0340d1a97cf
SHA512

75a1d0cc16b2f0023f4c61ed53060fa8c249bbe346a98f3cbdc90e0442172184b48d820866e8223b6be6f23d6d26f4c9435938afa4a88af03e1e71c657f62eef
SSDEEP

24576:4vRE7caCfKGPqVEDNLFxKsfaCI+gIGYuuCol7r:4vREKfPqVE5jKsfaCRHGVo7r

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	1539	knerl
/usr/bin/pythno	1547	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/VsystemsshMdt	39a708f0997751f152ecb7690a77dddd_JaffaCakes118
File opened for modification	/etc/init.d/selinux	knerl

Write file to user bin folder 1 TTPs 8 IoCs

Hijack Execution Flow

T1574

description	ioc	Process
File opened for modification	/usr/bin/dpkgd/ps	cp
File opened for modification	/usr/bin/dpkgd/lsof	cp
File opened for modification	/usr/bin/lsof	cp
File opened for modification	/usr/bin/bsd-port/knerl.conf	39a708f0997751f152ecb7690a77dddd_JaffaCakes118
File opened for modification	/usr/bin/bsd-port/udevd.conf	39a708f0997751f152ecb7690a77dddd_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

Writes file to system bin folder 1 TTPs 1 IoCs

Hijack Execution Flow

T1574

description	ioc	Process
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	39a708f0997751f152ecb7690a77dddd_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	39a708f0997751f152ecb7690a77dddd_JaffaCakes118
File opened for reading	/proc/net/dev	knerl

Reads runtime system information 17 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	mkdir
File opened for reading	/proc/filesystems	cp
File opened for reading	/proc/filesystems	cp
File opened for reading	/proc/meminfo	knerl
File opened for reading	/proc/stat	39a708f0997751f152ecb7690a77dddd_JaffaCakes118
File opened for reading	/proc/cmdline	insmod
File opened for reading	/proc/meminfo	39a708f0997751f152ecb7690a77dddd_JaffaCakes118
File opened for reading	/proc/filesystems	cp
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/stat	knerl
File opened for reading	/proc/filesystems	cp
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/idus.log	pythno
File opened for modification	/tmp/notify.file	pythno
File opened for modification	/tmp/vga.conf	pythno
File opened for modification	/tmp/idus.log	39a708f0997751f152ecb7690a77dddd_JaffaCakes118
File opened for modification	/tmp/apsh.conf	39a708f0997751f152ecb7690a77dddd_JaffaCakes118
File opened for modification	/tmp/vga.conf	39a708f0997751f152ecb7690a77dddd_JaffaCakes118
File opened for modification	/tmp/notify.file	39a708f0997751f152ecb7690a77dddd_JaffaCakes118

/tmp/39a708f0997751f152ecb7690a77dddd_JaffaCakes118
/tmp/39a708f0997751f152ecb7690a77dddd_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:1517
- /bin/sh
  sh -c "ln -s /etc/init.d/VsystemsshMdt /etc/rc1.d/S97VsystemsshMdt"
  2⤵
  PID:1523
- - /bin/ln
    ln -s /etc/init.d/VsystemsshMdt /etc/rc1.d/S97VsystemsshMdt
    3⤵
    PID:1524
- /bin/sh
  sh -c "ln -s /etc/init.d/VsystemsshMdt /etc/rc2.d/S97VsystemsshMdt"
  2⤵
  PID:1525
- - /bin/ln
    ln -s /etc/init.d/VsystemsshMdt /etc/rc2.d/S97VsystemsshMdt
    3⤵
    PID:1526
- /bin/sh
  sh -c "ln -s /etc/init.d/VsystemsshMdt /etc/rc3.d/S97VsystemsshMdt"
  2⤵
  PID:1527
- - /bin/ln
    ln -s /etc/init.d/VsystemsshMdt /etc/rc3.d/S97VsystemsshMdt
    3⤵
    PID:1528
- /bin/sh
  sh -c "ln -s /etc/init.d/VsystemsshMdt /etc/rc4.d/S97VsystemsshMdt"
  2⤵
  PID:1529
- - /bin/ln
    ln -s /etc/init.d/VsystemsshMdt /etc/rc4.d/S97VsystemsshMdt
    3⤵
    PID:1530
- /bin/sh
  sh -c "ln -s /etc/init.d/VsystemsshMdt /etc/rc5.d/S97VsystemsshMdt"
  2⤵
  PID:1531
- - /bin/ln
    ln -s /etc/init.d/VsystemsshMdt /etc/rc5.d/S97VsystemsshMdt
    3⤵
    PID:1532
- /bin/sh
  sh -c "mkdir -p /usr/bin/bsd-port"
  2⤵
  PID:1533
- - /bin/mkdir
    mkdir -p /usr/bin/bsd-port
    3⤵
    - Reads runtime system information
    PID:1534
- /bin/sh
  sh -c "cp -f /tmp/39a708f0997751f152ecb7690a77dddd_JaffaCakes118 /usr/bin/bsd-port/knerl"
  2⤵
  PID:1535
- - /bin/cp
    cp -f /tmp/39a708f0997751f152ecb7690a77dddd_JaffaCakes118 /usr/bin/bsd-port/knerl
    3⤵
    - Write file to user bin folder
    - Reads runtime system information
    PID:1536
- /bin/sh
  sh -c /usr/bin/bsd-port/knerl
  2⤵
  PID:1538
- - /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:1539
  - - /bin/sh
      sh -c "ln -s /etc/init.d/selinux /etc/rc1.d/S99selinux"
      4⤵
      PID:1554
    - - /bin/ln
        
