mrblack | 6ebf51d169240f1c233aaf49da07005eca3529ae4c9b19b9de78f906ad7527a6

Analysis

max time kernel
149s
max time network
150s
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
29-07-2024 06:49

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General

Target

3b580fa241f0f73f885ad9b364bef5e7_JaffaCakes118
Size

1.1MB
MD5

3b580fa241f0f73f885ad9b364bef5e7
SHA1

08534ff1a88547dd76c1948257ab7c78c2b7ab7e
SHA256

6ebf51d169240f1c233aaf49da07005eca3529ae4c9b19b9de78f906ad7527a6
SHA512

732b628b52e25eafc4f59b7372b8c9a258366b97d50385e64231a6616a61465581213ee02e9c3ac6284022e589e110dd3e3c16d9dd0572e64430bd9d5acb6477
SSDEEP

24576:4vRE7caCfKGPqVEDNLFxKsfayI+gIGYuuCol7r:4vREKfPqVE5jKsfayRHGVo7r

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	1533	knerl
/usr/bin/pythno	1541	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	3b580fa241f0f73f885ad9b364bef5e7_JaffaCakes118
File opened for modification	/etc/init.d/selinux	knerl

Write file to user bin folder 1 TTPs 9 IoCs

Hijack Execution Flow

T1574

description	ioc	Process
File opened for modification	/usr/bin/lsof	cp
File opened for modification	/usr/bin/ps	cp
File opened for modification	/usr/bin/bsd-port/knerl.conf	3b580fa241f0f73f885ad9b364bef5e7_JaffaCakes118
File opened for modification	/usr/bin/bsd-port/udevd.conf	3b580fa241f0f73f885ad9b364bef5e7_JaffaCakes118
File opened for modification	/usr/bin/bsd-port/knerl.conf	knerl
File opened for modification	/usr/bin/dpkgd/ps	cp
File opened for modification	/usr/bin/bsd-port/knerl	cp
File opened for modification	/usr/bin/pythno	cp
File opened for modification	/usr/bin/dpkgd/lsof	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	3b580fa241f0f73f885ad9b364bef5e7_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	knerl
File opened for reading	/proc/net/dev	3b580fa241f0f73f885ad9b364bef5e7_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	cp
File opened for reading	/proc/meminfo	knerl
File opened for reading	/proc/cmdline	insmod
File opened for reading	/proc/meminfo	3b580fa241f0f73f885ad9b364bef5e7_JaffaCakes118
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	cp
File opened for reading	/proc/filesystems	mkdir
File opened for reading	/proc/filesystems	cp
File opened for reading	/proc/sys/kernel/version	3b580fa241f0f73f885ad9b364bef5e7_JaffaCakes118
File opened for reading	/proc/filesystems	mkdir
File opened for reading	/proc/filesystems	mkdir
File opened for reading	/proc/stat	3b580fa241f0f73f885ad9b364bef5e7_JaffaCakes118
File opened for reading	/proc/filesystems	cp
File opened for reading	/proc/sys/kernel/version	knerl
File opened for reading	/proc/filesystems	cp
File opened for reading	/proc/sys/kernel/version	pythno
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

Writes file to tmp directory 7 IoCs

Malware often drops required files in the /tmp directory.

description	ioc	Process
File opened for modification	/tmp/vga.conf	pythno
File opened for modification	/tmp/idus.log	3b580fa241f0f73f885ad9b364bef5e7_JaffaCakes118
File opened for modification	/tmp/apsh.conf	3b580fa241f0f73f885ad9b364bef5e7_JaffaCakes118
File opened for modification	/tmp/vga.conf	3b580fa241f0f73f885ad9b364bef5e7_JaffaCakes118
File opened for modification	/tmp/notify.file	3b580fa241f0f73f885ad9b364bef5e7_JaffaCakes118
File opened for modification	/tmp/idus.log	pythno
File opened for modification	/tmp/notify.file	pythno

/tmp/3b580fa241f0f73f885ad9b364bef5e7_JaffaCakes118
/tmp/3b580fa241f0f73f885ad9b364bef5e7_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/VsystemsshMdt /etc/rc1.d/S97VsystemsshMdt"
  2⤵
  PID:1517
- - /usr/bin/ln
    ln -s /etc/init.d/VsystemsshMdt /etc/rc1.d/S97VsystemsshMdt
    3⤵
    PID:1518
- /bin/sh
  sh -c "ln -s /etc/init.d/VsystemsshMdt /etc/rc2.d/S97VsystemsshMdt"
  2⤵
  PID:1519
- - /usr/bin/ln
    ln -s /etc/init.d/VsystemsshMdt /etc/rc2.d/S97VsystemsshMdt
    3⤵
    PID:1520
- /bin/sh
  sh -c "ln -s /etc/init.d/VsystemsshMdt /etc/rc3.d/S97VsystemsshMdt"
  2⤵
  PID:1521
- - /usr/bin/ln
    ln -s /etc/init.d/VsystemsshMdt /etc/rc3.d/S97VsystemsshMdt
    3⤵
    PID:1522
- /bin/sh
  sh -c "ln -s /etc/init.d/VsystemsshMdt /etc/rc4.d/S97VsystemsshMdt"
  2⤵
  PID:1523
- - /usr/bin/ln
    ln -s /etc/init.d/VsystemsshMdt /etc/rc4.d/S97VsystemsshMdt
    3⤵
    PID:1524
- /bin/sh
  sh -c "ln -s /etc/init.d/VsystemsshMdt /etc/rc5.d/S97VsystemsshMdt"
  2⤵
  PID:1525
- - /usr/bin/ln
    ln -s /etc/init.d/VsystemsshMdt /etc/rc5.d/S97VsystemsshMdt
    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/3b580fa241f0f73f885ad9b364bef5e7_JaffaCakes118 /usr/bin/bsd-port/knerl"
  2⤵
  PID:1529
- - /usr/bin/cp
    cp -f /tmp/3b580fa241f0f73f885ad9b364bef5e7_JaffaCakes118 /usr/bin/bsd-port/knerl
    3⤵
    - Write file to user bin folder
    - Reads runtime system information
    PID:1530
- /bin/sh
  sh -c /usr/bin/bsd-port/knerl
  2⤵
  PID:1532
- - /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: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:1561
    - - /usr/bin/cp
        
