Malware Analysis Report

2024-11-13 20:02

Sample ID 240909-1l9sds1hqk
Target 562597b775c99aaf02c9e8f5adfdcc62b2cb249b4fbb06e4e128a0bd5daa3899
SHA256 562597b775c99aaf02c9e8f5adfdcc62b2cb249b4fbb06e4e128a0bd5daa3899
Tags
floxif backdoor discovery trojan upx
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

562597b775c99aaf02c9e8f5adfdcc62b2cb249b4fbb06e4e128a0bd5daa3899

Threat Level: Known bad

The file 562597b775c99aaf02c9e8f5adfdcc62b2cb249b4fbb06e4e128a0bd5daa3899 was found to be: Known bad.

Malicious Activity Summary

floxif backdoor discovery trojan upx

Floxif, Floodfix

Detects Floxif payload

Loads dropped DLL

ACProtect 1.3x - 1.4x DLL software

UPX packed file

Drops file in Program Files directory

System Location Discovery: System Language Discovery

Unsigned PE

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-09-09 21:45

Signatures

Unsigned PE

Description Indicator Process Target
N/A N/A N/A N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-09-09 21:45

Reported

2024-09-09 21:48

Platform

win7-20240903-en

Max time kernel

122s

Max time network

122s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\562597b775c99aaf02c9e8f5adfdcc62b2cb249b4fbb06e4e128a0bd5daa3899.dll,#1

Signatures

Floxif, Floodfix

backdoor trojan floxif

Detects Floxif payload

backdoor
Description Indicator Process Target
N/A N/A N/A N/A

ACProtect 1.3x - 1.4x DLL software

Description Indicator Process Target
N/A N/A N/A N/A

Loads dropped DLL

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\rundll32.exe N/A

UPX packed file

upx
Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A

Drops file in Program Files directory

Description Indicator Process Target
File created C:\Program Files\Common Files\System\symsrv.dll C:\Windows\SysWOW64\rundll32.exe N/A

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\rundll32.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2688 wrote to memory of 2156 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2688 wrote to memory of 2156 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2688 wrote to memory of 2156 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2688 wrote to memory of 2156 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2688 wrote to memory of 2156 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2688 wrote to memory of 2156 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2688 wrote to memory of 2156 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\562597b775c99aaf02c9e8f5adfdcc62b2cb249b4fbb06e4e128a0bd5daa3899.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\562597b775c99aaf02c9e8f5adfdcc62b2cb249b4fbb06e4e128a0bd5daa3899.dll,#1

Network

N/A

Files

\Program Files\Common Files\System\symsrv.dll

MD5 4fcd7574537cebec8e75b4e646996643
SHA1 efa59bb9050fb656b90d5d40c942fb2a304f2a8b
SHA256 8ea3b17e4b783ffc0bc387b81b823bf87af0d57da74541d88ba85314bb232a5d
SHA512 7f1a7ef64d332a735db82506b47d84853af870785066d29ccaf4fdeab114079a9f0db400e01ba574776a0d652a248658fe1e8f9659cdced19ad6eea09644ea3e

memory/2156-3-0x0000000010000000-0x0000000010033000-memory.dmp

memory/2156-4-0x0000000074BD0000-0x0000000074CCD000-memory.dmp

memory/2156-6-0x0000000010000000-0x0000000010033000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-09-09 21:45

Reported

2024-09-09 21:48

Platform

win10v2004-20240802-en

Max time kernel

93s

Max time network

123s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\562597b775c99aaf02c9e8f5adfdcc62b2cb249b4fbb06e4e128a0bd5daa3899.dll,#1

Signatures

Floxif, Floodfix

backdoor trojan floxif

Detects Floxif payload

backdoor
Description Indicator Process Target
N/A N/A N/A N/A

ACProtect 1.3x - 1.4x DLL software

Description Indicator Process Target
N/A N/A N/A N/A

Loads dropped DLL

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\rundll32.exe N/A

UPX packed file

upx
Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A

Drops file in Program Files directory

Description Indicator Process Target
File created C:\Program Files\Common Files\System\symsrv.dll C:\Windows\SysWOW64\rundll32.exe N/A

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\rundll32.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 4204 wrote to memory of 1512 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 4204 wrote to memory of 1512 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 4204 wrote to memory of 1512 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\562597b775c99aaf02c9e8f5adfdcc62b2cb249b4fbb06e4e128a0bd5daa3899.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\562597b775c99aaf02c9e8f5adfdcc62b2cb249b4fbb06e4e128a0bd5daa3899.dll,#1

Network

Country Destination Domain Proto
US 8.8.8.8:53 88.210.23.2.in-addr.arpa udp
US 8.8.8.8:53 149.220.183.52.in-addr.arpa udp
US 8.8.8.8:53 22.160.190.20.in-addr.arpa udp
US 8.8.8.8:53 133.211.185.52.in-addr.arpa udp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 8.8.8.8:53 69.190.18.2.in-addr.arpa udp
US 8.8.8.8:53 45.56.20.217.in-addr.arpa udp
US 8.8.8.8:53 44.56.20.217.in-addr.arpa udp

Files

C:\Program Files\Common Files\System\symsrv.dll

MD5 4fcd7574537cebec8e75b4e646996643
SHA1 efa59bb9050fb656b90d5d40c942fb2a304f2a8b
SHA256 8ea3b17e4b783ffc0bc387b81b823bf87af0d57da74541d88ba85314bb232a5d
SHA512 7f1a7ef64d332a735db82506b47d84853af870785066d29ccaf4fdeab114079a9f0db400e01ba574776a0d652a248658fe1e8f9659cdced19ad6eea09644ea3e

memory/1512-2-0x0000000010000000-0x0000000010033000-memory.dmp

memory/1512-5-0x000000007495B000-0x000000007495C000-memory.dmp

memory/1512-8-0x0000000010000000-0x0000000010033000-memory.dmp

memory/1512-6-0x0000000074950000-0x0000000074A4D000-memory.dmp