2d9bb4e3fddfe5dc51c54cba74a1eb594c7be9d34774524d972350edd85e6499

Resubmissions

08-02-2024 01:32

240208-bx7pqsbg96 10

27-01-2024 14:19

240127-rmwgqadhc4 10

Analysis

max time kernel
153s
max time network
151s
platform
ubuntu-18.04_amd64
resource
ubuntu1804-amd64-20231222-en
resource tags

arch:amd64arch:i386image:ubuntu1804-amd64-20231222-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/2378e76aba1ad6e0c937fb39989217bf0d
Size

8.7MB
MD5

3a371a09bfcba3d545465339f1e1d481
SHA1

7f5712878929aab6a2ab297072a5a5f3d3c15a01
SHA256

2378e76aba1ad6e0c937fb39989217bf0de616fdad4726c0f4233bf5414cde86
SHA512

35efc5129316ea697f1f4591c37e70c74b643942cdb3cb1aac6a0f14f5d133da39c0c393439490bc059361e9feeacee3d4056f88700f56dfe1088ba0ab22613b
SSDEEP

98304:f/VrKprvLVtb8E0dD71puy219CZ2gT3/3Khbw+Aw:3VrKpjROndH1puy219CZBShb

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:

2378e76aba1ad6e0c937fb39989217bf0d

description	ioc	process
File opened for modification	/root/.ssh/authorized_keys	2378e76aba1ad6e0c937fb39989217bf0d
File opened for modification	/root/.ssh/authorized_keys

Deletes itself 1 IoCs

Processes:

2378e76aba1ad6e0c937fb39989217bf0d

pid process

1613 2378e76aba1ad6e0c937fb39989217bf0d
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	process
1613	2378e76aba1ad6e0c937fb39989217bf0d

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:

2378e76aba1ad6e0c937fb39989217bf0d

description	ioc	process
File deleted	/var/log/tmp/The-MALWARE-Repo-master/The-MALWARE-Repo-master/Botnets/FritzFrog/2378e76aba1ad6e0c937fb39989217bf0d	2378e76aba1ad6e0c937fb39989217bf0d
File deleted	/var/log/tmp/The-MALWARE-Repo-master/The-MALWARE-Repo-master/Botnets/FritzFrog/2378e76aba1ad6e0c937fb39989217bf0d

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

Reads CPU attributes 1 TTPs 30 IoCs

System Information Discovery

T1082

Processes:

uptimeuptimefreeuptimefreefreefreeuptimeuptimeuptimefreeuptimefreefreeuptimeuptimefreefreefreeuptimefreeuptimeuptimefreeuptimefreeuptimefreefreeuptime

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

Enumerates kernel/hardware configuration 1 TTPs 1 IoCs
Reads contents of /sys virtual filesystem to enumerate system information.

System Information Discovery
T1082

Processes:

2378e76aba1ad6e0c937fb39989217bf0d

description ioc process

File opened for reading /sys/kernel/mm/transparent_hugepage/hpage_pmd_size 2378e76aba1ad6e0c937fb39989217bf0d

description	ioc	process
File opened for reading	/sys/kernel/mm/transparent_hugepage/hpage_pmd_size	2378e76aba1ad6e0c937fb39989217bf0d

Reads runtime system information 64 IoCs

Reads data from /proc virtual filesystem.

Processes:

2378e76aba1ad6e0c937fb39989217bf0duptimeuptimeuptimeuptimeuptimeuptimefreefreeuptimefreeuptimefree

description	ioc
File opened for reading	/proc/999/stat
File opened for reading	/proc/stat	2378e76aba1ad6e0c937fb39989217bf0d
File opened for reading	/proc/1062/cmdline
File opened for reading	/proc/1168/cmdline
File opened for reading	/proc/1442/cmdline
File opened for reading	/proc/1631/stat
File opened for reading	/proc/1029/cmdline
File opened for reading	/proc/156/stat
File opened for reading	/proc/sys/kernel/osrelease	uptime
File opened for reading	/proc/loadavg	uptime
File opened for reading	/proc/1152/cmdline
File opened for reading	/proc/13/stat
File opened for reading	/proc/sys/kernel/osrelease	uptime
File opened for reading	/proc/1623/cmdline
File opened for reading	/proc/1168/stat
File opened for reading	/proc/1601/stat
File opened for reading	/proc/166/stat
File opened for reading	/proc/431/stat
File opened for reading	/proc/5/stat
File opened for reading	/proc/574/stat
File opened for reading	/proc/26/cmdline
File opened for reading	/proc/1349/stat
File opened for reading	/proc/1388/stat
File opened for reading	/proc/24/stat
File opened for reading	/proc/sys/kernel/osrelease	uptime
File opened for reading	/proc/loadavg	uptime
File opened for reading	/proc/160/stat
File opened for reading	/proc/511/stat
File opened for reading	/proc/1181/cmdline
File opened for reading	/proc/173/cmdline
File opened for reading	/proc/36/stat
File opened for reading	/proc/1316/cmdline
File opened for reading	/proc/166/cmdline
File opened for reading	/proc/512/cmdline
File opened for reading	/proc/loadavg	uptime
File opened for reading	/proc/sys/kernel/osrelease	free
File opened for reading	/proc/22/cmdline
File opened for reading	/proc/34/cmdline
File opened for reading	/proc/999/cmdline
File opened for reading	/proc/meminfo	free
File opened for reading	/proc/160/cmdline
File opened for reading	/proc/uptime	uptime
File opened for reading	/proc/sys/net/core/somaxconn	2378e76aba1ad6e0c937fb39989217bf0d
File opened for reading	/proc/1079/cmdline
File opened for reading	/proc/1142/cmdline
File opened for reading	/proc/1605/cmdline
File opened for reading	/proc/1029/stat
File opened for reading	/proc/18/stat
File opened for reading	/proc/613/stat
File opened for reading	/proc/1437/stat
File opened for reading	/proc/stat
File opened for reading	/proc/168/cmdline
File opened for reading	/proc/1189/stat
File opened for reading	/proc/165/stat
File opened for reading	/proc/7/stat
File opened for reading	/proc/meminfo	free
File opened for reading	/proc/807/cmdline
File opened for reading	/proc/1603/stat
File opened for reading	/proc/uptime	uptime
File opened for reading	/proc/1167/cmdline
File opened for reading	/proc/18/cmdline
File opened for reading	/proc/723/cmdline
File opened for reading	/proc/meminfo	free
File opened for reading	/proc/10/cmdline

