mrblack | 75a39283e00fdd65813efd892522b77c655b920b32637b0c7106a0340d1a97cf

Analysis

max time kernel
149s
max time network
150s
platform
ubuntu-20.04_amd64
resource
ubuntu2004-amd64-20240508-en
resource tags

arch:amd64arch:i386image:ubuntu2004-amd64-20240508-enkernel:5.4.0-169-genericlocale:en-usos:ubuntu-20.04-amd64system
submitted
12-05-2024 10:31

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General

Target

39a708f0997751f152ecb7690a77dddd_JaffaCakes118
Size

1.1MB
MD5

39a708f0997751f152ecb7690a77dddd
SHA1

8d9b4d82b1cbff29b83c5ad13d64dac197fcf7a5
SHA256

75a39283e00fdd65813efd892522b77c655b920b32637b0c7106a0340d1a97cf
SHA512

75a1d0cc16b2f0023f4c61ed53060fa8c249bbe346a98f3cbdc90e0442172184b48d820866e8223b6be6f23d6d26f4c9435938afa4a88af03e1e71c657f62eef
SSDEEP

24576:4vRE7caCfKGPqVEDNLFxKsfaCI+gIGYuuCol7r:4vREKfPqVE5jKsfaCRHGVo7r

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/knerl	family_mrblack

Executes dropped EXE 2 IoCs

Processes:

knerlpythno

ioc pid process

/usr/bin/bsd-port/knerl 1436 knerl
/usr/bin/pythno 1444 pythno

ioc	pid	process
/usr/bin/bsd-port/knerl	1436	knerl
/usr/bin/pythno	1444	pythno

Modifies init.d 1 TTPs 2 IoCs

Adds/modifies system service, likely for persistence.

persistence

Boot or Logon Autostart Execution

T1547

Processes:

39a708f0997751f152ecb7690a77dddd_JaffaCakes118knerl

description	ioc	process
File opened for modification	/etc/init.d/VsystemsshMdt	39a708f0997751f152ecb7690a77dddd_JaffaCakes118
File opened for modification	/etc/init.d/selinux	knerl

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

System Network Configuration Discovery
T1016

Processes:

knerl

description ioc process

File opened for reading /proc/net/route knerl

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

Write file to user bin folder 1 TTPs 10 IoCs

Hijack Execution Flow

T1574

Processes:

cpknerl39a708f0997751f152ecb7690a77dddd_JaffaCakes118cpcpcpcpcp

description	ioc	process
File opened for modification	/usr/bin/dpkgd/ps	cp
File opened for modification	/usr/bin/bsd-port/conf.n	knerl
File opened for modification	/usr/bin/bsd-port/knerl.conf	39a708f0997751f152ecb7690a77dddd_JaffaCakes118
File opened for modification	/usr/bin/bsd-port/knerl	cp
File opened for modification	/usr/bin/pythno	cp
File opened for modification	/usr/bin/bsd-port/knerl.conf	knerl
File opened for modification	/usr/bin/dpkgd/lsof	cp
File opened for modification	/usr/bin/bsd-port/udevd.conf	39a708f0997751f152ecb7690a77dddd_JaffaCakes118
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:

39a708f0997751f152ecb7690a77dddd_JaffaCakes118knerl

description ioc process

File opened for reading /proc/cpuinfo 39a708f0997751f152ecb7690a77dddd_JaffaCakes118
File opened for reading /proc/cpuinfo knerl

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	39a708f0997751f152ecb7690a77dddd_JaffaCakes118
File opened for reading	/proc/cpuinfo	knerl

Reads system network configuration 1 TTPs 4 IoCs

Uses contents of /proc filesystem to enumerate network settings.

System Network Configuration Discovery

T1016

Processes:

39a708f0997751f152ecb7690a77dddd_JaffaCakes118knerl

description	ioc	process
File opened for reading	/proc/net/dev	39a708f0997751f152ecb7690a77dddd_JaffaCakes118
File opened for reading	/proc/net/dev	knerl
File opened for reading	/proc/net/route	knerl
File opened for reading	/proc/net/arp	knerl

Reads runtime system information 24 IoCs

Reads data from /proc virtual filesystem.

