Malware Analysis Report

2025-01-02 07:20

Sample ID 240914-xmmsgazgma
Target 51a533f61f989589110a7556570979e0N
SHA256 4da55823fe1586a107c1f322a0ba71a41bed1574c9b6c3bf4c35abc74d5440f2
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

4da55823fe1586a107c1f322a0ba71a41bed1574c9b6c3bf4c35abc74d5440f2

Threat Level: Known bad

The file 51a533f61f989589110a7556570979e0N was found to be: Known bad.

Malicious Activity Summary

floxif backdoor discovery trojan upx

Floxif, Floodfix

Detects Floxif payload

ACProtect 1.3x - 1.4x DLL software

UPX packed file

Loads dropped DLL

Enumerates connected drives

Drops file in Program Files directory

Unsigned PE

System Location Discovery: System Language Discovery

Modifies registry class

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Suspicious use of SetWindowsHookEx

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-09-14 18:58

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-09-14 18:58

Reported

2024-09-14 19:00

Platform

win7-20240903-en

Max time kernel

119s

Max time network

119s

Command Line

"C:\Users\Admin\AppData\Local\Temp\51a533f61f989589110a7556570979e0N.exe"

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:\Users\Admin\AppData\Local\Temp\51a533f61f989589110a7556570979e0N.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
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A

Enumerates connected drives

Description Indicator Process Target
File opened (read-only) \??\e: C:\Users\Admin\AppData\Local\Temp\51a533f61f989589110a7556570979e0N.exe N/A

Drops file in Program Files directory

Description Indicator Process Target
File created \??\c:\program files\common files\system\symsrv.dll.000 C:\Users\Admin\AppData\Local\Temp\51a533f61f989589110a7556570979e0N.exe N/A
File created C:\Program Files\Common Files\System\symsrv.dll C:\Users\Admin\AppData\Local\Temp\51a533f61f989589110a7556570979e0N.exe N/A

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\51a533f61f989589110a7556570979e0N.exe N/A

Modifies registry class

Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\SoundRec\protocol\StdFileEditing\server\ = "sndrec32.exe" C:\Users\Admin\AppData\Local\Temp\51a533f61f989589110a7556570979e0N.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\SoundRec\protocol\StdExecute\server C:\Users\Admin\AppData\Local\Temp\51a533f61f989589110a7556570979e0N.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\SoundRec C:\Users\Admin\AppData\Local\Temp\51a533f61f989589110a7556570979e0N.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\SoundRec\protocol C:\Users\Admin\AppData\Local\Temp\51a533f61f989589110a7556570979e0N.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\SoundRec\protocol\StdExecute C:\Users\Admin\AppData\Local\Temp\51a533f61f989589110a7556570979e0N.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\SoundRec\protocol\StdExecute\server\ = "sndrec32.exe" C:\Users\Admin\AppData\Local\Temp\51a533f61f989589110a7556570979e0N.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\SoundRec\protocol\StdFileEditing\server C:\Users\Admin\AppData\Local\Temp\51a533f61f989589110a7556570979e0N.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\SoundRec\protocol\StdFileEditing C:\Users\Admin\AppData\Local\Temp\51a533f61f989589110a7556570979e0N.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\51a533f61f989589110a7556570979e0N.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\51a533f61f989589110a7556570979e0N.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\51a533f61f989589110a7556570979e0N.exe

"C:\Users\Admin\AppData\Local\Temp\51a533f61f989589110a7556570979e0N.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 5isohu.com udp
US 8.8.8.8:53 www.aieov.com udp
US 198.58.118.167:80 www.aieov.com tcp
US 198.58.118.167:80 www.aieov.com tcp
US 198.58.118.167:80 www.aieov.com tcp
US 198.58.118.167:80 www.aieov.com tcp
US 198.58.118.167:80 www.aieov.com tcp
US 198.58.118.167:80 www.aieov.com tcp

Files

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

MD5 7574cf2c64f35161ab1292e2f532aabf
SHA1 14ba3fa927a06224dfe587014299e834def4644f
SHA256 de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085
SHA512 4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab

memory/2168-3-0x0000000010000000-0x0000000010030000-memory.dmp

memory/2168-5-0x0000000001008000-0x000000000100B000-memory.dmp

memory/2168-11-0x0000000010000000-0x0000000010030000-memory.dmp

memory/2168-12-0x0000000010000000-0x0000000010030000-memory.dmp

memory/2168-13-0x0000000001000000-0x0000000001023000-memory.dmp

memory/2168-16-0x0000000010000000-0x0000000010030000-memory.dmp

memory/2168-19-0x0000000010000000-0x0000000010030000-memory.dmp

memory/2168-22-0x0000000010000000-0x0000000010030000-memory.dmp

C:\Program Files\Common Files\System\symsrv.dll.000

MD5 1130c911bf5db4b8f7cf9b6f4b457623
SHA1 48e734c4bc1a8b5399bff4954e54b268bde9d54c
SHA256 eba08cc8182f379392a97f542b350ea0dbbe5e4009472f35af20e3d857eafdf1
SHA512 94e2511ef2c53494c2aff0960266491ffc0e54e75185427d1ccedae27c286992c754ca94cbb0c9ea36e3f04cd4eb7f032c551cf2d4b309f292906303f1a75fa0

memory/2168-25-0x0000000010000000-0x0000000010030000-memory.dmp

memory/2168-28-0x0000000010000000-0x0000000010030000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-09-14 18:58

