mrblack | 2896a3a7802aad0563d33c50d64193857fc35287a00ee2d72a7bb17e6d4bacd7

Analysis

max time kernel
153s
max time network
153s
platform
ubuntu-18.04_amd64
resource
ubuntu1804-amd64-20231215-en
resource tags

arch:amd64arch:i386image:ubuntu1804-amd64-20231215-enkernel:4.15.0-213-genericlocale:en-usos:ubuntu-18.04-amd64system
submitted
20-12-2023 16:34

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General

Target

e96a4bee4d4282ede40a23552d366fc7
Size

1.2MB
MD5

e96a4bee4d4282ede40a23552d366fc7
SHA1

b0c97e7c2ddc799f9568643d5f85ee38da2a77c7
SHA256

2896a3a7802aad0563d33c50d64193857fc35287a00ee2d72a7bb17e6d4bacd7
SHA512

4c7e11ff7cb366f51ec5636f9ccd7bfa15ca59b71432a5bdbd8c62fbab2391bd192164a7b5b7dc9cb8508196095c1b3d7697bf55be417cda9250743a8d1db2a3
SSDEEP

24576:e845rGHu6gVJKG75oFpA0VWeX4s2y1q2rJp0:745vRVJKGtSA0VWeoDu9p0

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/getty	1563	getty
/usr/bin/.sshd	1579	.sshd

Checks CPU configuration 1 TTPs 1 IoCs

Checks CPU information which indicate if the system is a virtual machine.

antivm

Virtualization/Sandbox Evasion

T1497

description	ioc
File opened for reading	/proc/cpuinfo

Modifies init.d 1 TTPs 2 IoCs

Adds/modifies system service, likely for persistence.

persistence

Boot or Logon Autostart Execution

T1547

description	ioc
File opened for modification	/etc/init.d/selinux
File opened for modification	/etc/init.d/DbSecuritySpt

Reads system routing table 1 TTPs 1 IoCs

Gets active network interfaces from /proc virtual filesystem.

System Network Configuration Discovery

T1016

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

Write file to user bin folder 1 TTPs 9 IoCs

Hijack Execution Flow

T1574

description	ioc	Process
File opened for modification	/usr/bin/bsd-port/getty.lock	Process not Found
File opened for modification	/usr/bin/bsd-port/udevd.lock	Process not Found
File opened for modification	/usr/bin/dpkgd/lsof	cp
File opened for modification	/usr/bin/bsd-port/conf.n	Process not Found
File opened for modification	/usr/bin/bsd-port/getty	cp
File opened for modification	/usr/bin/.sshd	cp
File opened for modification	/usr/bin/dpkgd/ps	cp
File opened for modification	/usr/bin/dpkgd/ss	cp
File opened for modification	/usr/bin/lsof	cp

Writes file to system bin folder 1 TTPs 2 IoCs

Hijack Execution Flow

T1574

description	ioc	Process
File opened for modification	/bin/ps	cp
File opened for modification	/bin/ss	cp

Reads system network configuration 1 TTPs 3 IoCs

Uses contents of /proc filesystem to enumerate network settings.

System Network Configuration Discovery

T1016

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

Reads runtime system information 23 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/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/stat	Process not Found
File opened for reading	/proc/filesystems	cp
File opened for reading	/proc/filesystems	cp
File opened for reading	/proc/meminfo	Process not Found
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/cmdline	insmod
File opened for reading	/proc/cmdline	insmod
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	mkdir
File opened for reading	/proc/filesystems	cp

Writes file to tmp directory 4 IoCs

Malware often drops required files in the /tmp directory.

description	ioc
File opened for modification	/tmp/moni.lod
File opened for modification	/tmp/bill.lock
File opened for modification	/tmp/gates.lod
File opened for modification	/tmp/notify.file

/tmp/e96a4bee4d4282ede40a23552d366fc7
/tmp/e96a4bee4d4282ede40a23552d366fc7
1⤵
PID:1530

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc1.d/S97DbSecuritySpt"
1⤵
PID:1545
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc1.d/S97DbSecuritySpt
  2⤵
  PID:1546

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc2.d/S97DbSecuritySpt"
1⤵
PID:1547
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc2.d/S97DbSecuritySpt
  2⤵
  PID:1548

