Malware Analysis Report

2025-01-02 07:24

Sample ID 240914-yxh3pstcmn
Target 35f08cd2e5b4ca5eec1379cbe721ef3ae22273a376be4c07e1ebbc06de17433d
SHA256 35f08cd2e5b4ca5eec1379cbe721ef3ae22273a376be4c07e1ebbc06de17433d
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

35f08cd2e5b4ca5eec1379cbe721ef3ae22273a376be4c07e1ebbc06de17433d

Threat Level: Known bad

The file 35f08cd2e5b4ca5eec1379cbe721ef3ae22273a376be4c07e1ebbc06de17433d 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

ACProtect 1.3x - 1.4x DLL software

Loads dropped DLL

UPX packed file

Enumerates connected drives

Drops file in Program Files directory

Unsigned PE

System Location Discovery: System Language Discovery

Enumerates physical storage devices

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-09-14 20:09

Signatures

Unsigned PE

Description Indicator Process Target
N/A N/A N/A N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-09-14 20:09

Reported

2024-09-14 20:12

Platform

win7-20240903-en

Max time kernel

121s

Max time network

121s

Command Line

"C:\Users\Admin\AppData\Local\Temp\35f08cd2e5b4ca5eec1379cbe721ef3ae22273a376be4c07e1ebbc06de17433d.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

Enumerates connected drives

Description Indicator Process Target
File opened (read-only) \??\e: C:\Users\Admin\AppData\Local\Temp\35f08cd2e5b4ca5eec1379cbe721ef3ae22273a376be4c07e1ebbc06de17433d.exe 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\35f08cd2e5b4ca5eec1379cbe721ef3ae22273a376be4c07e1ebbc06de17433d.exe N/A
File created \??\c:\program files\common files\system\symsrv.dll.000 C:\Users\Admin\AppData\Local\Temp\35f08cd2e5b4ca5eec1379cbe721ef3ae22273a376be4c07e1ebbc06de17433d.exe N/A

Enumerates physical storage devices

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\35f08cd2e5b4ca5eec1379cbe721ef3ae22273a376be4c07e1ebbc06de17433d.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\35f08cd2e5b4ca5eec1379cbe721ef3ae22273a376be4c07e1ebbc06de17433d.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\35f08cd2e5b4ca5eec1379cbe721ef3ae22273a376be4c07e1ebbc06de17433d.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\35f08cd2e5b4ca5eec1379cbe721ef3ae22273a376be4c07e1ebbc06de17433d.exe

"C:\Users\Admin\AppData\Local\Temp\35f08cd2e5b4ca5eec1379cbe721ef3ae22273a376be4c07e1ebbc06de17433d.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 5isohu.com udp
US 8.8.8.8:53 www.aieov.com udp
US 173.255.194.134:80 www.aieov.com tcp

Files

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

MD5 7574cf2c64f35161ab1292e2f532aabf
SHA1 14ba3fa927a06224dfe587014299e834def4644f
SHA256 de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085
SHA512 4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab

memory/2368-3-0x0000000010000000-0x0000000010030000-memory.dmp

memory/2368-5-0x0000000000403000-0x0000000000406000-memory.dmp

memory/2368-11-0x0000000000400000-0x0000000000414000-memory.dmp

memory/2368-13-0x0000000010000000-0x0000000010030000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-09-14 20:09

Reported

2024-09-14 20:12

Platform

win10v2004-20240802-en

Max time kernel

94s

Max time network

138s

Command Line

"C:\Users\Admin\AppData\Local\Temp\35f08cd2e5b4ca5eec1379cbe721ef3ae22273a376be4c07e1ebbc06de17433d.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

Enumerates connected drives

Description Indicator Process Target
File opened (read-only) \??\e: C:\Users\Admin\AppData\Local\Temp\35f08cd2e5b4ca5eec1379cbe721ef3ae22273a376be4c07e1ebbc06de17433d.exe 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\35f08cd2e5b4ca5eec1379cbe721ef3ae22273a376be4c07e1ebbc06de17433d.exe N/A
File created \??\c:\program files\common files\system\symsrv.dll.000 C:\Users\Admin\AppData\Local\Temp\35f08cd2e5b4ca5eec1379cbe721ef3ae22273a376be4c07e1ebbc06de17433d.exe N/A

Enumerates physical storage devices

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\35f08cd2e5b4ca5eec1379cbe721ef3ae22273a376be4c07e1ebbc06de17433d.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\35f08cd2e5b4ca5eec1379cbe721ef3ae22273a376be4c07e1ebbc06de17433d.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\35f08cd2e5b4ca5eec1379cbe721ef3ae22273a376be4c07e1ebbc06de17433d.exe

"C:\Users\Admin\AppData\Local\Temp\35f08cd2e5b4ca5eec1379cbe721ef3ae22273a376be4c07e1ebbc06de17433d.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 5isohu.com udp
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 133.211.185.52.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 www.aieov.com udp
US 45.79.19.196:80 www.aieov.com tcp
US 8.8.8.8:53 134.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 196.19.79.45.in-addr.arpa udp
US 8.8.8.8:53 5isohu.com udp
US 45.79.19.196:80 www.aieov.com tcp
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 8.8.8.8:53 217.135.221.88.in-addr.arpa udp
US 8.8.8.8:53 43.229.111.52.in-addr.arpa udp

Files

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

MD5 7574cf2c64f35161ab1292e2f532aabf
SHA1 14ba3fa927a06224dfe587014299e834def4644f
SHA256 de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085
SHA512 4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab

memory/784-4-0x0000000010000000-0x0000000010030000-memory.dmp

memory/784-6-0x0000000000403000-0x0000000000406000-memory.dmp

memory/784-12-0x0000000000400000-0x0000000000414000-memory.dmp

memory/784-15-0x0000000000400000-0x0000000000414000-memory.dmp

memory/784-16-0x0000000010000000-0x0000000010030000-memory.dmp