Malware Analysis Report

2025-01-02 07:26

Sample ID 240913-12k4za1glk
Target 5de8ab20fc69e9b1a7588c395267e6956c6ea1658ec5a8cffb206c32e896e8b9
SHA256 5de8ab20fc69e9b1a7588c395267e6956c6ea1658ec5a8cffb206c32e896e8b9
Tags
backdoor upx floxif discovery persistence privilege_escalation
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

5de8ab20fc69e9b1a7588c395267e6956c6ea1658ec5a8cffb206c32e896e8b9

Threat Level: Known bad

The file 5de8ab20fc69e9b1a7588c395267e6956c6ea1658ec5a8cffb206c32e896e8b9 was found to be: Known bad.

Malicious Activity Summary

backdoor upx floxif discovery persistence privilege_escalation

Detects Floxif payload

Floxif family

Event Triggered Execution: AppInit DLLs

ACProtect 1.3x - 1.4x DLL software

UPX packed file

Unsigned PE

Program crash

System Location Discovery: System Language Discovery

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-09-13 22:08

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

2024-09-13 22:08

Reported

2024-09-13 22:11

Platform

win7-20240903-en

Max time kernel

141s

Max time network

119s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\5de8ab20fc69e9b1a7588c395267e6956c6ea1658ec5a8cffb206c32e896e8b9.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

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\5de8ab20fc69e9b1a7588c395267e6956c6ea1658ec5a8cffb206c32e896e8b9.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\5de8ab20fc69e9b1a7588c395267e6956c6ea1658ec5a8cffb206c32e896e8b9.dll,#1

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2092 -s 304

Network

N/A

Files

memory/2092-0-0x0000000010000000-0x0000000010030000-memory.dmp

memory/2092-1-0x0000000010000000-0x0000000010030000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-09-13 22:08

Reported

2024-09-13 22:11

Platform

win10v2004-20240802-en

Max time kernel

93s

Max time network

143s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\5de8ab20fc69e9b1a7588c395267e6956c6ea1658ec5a8cffb206c32e896e8b9.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

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 380 wrote to memory of 4412 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 380 wrote to memory of 4412 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 380 wrote to memory of 4412 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\5de8ab20fc69e9b1a7588c395267e6956c6ea1658ec5a8cffb206c32e896e8b9.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\5de8ab20fc69e9b1a7588c395267e6956c6ea1658ec5a8cffb206c32e896e8b9.dll,#1

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 368 -p 4412 -ip 4412

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 4412 -s 668

Network

Country Destination Domain Proto
US 8.8.8.8:53 209.205.72.20.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 23.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 228.249.119.40.in-addr.arpa udp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
US 8.8.8.8:53 217.135.221.88.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 43.229.111.52.in-addr.arpa udp

Files

memory/4412-0-0x0000000010000000-0x0000000010030000-memory.dmp

memory/4412-2-0x0000000010000000-0x0000000010030000-memory.dmp