Malware Analysis Report

2024-12-08 02:42

Sample ID 240912-sgykkazhph
Target 64079897271f633df0472383254febc0N
SHA256 a664e712da0b02b935330bfb4bb5a56ab8715f12a568399cdb2e9ac18e18e0f9
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

a664e712da0b02b935330bfb4bb5a56ab8715f12a568399cdb2e9ac18e18e0f9

Threat Level: Known bad

The file 64079897271f633df0472383254febc0N 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

Network Service Discovery

Program crash

System Location Discovery: System Language Discovery

Unsigned PE

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-09-12 15:06

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 15:06

Reported

2024-09-12 15:08

Platform

win7-20240903-en

Max time kernel

117s

Max time network

118s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\64079897271f633df0472383254febc0N.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
N/A N/A N/A N/A

Network Service Discovery

discovery
Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\arp.exe 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\arp.exe N/A
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
Token: SeDebugPrivilege N/A C:\Windows\SysWOW64\arp.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2260 wrote to memory of 2664 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2260 wrote to memory of 2664 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2260 wrote to memory of 2664 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2260 wrote to memory of 2664 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2260 wrote to memory of 2664 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2260 wrote to memory of 2664 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2260 wrote to memory of 2664 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2664 wrote to memory of 2676 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\arp.exe
PID 2664 wrote to memory of 2676 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\arp.exe
PID 2664 wrote to memory of 2676 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\arp.exe
PID 2664 wrote to memory of 2676 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\arp.exe
PID 2664 wrote to memory of 2712 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\WerFault.exe
PID 2664 wrote to memory of 2712 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\WerFault.exe
PID 2664 wrote to memory of 2712 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\WerFault.exe
PID 2664 wrote to memory of 2712 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\WerFault.exe

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\64079897271f633df0472383254febc0N.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\64079897271f633df0472383254febc0N.dll,#1

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2664 -s 332

C:\Windows\SysWOW64\arp.exe

arp -a

Network

N/A

Files

memory/2664-0-0x0000000010000000-0x0000000010033000-memory.dmp

memory/2676-1-0x0000000010000000-0x0000000010033000-memory.dmp

memory/2676-3-0x0000000010000000-0x0000000010033000-memory.dmp

memory/2664-4-0x0000000010000000-0x0000000010033000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-09-12 15:06

Reported

2024-09-12 15:08

Platform

win10v2004-20240802-en

Max time kernel

94s

Max time network

104s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\64079897271f633df0472383254febc0N.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\arp.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\arp.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\arp.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\arp.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\rundll32.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\arp.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\arp.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\arp.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\arp.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\arp.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 3668 wrote to memory of 5036 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 3668 wrote to memory of 5036 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 3668 wrote to memory of 5036 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 5036 wrote to memory of 2328 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\arp.exe
PID 5036 wrote to memory of 2328 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\arp.exe
PID 5036 wrote to memory of 2328 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\arp.exe
PID 5036 wrote to memory of 1248 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\arp.exe
PID 5036 wrote to memory of 1248 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\arp.exe
PID 5036 wrote to memory of 1248 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\arp.exe
PID 5036 wrote to memory of 232 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\arp.exe
PID 5036 wrote to memory of 232 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\arp.exe
PID 5036 wrote to memory of 232 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\arp.exe
PID 5036 wrote to memory of 4884 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\arp.exe
PID 5036 wrote to memory of 4884 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\arp.exe
PID 5036 wrote to memory of 4884 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\arp.exe
PID 5036 wrote to memory of 3440 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\arp.exe
PID 5036 wrote to memory of 3440 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\arp.exe
PID 5036 wrote to memory of 3440 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\arp.exe
PID 5036 wrote to memory of 1544 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\arp.exe
PID 5036 wrote to memory of 1544 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\arp.exe
PID 5036 wrote to memory of 1544 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\arp.exe
PID 5036 wrote to memory of 3420 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\arp.exe
PID 5036 wrote to memory of 3420 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\arp.exe
PID 5036 wrote to memory of 3420 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\arp.exe
PID 5036 wrote to memory of 2920 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\arp.exe
PID 5036 wrote to memory of 2920 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\arp.exe
PID 5036 wrote to memory of 2920 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\arp.exe
PID 5036 wrote to memory of 3828 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\arp.exe
PID 5036 wrote to memory of 3828 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\arp.exe
PID 5036 wrote to memory of 3828 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\arp.exe

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\64079897271f633df0472383254febc0N.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\64079897271f633df0472383254febc0N.dll,#1

C:\Windows\SysWOW64\arp.exe

arp -a

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 5036 -ip 5036

C:\Windows\SysWOW64\arp.exe

arp -s 10.127.0.1 6c-ab-37-f8-cd-b2

C:\Windows\SysWOW64\arp.exe

arp -s 10.127.255.255 a1-e9-67-5b-1e-c3

C:\Windows\SysWOW64\arp.exe

arp -s 37.27.61.180 85-f4-6d-e0-08-31

C:\Windows\SysWOW64\arp.exe

arp -s 224.0.0.22 8c-ca-77-4d-90-54

C:\Windows\SysWOW64\arp.exe

arp -s 224.0.0.251 82-91-a9-84-8d-86

C:\Windows\SysWOW64\arp.exe

arp -s 224.0.0.252 13-94-4c-4c-8f-a4

C:\Windows\SysWOW64\arp.exe

arp -s 239.255.255.250 71-36-52-a4-97-03

C:\Windows\SysWOW64\arp.exe

arp -s 255.255.255.255 f3-97-47-9d-fc-f5

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 5036 -s 708

Network

Country Destination Domain Proto
US 8.8.8.8:53 58.55.71.13.in-addr.arpa udp
US 8.8.8.8:53 81.144.22.2.in-addr.arpa udp
US 8.8.8.8:53 75.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 104.219.191.52.in-addr.arpa udp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 73.144.22.2.in-addr.arpa udp
US 8.8.8.8:53 22.236.111.52.in-addr.arpa udp
US 8.8.8.8:53 43.56.20.217.in-addr.arpa udp

Files

memory/5036-0-0x0000000010000000-0x0000000010033000-memory.dmp

memory/5036-2-0x0000000010000000-0x0000000010033000-memory.dmp