Malware Analysis Report

2024-12-08 02:42

Sample ID 240913-cnrgtsygpc
Target b7a1cfed5723e322db150a4914bff0b0N
SHA256 3a8bb4c7594d73de23d089067701fe44d696b25701d7b22cd0cb8f8a5db66e8e
Tags
backdoor upx floxif discovery
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

3a8bb4c7594d73de23d089067701fe44d696b25701d7b22cd0cb8f8a5db66e8e

Threat Level: Known bad

The file b7a1cfed5723e322db150a4914bff0b0N was found to be: Known bad.

Malicious Activity Summary

backdoor upx floxif discovery

Floxif family

Detects Floxif payload

ACProtect 1.3x - 1.4x DLL software

UPX packed file

Network Service Discovery

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 02:13

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 02:13

Reported

2024-09-13 02:15

Platform

win7-20240903-en

Max time kernel

117s

Max time network

118s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\b7a1cfed5723e322db150a4914bff0b0N.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

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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2112 wrote to memory of 1792 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2112 wrote to memory of 1792 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2112 wrote to memory of 1792 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2112 wrote to memory of 1792 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2112 wrote to memory of 1792 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2112 wrote to memory of 1792 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2112 wrote to memory of 1792 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1792 wrote to memory of 3056 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\WerFault.exe
PID 1792 wrote to memory of 3056 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\WerFault.exe
PID 1792 wrote to memory of 3056 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\WerFault.exe
PID 1792 wrote to memory of 3056 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\WerFault.exe
PID 1792 wrote to memory of 2300 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\arp.exe
PID 1792 wrote to memory of 2300 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\arp.exe
PID 1792 wrote to memory of 2300 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\arp.exe
PID 1792 wrote to memory of 2300 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\b7a1cfed5723e322db150a4914bff0b0N.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\b7a1cfed5723e322db150a4914bff0b0N.dll,#1

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 1792 -s 232

C:\Windows\SysWOW64\arp.exe

arp -a

Network

N/A

Files

memory/1792-0-0x0000000010000000-0x0000000010033000-memory.dmp

memory/1792-1-0x0000000010000000-0x0000000010033000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-09-13 02:13

Reported

2024-09-13 02:15

Platform

win10v2004-20240802-en

Max time kernel

95s

Max time network

102s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\b7a1cfed5723e322db150a4914bff0b0N.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\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
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 3764 wrote to memory of 1988 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 3764 wrote to memory of 1988 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 3764 wrote to memory of 1988 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1988 wrote to memory of 3916 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\arp.exe
PID 1988 wrote to memory of 3916 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\arp.exe
PID 1988 wrote to memory of 3916 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\arp.exe
PID 1988 wrote to memory of 3308 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\arp.exe
PID 1988 wrote to memory of 3308 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\arp.exe
PID 1988 wrote to memory of 3308 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\arp.exe
PID 1988 wrote to memory of 1604 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\arp.exe
PID 1988 wrote to memory of 1604 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\arp.exe
PID 1988 wrote to memory of 1604 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\arp.exe
PID 1988 wrote to memory of 3480 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\arp.exe
PID 1988 wrote to memory of 3480 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\arp.exe
PID 1988 wrote to memory of 3480 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\arp.exe
PID 1988 wrote to memory of 2084 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\arp.exe
PID 1988 wrote to memory of 2084 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\arp.exe
PID 1988 wrote to memory of 2084 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\arp.exe
PID 1988 wrote to memory of 1152 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\arp.exe
PID 1988 wrote to memory of 1152 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\arp.exe
PID 1988 wrote to memory of 1152 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\arp.exe
PID 1988 wrote to memory of 4984 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\arp.exe
PID 1988 wrote to memory of 4984 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\arp.exe
PID 1988 wrote to memory of 4984 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\arp.exe
PID 1988 wrote to memory of 1196 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\arp.exe
PID 1988 wrote to memory of 1196 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\arp.exe
PID 1988 wrote to memory of 1196 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\arp.exe
PID 1988 wrote to memory of 2492 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\arp.exe
PID 1988 wrote to memory of 2492 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\arp.exe
PID 1988 wrote to memory of 2492 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\b7a1cfed5723e322db150a4914bff0b0N.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\b7a1cfed5723e322db150a4914bff0b0N.dll,#1

C:\Windows\SysWOW64\arp.exe

arp -a

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 1988 -ip 1988

C:\Windows\SysWOW64\arp.exe

arp -s 10.127.0.1 1b-64-14-a6-65-bb

C:\Windows\SysWOW64\arp.exe

arp -s 10.127.255.255 cc-e0-ff-3f-8c-b7

C:\Windows\SysWOW64\arp.exe

arp -s 49.12.169.208 67-4b-dc-8f-1f-90

C:\Windows\SysWOW64\arp.exe

arp -s 224.0.0.22 a9-d3-af-6f-c3-86

C:\Windows\SysWOW64\arp.exe

arp -s 224.0.0.251 f3-c9-39-03-f9-95

C:\Windows\SysWOW64\arp.exe

arp -s 224.0.0.252 bd-a7-c4-98-49-93

C:\Windows\SysWOW64\arp.exe

arp -s 239.255.255.250 0c-13-a8-fe-04-6a

C:\Windows\SysWOW64\arp.exe

arp -s 255.255.255.255 c6-ec-71-a4-b5-26

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 1988 -s 704

Network

Country Destination Domain Proto
US 8.8.8.8:53 217.106.137.52.in-addr.arpa udp
US 8.8.8.8:53 81.144.22.2.in-addr.arpa udp
US 8.8.8.8:53 71.31.126.40.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 28.118.140.52.in-addr.arpa udp
US 8.8.8.8:53 183.59.114.20.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 52.111.227.13:443 tcp
US 8.8.8.8:53 48.229.111.52.in-addr.arpa udp

Files

memory/1988-0-0x0000000010000000-0x0000000010033000-memory.dmp

memory/1988-2-0x0000000010000000-0x0000000010033000-memory.dmp