Malware Analysis Report

2025-01-02 07:26

Sample ID 240913-wl4h6a1cpb
Target e9e100d397b476b228f807585980dca30da30460fbd6423791a955567887ff1b
SHA256 e9e100d397b476b228f807585980dca30da30460fbd6423791a955567887ff1b
Tags
floxif backdoor discovery trojan upx 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

e9e100d397b476b228f807585980dca30da30460fbd6423791a955567887ff1b

Threat Level: Known bad

The file e9e100d397b476b228f807585980dca30da30460fbd6423791a955567887ff1b was found to be: Known bad.

Malicious Activity Summary

floxif backdoor discovery trojan upx persistence privilege_escalation

Floxif, Floodfix

Detects Floxif payload

Event Triggered Execution: AppInit DLLs

Loads dropped DLL

UPX packed file

ACProtect 1.3x - 1.4x DLL software

Enumerates connected drives

Drops file in Program Files directory

Program crash

System Location Discovery: System Language Discovery

Suspicious behavior: EnumeratesProcesses

Suspicious use of WriteProcessMemory

Suspicious use of AdjustPrivilegeToken

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-09-13 18:01

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-09-13 18:01

Reported

2024-09-13 18:04

Platform

win7-20240903-en

Max time kernel

140s

Max time network

123s

Command Line

"C:\Users\Admin\AppData\Local\Temp\e9e100d397b476b228f807585980dca30da30460fbd6423791a955567887ff1b.exe"

Signatures

Floxif, Floodfix

backdoor trojan floxif

Detects Floxif payload

backdoor
Description Indicator Process Target
N/A N/A N/A N/A

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
N/A N/A N/A N/A
N/A N/A N/A N/A

Drops file in Program Files directory

Description Indicator Process Target
File created C:\Program Files\Common Files\System\symsrv.dll C:\Users\Admin\AppData\Local\Temp\e9e100d397b476b228f807585980dca30da30460fbd6423791a955567887ff1b.exe N/A

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\e9e100d397b476b228f807585980dca30da30460fbd6423791a955567887ff1b.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\e9e100d397b476b228f807585980dca30da30460fbd6423791a955567887ff1b.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\e9e100d397b476b228f807585980dca30da30460fbd6423791a955567887ff1b.exe

"C:\Users\Admin\AppData\Local\Temp\e9e100d397b476b228f807585980dca30da30460fbd6423791a955567887ff1b.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2692 -s 440

Network

N/A

Files

\Program Files\Common Files\System\symsrv.dll

MD5 7574cf2c64f35161ab1292e2f532aabf
SHA1 14ba3fa927a06224dfe587014299e834def4644f
SHA256 de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085
SHA512 4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab

memory/2692-3-0x0000000010000000-0x0000000010030000-memory.dmp

memory/2692-5-0x0000000000401000-0x0000000000402000-memory.dmp

memory/2692-6-0x0000000000400000-0x00000000008A5000-memory.dmp

memory/2692-7-0x0000000010000000-0x0000000010030000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-09-13 18:01

Reported

2024-09-13 18:04

Platform

win10v2004-20240802-en

Max time kernel

149s

Max time network

152s

Command Line

"C:\Users\Admin\AppData\Local\Temp\e9e100d397b476b228f807585980dca30da30460fbd6423791a955567887ff1b.exe"

Signatures

Floxif, Floodfix

backdoor trojan floxif

Detects Floxif payload

backdoor
Description Indicator Process Target
N/A N/A N/A N/A

Event Triggered Execution: AppInit DLLs

persistence privilege_escalation

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
N/A N/A N/A N/A
N/A N/A N/A N/A

Enumerates connected drives

Description Indicator Process Target
File opened (read-only) \??\e: C:\Users\Admin\AppData\Local\Temp\e9e100d397b476b228f807585980dca30da30460fbd6423791a955567887ff1b.exe N/A

Drops file in Program Files directory

Description Indicator Process Target
File created C:\Program Files\Common Files\System\symsrv.dll C:\Users\Admin\AppData\Local\Temp\e9e100d397b476b228f807585980dca30da30460fbd6423791a955567887ff1b.exe N/A
File created \??\c:\program files\common files\system\symsrv.dll.000 C:\Users\Admin\AppData\Local\Temp\e9e100d397b476b228f807585980dca30da30460fbd6423791a955567887ff1b.exe N/A

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\e9e100d397b476b228f807585980dca30da30460fbd6423791a955567887ff1b.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\e9e100d397b476b228f807585980dca30da30460fbd6423791a955567887ff1b.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\e9e100d397b476b228f807585980dca30da30460fbd6423791a955567887ff1b.exe

"C:\Users\Admin\AppData\Local\Temp\e9e100d397b476b228f807585980dca30da30460fbd6423791a955567887ff1b.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 2892 -ip 2892

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2892 -s 836

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 13.86.106.20.in-addr.arpa udp
US 8.8.8.8:53 5isohu.com udp
US 8.8.8.8:53 www.aieov.com udp
US 173.255.194.134:80 www.aieov.com tcp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 8.8.8.8:53 75.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 134.194.255.173.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 133.211.185.52.in-addr.arpa udp
US 8.8.8.8:53 183.59.114.20.in-addr.arpa udp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
US 8.8.8.8:53 240.143.123.92.in-addr.arpa udp
US 8.8.8.8:53 25.140.123.92.in-addr.arpa udp
US 8.8.8.8:53 11.227.111.52.in-addr.arpa udp

Files

C:\Program Files\Common Files\System\symsrv.dll

MD5 7574cf2c64f35161ab1292e2f532aabf
SHA1 14ba3fa927a06224dfe587014299e834def4644f
SHA256 de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085
SHA512 4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab

memory/2892-4-0x0000000010000000-0x0000000010030000-memory.dmp

memory/2892-6-0x0000000000401000-0x0000000000402000-memory.dmp

memory/2892-7-0x0000000000400000-0x00000000008A5000-memory.dmp

memory/2892-17-0x0000000010000000-0x0000000010030000-memory.dmp