Malware Analysis Report

2025-01-02 07:25

Sample ID 240913-xh1hrssejm
Target 1f5ecf2d298572e05d297c39250d42bd0ebb4195180fb211adbf510856796f67
SHA256 1f5ecf2d298572e05d297c39250d42bd0ebb4195180fb211adbf510856796f67
Tags
floxif backdoor bootkit discovery persistence 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

1f5ecf2d298572e05d297c39250d42bd0ebb4195180fb211adbf510856796f67

Threat Level: Known bad

The file 1f5ecf2d298572e05d297c39250d42bd0ebb4195180fb211adbf510856796f67 was found to be: Known bad.

Malicious Activity Summary

floxif backdoor bootkit discovery persistence trojan upx

Floxif, Floodfix

Detects Floxif payload

UPX packed file

ACProtect 1.3x - 1.4x DLL software

Loads dropped DLL

Enumerates connected drives

Writes to the Master Boot Record (MBR)

Drops file in Program Files directory

System Location Discovery: System Language Discovery

Suspicious use of SetWindowsHookEx

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-09-13 18:52

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-09-13 18:51

Reported

2024-09-13 18:54

Platform

win7-20240903-en

Max time kernel

118s

Max time network

122s

Command Line

"C:\Users\Admin\AppData\Local\Temp\1f5ecf2d298572e05d297c39250d42bd0ebb4195180fb211adbf510856796f67.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

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

Writes to the Master Boot Record (MBR)

bootkit persistence
Description Indicator Process Target
File opened for modification \??\PhysicalDrive0 C:\Users\Admin\AppData\Local\Temp\1f5ecf2d298572e05d297c39250d42bd0ebb4195180fb211adbf510856796f67.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\1f5ecf2d298572e05d297c39250d42bd0ebb4195180fb211adbf510856796f67.exe N/A
File created \??\c:\program files\common files\system\symsrv.dll.000 C:\Users\Admin\AppData\Local\Temp\1f5ecf2d298572e05d297c39250d42bd0ebb4195180fb211adbf510856796f67.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\1f5ecf2d298572e05d297c39250d42bd0ebb4195180fb211adbf510856796f67.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\1f5ecf2d298572e05d297c39250d42bd0ebb4195180fb211adbf510856796f67.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\1f5ecf2d298572e05d297c39250d42bd0ebb4195180fb211adbf510856796f67.exe

"C:\Users\Admin\AppData\Local\Temp\1f5ecf2d298572e05d297c39250d42bd0ebb4195180fb211adbf510856796f67.exe"

Network

Country Destination Domain Proto
N/A 127.0.0.1:6800 tcp
US 8.8.8.8:53 5isohu.com udp
N/A 127.0.0.1:6800 tcp
US 8.8.8.8:53 oth.eve.mdt.qq.com udp
US 8.8.8.8:53 www.aieov.com udp
US 8.8.8.8:53 unifiedaccess.gameloop.com udp
US 45.79.19.196:80 www.aieov.com tcp
SG 101.33.47.206:8081 oth.eve.mdt.qq.com tcp
DE 49.51.131.79:443 unifiedaccess.gameloop.com tcp
US 8.8.8.8:53 ocsp.digicert.cn udp
GB 79.133.176.166:80 ocsp.digicert.cn tcp
SG 101.33.47.206:8081 oth.eve.mdt.qq.com tcp
SG 101.33.47.206:8081 oth.eve.mdt.qq.com tcp
SG 101.33.47.206:8081 oth.eve.mdt.qq.com tcp
US 45.79.19.196:80 www.aieov.com tcp

Files

memory/1852-3-0x0000000010000000-0x0000000010030000-memory.dmp

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

MD5 7574cf2c64f35161ab1292e2f532aabf
SHA1 14ba3fa927a06224dfe587014299e834def4644f
SHA256 de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085
SHA512 4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab

memory/1852-5-0x0000000000401000-0x0000000000402000-memory.dmp

memory/1852-6-0x0000000000400000-0x00000000008A5000-memory.dmp

memory/1852-9-0x0000000000400000-0x00000000008A5000-memory.dmp

\Users\Admin\AppData\Local\Temp\dr.dll

MD5 e58c7d21a08f8038f2d69cbbae4e7484
SHA1 3be5356e6a32a52d929b3bd2bc13f234ae82801d
SHA256 7083bba256b59c5e9ba62f700b858e0968169653cec8284e5e0c6e0098e9e191
SHA512 e1429957e7a7c9fd8299d9ba451006351457e4e6b9485ee5ed74d427c8b2807270c101ec1eb57e1f20b62541655c8a615dc07056b62ba944cbc19c314e85d65f

memory/1852-21-0x0000000010000000-0x0000000010030000-memory.dmp

memory/1852-22-0x0000000000400000-0x00000000008A5000-memory.dmp

memory/1852-23-0x0000000000400000-0x00000000008A5000-memory.dmp

memory/1852-24-0x0000000010000000-0x0000000010030000-memory.dmp

memory/1852-25-0x0000000000400000-0x00000000008A5000-memory.dmp

memory/1852-31-0x0000000010000000-0x0000000010030000-memory.dmp

memory/1852-29-0x0000000000400000-0x00000000008A5000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-09-13 18:51

