Malware Analysis Report

2024-12-08 02:47

Sample ID 240816-w75y4szdra
Target 211aa3b521e8d4a5eb1148c7c47752e002ddfe364aba3472606a7704634aaf9b
SHA256 211aa3b521e8d4a5eb1148c7c47752e002ddfe364aba3472606a7704634aaf9b
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

211aa3b521e8d4a5eb1148c7c47752e002ddfe364aba3472606a7704634aaf9b

Threat Level: Known bad

The file 211aa3b521e8d4a5eb1148c7c47752e002ddfe364aba3472606a7704634aaf9b 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

UPX packed file

ACProtect 1.3x - 1.4x DLL software

Loads dropped DLL

Enumerates connected drives

Drops file in Program Files directory

Enumerates physical storage devices

System Location Discovery: System Language Discovery

Suspicious behavior: EnumeratesProcesses

Suspicious use of SetWindowsHookEx

Suspicious use of AdjustPrivilegeToken

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-08-16 18:34

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-08-16 18:34

Reported

2024-08-16 18:37

Platform

win7-20240729-en

Max time kernel

120s

Max time network

121s

Command Line

"C:\Users\Admin\AppData\Local\Temp\211aa3b521e8d4a5eb1148c7c47752e002ddfe364aba3472606a7704634aaf9b.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

Enumerates connected drives

Description Indicator Process Target
File opened (read-only) \??\e: C:\Users\Admin\AppData\Local\Temp\211aa3b521e8d4a5eb1148c7c47752e002ddfe364aba3472606a7704634aaf9b.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\211aa3b521e8d4a5eb1148c7c47752e002ddfe364aba3472606a7704634aaf9b.exe N/A
File created \??\c:\program files\common files\system\symsrv.dll.000 C:\Users\Admin\AppData\Local\Temp\211aa3b521e8d4a5eb1148c7c47752e002ddfe364aba3472606a7704634aaf9b.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\211aa3b521e8d4a5eb1148c7c47752e002ddfe364aba3472606a7704634aaf9b.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\211aa3b521e8d4a5eb1148c7c47752e002ddfe364aba3472606a7704634aaf9b.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\211aa3b521e8d4a5eb1148c7c47752e002ddfe364aba3472606a7704634aaf9b.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\211aa3b521e8d4a5eb1148c7c47752e002ddfe364aba3472606a7704634aaf9b.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\211aa3b521e8d4a5eb1148c7c47752e002ddfe364aba3472606a7704634aaf9b.exe

"C:\Users\Admin\AppData\Local\Temp\211aa3b521e8d4a5eb1148c7c47752e002ddfe364aba3472606a7704634aaf9b.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 45.79.19.196:80 www.aieov.com tcp

Files

memory/1648-3-0x0000000010000000-0x0000000010030000-memory.dmp

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

MD5 7574cf2c64f35161ab1292e2f532aabf
SHA1 14ba3fa927a06224dfe587014299e834def4644f
SHA256 de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085
SHA512 4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab

memory/1648-12-0x0000000010000000-0x0000000010030000-memory.dmp

memory/1648-10-0x00000000002D0000-0x00000000006B0000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-08-16 18:34

Reported

2024-08-16 18:37

Platform

win10v2004-20240802-en

Max time kernel

134s

Max time network

123s

Command Line

"C:\Users\Admin\AppData\Local\Temp\211aa3b521e8d4a5eb1148c7c47752e002ddfe364aba3472606a7704634aaf9b.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\211aa3b521e8d4a5eb1148c7c47752e002ddfe364aba3472606a7704634aaf9b.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\211aa3b521e8d4a5eb1148c7c47752e002ddfe364aba3472606a7704634aaf9b.exe N/A
File created \??\c:\program files\common files\system\symsrv.dll.000 C:\Users\Admin\AppData\Local\Temp\211aa3b521e8d4a5eb1148c7c47752e002ddfe364aba3472606a7704634aaf9b.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\211aa3b521e8d4a5eb1148c7c47752e002ddfe364aba3472606a7704634aaf9b.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\211aa3b521e8d4a5eb1148c7c47752e002ddfe364aba3472606a7704634aaf9b.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\211aa3b521e8d4a5eb1148c7c47752e002ddfe364aba3472606a7704634aaf9b.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\211aa3b521e8d4a5eb1148c7c47752e002ddfe364aba3472606a7704634aaf9b.exe

"C:\Users\Admin\AppData\Local\Temp\211aa3b521e8d4a5eb1148c7c47752e002ddfe364aba3472606a7704634aaf9b.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 g.bing.com udp
US 13.107.21.237:443 g.bing.com tcp
US 8.8.8.8:53 81.144.22.2.in-addr.arpa udp
US 8.8.8.8:53 217.106.137.52.in-addr.arpa udp
US 8.8.8.8:53 5isohu.com udp
US 8.8.8.8:53 www.aieov.com udp
US 45.56.79.23:80 www.aieov.com tcp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 20.160.190.20.in-addr.arpa udp
US 8.8.8.8:53 237.21.107.13.in-addr.arpa udp
US 8.8.8.8:53 55.36.223.20.in-addr.arpa udp
US 8.8.8.8:53 23.79.56.45.in-addr.arpa udp
US 8.8.8.8:53 5isohu.com udp
US 45.56.79.23:80 www.aieov.com tcp
US 8.8.8.8:53 58.55.71.13.in-addr.arpa udp
US 8.8.8.8:53 86.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
IE 52.111.236.23:443 tcp
US 8.8.8.8:53 11.227.111.52.in-addr.arpa udp
US 8.8.8.8:53 43.58.199.20.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

Files

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

MD5 7574cf2c64f35161ab1292e2f532aabf
SHA1 14ba3fa927a06224dfe587014299e834def4644f
SHA256 de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085
SHA512 4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab

memory/1044-4-0x0000000010000000-0x0000000010030000-memory.dmp

memory/1044-15-0x0000000010000000-0x0000000010030000-memory.dmp

memory/1044-13-0x0000000000500000-0x00000000008E0000-memory.dmp