        ln -s /etc/init.d/selinux /etc/rc1.d/S99selinux
        5⤵
        
        PID:1555
  - - /bin/sh
      sh -c "ln -s /etc/init.d/selinux /etc/rc2.d/S99selinux"
      4⤵
      PID:1556
    - - /bin/ln
        
        ln -s /etc/init.d/selinux /etc/rc2.d/S99selinux
        5⤵
        
        PID:1557
  - - /bin/sh
      sh -c "ln -s /etc/init.d/selinux /etc/rc3.d/S99selinux"
      4⤵
      PID:1558
    - - /bin/ln
        
        ln -s /etc/init.d/selinux /etc/rc3.d/S99selinux
        5⤵
        
        PID:1559
  - - /bin/sh
      sh -c "ln -s /etc/init.d/selinux /etc/rc4.d/S99selinux"
      4⤵
      PID:1560
    - - /bin/ln
        
        ln -s /etc/init.d/selinux /etc/rc4.d/S99selinux
        5⤵
        
        PID:1561
  - - /bin/sh
      sh -c "ln -s /etc/init.d/selinux /etc/rc5.d/S99selinux"
      4⤵
      PID:1562
    - - /bin/ln
        
        ln -s /etc/init.d/selinux /etc/rc5.d/S99selinux
        5⤵
        
        PID:1563
  - - /bin/sh
      sh -c "mkdir -p /usr/bin/dpkgd"
      4⤵
      PID:1564
    - - /bin/mkdir
        
        mkdir -p /usr/bin/dpkgd
        5⤵
        Reads runtime system information
        
        PID:1565
  - - /bin/sh
      sh -c "cp -f /bin/ps /usr/bin/dpkgd/ps"
      4⤵
      PID:1566
    - - /bin/cp
        
        cp -f /bin/ps /usr/bin/dpkgd/ps
        5⤵
        Write file to user bin folder
        Reads runtime system information
        
        PID:1567
  - - /bin/sh
      sh -c "mkdir -p /bin"
      4⤵
      PID:1568
    - - /bin/mkdir
        
        mkdir -p /bin
        5⤵
        Reads runtime system information
        
        PID:1569
  - - /bin/sh
      sh -c "cp -f /usr/bin/bsd-port/knerl /bin/ps"
      4⤵
      PID:1570
    - - /bin/cp
        
        cp -f /usr/bin/bsd-port/knerl /bin/ps
        5⤵
        Writes file to system bin folder
        Reads runtime system information
        
        PID:1571
  - - /bin/sh
      sh -c "chmod 0755 /bin/ps"
      4⤵
      PID:1573
    - - /bin/chmod
        
        chmod 0755 /bin/ps
        5⤵
        
        PID:1574
  - - /bin/sh
      sh -c "cp -f /usr/bin/lsof /usr/bin/dpkgd/lsof"
      4⤵
      PID:1575
    - - /bin/cp
        
        cp -f /usr/bin/lsof /usr/bin/dpkgd/lsof
        5⤵
        Write file to user bin folder
        Reads runtime system information
        
        PID:1576
  - - /bin/sh
      sh -c "mkdir -p /usr/bin"
      4⤵
      PID:1577
    - - /bin/mkdir
        
        mkdir -p /usr/bin
        5⤵
        Reads runtime system information
        
        PID:1578
  - - /bin/sh
      sh -c "cp -f /usr/bin/bsd-port/knerl /usr/bin/lsof"
      4⤵
      PID:1579
    - - /bin/cp
        
        cp -f /usr/bin/bsd-port/knerl /usr/bin/lsof
        5⤵
        Write file to user bin folder
        Reads runtime system information
        
        PID:1580
  - - /bin/sh
      sh -c "chmod 0755 /usr/bin/lsof"
      4⤵
      PID:1581
    - - /bin/chmod
        
        chmod 0755 /usr/bin/lsof
        5⤵
        
        PID:1582
  - - /bin/sh
      sh -c "insmod /usr/lib/xpacket.ko"
      4⤵
      PID:1583
    - - /sbin/insmod
        
        insmod /usr/lib/xpacket.ko
        5⤵
        Reads runtime system information
        
        PID:1584
- /bin/sh
  sh -c "mkdir -p /usr/bin"
  2⤵
  PID:1541
- - /bin/mkdir
    mkdir -p /usr/bin
    3⤵
    - Reads runtime system information
    PID:1542
- /bin/sh
  sh -c "cp -f /tmp/39a708f0997751f152ecb7690a77dddd_JaffaCakes118 /usr/bin/pythno"
  2⤵
  PID:1543
- - /bin/cp
    cp -f /tmp/39a708f0997751f152ecb7690a77dddd_JaffaCakes118 /usr/bin/pythno
    3⤵
    - Write file to user bin folder
    - Reads runtime system information
    PID:1544
- /bin/sh
  sh -c /usr/bin/pythno
  2⤵
  PID:1546
- - /usr/bin/pythno
    /usr/bin/pythno
    3⤵
    - Executes dropped EXE
    - Writes file to tmp directory
    PID:1547
- /bin/sh
  sh -c "insmod /usr/lib/xpacket.ko"
  2⤵
  PID:1549
- - /sbin/insmod
    insmod /usr/lib/xpacket.ko
    3⤵
    - Reads runtime system information
    PID:1550

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

Loading Replay Monitor...

