mrblack | ae5c45a7a78f5deddd80ff823c1ffae8aeeaa1d8239d2e5470784fbf0d244479

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
28-07-2024 22:19

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General

Target

27728b1657230961d56265ee5f305647_JaffaCakes118
Size

1.1MB
MD5

27728b1657230961d56265ee5f305647
SHA1

99498fa6b04efb077da64f37f71ec00515ff85ca
SHA256

ae5c45a7a78f5deddd80ff823c1ffae8aeeaa1d8239d2e5470784fbf0d244479
SHA512

29bf708c71eab683ba7f87932a53490cfdff48343d2168a3a70e0d200e3090840c2eebfc5fcca7630ce01ddb38eb530235662f8aa3709e238da658290887783b
SSDEEP

24576:4vRE7caCfKGPqVEDNLFxKsfaHI+gIGYuuCol7r:4vREKfPqVE5jKsfaHRHGVo7r

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 1533 getty
/usr/bin/.sshd 1541 .sshd

ioc	pid	process
/usr/bin/bsd-port/getty	1533	getty
/usr/bin/.sshd	1541	.sshd

Modifies init.d 1 TTPs 2 IoCs

Adds/modifies system service, likely for persistence.

persistence

Boot or Logon Autostart Execution

T1547

Processes:

27728b1657230961d56265ee5f305647_JaffaCakes118getty

description	ioc	process
File opened for modification	/etc/init.d/DbSecuritySpt	27728b1657230961d56265ee5f305647_JaffaCakes118
File opened for modification	/etc/init.d/selinux	getty

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

System Network Configuration Discovery
T1016

Processes:

27728b1657230961d56265ee5f305647_JaffaCakes118

description ioc process

File opened for reading /proc/net/route 27728b1657230961d56265ee5f305647_JaffaCakes118

Write file to user bin folder 1 TTPs 9 IoCs

Hijack Execution Flow

T1574

Processes:

27728b1657230961d56265ee5f305647_JaffaCakes118cpgettycpcpcpcpcp

description	ioc	process
File opened for modification	/usr/bin/bsd-port/getty.lock	27728b1657230961d56265ee5f305647_JaffaCakes118
File opened for modification	/usr/bin/bsd-port/getty	cp
File opened for modification	/usr/bin/bsd-port/getty.lock	getty
File opened for modification	/usr/bin/bsd-port/udevd.lock	27728b1657230961d56265ee5f305647_JaffaCakes118
File opened for modification	/usr/bin/.sshd	cp
File opened for modification	/usr/bin/dpkgd/lsof	cp
File opened for modification	/usr/bin/dpkgd/ps	cp
File opened for modification	/usr/bin/lsof	cp
File opened for modification	/usr/bin/ps	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/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

Processes:

getty27728b1657230961d56265ee5f305647_JaffaCakes118

description ioc process

File opened for reading /proc/cpuinfo getty
File opened for reading /proc/cpuinfo 27728b1657230961d56265ee5f305647_JaffaCakes118

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

description	ioc	process
File opened for reading	/proc/cpuinfo	getty
File opened for reading	/proc/cpuinfo	27728b1657230961d56265ee5f305647_JaffaCakes118

Reads system network configuration 1 TTPs 4 IoCs

Uses contents of /proc filesystem to enumerate network settings.

System Network Configuration Discovery

T1016

Processes:

27728b1657230961d56265ee5f305647_JaffaCakes118getty

description	ioc	process
File opened for reading	/proc/net/route	27728b1657230961d56265ee5f305647_JaffaCakes118
File opened for reading	/proc/net/arp	27728b1657230961d56265ee5f305647_JaffaCakes118
File opened for reading	/proc/net/dev	getty
File opened for reading	/proc/net/dev	27728b1657230961d56265ee5f305647_JaffaCakes118

Reads runtime system information 24 IoCs

Reads data from /proc virtual filesystem.

Processes:

cpcpmkdir27728b1657230961d56265ee5f305647_JaffaCakes118cpmkdirmkdircpcpcpgettymkdirmkdircp.sshdinsmodmkdirmkdircpinsmod

description	ioc	process
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/stat	27728b1657230961d56265ee5f305647_JaffaCakes118
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	cp
File opened for reading	/proc/sys/kernel/version	27728b1657230961d56265ee5f305647_JaffaCakes118
File opened for reading	/proc/filesystems	cp
File opened for reading	/proc/sys/kernel/version	getty
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/stat	getty
File opened for reading	/proc/meminfo	getty
File opened for reading	/proc/sys/kernel/version	.sshd
File opened for reading	/proc/meminfo	27728b1657230961d56265ee5f305647_JaffaCakes118
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/cmdline	insmod

Writes file to tmp directory 8 IoCs

Malware often drops required files in the /tmp directory.

