2d9bb4e3fddfe5dc51c54cba74a1eb594c7be9d34774524d972350edd85e6499

Resubmissions

08-02-2024 01:32

240208-bx7pqsbg96 10

27-01-2024 14:19

240127-rmwgqadhc4 10

Analysis

max time kernel
154s
max time network
161s
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
27-01-2024 14:19

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General

Target

The-MALWARE-Repo-master/The-MALWARE-Repo-master/Botnets/FritzFrog/90b61cc77bb2d726219fd00ae2d0ecdf6f
Size

8.7MB
MD5

100bff2f4ee4d88b005bb016daa04fe6
SHA1

36e5f8f70890601aa2adaffb203afd06516097f0
SHA256

90b61cc77bb2d726219fd00ae2d0ecdf6f0fe7078529e87b7ec8e603008232d5
SHA512

a1cb52bc6edaa7f8bb216d2a5f3deb0b8468c64b43931ef570c05e6a9872c63f00aff50d69686fdc2ea25d3d83da4bf9d78f5e6910643163570d0bd6279c6e16
SSDEEP

98304:wRINZeR9Zy031d3eDi2dZQT3/S1GVlOre53ziKZ7Xk:wRINZeR9Zx1CFDQD/SQVlOrKr

Score

8^/10

antivm persistence

Malware Config

Signatures

Adds new SSH keys 2 IoCs

Linux special file to hold SSH keys. The threat actor may add new keys for further remote access.

persistence

Processes:

90b61cc77bb2d726219fd00ae2d0ecdf6f

description	ioc	process
File opened for modification	/root/.ssh/authorized_keys	90b61cc77bb2d726219fd00ae2d0ecdf6f
File opened for modification	/root/.ssh/authorized_keys

Deletes itself 1 IoCs

Processes:

pid

1547
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:

cat

description ioc process

File opened for reading /proc/cpuinfo cat

pid
1547

description	ioc	process
File opened for reading	/proc/cpuinfo	cat

Deletes log files 1 TTPs 2 IoCs

Deletes log files on the system.

Indicator Removal

T1070

Processes:

90b61cc77bb2d726219fd00ae2d0ecdf6f

description	ioc
File deleted	/var/log/tmp/The-MALWARE-Repo-master/The-MALWARE-Repo-master/Botnets/FritzFrog/90b61cc77bb2d726219fd00ae2d0ecdf6f
File deleted	/var/log/tmp/The-MALWARE-Repo-master/The-MALWARE-Repo-master/Botnets/FritzFrog/90b61cc77bb2d726219fd00ae2d0ecdf6f	90b61cc77bb2d726219fd00ae2d0ecdf6f

Enumerates running processes
Discovers information about currently running processes on the system

Reads CPU attributes 1 TTPs 30 IoCs

System Information Discovery

T1082

Processes:

freefreefreeuptimefreeuptimefreefreeuptimeuptimefreeuptimeuptimefreefreeuptimeuptimefreeuptimeuptimefreefreefreeuptimefreeuptimefreeuptimeuptimeuptime

description	ioc	process
File opened for reading	/sys/devices/system/cpu/online	free
File opened for reading	/sys/devices/system/cpu/online	free
File opened for reading	/sys/devices/system/cpu/online	free
File opened for reading	/sys/devices/system/cpu/online	uptime
File opened for reading	/sys/devices/system/cpu/online	free
File opened for reading	/sys/devices/system/cpu/online	uptime
File opened for reading	/sys/devices/system/cpu/online	free
File opened for reading	/sys/devices/system/cpu/online	free
File opened for reading	/sys/devices/system/cpu/online	uptime
File opened for reading	/sys/devices/system/cpu/online	uptime
File opened for reading	/sys/devices/system/cpu/online	free
File opened for reading	/sys/devices/system/cpu/online	uptime
File opened for reading	/sys/devices/system/cpu/online	uptime
File opened for reading	/sys/devices/system/cpu/online	free
File opened for reading	/sys/devices/system/cpu/online	free
File opened for reading	/sys/devices/system/cpu/online	uptime
File opened for reading	/sys/devices/system/cpu/online	uptime
File opened for reading	/sys/devices/system/cpu/online	free
File opened for reading	/sys/devices/system/cpu/online	uptime
File opened for reading	/sys/devices/system/cpu/online	uptime
File opened for reading	/sys/devices/system/cpu/online	free
File opened for reading	/sys/devices/system/cpu/online	free
File opened for reading	/sys/devices/system/cpu/online	free
File opened for reading	/sys/devices/system/cpu/online	uptime
File opened for reading	/sys/devices/system/cpu/online	free
File opened for reading	/sys/devices/system/cpu/online	uptime
File opened for reading	/sys/devices/system/cpu/online	free
File opened for reading	/sys/devices/system/cpu/online	uptime
File opened for reading	/sys/devices/system/cpu/online	uptime
File opened for reading	/sys/devices/system/cpu/online	uptime

Reads runtime system information 64 IoCs

Reads data from /proc virtual filesystem.

