Malware Analysis Report

2025-06-16 02:04

Sample ID 240728-d91haszbrb
Target bf12d7893c50c8135f7da7ce8b7fa57d84e279e01558fafa331a2f4b9d06149e
SHA256 bf12d7893c50c8135f7da7ce8b7fa57d84e279e01558fafa331a2f4b9d06149e
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

bf12d7893c50c8135f7da7ce8b7fa57d84e279e01558fafa331a2f4b9d06149e

Threat Level: Known bad

The file bf12d7893c50c8135f7da7ce8b7fa57d84e279e01558fafa331a2f4b9d06149e was found to be: Known bad.

Malicious Activity Summary

floxif backdoor discovery trojan upx

Floxif, Floodfix

Detects Floxif payload

UPX packed file

ACProtect 1.3x - 1.4x DLL software

Loads dropped DLL

Enumerates connected drives

Drops file in System32 directory

Drops file in Program Files directory

System Location Discovery: System Language Discovery

Unsigned PE

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-07-28 03:43

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-07-28 03:43

Reported

2024-07-28 03:46

Platform

win7-20240705-en

Max time kernel

148s

Max time network

125s

Command Line

"C:\Users\Admin\AppData\Local\Temp\bf12d7893c50c8135f7da7ce8b7fa57d84e279e01558fafa331a2f4b9d06149e.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
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\bf12d7893c50c8135f7da7ce8b7fa57d84e279e01558fafa331a2f4b9d06149e.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\bf12d7893c50c8135f7da7ce8b7fa57d84e279e01558fafa331a2f4b9d06149e.exe N/A
File created \??\c:\program files\common files\system\symsrv.dll.000 C:\Users\Admin\AppData\Local\Temp\bf12d7893c50c8135f7da7ce8b7fa57d84e279e01558fafa331a2f4b9d06149e.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\bf12d7893c50c8135f7da7ce8b7fa57d84e279e01558fafa331a2f4b9d06149e.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\bf12d7893c50c8135f7da7ce8b7fa57d84e279e01558fafa331a2f4b9d06149e.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\bf12d7893c50c8135f7da7ce8b7fa57d84e279e01558fafa331a2f4b9d06149e.exe

"C:\Users\Admin\AppData\Local\Temp\bf12d7893c50c8135f7da7ce8b7fa57d84e279e01558fafa331a2f4b9d06149e.exe"

C:\Windows\splwow64.exe

C:\Windows\splwow64.exe 12288

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 45.33.2.79:80 www.aieov.com tcp
US 45.33.2.79:80 www.aieov.com tcp
US 45.33.2.79:80 www.aieov.com tcp
US 45.33.2.79:80 www.aieov.com tcp
US 45.33.2.79:80 www.aieov.com tcp
US 45.33.2.79:80 www.aieov.com tcp

Files

memory/588-3-0x0000000010000000-0x0000000010030000-memory.dmp

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

MD5 7574cf2c64f35161ab1292e2f532aabf
SHA1 14ba3fa927a06224dfe587014299e834def4644f
SHA256 de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085
SHA512 4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab

memory/588-12-0x0000000010000000-0x0000000010030000-memory.dmp

memory/588-11-0x0000000000400000-0x0000000000B93000-memory.dmp

memory/588-16-0x0000000010000000-0x0000000010030000-memory.dmp

memory/588-15-0x0000000000400000-0x0000000000B93000-memory.dmp

memory/588-20-0x0000000010000000-0x0000000010030000-memory.dmp

memory/588-19-0x0000000000400000-0x0000000000B93000-memory.dmp

memory/588-24-0x0000000010000000-0x0000000010030000-memory.dmp

memory/588-23-0x0000000000400000-0x0000000000B93000-memory.dmp

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

MD5 1130c911bf5db4b8f7cf9b6f4b457623
SHA1 48e734c4bc1a8b5399bff4954e54b268bde9d54c
SHA256 eba08cc8182f379392a97f542b350ea0dbbe5e4009472f35af20e3d857eafdf1
SHA512 94e2511ef2c53494c2aff0960266491ffc0e54e75185427d1ccedae27c286992c754ca94cbb0c9ea36e3f04cd4eb7f032c551cf2d4b309f292906303f1a75fa0

memory/588-28-0x0000000010000000-0x0000000010030000-memory.dmp

memory/588-27-0x0000000000400000-0x0000000000B93000-memory.dmp

memory/588-32-0x0000000010000000-0x0000000010030000-memory.dmp

memory/588-31-0x0000000000400000-0x0000000000B93000-memory.dmp

memory/588-33-0x0000000000400000-0x0000000000B93000-memory.dmp

memory/588-35-0x0000000000400000-0x0000000000B93000-memory.dmp

memory/588-37-0x0000000000400000-0x0000000000B93000-memory.dmp

memory/588-39-0x0000000000400000-0x0000000000B93000-memory.dmp

memory/588-41-0x0000000000400000-0x0000000000B93000-memory.dmp

memory/588-43-0x0000000000400000-0x0000000000B93000-memory.dmp

memory/588-45-0x0000000000400000-0x0000000000B93000-memory.dmp

memory/588-47-0x0000000000400000-0x0000000000B93000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-07-28 03:43

