Malware Analysis Report

2025-01-02 07:25

Sample ID 240914-fbkejaxbrm
Target a7f1b5285e5ff8ece2cf05da2aaae0c0N
SHA256 77fb0c2091d2d0a4184351dd36eadbc4f8c5e5ccb618de0e1a4e429603b71a61
Tags
floxif backdoor discovery 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

77fb0c2091d2d0a4184351dd36eadbc4f8c5e5ccb618de0e1a4e429603b71a61

Threat Level: Known bad

The file a7f1b5285e5ff8ece2cf05da2aaae0c0N was found to be: Known bad.

Malicious Activity Summary

floxif backdoor discovery trojan upx

Floxif, Floodfix

Detects Floxif payload

Loads dropped DLL

ACProtect 1.3x - 1.4x DLL software

UPX packed file

Enumerates connected drives

Drops file in Program Files directory

Unsigned PE

System Location Discovery: System Language Discovery

Checks processor information in registry

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-09-14 04:41

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-09-14 04:41

Reported

2024-09-14 04:43

Platform

win7-20240903-en

Max time kernel

119s

Max time network

120s

Command Line

"C:\Users\Admin\AppData\Local\Temp\a7f1b5285e5ff8ece2cf05da2aaae0c0N.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\a7f1b5285e5ff8ece2cf05da2aaae0c0N.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
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\a7f1b5285e5ff8ece2cf05da2aaae0c0N.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\a7f1b5285e5ff8ece2cf05da2aaae0c0N.exe N/A
File created \??\c:\program files\common files\system\symsrv.dll.000 C:\Users\Admin\AppData\Local\Temp\a7f1b5285e5ff8ece2cf05da2aaae0c0N.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\a7f1b5285e5ff8ece2cf05da2aaae0c0N.exe N/A

Checks processor information in registry

Description Indicator Process Target
Key opened \REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor C:\Users\Admin\AppData\Local\Temp\a7f1b5285e5ff8ece2cf05da2aaae0c0N.exe N/A
Key queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor C:\Users\Admin\AppData\Local\Temp\a7f1b5285e5ff8ece2cf05da2aaae0c0N.exe N/A
Key enumerated \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor C:\Users\Admin\AppData\Local\Temp\a7f1b5285e5ff8ece2cf05da2aaae0c0N.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\a7f1b5285e5ff8ece2cf05da2aaae0c0N.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\a7f1b5285e5ff8ece2cf05da2aaae0c0N.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\a7f1b5285e5ff8ece2cf05da2aaae0c0N.exe

"C:\Users\Admin\AppData\Local\Temp\a7f1b5285e5ff8ece2cf05da2aaae0c0N.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 72.14.178.174:80 www.aieov.com tcp
US 72.14.178.174:80 www.aieov.com tcp
US 72.14.178.174:80 www.aieov.com tcp
US 72.14.178.174:80 www.aieov.com tcp
US 72.14.178.174:80 www.aieov.com tcp
US 72.14.178.174:80 www.aieov.com tcp

Files

memory/1404-3-0x0000000010000000-0x0000000010030000-memory.dmp

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

MD5 7574cf2c64f35161ab1292e2f532aabf
SHA1 14ba3fa927a06224dfe587014299e834def4644f
SHA256 de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085
SHA512 4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab

memory/1404-10-0x0000000000400000-0x0000000000478000-memory.dmp

memory/1404-11-0x0000000010000000-0x0000000010030000-memory.dmp

memory/1404-15-0x0000000010000000-0x0000000010030000-memory.dmp

memory/1404-19-0x0000000010000000-0x0000000010030000-memory.dmp

memory/1404-23-0x0000000010000000-0x0000000010030000-memory.dmp

C:\Program Files\Common Files\System\symsrv.dll.000

MD5 1130c911bf5db4b8f7cf9b6f4b457623
SHA1 48e734c4bc1a8b5399bff4954e54b268bde9d54c
SHA256 eba08cc8182f379392a97f542b350ea0dbbe5e4009472f35af20e3d857eafdf1
SHA512 94e2511ef2c53494c2aff0960266491ffc0e54e75185427d1ccedae27c286992c754ca94cbb0c9ea36e3f04cd4eb7f032c551cf2d4b309f292906303f1a75fa0

memory/1404-27-0x0000000010000000-0x0000000010030000-memory.dmp

memory/1404-31-0x0000000010000000-0x0000000010030000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-09-14 04:41

