Malware Analysis Report

2025-04-03 18:47

Sample ID 241109-vpehrs1ncr
Target 14dc564cbfec2c6a2b259d04c71558965a238b8f613b9562670f26f0feea0828N
SHA256 14dc564cbfec2c6a2b259d04c71558965a238b8f613b9562670f26f0feea0828
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

14dc564cbfec2c6a2b259d04c71558965a238b8f613b9562670f26f0feea0828

Threat Level: Known bad

The file 14dc564cbfec2c6a2b259d04c71558965a238b8f613b9562670f26f0feea0828N 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

UPX packed file

Unsigned PE

Program crash

System Location Discovery: System Language Discovery

Suspicious use of WriteProcessMemory

Suspicious use of AdjustPrivilegeToken

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-11-09 17:09

Signatures

Detects Floxif payload

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

Floxif family

floxif

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-11-09 17:09

Reported

2024-11-09 17:11

Platform

win7-20240903-en

Max time kernel

118s

Max time network

118s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\14dc564cbfec2c6a2b259d04c71558965a238b8f613b9562670f26f0feea0828N.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\14dc564cbfec2c6a2b259d04c71558965a238b8f613b9562670f26f0feea0828N.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\14dc564cbfec2c6a2b259d04c71558965a238b8f613b9562670f26f0feea0828N.dll,#1

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2780 -s 332

Network

N/A

Files

memory/2780-0-0x0000000010000000-0x0000000010033000-memory.dmp

memory/2780-1-0x0000000010000000-0x0000000010033000-memory.dmp

memory/2780-2-0x0000000010000000-0x0000000010033000-memory.dmp

memory/2780-3-0x0000000010000000-0x0000000010033000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-11-09 17:09

Reported

2024-11-09 17:11

Platform

win10v2004-20241007-en

Max time kernel

91s

Max time network

92s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\14dc564cbfec2c6a2b259d04c71558965a238b8f613b9562670f26f0feea0828N.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 2032 wrote to memory of 4504 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2032 wrote to memory of 4504 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2032 wrote to memory of 4504 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\14dc564cbfec2c6a2b259d04c71558965a238b8f613b9562670f26f0feea0828N.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\14dc564cbfec2c6a2b259d04c71558965a238b8f613b9562670f26f0feea0828N.dll,#1

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 4504 -ip 4504

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 4504 -s 692

Network

Country Destination Domain Proto
US 8.8.8.8:53 241.150.49.20.in-addr.arpa udp
US 8.8.8.8:53 140.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 104.219.191.52.in-addr.arpa udp
US 8.8.8.8:53 56.163.245.4.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 8.8.8.8:53 14.227.111.52.in-addr.arpa udp

Files

memory/4504-0-0x0000000010000000-0x0000000010033000-memory.dmp

memory/4504-1-0x0000000010000000-0x0000000010033000-memory.dmp