/tmp/The-MALWARE-Repo-master/The-MALWARE-Repo-master/Botnets/FritzFrog/2378e76aba1ad6e0c937fb39989217bf0d
/tmp/The-MALWARE-Repo-master/The-MALWARE-Repo-master/Botnets/FritzFrog/2378e76aba1ad6e0c937fb39989217bf0d
1⤵
- Adds new SSH keys
- Deletes itself
- Deletes log files
- Enumerates kernel/hardware configuration
- Reads runtime system information
PID:1613

/bin/uname
uname -a
2⤵
PID:1622

/bin/cat
cat /proc/cpuinfo
2⤵
- Checks CPU configuration
PID:1627

/bin/cat
cat /etc/issue
2⤵
PID:1628

/usr/bin/free
free -m
2⤵
- Reads CPU attributes
PID:1629

/usr/bin/uptime
uptime
2⤵
- Reads CPU attributes
PID:1630

/bin/journalctl
journalctl -S "@0" -u sshd
2⤵
PID:1631

/bin/cat
cat "/var/log/auth*"
1⤵
PID:1632

/bin/zcat
zcat "/var/log/auth*"
1⤵
PID:1633

/bin/gzip
gzip -cd "/var/log/auth*"
1⤵
PID:1633

/usr/bin/free
free -m
1⤵
- Reads CPU attributes
- Reads runtime system information
PID:1652

/usr/bin/uptime
uptime
1⤵
- Reads CPU attributes
- Reads runtime system information
PID:1653

/usr/bin/free
free -m
1⤵
- Reads CPU attributes
- Reads runtime system information
PID:1654

/usr/bin/uptime
uptime
1⤵
- Reads CPU attributes
PID:1655

/usr/bin/free
free -m
1⤵
- Reads CPU attributes
PID:1658

/usr/bin/uptime
uptime
1⤵
- Reads CPU attributes
PID:1659

/usr/bin/free
free -m
1⤵
- Reads CPU attributes
PID:1660

/usr/bin/uptime
uptime
1⤵
- Reads CPU attributes
- Reads runtime system information
PID:1661

/usr/bin/free
free -m
1⤵
- Reads CPU attributes
PID:1662

/usr/bin/uptime
uptime
1⤵
- Reads CPU attributes
- Reads runtime system information
PID:1663

/usr/bin/free
free -m
1⤵
- Reads CPU attributes
PID:1664

/usr/bin/uptime
uptime
1⤵
- Reads CPU attributes
- Reads runtime system information
PID:1665

/usr/bin/free
free -m
1⤵
- Reads CPU attributes
- Reads runtime system information
PID:1666

/usr/bin/uptime
uptime
1⤵
- Reads CPU attributes
PID:1667

/usr/bin/free
free -m
1⤵
- Reads CPU attributes
PID:1668

/usr/bin/uptime
uptime
1⤵
- Reads CPU attributes
PID:1669

/usr/bin/free
free -m
1⤵
- Reads CPU attributes
PID:1670

/usr/bin/uptime
uptime
1⤵
- Reads CPU attributes
- Reads runtime system information
PID:1671

/usr/bin/free
free -m
1⤵
- Reads CPU attributes
PID:1672

/usr/bin/uptime
uptime
1⤵
- Reads CPU attributes
PID:1673

/usr/bin/free
free -m
1⤵
- Reads CPU attributes
- Reads runtime system information
PID:1674

/usr/bin/uptime
uptime
1⤵
- Reads CPU attributes
- Reads runtime system information
PID:1675

/usr/bin/free
free -m
1⤵
- Reads CPU attributes
PID:1676

/usr/bin/uptime
uptime
1⤵
- Reads CPU attributes
- Reads runtime system information
PID:1677

/usr/bin/free
free -m
1⤵
- Reads CPU attributes
PID:1678

/usr/bin/uptime
uptime
1⤵
- Reads CPU attributes
PID:1679

/usr/bin/free
free -m
1⤵
- Reads CPU attributes
PID:1680

/usr/bin/uptime
uptime
1⤵
- Reads CPU attributes
- Reads runtime system information
PID:1681

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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