Processes:

27728b1657230961d56265ee5f305647_JaffaCakes118.sshd

description	ioc	process
File opened for modification	/tmp/gates.lock	27728b1657230961d56265ee5f305647_JaffaCakes118
File opened for modification	/tmp/notify.file	27728b1657230961d56265ee5f305647_JaffaCakes118
File opened for modification	/tmp/moni.lock	.sshd
File opened for modification	/tmp/notify.file	.sshd
File opened for modification	/tmp/conf.n	27728b1657230961d56265ee5f305647_JaffaCakes118
File opened for modification	/tmp/gates.lock	.sshd
File opened for modification	/tmp/moni.lock	27728b1657230961d56265ee5f305647_JaffaCakes118
File opened for modification	/tmp/bill.lock	27728b1657230961d56265ee5f305647_JaffaCakes118

/tmp/27728b1657230961d56265ee5f305647_JaffaCakes118
/tmp/27728b1657230961d56265ee5f305647_JaffaCakes118
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:1511

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc1.d/S97DbSecuritySpt"
2⤵
PID:1517

/usr/bin/ln
ln -s /etc/init.d/DbSecuritySpt /etc/rc1.d/S97DbSecuritySpt
3⤵
PID:1518

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc2.d/S97DbSecuritySpt"
2⤵
PID:1519

/usr/bin/ln
ln -s /etc/init.d/DbSecuritySpt /etc/rc2.d/S97DbSecuritySpt
3⤵
PID:1520

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc3.d/S97DbSecuritySpt"
2⤵
PID:1521

/usr/bin/ln
ln -s /etc/init.d/DbSecuritySpt /etc/rc3.d/S97DbSecuritySpt
3⤵
PID:1522

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc4.d/S97DbSecuritySpt"
2⤵
PID:1523

/usr/bin/ln
ln -s /etc/init.d/DbSecuritySpt /etc/rc4.d/S97DbSecuritySpt
3⤵
PID:1524

/bin/sh
sh -c "ln -s /etc/init.d/DbSecuritySpt /etc/rc5.d/S97DbSecuritySpt"
2⤵
PID:1525

/usr/bin/ln
ln -s /etc/init.d/DbSecuritySpt /etc/rc5.d/S97DbSecuritySpt
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/27728b1657230961d56265ee5f305647_JaffaCakes118 /usr/bin/bsd-port/getty"
2⤵
PID:1529

/usr/bin/cp
cp -f /tmp/27728b1657230961d56265ee5f305647_JaffaCakes118 /usr/bin/bsd-port/getty
3⤵
- Write file to user bin folder
- Reads runtime system information
PID:1530

/bin/sh
sh -c /usr/bin/bsd-port/getty
2⤵
PID:1532

/usr/bin/bsd-port/getty
/usr/bin/bsd-port/getty
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:1549

/usr/bin/ln
ln -s /etc/init.d/selinux /etc/rc1.d/S99selinux
5⤵
PID:1550

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc2.d/S99selinux"
4⤵
PID:1551

/usr/bin/ln
ln -s /etc/init.d/selinux /etc/rc2.d/S99selinux
5⤵
PID:1552

/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:1561

/bin/sh
sh -c "cp -f /bin/lsof /usr/bin/dpkgd/lsof"
4⤵
PID:1562

/usr/bin/cp
cp -f /bin/lsof /usr/bin/dpkgd/lsof
5⤵
- Write file to user bin folder
- Reads runtime system information
PID:1563

/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/getty /bin/lsof"
4⤵
PID:1566

/usr/bin/cp
cp -f /usr/bin/bsd-port/getty /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:1569

/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/getty /bin/ps"
4⤵
PID:1575

/usr/bin/cp
cp -f /usr/bin/bsd-port/getty /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/getty /usr/bin/lsof"
4⤵
PID:1582

/usr/bin/cp
cp -f /usr/bin/bsd-port/getty /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:1584

/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/getty /usr/bin/ps"
4⤵
PID:1589