Reported

2024-09-14 19:00

Platform

win10v2004-20240802-en

Max time kernel

116s

Max time network

100s

Command Line

"C:\Users\Admin\AppData\Local\Temp\51a533f61f989589110a7556570979e0N.exe"

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:\Users\Admin\AppData\Local\Temp\51a533f61f989589110a7556570979e0N.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
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A

Enumerates connected drives

Description Indicator Process Target
File opened (read-only) \??\e: C:\Users\Admin\AppData\Local\Temp\51a533f61f989589110a7556570979e0N.exe N/A

Drops file in Program Files directory

Description Indicator Process Target
File created C:\Program Files\Common Files\System\symsrv.dll C:\Users\Admin\AppData\Local\Temp\51a533f61f989589110a7556570979e0N.exe N/A
File created \??\c:\program files\common files\system\symsrv.dll.000 C:\Users\Admin\AppData\Local\Temp\51a533f61f989589110a7556570979e0N.exe N/A

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\51a533f61f989589110a7556570979e0N.exe N/A

Modifies registry class

Description Indicator Process Target
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\SoundRec\protocol C:\Users\Admin\AppData\Local\Temp\51a533f61f989589110a7556570979e0N.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\SoundRec\protocol\StdExecute C:\Users\Admin\AppData\Local\Temp\51a533f61f989589110a7556570979e0N.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\SoundRec\protocol\StdExecute\server\ = "sndrec32.exe" C:\Users\Admin\AppData\Local\Temp\51a533f61f989589110a7556570979e0N.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\SoundRec\protocol\StdFileEditing\server C:\Users\Admin\AppData\Local\Temp\51a533f61f989589110a7556570979e0N.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\SoundRec\protocol\StdFileEditing C:\Users\Admin\AppData\Local\Temp\51a533f61f989589110a7556570979e0N.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\SoundRec\protocol\StdFileEditing\server\ = "sndrec32.exe" C:\Users\Admin\AppData\Local\Temp\51a533f61f989589110a7556570979e0N.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\SoundRec\protocol\StdExecute\server C:\Users\Admin\AppData\Local\Temp\51a533f61f989589110a7556570979e0N.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\SoundRec C:\Users\Admin\AppData\Local\Temp\51a533f61f989589110a7556570979e0N.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\51a533f61f989589110a7556570979e0N.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\51a533f61f989589110a7556570979e0N.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\51a533f61f989589110a7556570979e0N.exe

"C:\Users\Admin\AppData\Local\Temp\51a533f61f989589110a7556570979e0N.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 217.106.137.52.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 5isohu.com udp
US 8.8.8.8:53 www.aieov.com udp
US 45.33.20.235:80 www.aieov.com tcp
US 8.8.8.8:53 235.20.33.45.in-addr.arpa udp
US 8.8.8.8:53 71.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 5isohu.com udp
US 45.33.20.235:80 www.aieov.com tcp
US 8.8.8.8:53 5isohu.com udp
US 45.33.20.235:80 www.aieov.com tcp
US 8.8.8.8:53 232.168.11.51.in-addr.arpa udp
US 8.8.8.8:53 5isohu.com udp
US 45.33.20.235:80 www.aieov.com tcp
US 8.8.8.8:53 5isohu.com udp
US 45.33.20.235:80 www.aieov.com tcp
US 45.33.20.235:80 www.aieov.com tcp
US 8.8.8.8:53 5isohu.com udp
US 8.8.8.8:53 103.169.127.40.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
US 8.8.8.8:53 18.134.221.88.in-addr.arpa udp
US 8.8.8.8:53 25.140.123.92.in-addr.arpa udp
US 8.8.8.8:53 43.229.111.52.in-addr.arpa udp

Files

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

MD5 7574cf2c64f35161ab1292e2f532aabf
SHA1 14ba3fa927a06224dfe587014299e834def4644f
SHA256 de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085
SHA512 4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab

memory/972-4-0x0000000010000000-0x0000000010030000-memory.dmp

memory/972-6-0x0000000001008000-0x000000000100B000-memory.dmp

memory/972-12-0x0000000001000000-0x0000000001023000-memory.dmp

memory/972-15-0x0000000010000000-0x0000000010030000-memory.dmp

memory/972-16-0x0000000010000000-0x0000000010030000-memory.dmp

memory/972-21-0x0000000010000000-0x0000000010030000-memory.dmp

C:\Program Files\Common Files\System\symsrv.dll.000

MD5 1130c911bf5db4b8f7cf9b6f4b457623
SHA1 48e734c4bc1a8b5399bff4954e54b268bde9d54c
SHA256 eba08cc8182f379392a97f542b350ea0dbbe5e4009472f35af20e3d857eafdf1
SHA512 94e2511ef2c53494c2aff0960266491ffc0e54e75185427d1ccedae27c286992c754ca94cbb0c9ea36e3f04cd4eb7f032c551cf2d4b309f292906303f1a75fa0

memory/972-26-0x0000000010000000-0x0000000010030000-memory.dmp

memory/972-32-0x0000000010000000-0x0000000010030000-memory.dmp