        cp -f /bin/lsof /usr/bin/dpkgd/lsof
        5⤵
        Write file to user bin folder
        Reads runtime system information
        
        PID:1562
  - - /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/knerl /bin/lsof"
      4⤵
      PID:1566
    - - /usr/bin/cp
        
        cp -f /usr/bin/bsd-port/knerl /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:1568
    - - /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/knerl /bin/ps"
      4⤵
      PID:1575
    - - /usr/bin/cp
        
        cp -f /usr/bin/bsd-port/knerl /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/knerl /usr/bin/lsof"
      4⤵
      PID:1582
    - - /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:1583
  - - /bin/sh
      sh -c "chmod 0755 /usr/bin/lsof"
      4⤵
      PID:1585
    - - /usr/bin/chmod
        
        chmod 0755 /usr/bin/lsof
        5⤵
        
        PID:1586
  - - /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/knerl /usr/bin/ps"
      4⤵
      PID:1589
    - - /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: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/3b580fa241f0f73f885ad9b364bef5e7_JaffaCakes118 /usr/bin/pythno"
  2⤵
  PID:1537
- - /usr/bin/cp
    cp -f /tmp/3b580fa241f0f73f885ad9b364bef5e7_JaffaCakes118 /usr/bin/pythno
    3⤵
    - Write file to user bin folder
    - Reads runtime system information
    PID:1538
- /bin/sh
  sh -c /usr/bin/pythno
  2⤵
  PID:1540
- - /usr/bin/pythno
    /usr/bin/pythno
    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/VsystemsshMdt

Filesize
64B

MD5
eaf7f00243ae8e914ca25faaac8e64e6

SHA1
c959c5d9b5af45d716db5852616a534485119c21

SHA256
cbe49acffd3b8946ccc627946f4be3d6babddfdcfc2ba8290d44cd357e1746e8

SHA512
ea8967cfc944dcfdf7aded296d53eff53b7e16d566ffe98a96c057d6c3037c17f24063201a4ca36916ef948126b88f62344e229d7473d9bbd7a71c9c2fae5b68

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/etc/init.d/selinux

Filesize
36B

MD5
caa27b819c9303446f702929874a00e8

SHA1
d24199c0e376edea3f822b215148cc0dc78364bf

SHA256
da9b535a14c6d9152857e211f14fb8da9056e84ba1b8d4dc27ab79c98264050b

SHA512
dcd9413eb2cb24d77f637edfc00ca0bb42229a1a3b0d84e29eff94a7b91aee6ee8c126c286a4b4103e01834d1c6aec9de09ffab3927e8de8015421005f31446e

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/tmp/idus.log

Filesize
4B

MD5
d010396ca8abf6ead8cacc2c2f2f26c7

SHA1
731df0fc93417f72fcb56f09cd754f9382ae6373

SHA256
596d0c702ba6d20835982c87a878f97d07a163285a0a3ee98c6e7a8e0459a8cb

SHA512
843da40f223209d8e90012e1a35004387636ffcb23cce0602a3964055ed790d271e5fd274351b8dd3afc4200e0a9d28811f7a0987f44d813e4257f10dedabeba

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/tmp/notify.file

Filesize
51B

MD5
c9d0e03ca64d2dff31e95d5326ad3cee

SHA1
d549e413dbda3b9cc253239a63b29bddf0727e3a

SHA256
08cf126bf7478721540a797b54ed77f1c9da296da1ee71c31dd1052718c21bab

SHA512
72db10bbe422f7630d0d917e9101ecbf59adae7d93599bc90b14700f0b3e5916b1fb4206f030a9fd6145b6f375ba2006e586dadc752168be4b3a5aaa3675ef66

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/tmp/vga.conf

Filesize
4B

MD5
0f3d014eead934bbdbacb62a01dc4831

SHA1
443233bf934850484d12f21d9603a36ee83d1dfb

SHA256
66c03337b22c301d55a339a94165dc09628491c3dfe01a57ef62e3eab452e898

SHA512
30e3cef49700596aa4b725177f0fca3f38355d0c45a445c6d176e9e3a4ecf4ca7bdde2a3dfaceb9f67b74bc145bb816bf3daad9414080bcb859c62de097e4b9b

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

Filesize
1.1MB

MD5
3b580fa241f0f73f885ad9b364bef5e7

SHA1
08534ff1a88547dd76c1948257ab7c78c2b7ab7e

SHA256
6ebf51d169240f1c233aaf49da07005eca3529ae4c9b19b9de78f906ad7527a6

SHA512
732b628b52e25eafc4f59b7372b8c9a258366b97d50385e64231a6616a61465581213ee02e9c3ac6284022e589e110dd3e3c16d9dd0572e64430bd9d5acb6477

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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