Malware Analysis Report

2025-01-02 07:24

Sample ID 240915-d6t64stfla
Target 2024-09-15_9969a56a674553b6e69beed6f6dff521_avoslocker_cobalt-strike_floxif
SHA256 7b0170e43cae7800348df79ca10f39aba701362f67fb54c6069828a6a8abb43c
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

7b0170e43cae7800348df79ca10f39aba701362f67fb54c6069828a6a8abb43c

Threat Level: Known bad

The file 2024-09-15_9969a56a674553b6e69beed6f6dff521_avoslocker_cobalt-strike_floxif was found to be: Known bad.

Malicious Activity Summary

floxif backdoor discovery trojan upx

Floxif, Floodfix

Detects Floxif payload

Loads dropped DLL

UPX packed file

ACProtect 1.3x - 1.4x DLL software

Enumerates connected drives

Drops file in Program Files directory

System Location Discovery: System Language Discovery

Unsigned PE

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-09-15 03:37

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-09-15 03:37

Reported

2024-09-15 03:40

Platform

win7-20240903-en

Max time kernel

122s

Max time network

125s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-09-15_9969a56a674553b6e69beed6f6dff521_avoslocker_cobalt-strike_floxif.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\2024-09-15_9969a56a674553b6e69beed6f6dff521_avoslocker_cobalt-strike_floxif.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\2024-09-15_9969a56a674553b6e69beed6f6dff521_avoslocker_cobalt-strike_floxif.exe N/A
File created \??\c:\program files\common files\system\symsrv.dll.000 C:\Users\Admin\AppData\Local\Temp\2024-09-15_9969a56a674553b6e69beed6f6dff521_avoslocker_cobalt-strike_floxif.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\2024-09-15_9969a56a674553b6e69beed6f6dff521_avoslocker_cobalt-strike_floxif.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\2024-09-15_9969a56a674553b6e69beed6f6dff521_avoslocker_cobalt-strike_floxif.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\2024-09-15_9969a56a674553b6e69beed6f6dff521_avoslocker_cobalt-strike_floxif.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\2024-09-15_9969a56a674553b6e69beed6f6dff521_avoslocker_cobalt-strike_floxif.exe

"C:\Users\Admin\AppData\Local\Temp\2024-09-15_9969a56a674553b6e69beed6f6dff521_avoslocker_cobalt-strike_floxif.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 72.14.185.43:80 www.aieov.com tcp

Files

memory/1732-3-0x0000000010000000-0x0000000010030000-memory.dmp

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

MD5 7574cf2c64f35161ab1292e2f532aabf
SHA1 14ba3fa927a06224dfe587014299e834def4644f
SHA256 de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085
SHA512 4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab

C:\Users\Admin\AppData\Local\Temp\log.txt

MD5 e6ed128e5f605fb4f32f9464b1ccb258
SHA1 28879c1b58c9d92dc65b4c6fdc200f46730e5184
SHA256 e2dfba335de19d8ac78e685d47fbbbec23d420f6d1381c524ae49b3330fdb735
SHA512 37913ef6946e3ef25dc631b148569fb7178e8b394b57ece658ee3280af912a0079bc660052c32c6d2f058e22c2657d9801d9cd32b4a26df672008c55ee8bac43

memory/1732-61-0x0000000000DC0000-0x0000000000E5A000-memory.dmp

memory/1732-63-0x0000000010000000-0x0000000010030000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-09-15 03:37

Reported

2024-09-15 03:40

Platform

win10v2004-20240802-en

Max time kernel

95s

Max time network

154s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-09-15_9969a56a674553b6e69beed6f6dff521_avoslocker_cobalt-strike_floxif.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\2024-09-15_9969a56a674553b6e69beed6f6dff521_avoslocker_cobalt-strike_floxif.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\2024-09-15_9969a56a674553b6e69beed6f6dff521_avoslocker_cobalt-strike_floxif.exe N/A
File created \??\c:\program files\common files\system\symsrv.dll.000 C:\Users\Admin\AppData\Local\Temp\2024-09-15_9969a56a674553b6e69beed6f6dff521_avoslocker_cobalt-strike_floxif.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\2024-09-15_9969a56a674553b6e69beed6f6dff521_avoslocker_cobalt-strike_floxif.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\2024-09-15_9969a56a674553b6e69beed6f6dff521_avoslocker_cobalt-strike_floxif.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\2024-09-15_9969a56a674553b6e69beed6f6dff521_avoslocker_cobalt-strike_floxif.exe

"C:\Users\Admin\AppData\Local\Temp\2024-09-15_9969a56a674553b6e69beed6f6dff521_avoslocker_cobalt-strike_floxif.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 209.205.72.20.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 8.8.8.8:53 5isohu.com udp
US 8.8.8.8:53 www.aieov.com udp
US 45.33.18.44:80 www.aieov.com tcp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 44.18.33.45.in-addr.arpa udp
US 45.33.18.44:80 www.aieov.com tcp
US 8.8.8.8:53 5isohu.com udp
US 8.8.8.8:53 154.239.44.20.in-addr.arpa udp
US 8.8.8.8:53 103.169.127.40.in-addr.arpa udp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
US 8.8.8.8:53 19.229.111.52.in-addr.arpa udp

Files

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

MD5 7574cf2c64f35161ab1292e2f532aabf
SHA1 14ba3fa927a06224dfe587014299e834def4644f
SHA256 de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085
SHA512 4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab

memory/1600-2-0x0000000010000000-0x0000000010030000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\log.txt

MD5 276ebe1529126fcaa33fb297ea1e9ee2
SHA1 3c6c901d9dc90ecd3044917c7ecf585ce3bc2e52
SHA256 5e35c715b3f3ec95f9563221db17311a98c1c3045e1bf2463a67485b07f7c38e
SHA512 1964ae1718e76f6381d06e972743ed74eb981c7931618ec48f8082a0840fd4008891dc5056790cdf4aa6640df7a3980bba58a9933e9990658d0878fcdfaed965

memory/1600-63-0x0000000000D50000-0x0000000000DEA000-memory.dmp

memory/1600-65-0x0000000010000000-0x0000000010030000-memory.dmp