Reported

2024-07-28 03:46

Platform

win10v2004-20240704-en

Max time kernel

143s

Max time network

130s

Command Line

"C:\Users\Admin\AppData\Local\Temp\bf12d7893c50c8135f7da7ce8b7fa57d84e279e01558fafa331a2f4b9d06149e.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
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\bf12d7893c50c8135f7da7ce8b7fa57d84e279e01558fafa331a2f4b9d06149e.exe N/A

Drops file in System32 directory

Description Indicator Process Target
File opened for modification C:\Windows\system32\FxsTmp\fxsB0C2.tmp C:\Windows\splwow64.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\bf12d7893c50c8135f7da7ce8b7fa57d84e279e01558fafa331a2f4b9d06149e.exe N/A
File created C:\Program Files\Common Files\System\symsrv.dll C:\Users\Admin\AppData\Local\Temp\bf12d7893c50c8135f7da7ce8b7fa57d84e279e01558fafa331a2f4b9d06149e.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\bf12d7893c50c8135f7da7ce8b7fa57d84e279e01558fafa331a2f4b9d06149e.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\bf12d7893c50c8135f7da7ce8b7fa57d84e279e01558fafa331a2f4b9d06149e.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\bf12d7893c50c8135f7da7ce8b7fa57d84e279e01558fafa331a2f4b9d06149e.exe

"C:\Users\Admin\AppData\Local\Temp\bf12d7893c50c8135f7da7ce8b7fa57d84e279e01558fafa331a2f4b9d06149e.exe"

C:\Windows\splwow64.exe

C:\Windows\splwow64.exe 12288

Network

Country Destination Domain Proto
US 8.8.8.8:53 g.bing.com udp
US 13.107.21.237:443 g.bing.com tcp
US 8.8.8.8:53 237.21.107.13.in-addr.arpa udp
US 8.8.8.8:53 104.219.191.52.in-addr.arpa udp
US 8.8.8.8:53 23.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 43.58.199.20.in-addr.arpa udp
US 8.8.8.8:53 5isohu.com udp
US 8.8.8.8:53 www.aieov.com udp
US 45.33.2.79:80 www.aieov.com tcp
US 8.8.8.8:53 79.2.33.45.in-addr.arpa udp
US 8.8.8.8:53 133.211.185.52.in-addr.arpa udp
US 8.8.8.8:53 5isohu.com udp
US 45.33.2.79:80 www.aieov.com tcp
US 8.8.8.8:53 5isohu.com udp
US 45.33.2.79:80 www.aieov.com tcp
US 8.8.8.8:53 5isohu.com udp
US 45.33.2.79:80 www.aieov.com tcp
US 45.33.2.79:80 www.aieov.com tcp
US 8.8.8.8:53 5isohu.com udp
US 8.8.8.8:53 26.165.165.52.in-addr.arpa udp
US 45.33.2.79:80 www.aieov.com tcp
US 8.8.8.8:53 5isohu.com udp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp
US 8.8.8.8:53 192.142.123.92.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 8.8.8.8:53 13.227.111.52.in-addr.arpa udp
US 8.8.8.8:53 57.169.31.20.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp

Files

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

MD5 7574cf2c64f35161ab1292e2f532aabf
SHA1 14ba3fa927a06224dfe587014299e834def4644f
SHA256 de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085
SHA512 4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab

memory/3640-4-0x0000000010000000-0x0000000010030000-memory.dmp

memory/3640-13-0x0000000010000000-0x0000000010030000-memory.dmp

memory/3640-12-0x0000000000400000-0x0000000000B93000-memory.dmp

memory/3640-19-0x0000000010000000-0x0000000010030000-memory.dmp

memory/3640-18-0x0000000000400000-0x0000000000B93000-memory.dmp

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

MD5 1130c911bf5db4b8f7cf9b6f4b457623
SHA1 48e734c4bc1a8b5399bff4954e54b268bde9d54c
SHA256 eba08cc8182f379392a97f542b350ea0dbbe5e4009472f35af20e3d857eafdf1
SHA512 94e2511ef2c53494c2aff0960266491ffc0e54e75185427d1ccedae27c286992c754ca94cbb0c9ea36e3f04cd4eb7f032c551cf2d4b309f292906303f1a75fa0

memory/3640-25-0x0000000010000000-0x0000000010030000-memory.dmp

memory/3640-26-0x0000000010000000-0x0000000010030000-memory.dmp

memory/3640-24-0x0000000000400000-0x0000000000B93000-memory.dmp

memory/3640-30-0x0000000010000000-0x0000000010030000-memory.dmp

memory/3640-29-0x0000000000400000-0x0000000000B93000-memory.dmp

memory/3640-31-0x0000000000400000-0x0000000000B93000-memory.dmp

memory/3640-33-0x0000000000400000-0x0000000000B93000-memory.dmp

memory/3640-35-0x0000000000400000-0x0000000000B93000-memory.dmp

memory/3640-37-0x0000000000400000-0x0000000000B93000-memory.dmp

memory/3640-39-0x0000000000400000-0x0000000000B93000-memory.dmp

memory/3640-41-0x0000000000400000-0x0000000000B93000-memory.dmp

memory/3640-42-0x0000000010000000-0x0000000010030000-memory.dmp

memory/3640-43-0x0000000000400000-0x0000000000B93000-memory.dmp

memory/3640-45-0x0000000000400000-0x0000000000B93000-memory.dmp

memory/3640-47-0x0000000000400000-0x0000000000B93000-memory.dmp

memory/3640-49-0x0000000000400000-0x0000000000B93000-memory.dmp