Reported

2024-09-14 04:43

Platform

win10v2004-20240802-en

Max time kernel

116s

Max time network

96s

Command Line

"C:\Users\Admin\AppData\Local\Temp\a7f1b5285e5ff8ece2cf05da2aaae0c0N.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\a7f1b5285e5ff8ece2cf05da2aaae0c0N.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
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\a7f1b5285e5ff8ece2cf05da2aaae0c0N.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\a7f1b5285e5ff8ece2cf05da2aaae0c0N.exe N/A
File created \??\c:\program files\common files\system\symsrv.dll.000 C:\Users\Admin\AppData\Local\Temp\a7f1b5285e5ff8ece2cf05da2aaae0c0N.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\a7f1b5285e5ff8ece2cf05da2aaae0c0N.exe N/A

Checks processor information in registry

Description Indicator Process Target
Key opened \REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor C:\Users\Admin\AppData\Local\Temp\a7f1b5285e5ff8ece2cf05da2aaae0c0N.exe N/A
Key queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor C:\Users\Admin\AppData\Local\Temp\a7f1b5285e5ff8ece2cf05da2aaae0c0N.exe N/A
Key enumerated \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor C:\Users\Admin\AppData\Local\Temp\a7f1b5285e5ff8ece2cf05da2aaae0c0N.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\a7f1b5285e5ff8ece2cf05da2aaae0c0N.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\a7f1b5285e5ff8ece2cf05da2aaae0c0N.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\a7f1b5285e5ff8ece2cf05da2aaae0c0N.exe

"C:\Users\Admin\AppData\Local\Temp\a7f1b5285e5ff8ece2cf05da2aaae0c0N.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 5isohu.com udp
US 8.8.8.8:53 28.118.140.52.in-addr.arpa udp
US 8.8.8.8:53 136.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 25.140.123.92.in-addr.arpa udp
US 8.8.8.8:53 www.aieov.com udp
US 45.33.2.79:80 www.aieov.com tcp
US 8.8.8.8:53 79.2.33.45.in-addr.arpa udp
US 8.8.8.8:53 5isohu.com udp
US 45.33.2.79:80 www.aieov.com tcp
US 8.8.8.8:53 5isohu.com udp
US 45.33.2.79:80 www.aieov.com tcp
US 8.8.8.8:53 241.150.49.20.in-addr.arpa udp
US 45.33.2.79:80 www.aieov.com tcp
US 8.8.8.8:53 5isohu.com udp
US 45.33.2.79:80 www.aieov.com tcp
US 8.8.8.8:53 5isohu.com udp
US 45.33.2.79:80 www.aieov.com tcp
US 8.8.8.8:53 103.169.127.40.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.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/2296-4-0x0000000010000000-0x0000000010030000-memory.dmp

memory/2296-14-0x0000000010000000-0x0000000010030000-memory.dmp

memory/2296-13-0x0000000000400000-0x0000000000478000-memory.dmp

memory/2296-20-0x0000000010000000-0x0000000010030000-memory.dmp

C:\Program Files\Common Files\System\symsrv.dll.000

MD5 1130c911bf5db4b8f7cf9b6f4b457623
SHA1 48e734c4bc1a8b5399bff4954e54b268bde9d54c
SHA256 eba08cc8182f379392a97f542b350ea0dbbe5e4009472f35af20e3d857eafdf1
SHA512 94e2511ef2c53494c2aff0960266491ffc0e54e75185427d1ccedae27c286992c754ca94cbb0c9ea36e3f04cd4eb7f032c551cf2d4b309f292906303f1a75fa0

memory/2296-26-0x0000000010000000-0x0000000010030000-memory.dmp

memory/2296-38-0x0000000010000000-0x0000000010030000-memory.dmp