mrblack | a7d548bcb9a58a58b5dfb9f059b302131fc0107a094f1fbb53c7d525b9327b60

Analysis

max time kernel
149s
max time network
128s
platform
ubuntu-18.04_amd64
resource
ubuntu1804-amd64-20240226-en
resource tags

arch:amd64arch:i386image:ubuntu1804-amd64-20240226-enkernel:4.15.0-213-genericlocale:en-usos:ubuntu-18.04-amd64system
submitted
04-05-2024 10:10

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General

Target

f57f99f56834d73211bac97f4ec2dc5c
Size

1.1MB
MD5

f57f99f56834d73211bac97f4ec2dc5c
SHA1

314fff2c301fb120ce100e812e3ef4b31580551d
SHA256

a7d548bcb9a58a58b5dfb9f059b302131fc0107a094f1fbb53c7d525b9327b60
SHA512

c2785a0b3231ccd5c217f6ec38aa8ca3ece2cc3a3364a3271582ba49cf9ac8a5dfd163765c6284ba72c9bd4e711cc059ba328e6a7ad0b1adeb7e85447b9350a8
SSDEEP

24576:4vRE7caCfKGPqVEDNLFxKsfa1I+gIGYuuCol7r:4vREKfPqVE5jKsfa1RHGVo7r

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

Processes:

resource	yara_rule
/usr/bin/bsd-port/recei	family_mrblack

Executes dropped EXE 2 IoCs

Processes:

receioracle

ioc pid process

/usr/bin/bsd-port/recei 1567 recei
/usr/bin/oracle 1589 oracle

ioc	pid	process
/usr/bin/bsd-port/recei	1567	recei
/usr/bin/oracle	1589	oracle

Modifies init.d 1 TTPs 2 IoCs

Adds/modifies system service, likely for persistence.

persistence

Boot or Logon Autostart Execution

T1547

Processes:

f57f99f56834d73211bac97f4ec2dc5crecei

description	ioc	process
File opened for modification	/etc/init.d/VsystemsshMmt	f57f99f56834d73211bac97f4ec2dc5c
File opened for modification	/etc/init.d/selinux	recei

Reads system routing table 1 TTPs 1 IoCs
Gets active network interfaces from /proc virtual filesystem.

System Network Configuration Discovery
T1016

Processes:

f57f99f56834d73211bac97f4ec2dc5c

description ioc process

File opened for reading /proc/net/route f57f99f56834d73211bac97f4ec2dc5c

description	ioc	process
File opened for reading	/proc/net/route	f57f99f56834d73211bac97f4ec2dc5c

Write file to user bin folder 1 TTPs 8 IoCs

Hijack Execution Flow

T1574

Processes:

f57f99f56834d73211bac97f4ec2dc5ccpreceicpcpcpcp

description	ioc	process
File opened for modification	/usr/bin/bsd-port/udevd.conf	f57f99f56834d73211bac97f4ec2dc5c
File opened for modification	/usr/bin/bsd-port/recei	cp
File opened for modification	/usr/bin/bsd-port/recei.conf	recei
File opened for modification	/usr/bin/oracle	cp
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/recei.conf	f57f99f56834d73211bac97f4ec2dc5c

Writes file to system bin folder 1 TTPs 1 IoCs

Hijack Execution Flow
T1574

Processes:

cp

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

Processes:

f57f99f56834d73211bac97f4ec2dc5crecei

description ioc process

File opened for reading /proc/cpuinfo f57f99f56834d73211bac97f4ec2dc5c
File opened for reading /proc/cpuinfo recei

description	ioc	process
File opened for modification	/bin/ps	cp

description	ioc	process
File opened for reading	/proc/cpuinfo	f57f99f56834d73211bac97f4ec2dc5c
File opened for reading	/proc/cpuinfo	recei

Reads system network configuration 1 TTPs 4 IoCs

Uses contents of /proc filesystem to enumerate network settings.

System Network Configuration Discovery

T1016

Processes:

f57f99f56834d73211bac97f4ec2dc5crecei

description	ioc	process
File opened for reading	/proc/net/arp	f57f99f56834d73211bac97f4ec2dc5c
File opened for reading	/proc/net/dev	f57f99f56834d73211bac97f4ec2dc5c
File opened for reading	/proc/net/dev	recei
File opened for reading	/proc/net/route	f57f99f56834d73211bac97f4ec2dc5c

Reads runtime system information 17 IoCs

Reads data from /proc virtual filesystem.