Processes:

pythnocpcp39a708f0997751f152ecb7690a77dddd_JaffaCakes118insmodmkdirmkdircpcpcpknerlmkdirmkdircpcpmkdirmkdirmkdirinsmodcp

description	ioc	process
File opened for reading	/proc/sys/kernel/version	pythno
File opened for reading	/proc/filesystems	cp
File opened for reading	/proc/filesystems	cp
File opened for reading	/proc/sys/kernel/version	39a708f0997751f152ecb7690a77dddd_JaffaCakes118
File opened for reading	/proc/stat	39a708f0997751f152ecb7690a77dddd_JaffaCakes118
File opened for reading	/proc/meminfo	39a708f0997751f152ecb7690a77dddd_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/filesystems	cp
File opened for reading	/proc/filesystems	cp
File opened for reading	/proc/sys/kernel/version	knerl
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/filesystems	mkdir
File opened for reading	/proc/filesystems	mkdir
File opened for reading	/proc/filesystems	mkdir
File opened for reading	/proc/stat	knerl
File opened for reading	/proc/meminfo	knerl
File opened for reading	/proc/cmdline	insmod
File opened for reading	/proc/filesystems	cp

Writes file to tmp directory 7 IoCs

Malware often drops required files in the /tmp directory.

Processes:

pythno39a708f0997751f152ecb7690a77dddd_JaffaCakes118

description	ioc	process
File opened for modification	/tmp/notify.file	pythno
File opened for modification	/tmp/vga.conf	pythno
File opened for modification	/tmp/idus.log	39a708f0997751f152ecb7690a77dddd_JaffaCakes118
File opened for modification	/tmp/apsh.conf	39a708f0997751f152ecb7690a77dddd_JaffaCakes118
File opened for modification	/tmp/vga.conf	39a708f0997751f152ecb7690a77dddd_JaffaCakes118
File opened for modification	/tmp/notify.file	39a708f0997751f152ecb7690a77dddd_JaffaCakes118
File opened for modification	/tmp/idus.log	pythno

/tmp/39a708f0997751f152ecb7690a77dddd_JaffaCakes118
/tmp/39a708f0997751f152ecb7690a77dddd_JaffaCakes118
1⤵
- Modifies init.d
- Write file to user bin folder
- Checks CPU configuration
- Reads system network configuration
- Reads runtime system information
- Writes file to tmp directory
PID:1379

/bin/sh
sh -c "ln -s /etc/init.d/VsystemsshMdt /etc/rc1.d/S97VsystemsshMdt"
2⤵
PID:1420

/usr/bin/ln
ln -s /etc/init.d/VsystemsshMdt /etc/rc1.d/S97VsystemsshMdt
3⤵
PID:1421

/bin/sh
sh -c "ln -s /etc/init.d/VsystemsshMdt /etc/rc2.d/S97VsystemsshMdt"
2⤵
PID:1422

/usr/bin/ln
ln -s /etc/init.d/VsystemsshMdt /etc/rc2.d/S97VsystemsshMdt
3⤵
PID:1423

/bin/sh
sh -c "ln -s /etc/init.d/VsystemsshMdt /etc/rc3.d/S97VsystemsshMdt"
2⤵
PID:1424

/usr/bin/ln
ln -s /etc/init.d/VsystemsshMdt /etc/rc3.d/S97VsystemsshMdt
3⤵
PID:1425

/bin/sh
sh -c "ln -s /etc/init.d/VsystemsshMdt /etc/rc4.d/S97VsystemsshMdt"
2⤵
PID:1426

/usr/bin/ln
ln -s /etc/init.d/VsystemsshMdt /etc/rc4.d/S97VsystemsshMdt
3⤵
PID:1427

/bin/sh
sh -c "ln -s /etc/init.d/VsystemsshMdt /etc/rc5.d/S97VsystemsshMdt"
2⤵
PID:1428

/usr/bin/ln
ln -s /etc/init.d/VsystemsshMdt /etc/rc5.d/S97VsystemsshMdt
3⤵
PID:1429

