f98738570d8c66e4c87bdec0d6d9ccb5f7de0421cc734e1af55664e6bf446f46

Analysis

max time kernel
213s
max time network
236s
platform
ubuntu-18.04_amd64
resource
ubuntu1804-amd64-20231026-en
resource tags

arch:amd64arch:i386image:ubuntu1804-amd64-20231026-enkernel:4.15.0-213-genericlocale:en-usos:ubuntu-18.04-amd64system
submitted
11-11-2023 13:40

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General

Target

The-MALWARE-Repo-master/Botnets/FritzFrog/d1e82d4a37959a9e6b661e31b8c8c6d2813c93ac92508a2771b2491b04ea2485
Size

8.7MB
MD5

aa55272ad8db954381a8eab889f087cf
SHA1

d7df26bf57530c0475247b0f3335e5d19d9cb30d
SHA256

d1e82d4a37959a9e6b661e31b8c8c6d2813c93ac92508a2771b2491b04ea2485
SHA512

5590c039eb50708fe8fe417a5b5adf1d9019db0590dee119d0907bb588114bcbeb980c5ec7f3f77e85aefcbba76c1560e8b81069434ef5774ca60b1e28dbac20
SSDEEP

98304:WjLz0rgRnuINVhcBSTDQaQqfViO7tauT8Xu4RM7Xk:WjLz0rgRXVzP5QkViitauT8Y

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:

d1e82d4a37959a9e6b661e31b8c8c6d2813c93ac92508a2771b2491b04ea2485

description	ioc
File opened for modification	/root/.ssh/authorized_keys
File opened for modification	/root/.ssh/authorized_keys	d1e82d4a37959a9e6b661e31b8c8c6d2813c93ac92508a2771b2491b04ea2485

Deletes itself 1 IoCs

Processes:

pid

1543
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
1543

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:

d1e82d4a37959a9e6b661e31b8c8c6d2813c93ac92508a2771b2491b04ea2485

description	ioc
File deleted	/var/log/tmp/The-MALWARE-Repo-master/Botnets/FritzFrog/d1e82d4a37959a9e6b661e31b8c8c6d2813c93ac92508a2771b2491b04ea2485
File deleted	/var/log/tmp/The-MALWARE-Repo-master/Botnets/FritzFrog/d1e82d4a37959a9e6b661e31b8c8c6d2813c93ac92508a2771b2491b04ea2485	d1e82d4a37959a9e6b661e31b8c8c6d2813c93ac92508a2771b2491b04ea2485

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

Reads CPU attributes 1 TTPs 30 IoCs

System Information Discovery

T1082

Processes:

freefreeuptimeuptimeuptimefreefreeuptimefreeuptimefreefreefreeuptimefreefreeuptimefreeuptimefreeuptimeuptimeuptimeuptimeuptimefreeuptimefreeuptimefree

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	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	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	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	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
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

Reads runtime system information 64 IoCs

Reads data from /proc virtual filesystem.

Processes:

d1e82d4a37959a9e6b661e31b8c8c6d2813c93ac92508a2771b2491b04ea2485uptimeuptimeuptimeuptimeuptimefree

