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

Processes:

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

Executes dropped EXE 2 IoCs

Processes:

getty.sshd

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

Processes:

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

Processes:

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

Processes:

description ioc

File opened for reading /proc/net/route

ioc	pid	process
/usr/bin/bsd-port/getty	1563	getty
/usr/bin/.sshd	1579	.sshd

description	ioc
File opened for reading	/proc/cpuinfo

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

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

Write file to user bin folder 1 TTPs 9 IoCs

Hijack Execution Flow

T1574

Processes:

cpcpcpcpcpcp

description	ioc
File opened for modification	/usr/bin/bsd-port/getty.lock
File opened for modification	/usr/bin/bsd-port/udevd.lock
File opened for modification	/usr/bin/dpkgd/lsof	cp
File opened for modification	/usr/bin/bsd-port/conf.n
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

Processes:

cpcp

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

Processes:

description ioc

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

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

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.

Processes:

cpmkdirmkdircpmkdircpmkdircpcpcpmkdirmkdirmkdirinsmodinsmodmkdirmkdircpmkdirmkdircp

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
File opened for reading	/proc/filesystems	cp
File opened for reading	/proc/filesystems	cp
File opened for reading	/proc/meminfo
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.

Processes:

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 Matrix ATT&CK v13

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

Virtualization/Sandbox Evasion

T1497

Hijack Execution Flow

T1574

Credential Access

Discovery

Virtualization/Sandbox Evasion

T1497

System Network Configuration Discovery

T1016

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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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

Download Submit
/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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