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc3.d/S97DbSecuritySpt"
1⤵
PID:1549
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc3.d/S97DbSecuritySpt
  2⤵
  PID:1550

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc4.d/S97DbSecuritySpt"
1⤵
PID:1551
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc4.d/S97DbSecuritySpt
  2⤵
  PID:1552

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc5.d/S97DbSecuritySpt"
1⤵
PID:1553
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc5.d/S97DbSecuritySpt
  2⤵
  PID:1554

/bin/sh
sh -c "mkdir -p /usr/bin/bsd-port"
1⤵
PID:1555
- /bin/mkdir
  mkdir -p /usr/bin/bsd-port
  2⤵
  - Reads runtime system information
  PID:1556

/bin/sh
sh -c "mkdir -p /usr/bin/bsd-port"
1⤵
PID:1557
- /bin/mkdir
  mkdir -p /usr/bin/bsd-port
  2⤵
  - Reads runtime system information
  PID:1558

/bin/sh
sh -c "cp -f /tmp/e96a4bee4d4282ede40a23552d366fc7 /usr/bin/bsd-port/getty"
1⤵
PID:1559
- /bin/cp
  cp -f /tmp/e96a4bee4d4282ede40a23552d366fc7 /usr/bin/bsd-port/getty
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1560

/bin/sh
sh -c /usr/bin/bsd-port/getty
1⤵
PID:1562
- /usr/bin/bsd-port/getty
  /usr/bin/bsd-port/getty
  2⤵
  - Executes dropped EXE
  PID:1563

/bin/sh
sh -c "mkdir -p /usr/bin"
1⤵
PID:1565
- /bin/mkdir
  mkdir -p /usr/bin
  2⤵
  - Reads runtime system information
  PID:1566

/bin/sh
sh -c "mkdir -p /usr/bin"
1⤵
PID:1567
- /bin/mkdir
  mkdir -p /usr/bin
  2⤵
  - Reads runtime system information
  PID:1568

/bin/sh
sh -c "cp -f /tmp/e96a4bee4d4282ede40a23552d366fc7 /usr/bin/.sshd"
1⤵
PID:1569
- /bin/cp
  cp -f /tmp/e96a4bee4d4282ede40a23552d366fc7 /usr/bin/.sshd
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1570

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc1.d/S99selinux"
1⤵
PID:1571
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc1.d/S99selinux
  2⤵
  PID:1572

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc2.d/S99selinux"
1⤵
PID:1573
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc2.d/S99selinux
  2⤵
  PID:1574

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc3.d/S99selinux"
1⤵
PID:1575
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc3.d/S99selinux
  2⤵
  PID:1576

/bin/sh
sh -c /usr/bin/.sshd
1⤵
PID:1578
- /usr/bin/.sshd
  /usr/bin/.sshd
  2⤵
  - Executes dropped EXE
  PID:1579

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc4.d/S99selinux"
1⤵
PID:1580
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc4.d/S99selinux
  2⤵
  PID:1581

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc5.d/S99selinux"
1⤵
PID:1582
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc5.d/S99selinux
  2⤵
  PID:1583

/bin/sh
sh -c "mkdir -p /usr/bin/dpkgd"
1⤵
PID:1584
- /bin/mkdir
  mkdir -p /usr/bin/dpkgd
  2⤵
  - Reads runtime system information
  PID:1585

/bin/sh
sh -c "cp -f /bin/ps /usr/bin/dpkgd/ps"
1⤵
PID:1586
- /bin/cp
  cp -f /bin/ps /usr/bin/dpkgd/ps
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1587

/bin/sh
sh -c "mkdir -p /bin"
1⤵
PID:1588
- /bin/mkdir
  mkdir -p /bin
  2⤵
  - Reads runtime system information
  PID:1589

/bin/sh
sh -c "mkdir -p /bin"
1⤵
PID:1590
- /bin/mkdir
  mkdir -p /bin
  2⤵
  - Reads runtime system information
  PID:1591

/bin/sh
sh -c "cp -f /usr/bin/bsd-port/getty /bin/ps"
1⤵
PID:1592
- /bin/cp
  cp -f /usr/bin/bsd-port/getty /bin/ps
  2⤵
  - Writes file to system bin folder
  - Reads runtime system information
  PID:1593

