Malware Analysis Report

2024-12-08 02:41

Sample ID 240913-cq4j6sydjk
Target cbfe43ea728740ed3a54c93d3c481549f60a718588b3edc9c0037a22d7d22891
SHA256 cbfe43ea728740ed3a54c93d3c481549f60a718588b3edc9c0037a22d7d22891
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

cbfe43ea728740ed3a54c93d3c481549f60a718588b3edc9c0037a22d7d22891

Threat Level: Known bad

The file cbfe43ea728740ed3a54c93d3c481549f60a718588b3edc9c0037a22d7d22891 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

Loads dropped DLL

ACProtect 1.3x - 1.4x DLL software

Enumerates connected drives

Drops file in Program Files directory

System Location Discovery: System Language Discovery

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Suspicious use of SetWindowsHookEx

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-09-13 02:17

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-09-13 02:17

Reported

2024-09-13 02:20

Platform

win7-20240903-en

Max time kernel

145s

Max time network

123s

Command Line

"C:\Users\Admin\AppData\Local\Temp\cbfe43ea728740ed3a54c93d3c481549f60a718588b3edc9c0037a22d7d22891.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
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\cbfe43ea728740ed3a54c93d3c481549f60a718588b3edc9c0037a22d7d22891.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\cbfe43ea728740ed3a54c93d3c481549f60a718588b3edc9c0037a22d7d22891.exe N/A
File created \??\c:\program files\common files\system\symsrv.dll.000 C:\Users\Admin\AppData\Local\Temp\cbfe43ea728740ed3a54c93d3c481549f60a718588b3edc9c0037a22d7d22891.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\cbfe43ea728740ed3a54c93d3c481549f60a718588b3edc9c0037a22d7d22891.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\cbfe43ea728740ed3a54c93d3c481549f60a718588b3edc9c0037a22d7d22891.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\cbfe43ea728740ed3a54c93d3c481549f60a718588b3edc9c0037a22d7d22891.exe

"C:\Users\Admin\AppData\Local\Temp\cbfe43ea728740ed3a54c93d3c481549f60a718588b3edc9c0037a22d7d22891.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

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

MD5 7574cf2c64f35161ab1292e2f532aabf
SHA1 14ba3fa927a06224dfe587014299e834def4644f
SHA256 de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085
SHA512 4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab

memory/2124-3-0x0000000010000000-0x0000000010030000-memory.dmp

memory/2124-5-0x00000000004B3000-0x00000000004B7000-memory.dmp

memory/2124-11-0x0000000010000000-0x0000000010030000-memory.dmp

memory/2124-12-0x0000000010000000-0x0000000010030000-memory.dmp

memory/2124-13-0x0000000000400000-0x000000000061F000-memory.dmp

memory/2124-16-0x0000000010000000-0x0000000010030000-memory.dmp

memory/2124-19-0x0000000010000000-0x0000000010030000-memory.dmp

memory/2124-22-0x0000000010000000-0x0000000010030000-memory.dmp

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

MD5 1130c911bf5db4b8f7cf9b6f4b457623
SHA1 48e734c4bc1a8b5399bff4954e54b268bde9d54c
SHA256 eba08cc8182f379392a97f542b350ea0dbbe5e4009472f35af20e3d857eafdf1
SHA512 94e2511ef2c53494c2aff0960266491ffc0e54e75185427d1ccedae27c286992c754ca94cbb0c9ea36e3f04cd4eb7f032c551cf2d4b309f292906303f1a75fa0

memory/2124-25-0x0000000010000000-0x0000000010030000-memory.dmp

memory/2124-28-0x0000000010000000-0x0000000010030000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-09-13 02:17

Reported

2024-09-13 02:20

Platform

win10v2004-20240802-en

Max time kernel

146s

Max time network

147s

Command Line

"C:\Users\Admin\AppData\Local\Temp\cbfe43ea728740ed3a54c93d3c481549f60a718588b3edc9c0037a22d7d22891.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
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\cbfe43ea728740ed3a54c93d3c481549f60a718588b3edc9c0037a22d7d22891.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\cbfe43ea728740ed3a54c93d3c481549f60a718588b3edc9c0037a22d7d22891.exe N/A
File created \??\c:\program files\common files\system\symsrv.dll.000 C:\Users\Admin\AppData\Local\Temp\cbfe43ea728740ed3a54c93d3c481549f60a718588b3edc9c0037a22d7d22891.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\cbfe43ea728740ed3a54c93d3c481549f60a718588b3edc9c0037a22d7d22891.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\cbfe43ea728740ed3a54c93d3c481549f60a718588b3edc9c0037a22d7d22891.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\cbfe43ea728740ed3a54c93d3c481549f60a718588b3edc9c0037a22d7d22891.exe

"C:\Users\Admin\AppData\Local\Temp\cbfe43ea728740ed3a54c93d3c481549f60a718588b3edc9c0037a22d7d22891.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 196.249.167.52.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 8.8.8.8:53 68.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 5isohu.com udp
US 8.8.8.8:53 www.aieov.com udp
US 45.79.19.196:80 www.aieov.com tcp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 196.19.79.45.in-addr.arpa udp
US 45.79.19.196:80 www.aieov.com tcp
US 8.8.8.8:53 5isohu.com udp
US 45.79.19.196:80 www.aieov.com tcp
US 8.8.8.8:53 241.150.49.20.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 5isohu.com udp
US 45.79.19.196:80 www.aieov.com tcp
US 8.8.8.8:53 5isohu.com udp
US 45.79.19.196:80 www.aieov.com tcp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 8.8.8.8:53 107.12.20.2.in-addr.arpa udp
US 8.8.8.8:53 81.144.22.2.in-addr.arpa udp
US 8.8.8.8:53 48.229.111.52.in-addr.arpa udp
US 8.8.8.8:53 5isohu.com udp
US 45.79.19.196:80 www.aieov.com tcp

Files

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

MD5 7574cf2c64f35161ab1292e2f532aabf
SHA1 14ba3fa927a06224dfe587014299e834def4644f
SHA256 de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085
SHA512 4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab

memory/4652-3-0x0000000010000000-0x0000000010030000-memory.dmp

memory/4652-5-0x00000000004B3000-0x00000000004B7000-memory.dmp

memory/4652-11-0x0000000000400000-0x000000000061F000-memory.dmp

memory/4652-14-0x0000000010000000-0x0000000010030000-memory.dmp

memory/4652-20-0x0000000010000000-0x0000000010030000-memory.dmp

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

MD5 1130c911bf5db4b8f7cf9b6f4b457623
SHA1 48e734c4bc1a8b5399bff4954e54b268bde9d54c
SHA256 eba08cc8182f379392a97f542b350ea0dbbe5e4009472f35af20e3d857eafdf1
SHA512 94e2511ef2c53494c2aff0960266491ffc0e54e75185427d1ccedae27c286992c754ca94cbb0c9ea36e3f04cd4eb7f032c551cf2d4b309f292906303f1a75fa0

memory/4652-25-0x0000000010000000-0x0000000010030000-memory.dmp

memory/4652-31-0x0000000010000000-0x0000000010030000-memory.dmp