Malware Analysis Report

2025-01-02 07:30

Sample ID 240815-2rmeqavajl
Target d872fbdee096311f1d7f0a4d24d3b590N.exe
SHA256 697ca11bac37b123e7dc966e807d6314bd2abc44ed2f1d15fbb17265e387b534
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

697ca11bac37b123e7dc966e807d6314bd2abc44ed2f1d15fbb17265e387b534

Threat Level: Known bad

The file d872fbdee096311f1d7f0a4d24d3b590N.exe 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

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

Suspicious use of AdjustPrivilegeToken

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-08-15 22:49

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-08-15 22:49

Reported

2024-08-15 22:51

Platform

win7-20240704-en

Max time kernel

22s

Max time network

17s

Command Line

"C:\Users\Admin\AppData\Local\Temp\d872fbdee096311f1d7f0a4d24d3b590N.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

Loads dropped DLL

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\d872fbdee096311f1d7f0a4d24d3b590N.exe 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\d872fbdee096311f1d7f0a4d24d3b590N.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\d872fbdee096311f1d7f0a4d24d3b590N.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\d872fbdee096311f1d7f0a4d24d3b590N.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\d872fbdee096311f1d7f0a4d24d3b590N.exe

"C:\Users\Admin\AppData\Local\Temp\d872fbdee096311f1d7f0a4d24d3b590N.exe"

Network

N/A

Files

memory/2436-3-0x0000000010000000-0x0000000010030000-memory.dmp

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

MD5 7574cf2c64f35161ab1292e2f532aabf
SHA1 14ba3fa927a06224dfe587014299e834def4644f
SHA256 de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085
SHA512 4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab

memory/2436-7-0x0000000010000000-0x0000000010030000-memory.dmp

memory/2436-5-0x0000000000FC0000-0x000000000100A000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-08-15 22:49

Reported

2024-08-15 22:51

Platform

win10v2004-20240802-en

Max time kernel

114s

Max time network

120s

Command Line

"C:\Users\Admin\AppData\Local\Temp\d872fbdee096311f1d7f0a4d24d3b590N.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

Loads dropped DLL

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\d872fbdee096311f1d7f0a4d24d3b590N.exe 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\d872fbdee096311f1d7f0a4d24d3b590N.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\d872fbdee096311f1d7f0a4d24d3b590N.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\d872fbdee096311f1d7f0a4d24d3b590N.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\d872fbdee096311f1d7f0a4d24d3b590N.exe

"C:\Users\Admin\AppData\Local\Temp\d872fbdee096311f1d7f0a4d24d3b590N.exe"

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=4412,i,1602949858158667699,12464335823361976127,262144 --variations-seed-version --mojo-platform-channel-handle=4448 /prefetch:8

Network

Country Destination Domain Proto
US 8.8.8.8:53 g.bing.com udp
US 204.79.197.237:443 g.bing.com tcp
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 196.249.167.52.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 74.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 237.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 209.205.72.20.in-addr.arpa udp
US 8.8.8.8:53 58.55.71.13.in-addr.arpa udp
US 8.8.8.8:53 26.165.165.52.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 48.229.111.52.in-addr.arpa udp
US 8.8.8.8:53 240.143.123.92.in-addr.arpa udp
US 8.8.8.8:53 88.156.103.20.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 205.47.74.20.in-addr.arpa udp

Files

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

MD5 7574cf2c64f35161ab1292e2f532aabf
SHA1 14ba3fa927a06224dfe587014299e834def4644f
SHA256 de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085
SHA512 4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab

memory/4888-3-0x0000000010000000-0x0000000010030000-memory.dmp

memory/4888-5-0x0000000000110000-0x000000000015A000-memory.dmp

memory/4888-6-0x0000000010000000-0x0000000010030000-memory.dmp