Processes:

mkdircpmkdirreceif57f99f56834d73211bac97f4ec2dc5ccpinsmodmkdircpmkdircpcpinsmodmkdircp

description	ioc	process
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/stat	recei
File opened for reading	/proc/stat	f57f99f56834d73211bac97f4ec2dc5c
File opened for reading	/proc/filesystems	cp
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/meminfo	recei
File opened for reading	/proc/filesystems	mkdir
File opened for reading	/proc/meminfo	f57f99f56834d73211bac97f4ec2dc5c
File opened for reading	/proc/filesystems	cp
File opened for reading	/proc/filesystems	cp
File opened for reading	/proc/cmdline	insmod
File opened for reading	/proc/filesystems	mkdir
File opened for reading	/proc/filesystems	cp

Writes file to tmp directory 8 IoCs

Malware often drops required files in the /tmp directory.

Processes:

f57f99f56834d73211bac97f4ec2dc5coracle

description	ioc	process
File opened for modification	/tmp/appd.conf	f57f99f56834d73211bac97f4ec2dc5c
File opened for modification	/tmp/Dest.cfg	f57f99f56834d73211bac97f4ec2dc5c
File opened for modification	/tmp/notify.file	f57f99f56834d73211bac97f4ec2dc5c
File opened for modification	/tmp/conf.n	f57f99f56834d73211bac97f4ec2dc5c
File opened for modification	/tmp/appd.log	oracle
File opened for modification	/tmp/notify.file	oracle
File opened for modification	/tmp/Dest.cfg	oracle
File opened for modification	/tmp/appd.log	f57f99f56834d73211bac97f4ec2dc5c

/tmp/f57f99f56834d73211bac97f4ec2dc5c
/tmp/f57f99f56834d73211bac97f4ec2dc5c
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:1536
- /bin/sh
  sh -c "ln -s /etc/init.d/VsystemsshMmt /etc/rc1.d/S97VsystemsshMmt"
  2⤵
  PID:1551
- - /bin/ln
    ln -s /etc/init.d/VsystemsshMmt /etc/rc1.d/S97VsystemsshMmt
    3⤵
    PID:1552
- /bin/sh
  sh -c "ln -s /etc/init.d/VsystemsshMmt /etc/rc2.d/S97VsystemsshMmt"
  2⤵
  PID:1553
- - /bin/ln
    ln -s /etc/init.d/VsystemsshMmt /etc/rc2.d/S97VsystemsshMmt
    3⤵
    PID:1554
- /bin/sh
  sh -c "ln -s /etc/init.d/VsystemsshMmt /etc/rc3.d/S97VsystemsshMmt"
  2⤵
  PID:1555
- - /bin/ln
    ln -s /etc/init.d/VsystemsshMmt /etc/rc3.d/S97VsystemsshMmt
    3⤵
    PID:1556
- /bin/sh
  sh -c "ln -s /etc/init.d/VsystemsshMmt /etc/rc4.d/S97VsystemsshMmt"
  2⤵
  PID:1557
- - /bin/ln
    ln -s /etc/init.d/VsystemsshMmt /etc/rc4.d/S97VsystemsshMmt
    3⤵
    PID:1558
- /bin/sh
  sh -c "ln -s /etc/init.d/VsystemsshMmt /etc/rc5.d/S97VsystemsshMmt"
  2⤵
  PID:1559
- - /bin/ln
    ln -s /etc/init.d/VsystemsshMmt /etc/rc5.d/S97VsystemsshMmt
    3⤵
    PID:1560
- /bin/sh
  sh -c "mkdir -p /usr/bin/bsd-port"
  2⤵
  PID:1561
- - /bin/mkdir
    mkdir -p /usr/bin/bsd-port
    3⤵
    - Reads runtime system information
    PID:1562
- /bin/sh
  sh -c "cp -f /tmp/f57f99f56834d73211bac97f4ec2dc5c /usr/bin/bsd-port/recei"
  2⤵
  PID:1563
- - /bin/cp
    cp -f /tmp/f57f99f56834d73211bac97f4ec2dc5c /usr/bin/bsd-port/recei
    3⤵
    - Write file to user bin folder
    - Reads runtime system information
    PID:1564
- /bin/sh
  sh -c /usr/bin/bsd-port/recei
  2⤵
  PID:1566
- - /usr/bin/bsd-port/recei
    /usr/bin/bsd-port/recei
    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:1567
  - - /bin/sh
      sh -c "ln -s /etc/init.d/selinux /etc/rc1.d/S99selinux"
      4⤵
      PID:1573
    - - /bin/ln
        
