Malware Analysis Report

2025-01-02 07:30

Sample ID 240815-w19zgs1dkn
Target 07cef758d4db33a0d56ce07a1ac461652a12422f4015be49e96858b2fc8e30e0
SHA256 07cef758d4db33a0d56ce07a1ac461652a12422f4015be49e96858b2fc8e30e0
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

07cef758d4db33a0d56ce07a1ac461652a12422f4015be49e96858b2fc8e30e0

Threat Level: Known bad

The file 07cef758d4db33a0d56ce07a1ac461652a12422f4015be49e96858b2fc8e30e0 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

ACProtect 1.3x - 1.4x DLL software

UPX packed file

Drops file in Program Files directory

System Location Discovery: System Language Discovery

Program crash

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-08-15 18:24

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-08-15 18:24

Reported

2024-08-15 18:27

Platform

win7-20240708-en

Max time kernel

140s

Max time network

120s

Command Line

"C:\Users\Admin\AppData\Local\Temp\07cef758d4db33a0d56ce07a1ac461652a12422f4015be49e96858b2fc8e30e0.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\07cef758d4db33a0d56ce07a1ac461652a12422f4015be49e96858b2fc8e30e0.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\07cef758d4db33a0d56ce07a1ac461652a12422f4015be49e96858b2fc8e30e0.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\07cef758d4db33a0d56ce07a1ac461652a12422f4015be49e96858b2fc8e30e0.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\07cef758d4db33a0d56ce07a1ac461652a12422f4015be49e96858b2fc8e30e0.exe

"C:\Users\Admin\AppData\Local\Temp\07cef758d4db33a0d56ce07a1ac461652a12422f4015be49e96858b2fc8e30e0.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2332 -s 196

Network

N/A

Files

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

MD5 7574cf2c64f35161ab1292e2f532aabf
SHA1 14ba3fa927a06224dfe587014299e834def4644f
SHA256 de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085
SHA512 4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab

memory/2332-3-0x0000000010000000-0x0000000010030000-memory.dmp

memory/2332-5-0x0000000001111000-0x0000000001112000-memory.dmp

memory/2332-6-0x0000000010000000-0x0000000010030000-memory.dmp

memory/2332-7-0x0000000001110000-0x00000000020FE000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-08-15 18:24

Reported

2024-08-15 18:27

Platform

win10v2004-20240802-en

Max time kernel

148s

Max time network

150s

Command Line

"C:\Users\Admin\AppData\Local\Temp\07cef758d4db33a0d56ce07a1ac461652a12422f4015be49e96858b2fc8e30e0.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

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\07cef758d4db33a0d56ce07a1ac461652a12422f4015be49e96858b2fc8e30e0.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\07cef758d4db33a0d56ce07a1ac461652a12422f4015be49e96858b2fc8e30e0.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\07cef758d4db33a0d56ce07a1ac461652a12422f4015be49e96858b2fc8e30e0.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\07cef758d4db33a0d56ce07a1ac461652a12422f4015be49e96858b2fc8e30e0.exe

"C:\Users\Admin\AppData\Local\Temp\07cef758d4db33a0d56ce07a1ac461652a12422f4015be49e96858b2fc8e30e0.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 3248 -ip 3248

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 3248 -s 360

Network

Country Destination Domain Proto
US 8.8.8.8:53 0.205.248.87.in-addr.arpa udp
US 8.8.8.8:53 209.205.72.20.in-addr.arpa udp
US 8.8.8.8:53 g.bing.com udp
US 13.107.21.237:443 g.bing.com tcp
US 8.8.8.8:53 68.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 237.21.107.13.in-addr.arpa udp
US 8.8.8.8:53 58.55.71.13.in-addr.arpa udp
US 8.8.8.8:53 86.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
US 8.8.8.8:53 40.140.123.92.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
US 52.111.229.43:443 tcp
US 8.8.8.8:53 30.243.111.52.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 55.36.223.20.in-addr.arpa udp

Files

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

MD5 7574cf2c64f35161ab1292e2f532aabf
SHA1 14ba3fa927a06224dfe587014299e834def4644f
SHA256 de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085
SHA512 4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab

memory/3248-2-0x0000000010000000-0x0000000010030000-memory.dmp

memory/3248-5-0x00000000003E3000-0x00000000003E4000-memory.dmp

memory/3248-7-0x00000000003E0000-0x00000000013CE000-memory.dmp

memory/3248-11-0x0000000010000000-0x0000000010030000-memory.dmp

memory/3248-12-0x00000000003E0000-0x00000000013CE000-memory.dmp