/bin/sh
sh -c "chmod 0755 /bin/ps"
1⤵
PID:1594
- /bin/chmod
  chmod 0755 /bin/ps
  2⤵
  PID:1595

/bin/sh
sh -c "cp -f /bin/ss /usr/bin/dpkgd/ss"
1⤵
PID:1596
- /bin/cp
  cp -f /bin/ss /usr/bin/dpkgd/ss
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1597

/bin/sh
sh -c "mkdir -p /bin"
1⤵
PID:1598
- /bin/mkdir
  mkdir -p /bin
  2⤵
  - Reads runtime system information
  PID:1599

/bin/sh
sh -c "mkdir -p /bin"
1⤵
PID:1600
- /bin/mkdir
  mkdir -p /bin
  2⤵
  - Reads runtime system information
  PID:1601

/bin/sh
sh -c "cp -f /usr/bin/bsd-port/getty /bin/ss"
1⤵
PID:1602
- /bin/cp
  cp -f /usr/bin/bsd-port/getty /bin/ss
  2⤵
  - Writes file to system bin folder
  - Reads runtime system information
  PID:1603

/bin/sh
sh -c "chmod 0755 /bin/ss"
1⤵
PID:1604
- /bin/chmod
  chmod 0755 /bin/ss
  2⤵
  PID:1605

/bin/sh
sh -c "cp -f /usr/bin/lsof /usr/bin/dpkgd/lsof"
1⤵
PID:1606
- /bin/cp
  cp -f /usr/bin/lsof /usr/bin/dpkgd/lsof
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1607

/bin/sh
sh -c "mkdir -p /usr/bin"
1⤵
PID:1608
- /bin/mkdir
  mkdir -p /usr/bin
  2⤵
  - Reads runtime system information
  PID:1609

/bin/sh
sh -c "mkdir -p /usr/bin"
1⤵
PID:1610
- /bin/mkdir
  mkdir -p /usr/bin
  2⤵
  - Reads runtime system information
  PID:1611

/bin/sh
sh -c "cp -f /usr/bin/bsd-port/getty /usr/bin/lsof"
1⤵
PID:1612
- /bin/cp
  cp -f /usr/bin/bsd-port/getty /usr/bin/lsof
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1613

/bin/sh
sh -c "chmod 0755 /usr/bin/lsof"
1⤵
PID:1615
- /bin/chmod
  chmod 0755 /usr/bin/lsof
  2⤵
  PID:1616

/bin/sh
sh -c "insmod /tmp/xpacket.ko"
1⤵
PID:1618
- /sbin/insmod
  insmod /tmp/xpacket.ko
  2⤵
  - Reads runtime system information
  PID:1620

/bin/sh
sh -c "insmod /usr/bin/bsd-port/xpacket.ko"
1⤵
PID:1619
- /sbin/insmod
  insmod /usr/bin/bsd-port/xpacket.ko
  2⤵
  - Reads runtime system information
  PID:1621

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/DbSecuritySpt

Filesize
50B

MD5
afc89922466cab83731c27ee415b1db1

SHA1
d2d3a6420ea20a8c7882bf7ad46992342d067e94

SHA256
ad85c88f4ee6da46206b8b15b2c2f627c9f597a538bb642c66ccb19dcbad360c

SHA512
fc76c1a8f94df4d07db375657f05ee157a1a20edd4052380b07d386f198bc26b4d5004dce77564e91436636750a9550124b124cebab0ee722dd99354d75484ba

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/etc/init.d/selinux

Filesize
36B

MD5
993cc15058142d96c3daf7852c3d5ee8

SHA1
0950b8b391b04dd3895ea33cd3141543ebd2525d

SHA256
8171d077918611803d93088409f220c66fae1c670b297e1aa5d8cbd548ce9208

SHA512
0c4256c00a3710f97e92581b552682b36b62afc35fe72622c491323c618c19ea62611ac04ccafc3dfcde2254a2ebbd93b69b66795b16e36332293bed83adb928