/bin/sh
sh -c "mkdir -p /usr/bin/bsd-port"
2⤵
PID:1430

/usr/bin/mkdir
mkdir -p /usr/bin/bsd-port
3⤵
- Reads runtime system information
PID:1431

/bin/sh
sh -c "cp -f /tmp/39a708f0997751f152ecb7690a77dddd_JaffaCakes118 /usr/bin/bsd-port/knerl"
2⤵
PID:1432

/usr/bin/cp
cp -f /tmp/39a708f0997751f152ecb7690a77dddd_JaffaCakes118 /usr/bin/bsd-port/knerl
3⤵
- Write file to user bin folder
- Reads runtime system information
PID:1433

/bin/sh
sh -c /usr/bin/bsd-port/knerl
2⤵
PID:1435

/usr/bin/bsd-port/knerl
/usr/bin/bsd-port/knerl
3⤵
- Executes dropped EXE
- Modifies init.d
- Reads system routing table
- Write file to user bin folder
- Checks CPU configuration
- Reads system network configuration
- Reads runtime system information
PID:1436

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc1.d/S99selinux"
4⤵
PID:1455

/usr/bin/ln
ln -s /etc/init.d/selinux /etc/rc1.d/S99selinux
5⤵
PID:1456

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc2.d/S99selinux"
4⤵
PID:1457

/usr/bin/ln
ln -s /etc/init.d/selinux /etc/rc2.d/S99selinux
5⤵
PID:1458

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc3.d/S99selinux"
4⤵
PID:1459

/usr/bin/ln
ln -s /etc/init.d/selinux /etc/rc3.d/S99selinux
5⤵
PID:1460

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc4.d/S99selinux"
4⤵
PID:1461

/usr/bin/ln
ln -s /etc/init.d/selinux /etc/rc4.d/S99selinux
5⤵
PID:1462

/bin/sh
sh -c "ln -s /etc/init.d/selinux /etc/rc5.d/S99selinux"
4⤵
PID:1464

/usr/bin/ln
ln -s /etc/init.d/selinux /etc/rc5.d/S99selinux
5⤵
PID:1465

/bin/sh
sh -c "mkdir -p /usr/bin/dpkgd"
4⤵
PID:1466

/usr/bin/mkdir
mkdir -p /usr/bin/dpkgd
5⤵
- Reads runtime system information
PID:1467

/bin/sh
sh -c "cp -f /bin/lsof /usr/bin/dpkgd/lsof"
4⤵
PID:1468

/usr/bin/cp
cp -f /bin/lsof /usr/bin/dpkgd/lsof
5⤵
- Write file to user bin folder
- Reads runtime system information
PID:1469

/bin/sh
sh -c "mkdir -p /bin"
4⤵
PID:1470

/usr/bin/mkdir
mkdir -p /bin
5⤵
- Reads runtime system information
PID:1471

/bin/sh
sh -c "cp -f /usr/bin/bsd-port/knerl /bin/lsof"
4⤵
PID:1472

/usr/bin/cp
cp -f /usr/bin/bsd-port/knerl /bin/lsof
5⤵
- Writes file to system bin folder
- Reads runtime system information
PID:1473

/bin/sh
sh -c "chmod 0755 /bin/lsof"
4⤵
PID:1474

/usr/bin/chmod
chmod 0755 /bin/lsof
5⤵
PID:1475

/bin/sh
sh -c "cp -f /bin/ps /usr/bin/dpkgd/ps"
4⤵
PID:1476

/usr/bin/cp
cp -f /bin/ps /usr/bin/dpkgd/ps
5⤵
- Write file to user bin folder
- Reads runtime system information
PID:1477

/bin/sh
sh -c "mkdir -p /bin"
4⤵
PID:1478

/usr/bin/mkdir
mkdir -p /bin
5⤵
- Reads runtime system information
PID:1479

/bin/sh
sh -c "cp -f /usr/bin/bsd-port/knerl /bin/ps"
4⤵
PID:1480

/usr/bin/cp
cp -f /usr/bin/bsd-port/knerl /bin/ps
5⤵
- Writes file to system bin folder
- Reads runtime system information
PID:1481

