Malware Analysis Report

2025-06-16 02:04

Sample ID 240728-gk1njs1ell
Target 5c36b3d4c100578156b3b2aa588eead0N.exe
SHA256 7482216f4674c89160280b83dc34d219976972aa0f8d14850ee9be192b587a7c
Tags
discovery persistence privilege_escalation upx backdoor floxif
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

7482216f4674c89160280b83dc34d219976972aa0f8d14850ee9be192b587a7c

Threat Level: Known bad

The file 5c36b3d4c100578156b3b2aa588eead0N.exe was found to be: Known bad.

Malicious Activity Summary

discovery persistence privilege_escalation upx backdoor floxif

Detects Floxif payload

Floxif family

Event Triggered Execution: AppInit DLLs

ACProtect 1.3x - 1.4x DLL software

UPX packed file

System Location Discovery: System Language Discovery

Unsigned PE

Program crash

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-07-28 05:52

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 05:52

Reported

2024-07-28 05:55

Platform

win7-20240705-en

Max time kernel

111s

Max time network

19s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\5c36b3d4c100578156b3b2aa588eead0N.dll,#1

Signatures

Event Triggered Execution: AppInit DLLs

persistence privilege_escalation

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

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

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\5c36b3d4c100578156b3b2aa588eead0N.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\5c36b3d4c100578156b3b2aa588eead0N.dll,#1

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 548 -s 332

Network

N/A

Files

memory/548-0-0x0000000010000000-0x0000000010030000-memory.dmp

memory/548-2-0x0000000010000000-0x0000000010030000-memory.dmp

memory/548-1-0x0000000010000000-0x0000000010030000-memory.dmp

memory/548-3-0x0000000010000000-0x0000000010030000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-07-28 05:52

Reported

2024-07-28 05:55

Platform

win10v2004-20240709-en

Max time kernel

91s

Max time network

98s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\5c36b3d4c100578156b3b2aa588eead0N.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 3044 wrote to memory of 3828 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 3044 wrote to memory of 3828 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 3044 wrote to memory of 3828 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\5c36b3d4c100578156b3b2aa588eead0N.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\5c36b3d4c100578156b3b2aa588eead0N.dll,#1

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3828 -ip 3828

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 3828 -s 700

Network

Country Destination Domain Proto
US 8.8.8.8:53 140.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.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 8.8.8.8:53 154.239.44.20.in-addr.arpa udp
US 8.8.8.8:53 237.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 58.55.71.13.in-addr.arpa udp
US 8.8.8.8:53 103.169.127.40.in-addr.arpa udp
US 8.8.8.8:53 18.31.95.13.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

memory/3828-0-0x0000000010000000-0x0000000010030000-memory.dmp

memory/3828-1-0x0000000010000000-0x0000000010030000-memory.dmp