Downloads

/etc/init.d/VsystemsshMdt

Filesize
64B

MD5
7f9e7c206ac973ea5b4ec6ceabb6374d

SHA1
c85ae76d48ee9dcf28835c293d6743992ea1d413

SHA256
744ba81ebc76dba09791db6cebd20bd737c8b2bc0d77f01823865de34c4370a5

SHA512
a376f1e64c0a11894abd7a813e00f6edd269fc5c1ccdb2d0d908e98ba085ef8239b06c85762b72521afb5d4408e2b8bd9dace1dad27c3c1edffd573785aaeefb

Download Submit
/etc/init.d/selinux

Filesize
36B

MD5
caa27b819c9303446f702929874a00e8

SHA1
d24199c0e376edea3f822b215148cc0dc78364bf

SHA256
da9b535a14c6d9152857e211f14fb8da9056e84ba1b8d4dc27ab79c98264050b

SHA512
dcd9413eb2cb24d77f637edfc00ca0bb42229a1a3b0d84e29eff94a7b91aee6ee8c126c286a4b4103e01834d1c6aec9de09ffab3927e8de8015421005f31446e

Download Submit
/tmp/idus.log

Filesize
4B

MD5
35464c848f410e55a13bb9d78e7fddd0

SHA1
a575bcefdc7a11dec7302ce66652db242e7931ea

SHA256
48f31b127dde9f650b07d6d68488d734ed95687cbcfb2d06867d21ad0997f438

SHA512
1d0d7db8e07f74deab2c3b47c8bc683145a0a8ed486c65c19f0e43a62f283d69ff4ad586802d96b866ac836d0ff925b0e8de8e485c95473d044cec04edfede18

Download Submit
/tmp/notify.file

Filesize
51B

MD5
2b00e9b6e7109e0aea56f7f3c54bc5bb

SHA1
039de114e7b8b9fa5ed51863a4937620a85042f6

SHA256
deb529fece344849c0d1a442988197224c5f31b088b969f1711b9d8a432681a2

SHA512
73fbbe17e569ad89f6109992abcc4233b5c198f3b2837f25139580b3d920f810713c435bada22ff3dd100ccab6d781671d984ec04c800e8ce1d35bbf28821782

Download Submit
/tmp/vga.conf

Filesize
4B

MD5
42d6c7d61481d1c21bd1635f59edae05

SHA1
c8ec393b52a33555bfca80d15909f59f2d09d0cb

SHA256
1eb3da012cf952c58269bd949984611b7884583f20bac1322719580757161e98

SHA512
2dd37bd778240f4e9e22b64e56dba9f9f6917efbb166d529a6ab09e74b3b9ce5b096aaaec3288b6129a3e07e630d53458bd2571ab199935a4b7efc60bf4cb27d

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

Filesize
1.1MB

MD5
39a708f0997751f152ecb7690a77dddd

SHA1
8d9b4d82b1cbff29b83c5ad13d64dac197fcf7a5

SHA256
75a39283e00fdd65813efd892522b77c655b920b32637b0c7106a0340d1a97cf

SHA512
75a1d0cc16b2f0023f4c61ed53060fa8c249bbe346a98f3cbdc90e0442172184b48d820866e8223b6be6f23d6d26f4c9435938afa4a88af03e1e71c657f62eef

Download Submit
/usr/bin/dpkgd/lsof

Filesize
159KB

MD5
e093dc78225e2a0a25e3b137c1c1e442

SHA1
c29497cfaae729eb576875e4fdfa400640ab16be

SHA256
1190f4dbc7be174de8fd4096c9bf7a28eebfac937d308b7cc533be4a1240d26e

SHA512
fe1cc7a65327732eaaee89f427c10239ba822430e34177842f4681068d78d404b1830d808a2a71b1efcc5f126c6d8c053512237421173aaa150e215a672da6f0

Download Submit
/usr/bin/dpkgd/ps

Filesize
130KB

MD5
558edc26f8a38fa9788220b9af8a73e7

SHA1
3024d44e580e9c67f32f6c585d50e2a6cc9a7cac

SHA256
b76435c80333d2c1fd18e0e7682f1c9dfb5da8d507e93e3c416f54b481c428d5

SHA512
edaa425b441044f015e8f68fffa1664e42372d00dd0e7b0924d24ce947aa8e5f96b3bdc326fa2f8b978e3fcf638a1ceca45a223735db73f1607df66990feb56f

Download Submit

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads