Malware Analysis Report

2024-12-08 02:37

Sample ID 240913-sfy5psvfqb
Target ac5a457813a6b2f6f5e95399edeb50baad802763aaf7d01b16fa49b3e7c9c83f
SHA256 ac5a457813a6b2f6f5e95399edeb50baad802763aaf7d01b16fa49b3e7c9c83f
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

ac5a457813a6b2f6f5e95399edeb50baad802763aaf7d01b16fa49b3e7c9c83f

Threat Level: Known bad

The file ac5a457813a6b2f6f5e95399edeb50baad802763aaf7d01b16fa49b3e7c9c83f 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

UPX packed file

ACProtect 1.3x - 1.4x DLL software

Loads dropped DLL

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 15:04

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-09-13 15:04

Reported

2024-09-13 15:07

Platform

win7-20240903-en

Max time kernel

120s

Max time network

125s

Command Line

"C:\Users\Admin\AppData\Local\Temp\ac5a457813a6b2f6f5e95399edeb50baad802763aaf7d01b16fa49b3e7c9c83f.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\ac5a457813a6b2f6f5e95399edeb50baad802763aaf7d01b16fa49b3e7c9c83f.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\ac5a457813a6b2f6f5e95399edeb50baad802763aaf7d01b16fa49b3e7c9c83f.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\ac5a457813a6b2f6f5e95399edeb50baad802763aaf7d01b16fa49b3e7c9c83f.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\ac5a457813a6b2f6f5e95399edeb50baad802763aaf7d01b16fa49b3e7c9c83f.exe

"C:\Users\Admin\AppData\Local\Temp\ac5a457813a6b2f6f5e95399edeb50baad802763aaf7d01b16fa49b3e7c9c83f.exe"

Network

N/A

Files

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

MD5 7574cf2c64f35161ab1292e2f532aabf
SHA1 14ba3fa927a06224dfe587014299e834def4644f
SHA256 de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085
SHA512 4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab

memory/2440-3-0x0000000010000000-0x0000000010030000-memory.dmp

memory/2440-5-0x0000000000D00000-0x0000000000D35000-memory.dmp

memory/2440-7-0x0000000010000000-0x0000000010030000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-09-13 15:04

Reported

2024-09-13 15:07

Platform

win10v2004-20240802-en

Max time kernel

125s

Max time network

128s

Command Line

"C:\Users\Admin\AppData\Local\Temp\ac5a457813a6b2f6f5e95399edeb50baad802763aaf7d01b16fa49b3e7c9c83f.exe"

Signatures

Processes

C:\Users\Admin\AppData\Local\Temp\ac5a457813a6b2f6f5e95399edeb50baad802763aaf7d01b16fa49b3e7c9c83f.exe

"C:\Users\Admin\AppData\Local\Temp\ac5a457813a6b2f6f5e95399edeb50baad802763aaf7d01b16fa49b3e7c9c83f.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3720 -ip 3720

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 3720 -s 180

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe

"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --field-trial-handle=3932,i,4356837537417149674,16553092232944545509,262144 --variations-seed-version --mojo-platform-channel-handle=4100 /prefetch:8

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 228.249.119.40.in-addr.arpa udp
US 8.8.8.8:53 0.205.248.87.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 133.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 217.106.137.52.in-addr.arpa udp
US 8.8.8.8:53 26.165.165.52.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
US 8.8.8.8:53 19.229.111.52.in-addr.arpa udp
US 8.8.8.8:53 81.144.22.2.in-addr.arpa udp
US 8.8.8.8:53 169.253.116.51.in-addr.arpa udp

Files

N/A