b7dd3bce3ebfbc2d5e3a9f00d47f27cb6a5895c4618c878e314e573a7c216df1

Analysis

max time kernel
159s
max time network
148s
platform
ubuntu-20.04_amd64
resource
ubuntu2004-amd64-20240221-en
resource tags

arch:amd64arch:i386image:ubuntu2004-amd64-20240221-enkernel:5.4.0-169-genericlocale:en-usos:ubuntu-20.04-amd64system
submitted
01-03-2024 21:28

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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 infostealer 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

1485
Reads EFI boot settings 1 IoCs
Reads EFI boot settings from the efivars filesystem, may contain security secrets or sensitive data.
infostealer

Processes:

journalctl

description ioc process

File opened for reading /sys/firmware/efi/efivars/SystemdOptions-8cf2644b-4b0b-428f-9387-6d876050dc67 journalctl
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
1485

description	ioc	process
File opened for reading	/sys/firmware/efi/efivars/SystemdOptions-8cf2644b-4b0b-428f-9387-6d876050dc67	journalctl

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 24 IoCs

System Information Discovery

T1082

Processes:

freefreefreeuptimefreefreeuptimeuptimeuptimefreefreeuptimeuptimeuptimefreeuptimefreeuptimefreeuptimefreeuptimefreeuptime

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	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	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	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

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

System Information Discovery
T1082

Processes:

journalctl

description ioc process

File opened for reading /sys/firmware/efi/efivars/SystemdOptions-8cf2644b-4b0b-428f-9387-6d876050dc67 journalctl

description	ioc	process
File opened for reading	/sys/firmware/efi/efivars/SystemdOptions-8cf2644b-4b0b-428f-9387-6d876050dc67	journalctl

Reads runtime system information 64 IoCs

Reads data from /proc virtual filesystem.

Processes:

d1e82d4a37959a9e6b661e31b8c8c6d2813c93ac92508a2771b2491b04ea2485freefreejournalctl