/bin/sh
sh -c "chmod 0755 /bin/ps"
4⤵
PID:1482

/usr/bin/chmod
chmod 0755 /bin/ps
5⤵
PID:1483

/bin/sh
sh -c "mkdir -p /usr/bin"
4⤵
PID:1484

/usr/bin/mkdir
mkdir -p /usr/bin
5⤵
- Reads runtime system information
PID:1485

/bin/sh
sh -c "cp -f /usr/bin/bsd-port/knerl /usr/bin/lsof"
4⤵
PID:1486

/usr/bin/cp
cp -f /usr/bin/bsd-port/knerl /usr/bin/lsof
5⤵
- Write file to user bin folder
- Reads runtime system information
PID:1487

/bin/sh
sh -c "chmod 0755 /usr/bin/lsof"
4⤵
PID:1488

/usr/bin/chmod
chmod 0755 /usr/bin/lsof
5⤵
PID:1489

/bin/sh
sh -c "mkdir -p /usr/bin"
4⤵
PID:1490

/usr/bin/mkdir
mkdir -p /usr/bin
5⤵
- Reads runtime system information
PID:1491

/bin/sh
sh -c "cp -f /usr/bin/bsd-port/knerl /usr/bin/ps"
4⤵
PID:1492

/usr/bin/cp
cp -f /usr/bin/bsd-port/knerl /usr/bin/ps
5⤵
- Write file to user bin folder
- Reads runtime system information
PID:1493

/bin/sh
sh -c "chmod 0755 /usr/bin/ps"
4⤵
PID:1494

/usr/bin/chmod
chmod 0755 /usr/bin/ps
5⤵
PID:1495

/bin/sh
sh -c "insmod /usr/lib/xpacket.ko"
4⤵
PID:1496

/usr/sbin/insmod
insmod /usr/lib/xpacket.ko
5⤵
- Reads runtime system information
PID:1497

/bin/sh
sh -c "mkdir -p /usr/bin"
2⤵
PID:1438

/usr/bin/mkdir
mkdir -p /usr/bin
3⤵
- Reads runtime system information
PID:1439

/bin/sh
sh -c "cp -f /tmp/39a708f0997751f152ecb7690a77dddd_JaffaCakes118 /usr/bin/pythno"
2⤵
PID:1440

/usr/bin/cp
cp -f /tmp/39a708f0997751f152ecb7690a77dddd_JaffaCakes118 /usr/bin/pythno
3⤵
- Write file to user bin folder
- Reads runtime system information
PID:1441

/bin/sh
sh -c /usr/bin/pythno
2⤵
PID:1443

/usr/bin/pythno
/usr/bin/pythno
3⤵
- Executes dropped EXE
- Reads runtime system information
- Writes file to tmp directory
PID:1444

/bin/sh
sh -c "insmod /usr/lib/xpacket.ko"
2⤵
PID:1447

/usr/sbin/insmod
insmod /usr/lib/xpacket.ko
3⤵
- Reads runtime system information
PID:1448

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/VsystemsshMdt
Filesize
64B

MD5
7f9e7c206ac973ea5b4ec6ceabb6374d

SHA1
c85ae76d48ee9dcf28835c293d6743992ea1d413

SHA256
744ba81ebc76dba09791db6cebd20bd737c8b2bc0d77f01823865de34c4370a5

SHA512
a376f1e64c0a11894abd7a813e00f6edd269fc5c1ccdb2d0d908e98ba085ef8239b06c85762b72521afb5d4408e2b8bd9dace1dad27c3c1edffd573785aaeefb

Download Submit
/etc/init.d/selinux
Filesize
36B

MD5
caa27b819c9303446f702929874a00e8

SHA1
d24199c0e376edea3f822b215148cc0dc78364bf

SHA256
da9b535a14c6d9152857e211f14fb8da9056e84ba1b8d4dc27ab79c98264050b

SHA512
dcd9413eb2cb24d77f637edfc00ca0bb42229a1a3b0d84e29eff94a7b91aee6ee8c126c286a4b4103e01834d1c6aec9de09ffab3927e8de8015421005f31446e