description	ioc	process
File opened for reading	/proc/6/stat	d1e82d4a37959a9e6b661e31b8c8c6d2813c93ac92508a2771b2491b04ea2485
File opened for reading	/proc/7/cmdline	d1e82d4a37959a9e6b661e31b8c8c6d2813c93ac92508a2771b2491b04ea2485
File opened for reading	/proc/uptime	uptime
File opened for reading	/proc/970/cmdline
File opened for reading	/proc/1186/stat
File opened for reading	/proc/548/stat	d1e82d4a37959a9e6b661e31b8c8c6d2813c93ac92508a2771b2491b04ea2485
File opened for reading	/proc/169/cmdline	d1e82d4a37959a9e6b661e31b8c8c6d2813c93ac92508a2771b2491b04ea2485
File opened for reading	/proc/178/cmdline	d1e82d4a37959a9e6b661e31b8c8c6d2813c93ac92508a2771b2491b04ea2485
File opened for reading	/proc/965/cmdline
File opened for reading	/proc/1165/stat	d1e82d4a37959a9e6b661e31b8c8c6d2813c93ac92508a2771b2491b04ea2485
File opened for reading	/proc/84/stat	d1e82d4a37959a9e6b661e31b8c8c6d2813c93ac92508a2771b2491b04ea2485
File opened for reading	/proc/1093/cmdline	d1e82d4a37959a9e6b661e31b8c8c6d2813c93ac92508a2771b2491b04ea2485
File opened for reading	/proc/129/cmdline	d1e82d4a37959a9e6b661e31b8c8c6d2813c93ac92508a2771b2491b04ea2485
File opened for reading	/proc/175/stat
File opened for reading	/proc/1135/stat	d1e82d4a37959a9e6b661e31b8c8c6d2813c93ac92508a2771b2491b04ea2485
File opened for reading	/proc/1317/stat
File opened for reading	/proc/173/stat	d1e82d4a37959a9e6b661e31b8c8c6d2813c93ac92508a2771b2491b04ea2485
File opened for reading	/proc/680/cmdline
File opened for reading	/proc/115/stat
File opened for reading	/proc/1157/stat
File opened for reading	/proc/319/stat
File opened for reading	/proc/1072/cmdline	d1e82d4a37959a9e6b661e31b8c8c6d2813c93ac92508a2771b2491b04ea2485
File opened for reading	/proc/1152/cmdline	d1e82d4a37959a9e6b661e31b8c8c6d2813c93ac92508a2771b2491b04ea2485
File opened for reading	/proc/84/cmdline	d1e82d4a37959a9e6b661e31b8c8c6d2813c93ac92508a2771b2491b04ea2485
File opened for reading	/proc/1337/cmdline
File opened for reading	/proc/166/cmdline
File opened for reading	/proc/179/cmdline
File opened for reading	/proc/82/cmdline
File opened for reading	/proc/1131/cmdline
File opened for reading	/proc/16/cmdline
File opened for reading	/proc/969/cmdline
File opened for reading	/proc/1259/stat
File opened for reading	/proc/1093/stat	d1e82d4a37959a9e6b661e31b8c8c6d2813c93ac92508a2771b2491b04ea2485
File opened for reading	/proc/sys/kernel/osrelease	uptime
File opened for reading	/proc/sys/kernel/osrelease	uptime
File opened for reading	/proc/loadavg	uptime
File opened for reading	/proc/1268/cmdline
File opened for reading	/proc/1278/cmdline
File opened for reading	/proc/1550/stat
File opened for reading	/proc/1278/cmdline	d1e82d4a37959a9e6b661e31b8c8c6d2813c93ac92508a2771b2491b04ea2485
File opened for reading	/proc/1199/cmdline
File opened for reading	/proc/1312/stat
File opened for reading	/proc/490/cmdline
File opened for reading	/proc/1514/stat
File opened for reading	/proc/437/stat
File opened for reading	/proc/438/stat
File opened for reading	/proc/660/stat
File opened for reading	/proc/960/stat
File opened for reading	/proc/1143/cmdline
File opened for reading	/proc/1156/cmdline
File opened for reading	/proc/166/cmdline	d1e82d4a37959a9e6b661e31b8c8c6d2813c93ac92508a2771b2491b04ea2485
File opened for reading	/proc/sys/kernel/osrelease	uptime
File opened for reading	/proc/1221/stat	d1e82d4a37959a9e6b661e31b8c8c6d2813c93ac92508a2771b2491b04ea2485
File opened for reading	/proc/1177/cmdline	d1e82d4a37959a9e6b661e31b8c8c6d2813c93ac92508a2771b2491b04ea2485
File opened for reading	/proc/1046/stat
File opened for reading	/proc/1070/stat
File opened for reading	/proc/1143/stat
File opened for reading	/proc/meminfo	free
File opened for reading	/proc/15/stat	d1e82d4a37959a9e6b661e31b8c8c6d2813c93ac92508a2771b2491b04ea2485
File opened for reading	/proc/167/stat	d1e82d4a37959a9e6b661e31b8c8c6d2813c93ac92508a2771b2491b04ea2485
File opened for reading	/proc/1046/cmdline
File opened for reading	/proc/98/cmdline
File opened for reading	/proc/279/cmdline	d1e82d4a37959a9e6b661e31b8c8c6d2813c93ac92508a2771b2491b04ea2485
File opened for reading	/proc/1102/cmdline	d1e82d4a37959a9e6b661e31b8c8c6d2813c93ac92508a2771b2491b04ea2485