Processes:

90b61cc77bb2d726219fd00ae2d0ecdf6fuptimefreefreeuptimeuptimeuptimeuptime

description	ioc	process
File opened for reading	/proc/1540/cmdline	90b61cc77bb2d726219fd00ae2d0ecdf6f
File opened for reading	/proc/25/stat
File opened for reading	/proc/1/stat	90b61cc77bb2d726219fd00ae2d0ecdf6f
File opened for reading	/proc/318/cmdline
File opened for reading	/proc/sys/kernel/osrelease	uptime
File opened for reading	/proc/166/stat
File opened for reading	/proc/loadavg	uptime
File opened for reading	/proc/20/cmdline
File opened for reading	/proc/422/stat	90b61cc77bb2d726219fd00ae2d0ecdf6f
File opened for reading	/proc/158/stat	90b61cc77bb2d726219fd00ae2d0ecdf6f
File opened for reading	/proc/171/stat	90b61cc77bb2d726219fd00ae2d0ecdf6f
File opened for reading	/proc/meminfo	free
File opened for reading	/proc/89/cmdline
File opened for reading	/proc/1071/stat	90b61cc77bb2d726219fd00ae2d0ecdf6f
File opened for reading	/proc/1159/stat	90b61cc77bb2d726219fd00ae2d0ecdf6f
File opened for reading	/proc/163/stat	90b61cc77bb2d726219fd00ae2d0ecdf6f
File opened for reading	/proc/24/stat	90b61cc77bb2d726219fd00ae2d0ecdf6f
File opened for reading	/proc/1073/stat	90b61cc77bb2d726219fd00ae2d0ecdf6f
File opened for reading	/proc/440/stat	90b61cc77bb2d726219fd00ae2d0ecdf6f
File opened for reading	/proc/1172/cmdline	90b61cc77bb2d726219fd00ae2d0ecdf6f
File opened for reading	/proc/1335/cmdline	90b61cc77bb2d726219fd00ae2d0ecdf6f
File opened for reading	/proc/1150/cmdline
File opened for reading	/proc/1261/cmdline
File opened for reading	/proc/199/cmdline
File opened for reading	/proc/472/stat	90b61cc77bb2d726219fd00ae2d0ecdf6f
File opened for reading	/proc/572/cmdline
File opened for reading	/proc/457/stat	90b61cc77bb2d726219fd00ae2d0ecdf6f
File opened for reading	/proc/uptime	uptime
File opened for reading	/proc/1016/cmdline
File opened for reading	/proc/1315/stat
File opened for reading	/proc/1068/stat	90b61cc77bb2d726219fd00ae2d0ecdf6f
File opened for reading	/proc/1344/cmdline
File opened for reading	/proc/1538/cmdline
File opened for reading	/proc/85/cmdline	90b61cc77bb2d726219fd00ae2d0ecdf6f
File opened for reading	/proc/31/stat	90b61cc77bb2d726219fd00ae2d0ecdf6f
File opened for reading	/proc/34/stat
File opened for reading	/proc/sys/kernel/osrelease	free
File opened for reading	/proc/1080/stat	90b61cc77bb2d726219fd00ae2d0ecdf6f
File opened for reading	/proc/5/stat	90b61cc77bb2d726219fd00ae2d0ecdf6f
File opened for reading	/proc/uptime	uptime
File opened for reading	/proc/sys/kernel/osrelease	uptime
File opened for reading	/proc/1200/stat	90b61cc77bb2d726219fd00ae2d0ecdf6f
File opened for reading	/proc/165/stat	90b61cc77bb2d726219fd00ae2d0ecdf6f
File opened for reading	/proc/318/stat	90b61cc77bb2d726219fd00ae2d0ecdf6f
File opened for reading	/proc/199/cmdline	90b61cc77bb2d726219fd00ae2d0ecdf6f
File opened for reading	/proc/uptime	uptime
File opened for reading	/proc/1141/cmdline
File opened for reading	/proc/34/cmdline
File opened for reading	/proc/1297/cmdline	90b61cc77bb2d726219fd00ae2d0ecdf6f
File opened for reading	/proc/1556/cmdline	90b61cc77bb2d726219fd00ae2d0ecdf6f
File opened for reading	/proc/129/cmdline
File opened for reading	/proc/437/stat	90b61cc77bb2d726219fd00ae2d0ecdf6f
File opened for reading	/proc/1016/cmdline	90b61cc77bb2d726219fd00ae2d0ecdf6f
File opened for reading	/proc/sys/kernel/osrelease	uptime
File opened for reading	/proc/1544/cmdline
File opened for reading	/proc/1091/stat	90b61cc77bb2d726219fd00ae2d0ecdf6f
File opened for reading	/proc/640/cmdline	90b61cc77bb2d726219fd00ae2d0ecdf6f
File opened for reading	/proc/15/cmdline
File opened for reading	/proc/81/cmdline
File opened for reading	/proc/31/stat
File opened for reading	/proc/1021/cmdline
File opened for reading	/proc/170/stat
File opened for reading	/proc/165/cmdline
File opened for reading	/proc/431/stat