        ln -s /etc/init.d/selinux /etc/rc1.d/S99selinux
        5⤵
        
        PID:1574
  - - /bin/sh
      sh -c "ln -s /etc/init.d/selinux /etc/rc2.d/S99selinux"
      4⤵
      PID:1575
    - - /bin/ln
        
        ln -s /etc/init.d/selinux /etc/rc2.d/S99selinux
        5⤵
        
        PID:1576
  - - /bin/sh
      sh -c "ln -s /etc/init.d/selinux /etc/rc3.d/S99selinux"
      4⤵
      PID:1577
    - - /bin/ln
        
        ln -s /etc/init.d/selinux /etc/rc3.d/S99selinux
        5⤵
        
        PID:1578
  - - /bin/sh
      sh -c "ln -s /etc/init.d/selinux /etc/rc4.d/S99selinux"
      4⤵
      PID:1579
    - - /bin/ln
        
        ln -s /etc/init.d/selinux /etc/rc4.d/S99selinux
        5⤵
        
        PID:1580
  - - /bin/sh
      sh -c "ln -s /etc/init.d/selinux /etc/rc5.d/S99selinux"
      4⤵
      PID:1581
    - - /bin/ln
        
        ln -s /etc/init.d/selinux /etc/rc5.d/S99selinux
        5⤵
        
        PID:1582
  - - /bin/sh
      sh -c "mkdir -p /usr/bin/dpkgd"
      4⤵
      PID:1583
    - - /bin/mkdir
        
        mkdir -p /usr/bin/dpkgd
        5⤵
        Reads runtime system information
        
        PID:1584
  - - /bin/sh
      sh -c "cp -f /bin/ps /usr/bin/dpkgd/ps"
      4⤵
      PID:1585
    - - /bin/cp
        
        cp -f /bin/ps /usr/bin/dpkgd/ps
        5⤵
        Write file to user bin folder
        Reads runtime system information
        
        PID:1586
  - - /bin/sh
      sh -c "mkdir -p /bin"
      4⤵
      PID:1593
    - - /bin/mkdir
        
        mkdir -p /bin
        5⤵
        Reads runtime system information
        
        PID:1594
  - - /bin/sh
      sh -c "cp -f /usr/bin/bsd-port/recei /bin/ps"
      4⤵
      PID:1595
    - - /bin/cp
        
        cp -f /usr/bin/bsd-port/recei /bin/ps
        5⤵
        Writes file to system bin folder
        Reads runtime system information
        
        PID:1597
  - - /bin/sh
      sh -c "chmod 0755 /bin/ps"
      4⤵
      PID:1598
    - - /bin/chmod
        
        chmod 0755 /bin/ps
        5⤵
        
        PID:1599
  - - /bin/sh
      sh -c "cp -f /usr/bin/lsof /usr/bin/dpkgd/lsof"
      4⤵
      PID:1600
    - - /bin/cp
        
        cp -f /usr/bin/lsof /usr/bin/dpkgd/lsof
        5⤵
        Write file to user bin folder
        Reads runtime system information
        
        PID:1601
  - - /bin/sh
      sh -c "mkdir -p /usr/bin"
      4⤵
      PID:1603
    - - /bin/mkdir
        
        mkdir -p /usr/bin
        5⤵
        Reads runtime system information
        
        PID:1604
  - - /bin/sh
      sh -c "cp -f /usr/bin/bsd-port/recei /usr/bin/lsof"
      4⤵
      PID:1605
    - - /bin/cp
        
        cp -f /usr/bin/bsd-port/recei /usr/bin/lsof
        5⤵
        Write file to user bin folder
        Reads runtime system information
        