description	ioc	process
File opened for reading	/proc/573/stat	d1e82d4a37959a9e6b661e31b8c8c6d2813c93ac92508a2771b2491b04ea2485
File opened for reading	/proc/118/stat
File opened for reading	/proc/1464/cmdline	d1e82d4a37959a9e6b661e31b8c8c6d2813c93ac92508a2771b2491b04ea2485
File opened for reading	/proc/164/cmdline
File opened for reading	/proc/meminfo	free
File opened for reading	/proc/1528/stat	d1e82d4a37959a9e6b661e31b8c8c6d2813c93ac92508a2771b2491b04ea2485
File opened for reading	/proc/175/stat
File opened for reading	/proc/1082/cmdline
File opened for reading	/proc/1463/stat
File opened for reading	/proc/909/stat	d1e82d4a37959a9e6b661e31b8c8c6d2813c93ac92508a2771b2491b04ea2485
File opened for reading	/proc/974/stat	d1e82d4a37959a9e6b661e31b8c8c6d2813c93ac92508a2771b2491b04ea2485
File opened for reading	/proc/88/stat
File opened for reading	/proc/16/cmdline	d1e82d4a37959a9e6b661e31b8c8c6d2813c93ac92508a2771b2491b04ea2485
File opened for reading	/proc/200/cmdline	d1e82d4a37959a9e6b661e31b8c8c6d2813c93ac92508a2771b2491b04ea2485
File opened for reading	/proc/663/cmdline	d1e82d4a37959a9e6b661e31b8c8c6d2813c93ac92508a2771b2491b04ea2485
File opened for reading	/proc/meminfo	free
File opened for reading	/proc/496/cmdline	d1e82d4a37959a9e6b661e31b8c8c6d2813c93ac92508a2771b2491b04ea2485
File opened for reading	/proc/12/cmdline	d1e82d4a37959a9e6b661e31b8c8c6d2813c93ac92508a2771b2491b04ea2485
File opened for reading	/proc/1102/stat
File opened for reading	/proc/270/cmdline
File opened for reading	/proc/804/cmdline
File opened for reading	/proc/622/stat	d1e82d4a37959a9e6b661e31b8c8c6d2813c93ac92508a2771b2491b04ea2485
File opened for reading	/proc/1521/stat
File opened for reading	/proc/266/cmdline
File opened for reading	/proc/968/cmdline
File opened for reading	/proc/270/stat	d1e82d4a37959a9e6b661e31b8c8c6d2813c93ac92508a2771b2491b04ea2485
File opened for reading	/proc/172/stat
File opened for reading	/proc/74/cmdline
File opened for reading	/proc/396/stat	d1e82d4a37959a9e6b661e31b8c8c6d2813c93ac92508a2771b2491b04ea2485
File opened for reading	/proc/914/stat	d1e82d4a37959a9e6b661e31b8c8c6d2813c93ac92508a2771b2491b04ea2485
File opened for reading	/proc/sys/kernel/osrelease	free
File opened for reading	/proc/1427/stat	d1e82d4a37959a9e6b661e31b8c8c6d2813c93ac92508a2771b2491b04ea2485
File opened for reading	/proc/172/stat	d1e82d4a37959a9e6b661e31b8c8c6d2813c93ac92508a2771b2491b04ea2485
File opened for reading	/proc/992/cmdline
File opened for reading	/proc/1034/cmdline	d1e82d4a37959a9e6b661e31b8c8c6d2813c93ac92508a2771b2491b04ea2485
File opened for reading	/proc/812/stat
File opened for reading	/proc/552/cmdline
File opened for reading	/proc/1523/stat
File opened for reading	/proc/671/stat	d1e82d4a37959a9e6b661e31b8c8c6d2813c93ac92508a2771b2491b04ea2485
File opened for reading	/proc/831/stat	d1e82d4a37959a9e6b661e31b8c8c6d2813c93ac92508a2771b2491b04ea2485
File opened for reading	/proc/948/stat	d1e82d4a37959a9e6b661e31b8c8c6d2813c93ac92508a2771b2491b04ea2485
File opened for reading	/proc/806/stat	d1e82d4a37959a9e6b661e31b8c8c6d2813c93ac92508a2771b2491b04ea2485
File opened for reading	/proc/479/stat
File opened for reading	/proc/586/stat
File opened for reading	/proc/15/cmdline
File opened for reading	/proc/799/cmdline
File opened for reading	/proc/1/environ	journalctl
File opened for reading	/proc/1526/stat	d1e82d4a37959a9e6b661e31b8c8c6d2813c93ac92508a2771b2491b04ea2485
File opened for reading	/proc/490/stat	d1e82d4a37959a9e6b661e31b8c8c6d2813c93ac92508a2771b2491b04ea2485
File opened for reading	/proc/86/cmdline
File opened for reading	/proc/968/stat	d1e82d4a37959a9e6b661e31b8c8c6d2813c93ac92508a2771b2491b04ea2485
File opened for reading	/proc/1100/stat
File opened for reading	/proc/1528/stat
File opened for reading	/proc/2133/stat
File opened for reading	/proc/787/cmdline	d1e82d4a37959a9e6b661e31b8c8c6d2813c93ac92508a2771b2491b04ea2485
File opened for reading	/proc/131/stat	d1e82d4a37959a9e6b661e31b8c8c6d2813c93ac92508a2771b2491b04ea2485
File opened for reading	/proc/176/stat	d1e82d4a37959a9e6b661e31b8c8c6d2813c93ac92508a2771b2491b04ea2485
File opened for reading	/proc/1089/stat
File opened for reading	/proc/166/cmdline
File opened for reading	/proc/456/cmdline
File opened for reading	/proc/82/cmdline
File opened for reading	/proc/sys/kernel/osrelease	free
File opened for reading	/proc/1102/cmdline	d1e82d4a37959a9e6b661e31b8c8c6d2813c93ac92508a2771b2491b04ea2485
File opened for reading	/proc/118/stat	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:1481
- /usr/bin/journalctl
  journalctl -S "@0" -u sshd
  2⤵
  - Reads EFI boot settings
  - Enumerates kernel/hardware configuration
  - Reads runtime system information
  PID:1542
- /usr/bin/free
  free -m
  2⤵
  - Reads CPU attributes
  PID:1935
- /usr/bin/uptime
  uptime
  2⤵
  - Reads CPU attributes
  PID:1936
- /usr/bin/free
  free -m
  2⤵
  - Reads CPU attributes
  PID:2120
- /usr/bin/uptime
  uptime
  2⤵
  - Reads CPU attributes
  PID:2121
- /bin/bash
  /bin/bash -
  2⤵
  PID:2135
- - /usr/bin/grep
    grep -c xmr
    3⤵
    PID:2138
- - /usr/bin/strings
    strings /proc/1/exe
    3⤵
    PID:2137