Reported

2024-09-13 18:54

Platform

win10v2004-20240802-en

Max time kernel

149s

Max time network

153s

Command Line

"C:\Users\Admin\AppData\Local\Temp\1f5ecf2d298572e05d297c39250d42bd0ebb4195180fb211adbf510856796f67.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

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

Writes to the Master Boot Record (MBR)

bootkit persistence
Description Indicator Process Target
File opened for modification \??\PhysicalDrive0 C:\Users\Admin\AppData\Local\Temp\1f5ecf2d298572e05d297c39250d42bd0ebb4195180fb211adbf510856796f67.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\1f5ecf2d298572e05d297c39250d42bd0ebb4195180fb211adbf510856796f67.exe N/A
File created \??\c:\program files\common files\system\symsrv.dll.000 C:\Users\Admin\AppData\Local\Temp\1f5ecf2d298572e05d297c39250d42bd0ebb4195180fb211adbf510856796f67.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\1f5ecf2d298572e05d297c39250d42bd0ebb4195180fb211adbf510856796f67.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\1f5ecf2d298572e05d297c39250d42bd0ebb4195180fb211adbf510856796f67.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\1f5ecf2d298572e05d297c39250d42bd0ebb4195180fb211adbf510856796f67.exe

"C:\Users\Admin\AppData\Local\Temp\1f5ecf2d298572e05d297c39250d42bd0ebb4195180fb211adbf510856796f67.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 133.211.185.52.in-addr.arpa udp
N/A 127.0.0.1:6800 tcp
US 8.8.8.8:53 25.140.123.92.in-addr.arpa udp
US 8.8.8.8:53 5isohu.com udp
US 8.8.8.8:53 www.aieov.com udp
US 45.56.79.23:80 www.aieov.com tcp
US 8.8.8.8:53 67.31.126.40.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 23.79.56.45.in-addr.arpa udp
N/A 127.0.0.1:6800 tcp
US 45.56.79.23:80 www.aieov.com tcp
US 8.8.8.8:53 5isohu.com udp
US 8.8.8.8:53 oth.eve.mdt.qq.com udp
US 8.8.8.8:53 unifiedaccess.gameloop.com udp
DE 49.51.129.71:443 unifiedaccess.gameloop.com tcp
SG 101.33.47.68:8081 oth.eve.mdt.qq.com tcp
US 8.8.8.8:53 ocsp.digicert.cn udp
GB 163.181.57.234:80 ocsp.digicert.cn tcp
US 8.8.8.8:53 71.129.51.49.in-addr.arpa udp
SG 101.33.47.68:8081 oth.eve.mdt.qq.com tcp
SG 101.33.47.68:8081 oth.eve.mdt.qq.com tcp
SG 101.33.47.68:8081 oth.eve.mdt.qq.com tcp
US 8.8.8.8:53 68.47.33.101.in-addr.arpa udp
US 8.8.8.8:53 234.57.181.163.in-addr.arpa udp
US 45.56.79.23:80 www.aieov.com tcp
US 8.8.8.8:53 5isohu.com udp
US 8.8.8.8:53 196.249.167.52.in-addr.arpa udp
US 45.56.79.23:80 www.aieov.com tcp
US 8.8.8.8:53 183.59.114.20.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 8.8.8.8:53 45.56.20.217.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
IE 52.111.236.23:443 tcp
US 8.8.8.8:53 21.236.111.52.in-addr.arpa udp
US 8.8.8.8:53 14.173.189.20.in-addr.arpa udp

Files

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

MD5 7574cf2c64f35161ab1292e2f532aabf
SHA1 14ba3fa927a06224dfe587014299e834def4644f
SHA256 de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085
SHA512 4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab

memory/3864-4-0x0000000010000000-0x0000000010030000-memory.dmp

memory/3864-6-0x0000000000401000-0x0000000000402000-memory.dmp

memory/3864-7-0x0000000000400000-0x00000000008A5000-memory.dmp

memory/3864-10-0x0000000000400000-0x00000000008A5000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\dr.dll

MD5 e58c7d21a08f8038f2d69cbbae4e7484
SHA1 3be5356e6a32a52d929b3bd2bc13f234ae82801d
SHA256 7083bba256b59c5e9ba62f700b858e0968169653cec8284e5e0c6e0098e9e191
SHA512 e1429957e7a7c9fd8299d9ba451006351457e4e6b9485ee5ed74d427c8b2807270c101ec1eb57e1f20b62541655c8a615dc07056b62ba944cbc19c314e85d65f

memory/3864-25-0x0000000010000000-0x0000000010030000-memory.dmp

memory/3864-26-0x0000000000400000-0x00000000008A5000-memory.dmp

memory/3864-27-0x0000000000400000-0x00000000008A5000-memory.dmp

memory/3864-28-0x0000000010000000-0x0000000010030000-memory.dmp

memory/3864-29-0x0000000000400000-0x00000000008A5000-memory.dmp

memory/3864-35-0x0000000010000000-0x0000000010030000-memory.dmp

memory/3864-33-0x0000000000400000-0x00000000008A5000-memory.dmp