/tmp/The-MALWARE-Repo-master/Botnets/FritzFrog/d1e82d4a37959a9e6b661e31b8c8c6d2813c93ac92508a2771b2491b04ea2485
/tmp/The-MALWARE-Repo-master/Botnets/FritzFrog/d1e82d4a37959a9e6b661e31b8c8c6d2813c93ac92508a2771b2491b04ea2485
1⤵
- Adds new SSH keys
- Deletes log files
- Reads runtime system information
PID:1538

/usr/bin/free
free -m
2⤵
- Reads CPU attributes
PID:1561

/usr/bin/uptime
uptime
2⤵
- Reads CPU attributes
PID:1562

/usr/bin/free
free -m
2⤵
- Reads CPU attributes
- Reads runtime system information
PID:1565

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

/usr/bin/free
free -m
2⤵
- Reads CPU attributes
PID:1583

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

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

/usr/bin/uptime
uptime
2⤵
- Reads CPU attributes
PID:1590

/usr/bin/free
free -m
2⤵
- Reads CPU attributes
PID:1595

/usr/bin/uptime
uptime
2⤵
- Reads CPU attributes
PID:1596

/usr/bin/free
free -m
2⤵
- Reads CPU attributes
PID:1599

/usr/bin/uptime
uptime
2⤵
- Reads CPU attributes
- Reads runtime system information
PID:1600

/usr/bin/free
free -m
2⤵
- Reads CPU attributes
PID:1603

/usr/bin/uptime
uptime
2⤵
- Reads CPU attributes
PID:1604

/bin/uname
uname -a
1⤵
PID:1549

/bin/cat
cat /proc/cpuinfo
1⤵
- Checks CPU configuration
PID:1553

/bin/cat
cat /etc/issue
1⤵
PID:1554

/usr/bin/free
free -m
1⤵
- Reads CPU attributes
PID:1555

/usr/bin/uptime
uptime
1⤵
- Reads CPU attributes
PID:1556

/bin/journalctl
journalctl -S "@0" -u sshd
1⤵
PID:1557

/bin/cat
cat "/var/log/auth*"
1⤵
PID:1559

/bin/zcat
zcat "/var/log/auth*"
1⤵
PID:1560

/bin/gzip
gzip -cd "/var/log/auth*"
1⤵
PID:1560

/usr/bin/free
free -m
1⤵
- Reads CPU attributes
PID:1563

/usr/bin/uptime
uptime
1⤵
- Reads CPU attributes
PID:1564

/usr/bin/free
free -m
1⤵
- Reads CPU attributes
PID:1581

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

/usr/bin/free
free -m
1⤵
- Reads CPU attributes
PID:1585

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

/usr/bin/free
free -m
1⤵
- Reads CPU attributes
PID:1587

/usr/bin/uptime
uptime
1⤵
- Reads CPU attributes
- Reads runtime system information
PID:1588

/usr/bin/free
free -m
1⤵
- Reads CPU attributes
PID:1592

/usr/bin/uptime
uptime
1⤵
- Reads CPU attributes
- Reads runtime system information
PID:1593

/usr/bin/free
free -m
1⤵
- Reads CPU attributes
PID:1597

/usr/bin/uptime
uptime
1⤵
- Reads CPU attributes
- Reads runtime system information
PID:1598

/usr/bin/free
free -m
1⤵
- Reads CPU attributes
PID:1601

/usr/bin/uptime
uptime
1⤵
- Reads CPU attributes
- Reads runtime system information
PID:1602

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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