Malware Analysis Report

2024-12-08 02:45

Sample ID 240817-jsnp3aybrk
Target 8318908a5e3205e6a7c2b18b30c6a2a0N.exe
SHA256 e6fabd8c145dc7e3161fa59963bc7aeaf5624f92d3181304ef0d91d0560f7189
Tags
discovery upx backdoor floxif
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

e6fabd8c145dc7e3161fa59963bc7aeaf5624f92d3181304ef0d91d0560f7189

Threat Level: Known bad

The file 8318908a5e3205e6a7c2b18b30c6a2a0N.exe was found to be: Known bad.

Malicious Activity Summary

discovery upx backdoor floxif

Detects Floxif payload

Floxif family

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

2024-08-17 07:56

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: behavioral2

Detonation Overview

Submitted

2024-08-17 07:56

Reported

2024-08-17 07:58

Platform

win10v2004-20240802-en

Max time kernel

98s

Max time network

123s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\8318908a5e3205e6a7c2b18b30c6a2a0N.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 4172 wrote to memory of 3520 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 4172 wrote to memory of 3520 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 4172 wrote to memory of 3520 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\8318908a5e3205e6a7c2b18b30c6a2a0N.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\8318908a5e3205e6a7c2b18b30c6a2a0N.dll,#1

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3520 -ip 3520

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 3520 -s 712

Network

Country Destination Domain Proto
US 8.8.8.8:53 28.118.140.52.in-addr.arpa udp
US 8.8.8.8:53 g.bing.com udp
US 8.8.8.8:53 81.144.22.2.in-addr.arpa udp
US 204.79.197.237:443 g.bing.com tcp
US 8.8.8.8:53 74.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 237.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 149.220.183.52.in-addr.arpa udp
US 8.8.8.8:53 26.165.165.52.in-addr.arpa udp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp
US 8.8.8.8:53 192.142.123.92.in-addr.arpa udp
US 8.8.8.8:53 57.169.31.20.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 52.111.229.48:443 tcp
US 8.8.8.8:53 240.143.123.92.in-addr.arpa udp
US 8.8.8.8:53 43.229.111.52.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
US 8.8.8.8:53 205.47.74.20.in-addr.arpa udp
US 8.8.8.8:53 10.28.171.150.in-addr.arpa udp

Files

memory/3520-0-0x0000000010000000-0x0000000010030000-memory.dmp

memory/3520-2-0x0000000010000000-0x0000000010030000-memory.dmp

Analysis: behavioral1

Detonation Overview

Submitted

2024-08-17 07:56

Reported

2024-08-17 07:58

Platform

win7-20240704-en

Max time kernel

111s

Max time network

19s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\8318908a5e3205e6a7c2b18b30c6a2a0N.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
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\8318908a5e3205e6a7c2b18b30c6a2a0N.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\8318908a5e3205e6a7c2b18b30c6a2a0N.dll,#1

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2280 -s 332

Network

N/A

Files

memory/2280-2-0x0000000010000000-0x0000000010030000-memory.dmp

memory/2280-3-0x0000000010000000-0x0000000010030000-memory.dmp

memory/2280-1-0x0000000010000000-0x0000000010030000-memory.dmp

memory/2280-4-0x0000000000030000-0x0000000000031000-memory.dmp

memory/2280-0-0x0000000010000000-0x0000000010030000-memory.dmp

memory/2280-8-0x0000000010000000-0x0000000010030000-memory.dmp