mrblack | e242b05592dd0460ba7ff61fc458af4c41eac421d770a1a5f24bf5c81a6f1a74

Analysis

max time kernel
154s
max time network
159s
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
22-12-2023 02:58

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General

Target

57cdc48eaa07c06e05e40a6ff4f91152
Size

1.1MB
MD5

57cdc48eaa07c06e05e40a6ff4f91152
SHA1

73aa4491cc45e5bb2c124dea5f899bfbbb7b3871
SHA256

e242b05592dd0460ba7ff61fc458af4c41eac421d770a1a5f24bf5c81a6f1a74
SHA512

ccbbafcdb90bd58ebf773d3eb358efff9612346a91197b817d40d19d93db3f4fef9c856fb55162380217af3f78c21caee6adb5f3d1a26719f7d730c85c2a8b98
SSDEEP

24576:5ajGoPkpF6jxtFJh/zRgQ4CkIWFNEm7YZPSlJcsZvp2wL1:kkpF+jj1gQ4CrIEm7YZ4Jc8bL1

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	1541	getty
/usr/bin/.sshd	1587	.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/DbSecuritySpt
File opened for modification	/etc/init.d/selinux

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 8 IoCs

Hijack Execution Flow

T1574

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

Writes file to system bin folder 1 TTPs 1 IoCs

Hijack Execution Flow

T1574

description	ioc	Process
File opened for modification	/bin/ps	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 15 IoCs

Reads data from /proc virtual filesystem.

description	ioc	Process
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/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/meminfo	Process not Found
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	cp

Writes file to tmp directory 5 IoCs

Malware often drops required files in the /tmp directory.

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

/tmp/57cdc48eaa07c06e05e40a6ff4f91152
/tmp/57cdc48eaa07c06e05e40a6ff4f91152
1⤵
PID:1516

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc1.d/S97DbSecuritySpt"
1⤵
PID:1525
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc1.d/S97DbSecuritySpt
  2⤵
  PID:1526

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc2.d/S97DbSecuritySpt"
1⤵
PID:1527
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc2.d/S97DbSecuritySpt
  2⤵
  PID:1528

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc3.d/S97DbSecuritySpt"
1⤵
PID:1529
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc3.d/S97DbSecuritySpt
  2⤵
  PID:1530

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc4.d/S97DbSecuritySpt"
1⤵
PID:1531
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc4.d/S97DbSecuritySpt
  2⤵
  PID:1532

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc5.d/S97DbSecuritySpt"
1⤵
PID:1533
- /bin/ln
  ln -s /etc/init.d/DbSecuritySpt /etc/rc5.d/S97DbSecuritySpt
  2⤵
  PID:1534

/bin/sh
sh -c "mkdir -p /usr/bin/bsd-port"
1⤵
PID:1535
- /bin/mkdir
  mkdir -p /usr/bin/bsd-port
  2⤵
  - Reads runtime system information
  PID:1536

/bin/sh
sh -c "cp -f /tmp/57cdc48eaa07c06e05e40a6ff4f91152 /usr/bin/bsd-port/getty"
1⤵
PID:1537
- /bin/cp
  cp -f /tmp/57cdc48eaa07c06e05e40a6ff4f91152 /usr/bin/bsd-port/getty
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1538

/bin/sh
sh -c /usr/bin/bsd-port/getty
1⤵
PID:1540
- /usr/bin/bsd-port/getty
  /usr/bin/bsd-port/getty
  2⤵
  - Executes dropped EXE
  PID:1541

/bin/sh
sh -c "mkdir -p /usr/bin"
1⤵
PID:1543
- /bin/mkdir
  mkdir -p /usr/bin
  2⤵
  - Reads runtime system information
  PID:1544

/bin/sh
sh -c "cp -f /tmp/57cdc48eaa07c06e05e40a6ff4f91152 /usr/bin/.sshd"
1⤵
PID:1545
- /bin/cp
  cp -f /tmp/57cdc48eaa07c06e05e40a6ff4f91152 /usr/bin/.sshd
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1546

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc1.d/S99selinux"
1⤵
PID:1547
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc1.d/S99selinux
  2⤵
  PID:1548

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc2.d/S99selinux"
1⤵
PID:1549
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc2.d/S99selinux
  2⤵
  PID:1550

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc3.d/S99selinux"
1⤵
PID:1551
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc3.d/S99selinux
  2⤵
  PID:1552

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc4.d/S99selinux"
1⤵
PID:1553
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc4.d/S99selinux
  2⤵
  PID:1554

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc5.d/S99selinux"
1⤵
PID:1555
- /bin/ln
  ln -s /etc/init.d/selinux /etc/rc5.d/S99selinux
  2⤵
  PID:1556

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

/bin/sh
sh -c "cp -f /bin/ps /usr/bin/dpkgd/ps"
1⤵
PID:1559
- /bin/cp
  cp -f /bin/ps /usr/bin/dpkgd/ps
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1560

/bin/sh
sh -c "mkdir -p /bin"
1⤵
PID:1561
- /bin/mkdir
  mkdir -p /bin
  2⤵
  - Reads runtime system information
  PID:1562

/bin/sh
sh -c "cp -f /usr/bin/bsd-port/getty /bin/ps"
1⤵
PID:1563
- /bin/cp
  cp -f /usr/bin/bsd-port/getty /bin/ps
  2⤵
  - Writes file to system bin folder
  - Reads runtime system information
  PID:1564

