Malware Analysis Report

2024-12-08 02:36

Sample ID 240912-3shnlasfqa
Target 4bd072df920962583522681dd315c640N
SHA256 bbf3fb1949cd176ca93061cc55787a1d4dd212737bb7cf3f5988591596345346
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

bbf3fb1949cd176ca93061cc55787a1d4dd212737bb7cf3f5988591596345346

Threat Level: Known bad

The file 4bd072df920962583522681dd315c640N 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

Program crash

Unsigned PE

System Location Discovery: System Language Discovery

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-09-12 23:46

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

2024-09-12 23:46

Reported

2024-09-12 23:48

Platform

win7-20240708-en

Max time kernel

119s

Max time network

120s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\4bd072df920962583522681dd315c640N.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\4bd072df920962583522681dd315c640N.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\4bd072df920962583522681dd315c640N.dll,#1

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2404 -s 332

Network

N/A

Files

memory/2404-1-0x0000000010000000-0x0000000010030000-memory.dmp

memory/2404-0-0x0000000010000000-0x0000000010030000-memory.dmp

memory/2404-2-0x0000000010000000-0x0000000010030000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-09-12 23:46

Reported

2024-09-12 23:48

Platform

win10v2004-20240802-en

Max time kernel

115s

Max time network

122s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\4bd072df920962583522681dd315c640N.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 2356 wrote to memory of 220 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2356 wrote to memory of 220 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2356 wrote to memory of 220 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\4bd072df920962583522681dd315c640N.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\4bd072df920962583522681dd315c640N.dll,#1

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 220 -ip 220

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 220 -s 704

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe

"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --field-trial-handle=4056,i,5469445176230119590,7931734017267321834,262144 --variations-seed-version --mojo-platform-channel-handle=3956 /prefetch:8

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 58.55.71.13.in-addr.arpa udp
US 8.8.8.8:53 240.143.123.92.in-addr.arpa udp
US 8.8.8.8:53 68.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 196.249.167.52.in-addr.arpa udp
US 8.8.8.8:53 157.123.68.40.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 8.8.8.8:53 217.135.221.88.in-addr.arpa udp
US 8.8.8.8:53 11.227.111.52.in-addr.arpa udp
US 8.8.8.8:53 0.205.248.87.in-addr.arpa udp
US 8.8.8.8:53 209.143.182.52.in-addr.arpa udp

Files

memory/220-0-0x0000000010000000-0x0000000010030000-memory.dmp

memory/220-2-0x0000000010000000-0x0000000010030000-memory.dmp