/tmp/The-MALWARE-Repo-master/The-MALWARE-Repo-master/Botnets/FritzFrog/90b61cc77bb2d726219fd00ae2d0ecdf6f
/tmp/The-MALWARE-Repo-master/The-MALWARE-Repo-master/Botnets/FritzFrog/90b61cc77bb2d726219fd00ae2d0ecdf6f
1⤵
- Adds new SSH keys
- Deletes log files
- Reads runtime system information
PID:1544

/usr/bin/free
free -m
2⤵
- Reads CPU attributes
PID:1566

/usr/bin/uptime
uptime
2⤵
- Reads CPU attributes
PID:1567

/usr/bin/free
free -m
2⤵
- Reads CPU attributes
- Reads runtime system information
PID:1572

/usr/bin/uptime
uptime
2⤵
- Reads CPU attributes
PID:1573

/usr/bin/free
free -m
2⤵
- Reads CPU attributes
PID:1576

/usr/bin/uptime
uptime
2⤵
- Reads CPU attributes
PID:1577

/usr/bin/free
free -m
2⤵
- Reads CPU attributes
PID:1580

/usr/bin/uptime
uptime
2⤵
- Reads CPU attributes
- Reads runtime system information
PID:1581

/usr/bin/free
free -m
2⤵
- Reads CPU attributes
PID:1584

/usr/bin/uptime
uptime
2⤵
- Reads CPU attributes
PID:1585

/usr/bin/free
free -m
2⤵
- Reads CPU attributes
PID:1588

/usr/bin/uptime
uptime
2⤵
- Reads CPU attributes
PID:1589

/usr/bin/free
free -m
2⤵
- Reads CPU attributes
PID:1592

/usr/bin/uptime
uptime
2⤵
- Reads CPU attributes
- Reads runtime system information
PID:1593

/bin/uname
uname -a
1⤵
PID:1555

/bin/cat
cat /proc/cpuinfo
1⤵
- Checks CPU configuration
PID:1559

/bin/cat
cat /etc/issue
1⤵
PID:1560

/usr/bin/free
free -m
1⤵
- Reads CPU attributes
PID:1561

/usr/bin/uptime
uptime
1⤵
- Reads CPU attributes
PID:1562

/bin/journalctl
journalctl -S "@0" -u sshd
1⤵
PID:1563

/bin/cat
cat "/var/log/auth*"
1⤵
PID:1564

/bin/zcat
zcat "/var/log/auth*"
1⤵
PID:1565

/bin/gzip
gzip -cd "/var/log/auth*"
1⤵
PID:1565

/usr/bin/free
free -m
1⤵
- Reads CPU attributes
PID:1568

/usr/bin/uptime
uptime
1⤵
- Reads CPU attributes
PID:1569

/usr/bin/free
free -m
1⤵
- Reads CPU attributes
- Reads runtime system information
PID:1574

/usr/bin/uptime
uptime
1⤵
- Reads CPU attributes
PID:1575

/usr/bin/free
free -m
1⤵
- Reads CPU attributes
PID:1578

/usr/bin/uptime
uptime
1⤵
- Reads CPU attributes
PID:1579

/usr/bin/free
free -m
1⤵
- Reads CPU attributes
PID:1582

/usr/bin/uptime
uptime
1⤵
- Reads CPU attributes
- Reads runtime system information
PID:1583

/usr/bin/free
free -m
1⤵
- Reads CPU attributes
PID:1586

/usr/bin/uptime
uptime
1⤵
- Reads CPU attributes
- Reads runtime system information
PID:1587

/usr/bin/free
free -m
1⤵
- Reads CPU attributes
PID:1590

/usr/bin/uptime
uptime
1⤵
- Reads CPU attributes
PID:1591

/usr/bin/free
free -m
1⤵
- Reads CPU attributes
PID:1594

/usr/bin/uptime
uptime
1⤵
- Reads CPU attributes
- Reads runtime system information
PID:1595

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Virtualization/Sandbox Evasion

T1497

Indicator Removal

T1070

Credential Access

Discovery

Virtualization/Sandbox Evasion

T1497

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

/root/.ssh/authorized_keys
Filesize
381B

MD5
9da18d38b6dd4c4aa84642378d63fa89

SHA1
c5a976691e4b5963b5e760044f22cc9685268db6

SHA256
43062900b2539d8d1f67f30fa7042c56b53541f63875b5f0de5d8fbde0e0a8bf

SHA512
222b20b5b2ff8956c13dbac1f8d3f81435613b751913d65f4c4082ea9c1a7c8ae91be17a24ef4ae0c708bfe09daab552bb209615714d70acfaaed89c536c71b3

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