ce0f1914e0f0748f85ecc18d8470de2a0b2b60be7eaab7a459899f77993e82e6

Resubmissions

05-04-2023 10:12

230405-l8jr6ada75 10

28-03-2023 02:03

230328-cg4htagd66 10

Analysis

max time kernel
0s
max time network
147s
platform
ubuntu-18.04_amd64
resource
ubuntu1804-amd64-20221111-en
resource tags

arch:amd64arch:i386image:ubuntu1804-amd64-20221111-enkernel:4.15.0-161-genericlocale:en-usos:ubuntu-18.04-amd64system
submitted
28-03-2023 02:03

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General

Target

yxbitkdccc_.elf
Size

611KB
MD5

a2279a054fba006fd74c3b61ddc6a3ef
SHA1

df2a4c91d86be560c7c19628923b601af460258d
SHA256

ce0f1914e0f0748f85ecc18d8470de2a0b2b60be7eaab7a459899f77993e82e6
SHA512

089bf2ef2926e6cdd93412ce006fb06cf8c75f60c9adb475c4798532b2214e083b4d1a6dd29b864a77c9744a953e67a40c2dc7195661682cfaa268c549e9cbe5
SSDEEP

12288:FBXOvdwV1/n/dQFhWlH/c1dHo4h9L+zNZrryT6yF8EEP4UlUuTh1AR:FBXmkN/+Fhu/Qo4h9L+zNNyBVEBl/91I

Score

9^/10

persistence

Malware Config

Signatures

Writes file to system bin folder 1 TTPs 6 IoCs

Hijack Execution Flow

T1574

Processes:

description	ioc
/bin/zytlfltzey	/bin/zytlfltzey
/bin/nzapgyhvyp	/bin/nzapgyhvyp
/bin/sgtgzjbrnf	/bin/sgtgzjbrnf
/bin/rcmlnepbxp	/bin/rcmlnepbxp
/bin/vsgbdpsqxr	/bin/vsgbdpsqxr
/bin/iktmnhnuux	/bin/iktmnhnuux

Creates/modifies Cron job 1 TTPs 2 IoCs
Cron allows running tasks on a schedule, and is commonly used for malware persistence.
persistence

Scheduled Task
T1053

Processes:

sedsh

description ioc process

/etc/crontab /etc/crontab sed
/etc/crontab /etc/crontab sh

description	ioc	process
/etc/crontab	/etc/crontab	sed
/etc/crontab	/etc/crontab	sh

Modifies rc script 1 TTPs 12 IoCs

Adding/modifying system rc scripts is a common persistence mechanism.

persistence

Boot or Logon Autostart Execution

T1547

Processes:

update-rc.d

description	ioc
/etc/rc3.d/S90yxbitkdccc_.elf	/etc/rc3.d/S90yxbitkdccc_.elf
/etc/rc5.d/	/etc/rc5.d/	update-rc.d
/etc/rc3.d/	/etc/rc3.d/	update-rc.d
/etc/rc2.d/	/etc/rc2.d/	update-rc.d
/etc/rc6.d/	/etc/rc6.d/	update-rc.d
/etc/rc1.d/S90yxbitkdccc_.elf	/etc/rc1.d/S90yxbitkdccc_.elf
/etc/rc2.d/S90yxbitkdccc_.elf	/etc/rc2.d/S90yxbitkdccc_.elf
/etc/rc4.d/S90yxbitkdccc_.elf	/etc/rc4.d/S90yxbitkdccc_.elf
/etc/rc5.d/S90yxbitkdccc_.elf	/etc/rc5.d/S90yxbitkdccc_.elf
/etc/rc0.d/	/etc/rc0.d/	update-rc.d
/etc/rc4.d/	/etc/rc4.d/	update-rc.d
/etc/rc1.d/	/etc/rc1.d/	update-rc.d

Write file to user bin folder 1 TTPs 8 IoCs

Hijack Execution Flow

T1574

Processes:

update-rc.d

description	ioc
/usr/bin/zytlfltzey	/usr/bin/zytlfltzey
/usr/bin/nzapgyhvyp	/usr/bin/nzapgyhvyp
/usr/bin/sgtgzjbrnf	/usr/bin/sgtgzjbrnf
/usr/bin/rcmlnepbxp	/usr/bin/rcmlnepbxp
/usr/bin/nlrceovhba	/usr/bin/nlrceovhba
/usr/sbin/update-rc.d	/usr/sbin/update-rc.d	update-rc.d
/usr/bin/vsgbdpsqxr	/usr/bin/vsgbdpsqxr
/usr/bin/iktmnhnuux	/usr/bin/iktmnhnuux

Reads runtime system information 7 IoCs

Reads data from /proc virtual filesystem.

Processes:

systemctlsed

description	ioc	process
/proc/1/environ	/proc/1/environ	systemctl
/proc/1/sched	/proc/1/sched	systemctl
/proc/cmdline	/proc/cmdline	systemctl
/proc/filesystems	/proc/filesystems	sed
/proc/filesystems	/proc/filesystems	systemctl
/proc/self/stat	/proc/self/stat	systemctl
/proc/sys/kernel/osrelease	/proc/sys/kernel/osrelease	systemctl

Writes file to tmp directory 6 IoCs

Malware often drops required files in the /tmp directory.

