Malware Analysis Report

2025-06-16 02:04

Sample ID 240728-fgnddayfkj
Target d7f236e43419d96ab2dade814af6f6bd9c422eab0b9a8ed412bb58833e3a1ba7
SHA256 d7f236e43419d96ab2dade814af6f6bd9c422eab0b9a8ed412bb58833e3a1ba7
Tags
backdoor upx floxif discovery
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

d7f236e43419d96ab2dade814af6f6bd9c422eab0b9a8ed412bb58833e3a1ba7

Threat Level: Known bad

The file d7f236e43419d96ab2dade814af6f6bd9c422eab0b9a8ed412bb58833e3a1ba7 was found to be: Known bad.

Malicious Activity Summary

backdoor upx floxif discovery

Detects Floxif payload

Floxif family

ACProtect 1.3x - 1.4x DLL software

UPX packed file

System Location Discovery: System Language Discovery

Program crash

Unsigned PE

Suspicious use of WriteProcessMemory

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-07-28 04:50

Signatures

Detects Floxif payload

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

Floxif family

floxif

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

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-07-28 04:50

Reported

2024-07-28 04:54

Platform

win7-20240708-en

Max time kernel

140s

Max time network

127s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\d7f236e43419d96ab2dade814af6f6bd9c422eab0b9a8ed412bb58833e3a1ba7.dll,#1

Signatures

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

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 behavior: EnumeratesProcesses

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

Suspicious use of AdjustPrivilegeToken

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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2252 wrote to memory of 2276 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2252 wrote to memory of 2276 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2252 wrote to memory of 2276 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2252 wrote to memory of 2276 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2252 wrote to memory of 2276 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2252 wrote to memory of 2276 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2252 wrote to memory of 2276 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\d7f236e43419d96ab2dade814af6f6bd9c422eab0b9a8ed412bb58833e3a1ba7.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\d7f236e43419d96ab2dade814af6f6bd9c422eab0b9a8ed412bb58833e3a1ba7.dll,#1

Network

N/A

Files

memory/2276-0-0x0000000010000000-0x0000000010030000-memory.dmp

memory/2276-1-0x0000000010000000-0x0000000010030000-memory.dmp

memory/2276-2-0x0000000010000000-0x0000000010030000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-07-28 04:50

Reported

2024-07-28 04:54

Platform

win10v2004-20240709-en

Max time kernel

137s

Max time network

133s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\d7f236e43419d96ab2dade814af6f6bd9c422eab0b9a8ed412bb58833e3a1ba7.dll,#1

Signatures

UPX packed file

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

Program crash

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

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 AdjustPrivilegeToken

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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 3048 wrote to memory of 1328 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 3048 wrote to memory of 1328 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 3048 wrote to memory of 1328 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\d7f236e43419d96ab2dade814af6f6bd9c422eab0b9a8ed412bb58833e3a1ba7.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\d7f236e43419d96ab2dade814af6f6bd9c422eab0b9a8ed412bb58833e3a1ba7.dll,#1

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 1328 -ip 1328

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 1328 -s 704

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 g.bing.com udp
US 204.79.197.237:443 g.bing.com tcp
US 8.8.8.8:53 237.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 71.31.126.40.in-addr.arpa udp
US 8.8.8.8:53 43.58.199.20.in-addr.arpa udp
US 8.8.8.8:53 183.142.211.20.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 8.8.8.8:53 103.169.127.40.in-addr.arpa udp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
NL 52.111.243.31:443 tcp
US 8.8.8.8:53 13.227.111.52.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 88.156.103.20.in-addr.arpa udp

Files

memory/1328-0-0x0000000010000000-0x0000000010030000-memory.dmp

memory/1328-1-0x0000000010000000-0x0000000010030000-memory.dmp