/usr/bin/uname
uname -a
1⤵
PID:1537

/usr/bin/cat
cat /proc/cpuinfo
1⤵
- Checks CPU configuration
PID:1538

/usr/bin/cat
cat /etc/issue
1⤵
PID:1539

/usr/bin/free
free -m
1⤵
- Reads CPU attributes
- Reads runtime system information
PID:1540

/usr/bin/uptime
uptime
1⤵
- Reads CPU attributes
PID:1541

/usr/bin/cat
cat "/var/log/auth*"
1⤵
PID:1543

/usr/bin/zcat
zcat "/var/log/auth*"
1⤵
PID:1544

/usr/local/sbin/gzip
gzip -cd "/var/log/auth*"
1⤵
PID:1544

/usr/local/bin/gzip
gzip -cd "/var/log/auth*"
1⤵
PID:1544

/usr/sbin/gzip
gzip -cd "/var/log/auth*"
1⤵
PID:1544

/usr/bin/gzip
gzip -cd "/var/log/auth*"
1⤵
PID:1544

/usr/bin/free
free -m
1⤵
- Reads CPU attributes
PID:2003

/usr/bin/uptime
uptime
1⤵
- Reads CPU attributes
PID:2004

/usr/bin/free
free -m
1⤵
- Reads CPU attributes
PID:2010

/usr/bin/uptime
uptime
1⤵
- Reads CPU attributes
PID:2012

/usr/bin/free
free -m
1⤵
- Reads CPU attributes
- Reads runtime system information
PID:2122

/usr/bin/uptime
uptime
1⤵
- Reads CPU attributes
PID:2123

/usr/bin/free
free -m
1⤵
- Reads CPU attributes
PID:2136

/usr/bin/uptime
uptime
1⤵
- Reads CPU attributes
PID:2139

/usr/bin/free
free -m
1⤵
- Reads CPU attributes
PID:2140

/usr/bin/uptime
uptime
1⤵
- Reads CPU attributes
PID:2141

/usr/bin/free
free -m
1⤵
- Reads CPU attributes
PID:2143

/usr/bin/uptime
uptime
1⤵
- Reads CPU attributes
PID:2144

/usr/bin/free
free -m
1⤵
- Reads CPU attributes
PID:2145

/usr/bin/uptime
uptime
1⤵
- Reads CPU attributes
PID:2146

/usr/bin/free
free -m
1⤵
- Reads CPU attributes
PID:2147

/usr/bin/uptime
uptime
1⤵
- Reads CPU attributes
PID:2148

/usr/bin/free
free -m
1⤵
- Reads CPU attributes
PID:2149

/usr/bin/uptime
uptime
1⤵
- Reads CPU attributes
PID:2150

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Indicator Removal

T1070

Virtualization/Sandbox Evasion

T1497

Credential Access

Discovery

System Information Discovery

T1082

Virtualization/Sandbox Evasion

T1497

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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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