Processes:

description	ioc
/tmp/sgtgzjbrnf	/tmp/sgtgzjbrnf
/tmp/rcmlnepbxp	/tmp/rcmlnepbxp
/tmp/vsgbdpsqxr	/tmp/vsgbdpsqxr
/tmp/iktmnhnuux	/tmp/iktmnhnuux
/tmp/zytlfltzey	/tmp/zytlfltzey
/tmp/nzapgyhvyp	/tmp/nzapgyhvyp

/tmp/yxbitkdccc_.elf
/tmp/yxbitkdccc_.elf
1⤵
PID:587

/bin/chkconfig
chkconfig --add yxbitkdccc_.elf
1⤵
PID:590

/sbin/chkconfig
chkconfig --add yxbitkdccc_.elf
1⤵
PID:590

/usr/bin/chkconfig
chkconfig --add yxbitkdccc_.elf
1⤵
PID:590

/usr/sbin/chkconfig
chkconfig --add yxbitkdccc_.elf
1⤵
PID:590

/usr/local/bin/chkconfig
chkconfig --add yxbitkdccc_.elf
1⤵
PID:590

/usr/local/sbin/chkconfig
chkconfig --add yxbitkdccc_.elf
1⤵
PID:590

/usr/X11R6/bin/chkconfig
chkconfig --add yxbitkdccc_.elf
1⤵
PID:590

/bin/sh
sh -c "sed -i '/\\/etc\\/cron.hourly\\/gcc.sh/d' /etc/crontab && echo '*/3 * * * * root /etc/cron.hourly/gcc.sh' >> /etc/crontab"
1⤵
- Creates/modifies Cron job
PID:593

/bin/sed
sed -i "/\\/etc\\/cron.hourly\\/gcc.sh/d" /etc/crontab
2⤵
- Creates/modifies Cron job
- Reads runtime system information
PID:594

/bin/update-rc.d
update-rc.d yxbitkdccc_.elf defaults
1⤵
PID:592

/sbin/update-rc.d
update-rc.d yxbitkdccc_.elf defaults
1⤵
PID:592

/usr/bin/update-rc.d
update-rc.d yxbitkdccc_.elf defaults
1⤵
PID:592

/usr/sbin/update-rc.d
update-rc.d yxbitkdccc_.elf defaults
1⤵
- Modifies rc script
- Write file to user bin folder
PID:592

/bin/systemctl
systemctl daemon-reload
2⤵
- Reads runtime system information
PID:598

/usr/bin/iktmnhnuux
/usr/bin/iktmnhnuux ifconfig 588
1⤵
PID:619

/usr/bin/iktmnhnuux
/usr/bin/iktmnhnuux "netstat -an" 588
1⤵
PID:622

/usr/bin/iktmnhnuux
/usr/bin/iktmnhnuux "ps -ef" 588
1⤵
PID:625

/usr/bin/iktmnhnuux
/usr/bin/iktmnhnuux id 588
1⤵
PID:628

/usr/bin/iktmnhnuux
/usr/bin/iktmnhnuux "grep \"A\"" 588
1⤵
PID:631

/usr/bin/zytlfltzey
/usr/bin/zytlfltzey "sleep 1" 588
1⤵
PID:634

/usr/bin/zytlfltzey
/usr/bin/zytlfltzey "ps -ef" 588
1⤵
PID:637

/usr/bin/zytlfltzey
/usr/bin/zytlfltzey bash 588
1⤵
PID:640

/usr/bin/zytlfltzey
/usr/bin/zytlfltzey "grep \"A\"" 588
1⤵
PID:643

/usr/bin/zytlfltzey
/usr/bin/zytlfltzey who 588
1⤵
PID:646

/usr/bin/nzapgyhvyp
/usr/bin/nzapgyhvyp "route -n" 588
1⤵
PID:649

/usr/bin/nzapgyhvyp
/usr/bin/nzapgyhvyp sh 588
1⤵
PID:652

/usr/bin/nzapgyhvyp
/usr/bin/nzapgyhvyp "netstat -an" 588
1⤵
PID:655

/usr/bin/nzapgyhvyp
/usr/bin/nzapgyhvyp pwd 588
1⤵
PID:658

/usr/bin/nzapgyhvyp
/usr/bin/nzapgyhvyp "netstat -antop" 588
1⤵
PID:661

/usr/bin/sgtgzjbrnf
/usr/bin/sgtgzjbrnf "netstat -antop" 588
1⤵
PID:664

/usr/bin/sgtgzjbrnf
/usr/bin/sgtgzjbrnf su 588
1⤵
PID:667

/usr/bin/sgtgzjbrnf
/usr/bin/sgtgzjbrnf gnome-terminal 588
1⤵
PID:670

/usr/bin/sgtgzjbrnf
/usr/bin/sgtgzjbrnf ls 588
1⤵
PID:673

/usr/bin/sgtgzjbrnf
/usr/bin/sgtgzjbrnf "grep \"A\"" 588
1⤵
PID:676

/usr/bin/rcmlnepbxp
/usr/bin/rcmlnepbxp "netstat -an" 588
1⤵
PID:679

/usr/bin/rcmlnepbxp
/usr/bin/rcmlnepbxp uptime 588
1⤵
PID:682

/usr/bin/rcmlnepbxp
/usr/bin/rcmlnepbxp ifconfig 588
1⤵
PID:685

/usr/bin/rcmlnepbxp
/usr/bin/rcmlnepbxp ls 588
1⤵
PID:688

/usr/bin/rcmlnepbxp
/usr/bin/rcmlnepbxp gnome-terminal 588
1⤵
PID:691

/usr/bin/nlrceovhba
/usr/bin/nlrceovhba "ifconfig eth0" 588
1⤵
PID:694

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Hijack Execution Flow

T1574

Scheduled Task

T1053

Boot or Logon Autostart Execution

T1547

Privilege Escalation

Hijack Execution Flow

T1574

Scheduled Task

T1053

Boot or Logon Autostart Execution

T1547

Defense Evasion

Hijack Execution Flow

T1574

Credential Access

Discovery

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resubmissions

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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