Malware Analysis Report

2024-11-13 20:02

Sample ID 240909-1f8cdatcmd
Target f91bb3e7502844b6cf5f4310e30781b98f1561d6d9f680852a11d5dbb8b6e724
SHA256 f91bb3e7502844b6cf5f4310e30781b98f1561d6d9f680852a11d5dbb8b6e724
Tags
floxif backdoor discovery trojan upx
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

f91bb3e7502844b6cf5f4310e30781b98f1561d6d9f680852a11d5dbb8b6e724

Threat Level: Known bad

The file f91bb3e7502844b6cf5f4310e30781b98f1561d6d9f680852a11d5dbb8b6e724 was found to be: Known bad.

Malicious Activity Summary

floxif backdoor discovery trojan upx

Floxif, Floodfix

Detects Floxif payload

ACProtect 1.3x - 1.4x DLL software

Loads dropped DLL

UPX packed file

Drops file in Program Files directory

System Location Discovery: System Language Discovery

Program crash

Suspicious use of AdjustPrivilegeToken

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-09-09 21:36

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-09-09 21:36

Reported

2024-09-09 21:39

Platform

win7-20240903-en

Max time kernel

119s

Max time network

120s

Command Line

"C:\Users\Admin\AppData\Local\Temp\f91bb3e7502844b6cf5f4310e30781b98f1561d6d9f680852a11d5dbb8b6e724.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\f91bb3e7502844b6cf5f4310e30781b98f1561d6d9f680852a11d5dbb8b6e724.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\f91bb3e7502844b6cf5f4310e30781b98f1561d6d9f680852a11d5dbb8b6e724.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\f91bb3e7502844b6cf5f4310e30781b98f1561d6d9f680852a11d5dbb8b6e724.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\f91bb3e7502844b6cf5f4310e30781b98f1561d6d9f680852a11d5dbb8b6e724.exe

"C:\Users\Admin\AppData\Local\Temp\f91bb3e7502844b6cf5f4310e30781b98f1561d6d9f680852a11d5dbb8b6e724.exe"

Network

N/A

Files

memory/2980-0-0x0000000000D3B000-0x0000000000D3C000-memory.dmp

memory/2980-4-0x0000000010000000-0x0000000010030000-memory.dmp

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

MD5 7574cf2c64f35161ab1292e2f532aabf
SHA1 14ba3fa927a06224dfe587014299e834def4644f
SHA256 de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085
SHA512 4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab

memory/2980-7-0x0000000010000000-0x0000000010030000-memory.dmp

memory/2980-6-0x0000000000D30000-0x0000000000D65000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-09-09 21:36

Reported

2024-09-09 21:39

Platform

win10v2004-20240802-en

Max time kernel

95s

Max time network

143s

Command Line

"C:\Users\Admin\AppData\Local\Temp\f91bb3e7502844b6cf5f4310e30781b98f1561d6d9f680852a11d5dbb8b6e724.exe"

Signatures

Processes

C:\Users\Admin\AppData\Local\Temp\f91bb3e7502844b6cf5f4310e30781b98f1561d6d9f680852a11d5dbb8b6e724.exe

"C:\Users\Admin\AppData\Local\Temp\f91bb3e7502844b6cf5f4310e30781b98f1561d6d9f680852a11d5dbb8b6e724.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4648 -ip 4648

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 4648 -s 180

Network

Country Destination Domain Proto
US 8.8.8.8:53 217.106.137.52.in-addr.arpa udp
US 8.8.8.8:53 240.143.123.92.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 86.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 73.190.18.2.in-addr.arpa udp
US 8.8.8.8:53 19.229.111.52.in-addr.arpa udp

Files

N/A