Malware Analysis Report

2024-11-13 17:41

Sample ID 241110-bycwrazjck
Target 71ddf7ae772de3bf133246ebc4319572b7e3b45e14f01e36d2aa790ea451a203
SHA256 71ddf7ae772de3bf133246ebc4319572b7e3b45e14f01e36d2aa790ea451a203
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

71ddf7ae772de3bf133246ebc4319572b7e3b45e14f01e36d2aa790ea451a203

Threat Level: Known bad

The file 71ddf7ae772de3bf133246ebc4319572b7e3b45e14f01e36d2aa790ea451a203 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

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

2024-11-10 01:32

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-11-10 01:32

Reported

2024-11-10 01:35

Platform

win7-20240903-en

Max time kernel

117s

Max time network

118s

Command Line

"C:\Users\Admin\AppData\Local\Temp\71ddf7ae772de3bf133246ebc4319572b7e3b45e14f01e36d2aa790ea451a203.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

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\71ddf7ae772de3bf133246ebc4319572b7e3b45e14f01e36d2aa790ea451a203.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\71ddf7ae772de3bf133246ebc4319572b7e3b45e14f01e36d2aa790ea451a203.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\71ddf7ae772de3bf133246ebc4319572b7e3b45e14f01e36d2aa790ea451a203.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\71ddf7ae772de3bf133246ebc4319572b7e3b45e14f01e36d2aa790ea451a203.exe

"C:\Users\Admin\AppData\Local\Temp\71ddf7ae772de3bf133246ebc4319572b7e3b45e14f01e36d2aa790ea451a203.exe"

Network

N/A

Files

memory/2940-0-0x0000000000A6B000-0x0000000000A6C000-memory.dmp

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

MD5 7574cf2c64f35161ab1292e2f532aabf
SHA1 14ba3fa927a06224dfe587014299e834def4644f
SHA256 de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085
SHA512 4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab

memory/2940-4-0x0000000010000000-0x0000000010030000-memory.dmp

memory/2940-6-0x0000000000A60000-0x0000000000A97000-memory.dmp

memory/2940-7-0x0000000010000000-0x0000000010030000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-11-10 01:32

Reported

2024-11-10 01:35

Platform

win10v2004-20241007-en

Max time kernel

94s

Max time network

146s

Command Line

"C:\Users\Admin\AppData\Local\Temp\71ddf7ae772de3bf133246ebc4319572b7e3b45e14f01e36d2aa790ea451a203.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

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\71ddf7ae772de3bf133246ebc4319572b7e3b45e14f01e36d2aa790ea451a203.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\71ddf7ae772de3bf133246ebc4319572b7e3b45e14f01e36d2aa790ea451a203.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\71ddf7ae772de3bf133246ebc4319572b7e3b45e14f01e36d2aa790ea451a203.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\71ddf7ae772de3bf133246ebc4319572b7e3b45e14f01e36d2aa790ea451a203.exe

"C:\Users\Admin\AppData\Local\Temp\71ddf7ae772de3bf133246ebc4319572b7e3b45e14f01e36d2aa790ea451a203.exe"

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 8.8.8.8:53 105.209.201.84.in-addr.arpa udp
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 97.17.167.52.in-addr.arpa udp
US 8.8.8.8:53 217.106.137.52.in-addr.arpa udp
US 8.8.8.8:53 200.163.202.172.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 8.8.8.8:53 48.229.111.52.in-addr.arpa udp

Files

memory/3588-0-0x0000000000FFB000-0x0000000000FFC000-memory.dmp

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

MD5 7574cf2c64f35161ab1292e2f532aabf
SHA1 14ba3fa927a06224dfe587014299e834def4644f
SHA256 de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085
SHA512 4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab

memory/3588-4-0x0000000010000000-0x0000000010030000-memory.dmp

memory/3588-6-0x0000000000FF0000-0x0000000001027000-memory.dmp

memory/3588-8-0x0000000010000000-0x0000000010030000-memory.dmp