Malware Analysis Report

2025-04-03 16:37

Sample ID 241110-lzervavdmh
Target 93f1f2b51816707e163575d93c2e5b153162846ee029c039428726485b744ad8N
SHA256 93f1f2b51816707e163575d93c2e5b153162846ee029c039428726485b744ad8
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

93f1f2b51816707e163575d93c2e5b153162846ee029c039428726485b744ad8

Threat Level: Known bad

The file 93f1f2b51816707e163575d93c2e5b153162846ee029c039428726485b744ad8N was found to be: Known bad.

Malicious Activity Summary

floxif backdoor discovery persistence privilege_escalation trojan upx

Floxif family

Floxif, Floodfix

Detects Floxif payload

Event Triggered Execution: AppInit DLLs

Executes dropped EXE

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

Enumerates physical storage devices

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-11-10 09:57

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-11-10 09:57

Reported

2024-11-10 10:00

Platform

win7-20240903-en

Max time kernel

118s

Max time network

126s

Command Line

"C:\Users\Admin\AppData\Local\Temp\93f1f2b51816707e163575d93c2e5b153162846ee029c039428726485b744ad8N.exe"

Signatures

Floxif family

floxif

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

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\~nsuA.tmp\Un_A.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
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\93f1f2b51816707e163575d93c2e5b153162846ee029c039428726485b744ad8N.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\~nsuA.tmp\Un_A.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\93f1f2b51816707e163575d93c2e5b153162846ee029c039428726485b744ad8N.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\93f1f2b51816707e163575d93c2e5b153162846ee029c039428726485b744ad8N.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\~nsuA.tmp\Un_A.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\93f1f2b51816707e163575d93c2e5b153162846ee029c039428726485b744ad8N.exe

"C:\Users\Admin\AppData\Local\Temp\93f1f2b51816707e163575d93c2e5b153162846ee029c039428726485b744ad8N.exe"

C:\Users\Admin\AppData\Local\Temp\~nsuA.tmp\Un_A.exe

"C:\Users\Admin\AppData\Local\Temp\~nsuA.tmp\Un_A.exe" _?=C:\Users\Admin\AppData\Local\Temp\

Network

N/A

Files

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

MD5 7574cf2c64f35161ab1292e2f532aabf
SHA1 14ba3fa927a06224dfe587014299e834def4644f
SHA256 de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085
SHA512 4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab

memory/2160-1-0x0000000000403000-0x0000000000404000-memory.dmp

memory/2160-4-0x0000000010000000-0x0000000010030000-memory.dmp

memory/2160-6-0x0000000000400000-0x000000000043C000-memory.dmp

\Users\Admin\AppData\Local\Temp\~nsuA.tmp\Un_A.exe

MD5 6cdf0fa8aacec0821bbf7ac02b0727f0
SHA1 b7990313b88aa60e58dc60c7faf466b9cde3baf2
SHA256 93f1f2b51816707e163575d93c2e5b153162846ee029c039428726485b744ad8
SHA512 d1cbec6bd543225c12b2aa97b10bbaece14c4e197cd010f76c99195049845838b408b311ee74339684f7d383b938e23e88f5e9006392e9832f2db235fa9f23ae

memory/2160-17-0x0000000000400000-0x000000000043C000-memory.dmp

memory/2160-16-0x0000000010000000-0x0000000010030000-memory.dmp

memory/2264-21-0x0000000000400000-0x000000000043C000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\A1D26E2\AF1415C870.tmp

MD5 208be733871aad891a52c09cedfad665
SHA1 e008246b72de9c9728d3615ad5ea46c3dc3d76b9
SHA256 b1b284f02cbc9b04aef5659d77ea07c113e7d8b5780167cae6402b1069dad101
SHA512 eab01050c569332d2d836459ae92246d7df3d6f8af757c6190ef0f191afc84906f06eaebfef0ca40ca747c4cd3de76b3f209ad369a8a982fd278aac5f216df2b

memory/2264-22-0x0000000010000000-0x0000000010030000-memory.dmp

memory/2264-27-0x0000000010000000-0x0000000010030000-memory.dmp

memory/2264-28-0x0000000000400000-0x000000000043C000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-11-10 09:57

Reported

2024-11-10 10:00

Platform

win10v2004-20241007-en

Max time kernel

92s

Max time network

95s

Command Line

"C:\Users\Admin\AppData\Local\Temp\93f1f2b51816707e163575d93c2e5b153162846ee029c039428726485b744ad8N.exe"

Signatures

Floxif family

floxif

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

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\~nsuA.tmp\Un_A.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\93f1f2b51816707e163575d93c2e5b153162846ee029c039428726485b744ad8N.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\93f1f2b51816707e163575d93c2e5b153162846ee029c039428726485b744ad8N.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\~nsuA.tmp\Un_A.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\93f1f2b51816707e163575d93c2e5b153162846ee029c039428726485b744ad8N.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\93f1f2b51816707e163575d93c2e5b153162846ee029c039428726485b744ad8N.exe

"C:\Users\Admin\AppData\Local\Temp\93f1f2b51816707e163575d93c2e5b153162846ee029c039428726485b744ad8N.exe"

C:\Users\Admin\AppData\Local\Temp\~nsuA.tmp\Un_A.exe

"C:\Users\Admin\AppData\Local\Temp\~nsuA.tmp\Un_A.exe" _?=C:\Users\Admin\AppData\Local\Temp\

Network

Country Destination Domain Proto
US 8.8.8.8:53 217.106.137.52.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 200.163.202.172.in-addr.arpa udp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp
US 8.8.8.8:53 48.229.111.52.in-addr.arpa udp

Files

memory/4244-1-0x0000000000403000-0x0000000000404000-memory.dmp

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

MD5 7574cf2c64f35161ab1292e2f532aabf
SHA1 14ba3fa927a06224dfe587014299e834def4644f
SHA256 de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085
SHA512 4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab

memory/4244-4-0x0000000010000000-0x0000000010030000-memory.dmp

memory/4244-6-0x0000000000400000-0x000000000043C000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\A1D26E2\D73611EC1094.tmp

MD5 208be733871aad891a52c09cedfad665
SHA1 e008246b72de9c9728d3615ad5ea46c3dc3d76b9
SHA256 b1b284f02cbc9b04aef5659d77ea07c113e7d8b5780167cae6402b1069dad101
SHA512 eab01050c569332d2d836459ae92246d7df3d6f8af757c6190ef0f191afc84906f06eaebfef0ca40ca747c4cd3de76b3f209ad369a8a982fd278aac5f216df2b

memory/4244-18-0x0000000000400000-0x000000000043C000-memory.dmp

memory/4244-17-0x0000000010000000-0x0000000010030000-memory.dmp