/usr/bin/cp
cp -f /usr/bin/bsd-port/getty /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/27728b1657230961d56265ee5f305647_JaffaCakes118 /usr/bin/.sshd"
2⤵
PID:1537

/usr/bin/cp
cp -f /tmp/27728b1657230961d56265ee5f305647_JaffaCakes118 /usr/bin/.sshd
3⤵
- Write file to user bin folder
- Reads runtime system information
PID:1538

/bin/sh
sh -c /usr/bin/.sshd
2⤵
PID:1540

/usr/bin/.sshd
/usr/bin/.sshd
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

Replay Monitor

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Downloads

/etc/init.d/DbSecuritySpt

Filesize
64B

MD5
11c5ad7072414f787fc1abaa0ce64926

SHA1
4e8356586c536588f162afbf8ea01e31f3e5f1e1

SHA256
27c7075cde2808864255fb6909bac09d852b97b3b21436e88e16b979dc59a55b

SHA512
91ca7e3898f164b435652f6da26b431b5cca093af3a49426613b02495d2b531b1222f592ea20cf6c81b6a65aec6640d062ef4bb55e804edc710f7c80cc9b5c63

Download Submit
/etc/init.d/selinux

Filesize
36B

MD5
993cc15058142d96c3daf7852c3d5ee8

SHA1
0950b8b391b04dd3895ea33cd3141543ebd2525d

SHA256
8171d077918611803d93088409f220c66fae1c670b297e1aa5d8cbd548ce9208

SHA512
0c4256c00a3710f97e92581b552682b36b62afc35fe72622c491323c618c19ea62611ac04ccafc3dfcde2254a2ebbd93b69b66795b16e36332293bed83adb928

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/tmp/conf.n

Filesize
69B

MD5
227856889c50184308123071d54e9a8c

SHA1
ef1f44f44c1b9cda768cedbf085d984fac1094c0

SHA256
842f3c609faab1be3d68bf9e9e6fd594be0057450988cc00274c0d8ed5b14345

SHA512
edc405aa41c9bb428455d737bf4e57b3a735a80aafd935b7cdbae0da2f3dc5126e3eb8396b2fe22e1f1680550e9c23830a7214c9ab98e2dde5b9c268d18c9243

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/tmp/gates.lock

Filesize
4B

MD5
0f3d014eead934bbdbacb62a01dc4831

SHA1
443233bf934850484d12f21d9603a36ee83d1dfb

SHA256
66c03337b22c301d55a339a94165dc09628491c3dfe01a57ef62e3eab452e898

SHA512
30e3cef49700596aa4b725177f0fca3f38355d0c45a445c6d176e9e3a4ecf4ca7bdde2a3dfaceb9f67b74bc145bb816bf3daad9414080bcb859c62de097e4b9b

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/tmp/moni.lock

Filesize
4B

MD5
d010396ca8abf6ead8cacc2c2f2f26c7

SHA1
731df0fc93417f72fcb56f09cd754f9382ae6373

SHA256
596d0c702ba6d20835982c87a878f97d07a163285a0a3ee98c6e7a8e0459a8cb

SHA512
843da40f223209d8e90012e1a35004387636ffcb23cce0602a3964055ed790d271e5fd274351b8dd3afc4200e0a9d28811f7a0987f44d813e4257f10dedabeba

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/tmp/notify.file

Filesize
51B

MD5
e3da438825e5bb6f3bc828d12b0f6227

SHA1
4b8c345c0173853087cccdf06be98eebbc000cab

SHA256
acc6c96e28bbabba806ec541939dd2de4003efbfc448f6466120aa54bc0f9de7

SHA512
f0846672a0c36a4c4fbb80c20a4beb1bb274db23e32d8c46af5a4cf02b151ee2578fcbb56ec23cd653496798e245f760a0bd7212aa93949ee2e55aa264ec39b6

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/usr/bin/bsd-port/getty

Filesize
1.1MB

MD5
27728b1657230961d56265ee5f305647

SHA1
99498fa6b04efb077da64f37f71ec00515ff85ca

SHA256
ae5c45a7a78f5deddd80ff823c1ffae8aeeaa1d8239d2e5470784fbf0d244479

SHA512
29bf708c71eab683ba7f87932a53490cfdff48343d2168a3a70e0d200e3090840c2eebfc5fcca7630ce01ddb38eb530235662f8aa3709e238da658290887783b

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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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