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/tmp/idus.log
Filesize
4B

MD5
b265ce60fe4c5384e622b09eb829b8df

SHA1
b8509b02cc4c001875e9fcb20f3c7c0df970b5a0

SHA256
146c09db1bc3d53de430b2539d042fc870a84996071db58de8b8cf2099bbebc6

SHA512
ba3eda3088ddadf7fc68953b02601a1398a083cdf4b52a32d31f53aa82ac48904a0fc6264e5876719fb8f01ae41bcc38c8581086abb14d607dcd02bf3c75a244

Download Submit
/tmp/notify.file
Filesize
51B

MD5
2b00e9b6e7109e0aea56f7f3c54bc5bb

SHA1
039de114e7b8b9fa5ed51863a4937620a85042f6

SHA256
deb529fece344849c0d1a442988197224c5f31b088b969f1711b9d8a432681a2

SHA512
73fbbe17e569ad89f6109992abcc4233b5c198f3b2837f25139580b3d920f810713c435bada22ff3dd100ccab6d781671d984ec04c800e8ce1d35bbf28821782

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/tmp/vga.conf
Filesize
4B

MD5
ea8fcd92d59581717e06eb187f10666d

SHA1
b5883dc5a6e6b2ff4594aa6ca86cf5739a5ab5e2

SHA256
aecef364029f6f3f008b4f2b87b9a1c27e596a74062b83cad24fab73cce4f1f0

SHA512
e96e9a975b2b19c32bb03a5fc26f7a85d1a54a6c180d50e00eadd40a519714f56f3bd6b68c8105942275265e059906806aa5cbbaf72ba1e73d2c1dd920e8e1fe

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/usr/bin/bsd-port/conf.n
Filesize
69B

MD5
98f7868b1d672db13c553f8961abc70d

SHA1
591895eb33e70d40cf634980b573c9bbdc5f25c7

SHA256
19725ae3b1111de5679167fe037808ba436dccc5a742bd388ed4c5159539542a

SHA512
413a0fb82873659678b9dfbfc93ffdc39562bb3b7f4ab387e4e17586fc9a5eeb43a09f9f68fe44d16d9167cce3a48f2ae09bea10d2f1db141668a1fb57ea9560

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/usr/bin/bsd-port/knerl
Filesize
1.1MB

MD5
39a708f0997751f152ecb7690a77dddd

SHA1
8d9b4d82b1cbff29b83c5ad13d64dac197fcf7a5

SHA256
75a39283e00fdd65813efd892522b77c655b920b32637b0c7106a0340d1a97cf

SHA512
75a1d0cc16b2f0023f4c61ed53060fa8c249bbe346a98f3cbdc90e0442172184b48d820866e8223b6be6f23d6d26f4c9435938afa4a88af03e1e71c657f62eef

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/usr/bin/dpkgd/lsof
Filesize
171KB

MD5
061386937ec7acf924438a2643a32be0

SHA1
01a044b9e58839bea3e58c66cb32acc16241bf91

SHA256
8a26bbae9eb85aa98ef29cfe5b0a291234db6eb394c3e0c2841983dcf7dda959

SHA512
2de2e56ac4c32f47b4a1945ccfb0db378e6d59019ee8004e3e5d2ec8935efb5aa8ee14b8a0b21c61a267e195d42a3232a6dcade8720de06118fd579277f59db7

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/usr/bin/dpkgd/ps
Filesize
134KB

MD5
d194576b899af45b1d2a448612ec21e5

SHA1
492f7d8f28cd4397ce22fcf0d8bf3304ea93465a

SHA256
a8cf81f3a1137c999c3cf336507ce120b3065e633ade01db6280d427b7d986ca

SHA512
b323babd9580b91772cde29c9f22ae75b27f5ce8ce0268a48ca41713c3545dd72409932a5c48f6af66ac6e43127eb5461d1f686bd667fa1b0e56a1564db3c539

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