/bin/sh
sh -c "chmod 0755 /bin/ps"
1⤵
PID:1565
- /bin/chmod
  chmod 0755 /bin/ps
  2⤵
  PID:1566

/bin/sh
sh -c "cp -f /usr/bin/lsof /usr/bin/dpkgd/lsof"
1⤵
PID:1567
- /bin/cp
  cp -f /usr/bin/lsof /usr/bin/dpkgd/lsof
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1568

/bin/sh
sh -c "mkdir -p /usr/bin"
1⤵
PID:1569
- /bin/mkdir
  mkdir -p /usr/bin
  2⤵
  - Reads runtime system information
  PID:1570

/bin/sh
sh -c "cp -f /usr/bin/bsd-port/getty /usr/bin/lsof"
1⤵
PID:1571
- /bin/cp
  cp -f /usr/bin/bsd-port/getty /usr/bin/lsof
  2⤵
  - Write file to user bin folder
  - Reads runtime system information
  PID:1572

/bin/sh
sh -c "chmod 0755 /usr/bin/lsof"
1⤵
PID:1573
- /bin/chmod
  chmod 0755 /usr/bin/lsof
  2⤵
  PID:1574

/bin/sh
sh -c "insmod /usr/lib/xpacket.ko"
1⤵
PID:1575
- /sbin/insmod
  insmod /usr/lib/xpacket.ko
  2⤵
  - Reads runtime system information
  PID:1576

/bin/sh
sh -c /usr/bin/.sshd
1⤵
PID:1586
- /usr/bin/.sshd
  /usr/bin/.sshd
  2⤵
  - Executes dropped EXE
  PID:1587

/bin/sh
sh -c "insmod /usr/lib/xpacket.ko"
1⤵
PID:1589
- /sbin/insmod
  insmod /usr/lib/xpacket.ko
  2⤵
  - Reads runtime system information
  PID:1590

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
a4b4e9a490266c4b1d80630447f1be9d

SHA1
106096fc8647c3609490b5ab38f279b338e6a58c

SHA256
4fbe1749e98f0b7f777bf865969b63c93130a009821edfe478c69f0de6fb225d

SHA512
b78f28ffd9138a99d731d78b91e8e171dc350482b57096b10c9bb9d05c9108273f8f4d26478282600a722c1c02c8058be19a6b2fbc8dd90626961811738a6e0e

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/etc/init.d/selinux

Filesize
36B

MD5
993cc15058142d96c3daf7852c3d5ee8

SHA1
0950b8b391b04dd3895ea33cd3141543ebd2525d

SHA256
8171d077918611803d93088409f220c66fae1c670b297e1aa5d8cbd548ce9208

SHA512
0c4256c00a3710f97e92581b552682b36b62afc35fe72622c491323c618c19ea62611ac04ccafc3dfcde2254a2ebbd93b69b66795b16e36332293bed83adb928

Download Submit
/tmp/gates.lock

Filesize
4B

MD5
81c8727c62e800be708dbf37c4695dff

SHA1
42e12cb7198394beb558db2dc1f1a862366e1045

SHA256
4091f2c5c45d0cb95c6b43919f9f07f62f7f6c6fb46ca207264b2aee4ee6e4f9

SHA512
a6bb8360a59413364b955cde894976b6f7401d2b07296bf964d224eef87032ac500dccc76b01c445d8e85692d555ae28d672929376e32fe9cf80bb721b9d1632

Download Submit
/tmp/moni.lock

Filesize
4B

MD5
894b77f805bd94d292574c38c5d628d5

SHA1
1784f0e37c1fdd6200c1e8b28e8caae5402e74e0

SHA256
d24eac45e69be063cc0053eb02650954eec62c314c405e564a4d11e951392e75

SHA512
605b8ee18c6bd7c9d489faa803dc4c00fed6e7a4b21a9a69ba7b429642a06d7fe42e5fd45162f72fff76f1ec518c5840399c97d4ab0f7633651d35e2b19f2e05

Download Submit
/tmp/notify.file

Filesize
37B

MD5
4bf128f5891680a0a594f9b1636bd114

SHA1
6069c437d478ade9a88c96578f8deecc8e4131b1

SHA256
06210b9befaa5922db16c71b82fe66ce29cb3ea8dff0b5954a5380d964e1f529

SHA512
9763d0e9572c91e92b7c1942e3f1f0bcf11df721996bd905096f3a7761a807cb6fb576ba139e70346d512069a8bdcfdde9eaa0c9b2caa306a1710aa79e22c5f2

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

Filesize
69B

MD5
263b0ce42f14cf38e8560580bc9da9f6

SHA1
6808c57007b269a6f26b04b53b85ff674b44a745

SHA256
7a6dce7ed89d28fb62a44dd2cc81f6b4072dc18d8c4ca7ea3a83baf4c87b4b02

SHA512
37201cec1a1ad823eb34aa05330e99e27a24f28e8297cb56a67b56c4ba98570ae9b24ca2610f0b0709c0eef768bafcc88ab7489d3230f2436c944df45dd78506

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

Filesize
1.1MB

MD5
57cdc48eaa07c06e05e40a6ff4f91152

SHA1
73aa4491cc45e5bb2c124dea5f899bfbbb7b3871

SHA256
e242b05592dd0460ba7ff61fc458af4c41eac421d770a1a5f24bf5c81a6f1a74

SHA512
ccbbafcdb90bd58ebf773d3eb358efff9612346a91197b817d40d19d93db3f4fef9c856fb55162380217af3f78c21caee6adb5f3d1a26719f7d730c85c2a8b98

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

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Downloads