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/tmp/gates.lod

Filesize
4B

MD5
99adff456950dd9629a5260c4de21858

SHA1
a7d3048f93d82e2e3dd337ea701ef07704939a3b

SHA256
f1294f35f19846cd012506eadcc13ecda95eb7ddc6c661bc1b9402c4b00eb703

SHA512
b010dc2a8dbdbca81650a3421ad3667c095afe93ec3afe915642a87db4e33e7bf15841673c3a4f2ad018da8ef90dd0eb765d9d8d5fc43d25396313a9e2cd04fb

Download Submit
/tmp/moni.lod

Filesize
4B

MD5
e9fd7c2c6623306db59b6aef5c0d5cac

SHA1
23bfd8a26fdeaa0ccf8a0b3f8705506064a99ba0

SHA256
583b08e38c98f4350a8906d25344ac80b099921a8a8929e64b2dc2b553521343

SHA512
0d19563eb4d989fdbdbe9250ef2c8856bcca196bcbff66c21a564f5da3f6270cb3040997d04abbf7e4a2ded7bae5160119471ab541604c0e7696422dd9d80d32

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/tmp/notify.file

Filesize
37B

MD5
241cdf833467cf03135f01697bdcf243

SHA1
d686b7700e5f6842378100b290bfd4ff870b0c0b

SHA256
e8c73cbd74a7e83ed49bc3691b0ece9c97c241f644dd77052f34776e7e8c2e6d

SHA512
e7fe8dbd57d6dc1b408d68b51dc6b9418c597b98c5f74543a8729c99e6315a464fb3329ead5ed37531f42a9b29d7c2c3ec8cf1ecd56ad49ed4f0ca0fd82e21b1

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/usr/bin/bsd-port/conf.n

Filesize
73B

MD5
dee75bf6cf6e768bea9d5a94b34b7e54

SHA1
ded62c82df43661b853cc8b9c285b87dac77c8f8

SHA256
09650e2ce4431ebc6b0c70037ba3992d26552f0623a95531fe886359f4a4e119

SHA512
aa67c5d379621737b576deb0adb4322e6ee97f7d39394a73162e7d4df6e5c488b92bca4121a15c2e417ad373944251050407aead4f1cc1c66efc6881841b279a

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/usr/bin/bsd-port/getty

Filesize
1.2MB

MD5
e96a4bee4d4282ede40a23552d366fc7

SHA1
b0c97e7c2ddc799f9568643d5f85ee38da2a77c7

SHA256
2896a3a7802aad0563d33c50d64193857fc35287a00ee2d72a7bb17e6d4bacd7

SHA512
4c7e11ff7cb366f51ec5636f9ccd7bfa15ca59b71432a5bdbd8c62fbab2391bd192164a7b5b7dc9cb8508196095c1b3d7697bf55be417cda9250743a8d1db2a3

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/usr/bin/dpkgd/lsof

Filesize
159KB

MD5
e093dc78225e2a0a25e3b137c1c1e442

SHA1
c29497cfaae729eb576875e4fdfa400640ab16be

SHA256
1190f4dbc7be174de8fd4096c9bf7a28eebfac937d308b7cc533be4a1240d26e

SHA512
fe1cc7a65327732eaaee89f427c10239ba822430e34177842f4681068d78d404b1830d808a2a71b1efcc5f126c6d8c053512237421173aaa150e215a672da6f0

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/usr/bin/dpkgd/ps

Filesize
130KB

MD5
558edc26f8a38fa9788220b9af8a73e7

SHA1
3024d44e580e9c67f32f6c585d50e2a6cc9a7cac

SHA256
b76435c80333d2c1fd18e0e7682f1c9dfb5da8d507e93e3c416f54b481c428d5

SHA512
edaa425b441044f015e8f68fffa1664e42372d00dd0e7b0924d24ce947aa8e5f96b3bdc326fa2f8b978e3fcf638a1ceca45a223735db73f1607df66990feb56f

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/usr/bin/dpkgd/ss

Filesize
136KB

MD5
1dc929b5f2cd12fe6a2fe71140d2a9e3

SHA1
f9995a92bb201b1b7738a39a38570ef0c40b52d2

SHA256
418aae1da62554afe9f260866267af328fd761b3fd6f90f0ea53d543e2fefc38

SHA512
fbed011c595084548db440dfbe485b7d27032a44a6ae9e141fe43f31c8c524ff9347135ab035deb441fca99e5a3794f7bb9194f148aa2f60f1547a7c67d47373

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads