Malware Analysis Report

2024-12-08 02:40

Sample ID 240913-tayseswcjm
Target f4b93bc88e6842602ccf7ee1a60a13f7b96232b9badd60852b285377d3e11775
SHA256 f4b93bc88e6842602ccf7ee1a60a13f7b96232b9badd60852b285377d3e11775
Tags
floxif backdoor discovery persistence privilege_escalation 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

f4b93bc88e6842602ccf7ee1a60a13f7b96232b9badd60852b285377d3e11775

Threat Level: Known bad

The file f4b93bc88e6842602ccf7ee1a60a13f7b96232b9badd60852b285377d3e11775 was found to be: Known bad.

Malicious Activity Summary

floxif backdoor discovery persistence privilege_escalation trojan upx

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

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-09-13 15:51

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-09-13 15:51

Reported

2024-09-13 15:54

Platform

win7-20240903-en

Max time kernel

119s

Max time network

120s

Command Line

"C:\Users\Admin\AppData\Local\Temp\f4b93bc88e6842602ccf7ee1a60a13f7b96232b9badd60852b285377d3e11775.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\f4b93bc88e6842602ccf7ee1a60a13f7b96232b9badd60852b285377d3e11775.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\f4b93bc88e6842602ccf7ee1a60a13f7b96232b9badd60852b285377d3e11775.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\f4b93bc88e6842602ccf7ee1a60a13f7b96232b9badd60852b285377d3e11775.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\f4b93bc88e6842602ccf7ee1a60a13f7b96232b9badd60852b285377d3e11775.exe

"C:\Users\Admin\AppData\Local\Temp\f4b93bc88e6842602ccf7ee1a60a13f7b96232b9badd60852b285377d3e11775.exe"

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/2692-5-0x0000000000200000-0x0000000000235000-memory.dmp

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

Analysis: behavioral2

Detonation Overview

Submitted

2024-09-13 15:51

Reported

2024-09-13 15:54

Platform

win10v2004-20240802-en

Max time kernel

94s

Max time network

96s

Command Line

"C:\Users\Admin\AppData\Local\Temp\f4b93bc88e6842602ccf7ee1a60a13f7b96232b9badd60852b285377d3e11775.exe"

Signatures

Processes

C:\Users\Admin\AppData\Local\Temp\f4b93bc88e6842602ccf7ee1a60a13f7b96232b9badd60852b285377d3e11775.exe

"C:\Users\Admin\AppData\Local\Temp\f4b93bc88e6842602ccf7ee1a60a13f7b96232b9badd60852b285377d3e11775.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 184 -p 3968 -ip 3968

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 3968 -s 140

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 8.8.8.8:53 240.143.123.92.in-addr.arpa udp
US 8.8.8.8:53 0.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 232.168.11.51.in-addr.arpa udp
US 8.8.8.8:53 103.169.127.40.in-addr.arpa udp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
US 8.8.8.8:53 18.134.221.88.in-addr.arpa udp
US 8.8.8.8:53 203.142.123.92.in-addr.arpa udp
US 8.8.8.8:53 43.229.111.52.in-addr.arpa udp

Files

N/A