Malware Analysis Report

2025-06-16 02:05

Sample ID 240728-e1vfcs1enc
Target c6aa50c1d1363125ccc680b81325ba020024d9c1340d77f68493ca18b8825679
SHA256 c6aa50c1d1363125ccc680b81325ba020024d9c1340d77f68493ca18b8825679
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

c6aa50c1d1363125ccc680b81325ba020024d9c1340d77f68493ca18b8825679

Threat Level: Known bad

The file c6aa50c1d1363125ccc680b81325ba020024d9c1340d77f68493ca18b8825679 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

Drops file in Program Files directory

System Location Discovery: System Language Discovery

Suspicious use of AdjustPrivilegeToken

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-07-28 04:24

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-07-28 04:24

Reported

2024-07-28 04:27

Platform

win7-20240704-en

Max time kernel

118s

Max time network

123s

Command Line

"C:\Users\Admin\AppData\Local\Temp\c6aa50c1d1363125ccc680b81325ba020024d9c1340d77f68493ca18b8825679.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

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\c6aa50c1d1363125ccc680b81325ba020024d9c1340d77f68493ca18b8825679.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\c6aa50c1d1363125ccc680b81325ba020024d9c1340d77f68493ca18b8825679.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\c6aa50c1d1363125ccc680b81325ba020024d9c1340d77f68493ca18b8825679.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\c6aa50c1d1363125ccc680b81325ba020024d9c1340d77f68493ca18b8825679.exe

"C:\Users\Admin\AppData\Local\Temp\c6aa50c1d1363125ccc680b81325ba020024d9c1340d77f68493ca18b8825679.exe"

Network

N/A

Files

memory/2488-3-0x0000000010000000-0x0000000010030000-memory.dmp

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

MD5 7574cf2c64f35161ab1292e2f532aabf
SHA1 14ba3fa927a06224dfe587014299e834def4644f
SHA256 de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085
SHA512 4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab

memory/2488-5-0x00000000000A0000-0x00000000000D7000-memory.dmp

memory/2488-6-0x0000000010000000-0x0000000010030000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-07-28 04:24

Reported

2024-07-28 04:27

Platform

win10v2004-20240704-en

Max time kernel

150s

Max time network

153s

Command Line

"C:\Users\Admin\AppData\Local\Temp\c6aa50c1d1363125ccc680b81325ba020024d9c1340d77f68493ca18b8825679.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

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\c6aa50c1d1363125ccc680b81325ba020024d9c1340d77f68493ca18b8825679.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\c6aa50c1d1363125ccc680b81325ba020024d9c1340d77f68493ca18b8825679.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\c6aa50c1d1363125ccc680b81325ba020024d9c1340d77f68493ca18b8825679.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\c6aa50c1d1363125ccc680b81325ba020024d9c1340d77f68493ca18b8825679.exe

"C:\Users\Admin\AppData\Local\Temp\c6aa50c1d1363125ccc680b81325ba020024d9c1340d77f68493ca18b8825679.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 183.142.211.20.in-addr.arpa udp
US 8.8.8.8:53 72.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 55.36.223.20.in-addr.arpa udp
US 8.8.8.8:53 232.168.11.51.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 157.123.68.40.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 10.27.171.150.in-addr.arpa udp
US 8.8.8.8:53 195.201.50.20.in-addr.arpa udp

Files

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

MD5 7574cf2c64f35161ab1292e2f532aabf
SHA1 14ba3fa927a06224dfe587014299e834def4644f
SHA256 de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085
SHA512 4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab

memory/4396-2-0x0000000010000000-0x0000000010030000-memory.dmp

memory/4396-7-0x0000000010000000-0x0000000010030000-memory.dmp

memory/4396-5-0x0000000000750000-0x0000000000787000-memory.dmp