        PID:1606
  - - /bin/sh
      sh -c "chmod 0755 /usr/bin/lsof"
      4⤵
      PID:1607
    - - /bin/chmod
        
        chmod 0755 /usr/bin/lsof
        5⤵
        
        PID:1608
  - - /bin/sh
      sh -c "insmod /usr/lib/xpacket.ko"
      4⤵
      PID:1609
    - - /sbin/insmod
        
        insmod /usr/lib/xpacket.ko
        5⤵
        Reads runtime system information
        
        PID:1610
- /bin/sh
  sh -c "mkdir -p /usr/bin"
  2⤵
  PID:1569
- - /bin/mkdir
    mkdir -p /usr/bin
    3⤵
    - Reads runtime system information
    PID:1570
- /bin/sh
  sh -c "cp -f /tmp/f57f99f56834d73211bac97f4ec2dc5c /usr/bin/oracle"
  2⤵
  PID:1571
- - /bin/cp
    cp -f /tmp/f57f99f56834d73211bac97f4ec2dc5c /usr/bin/oracle
    3⤵
    - Write file to user bin folder
    - Reads runtime system information
    PID:1572
- /bin/sh
  sh -c /usr/bin/oracle
  2⤵
  PID:1588
- - /usr/bin/oracle
    /usr/bin/oracle
    3⤵
    - Executes dropped EXE
    - Writes file to tmp directory
    PID:1589
- /bin/sh
  sh -c "insmod /usr/lib/xpacket.ko"
  2⤵
  PID:1591
- - /sbin/insmod
    insmod /usr/lib/xpacket.ko
    3⤵
    - Reads runtime system information
    PID:1592

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/VsystemsshMmt

Filesize
50B

MD5
ac48e192ce6b235893e50c1a26bbb21e

SHA1
a5e978664ec5bf735fe8bd17c5ff391eb3bca1fc

SHA256
5b5a477e3e86e581aa3fd2cfa9db44cd8ff631df829fa13f5f006554a67a44fd

SHA512
209691cd0d76f5462e91b96231b6c6ad605635b9614b66a62e11bf8f033577cb18fe993545308754c8026ceab7bfc690f4f4e1f94a244e2f7709ae2d7b8ca339

Download Submit
/etc/init.d/selinux

Filesize
36B

MD5
57cde9c165195cfb90c212057795ed49

SHA1
d77d9895306eb09ad9b54588fb7998c79c671563

SHA256
3e3488e9c63dfadffd594301e2192418b158238bfb8f83d6702123d72892cf36

SHA512
de9af53a508167cbbb820a99c2742918ec5b8c83877b77e43e4b441019311685647f47fb4666ba53ecef4e6a2d5514eb67981d471ddf173b04848609b3c0c00d

Download Submit
/tmp/Dest.cfg

Filesize
4B

MD5
d1a69640d53a32a9fb13e93d1c8f3104

SHA1
ad896e3ecf46771003093f24b88cd72af2225023

SHA256
6a27eece1c1658b237aede5c6c2b8af51d235ca08b2f7963b67d99caa7a12395

SHA512
100604d883bb248a24436fea1542cf81636e693256e0f0e8943c3cbdf7aa89bf759ddad050d1c3c487c07b00258dc0e6eefbc04d7109d7a788e2f8b98a9e3894

Download Submit
/tmp/notify.file

Filesize
37B

MD5
34f067f9c16045488cde0423f677db91

SHA1
f68da0e6f11625d09829636593c0aa6b775e2eaa

SHA256
f533d367aa85b7b278edc504daa15709520646f51bb2873e4156efc4916cf6a9

SHA512
c3a817d3e5b6fe3ad0f0122cd58f349b16ed02a26f6fa325b911db58623a12b1cabbae1f17eeab2bc4d1643a4363d9a37264e3a029d6c5c0d599db2131e94563

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/usr/bin/bsd-port/recei

Filesize
1.1MB

MD5
f57f99f56834d73211bac97f4ec2dc5c

SHA1
314fff2c301fb120ce100e812e3ef4b31580551d

SHA256
a7d548bcb9a58a58b5dfb9f059b302131fc0107a094f1fbb53c7d525b9327b60

SHA512
c2785a0b3231ccd5c217f6ec38aa8ca3ece2cc3a3364a3271582ba49cf9ac8a5dfd163765c6284ba72c9bd4e711cc059ba328e6a7ad0b1adeb7e85447b9350a8

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