Malware Analysis Report

2025-01-02 07:21

Sample ID 240916-axbrmazele
Target 2024-09-16_504f6b94159653a22d8ca825867d34ac_avoslocker_cobalt-strike_floxif
SHA256 c752543b00c8e06ef4226e0867ba9614d8ea7496b344e5d81d3fcf99b1b80568
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: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

c752543b00c8e06ef4226e0867ba9614d8ea7496b344e5d81d3fcf99b1b80568

Threat Level: Known bad

The file 2024-09-16_504f6b94159653a22d8ca825867d34ac_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

Unsigned PE

System Location Discovery: System Language Discovery

Suspicious use of AdjustPrivilegeToken

Suspicious behavior: EnumeratesProcesses

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-09-16 00:35

Signatures

Unsigned PE

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

Analysis: behavioral2

Detonation Overview

Submitted

2024-09-16 00:35

Reported

2024-09-16 00:37

Platform

win10v2004-20240802-en

Max time kernel

93s

Max time network

150s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-09-16_504f6b94159653a22d8ca825867d34ac_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\2024-09-16_504f6b94159653a22d8ca825867d34ac_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\2024-09-16_504f6b94159653a22d8ca825867d34ac_avoslocker_cobalt-strike_floxif.exe N/A
File created \??\c:\program files\common files\system\symsrv.dll.000 C:\Users\Admin\AppData\Local\Temp\2024-09-16_504f6b94159653a22d8ca825867d34ac_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\2024-09-16_504f6b94159653a22d8ca825867d34ac_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\2024-09-16_504f6b94159653a22d8ca825867d34ac_avoslocker_cobalt-strike_floxif.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\2024-09-16_504f6b94159653a22d8ca825867d34ac_avoslocker_cobalt-strike_floxif.exe

"C:\Users\Admin\AppData\Local\Temp\2024-09-16_504f6b94159653a22d8ca825867d34ac_avoslocker_cobalt-strike_floxif.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 5isohu.com udp
US 8.8.8.8:53 209.205.72.20.in-addr.arpa udp
US 8.8.8.8:53 www.aieov.com udp
US 45.33.20.235:80 www.aieov.com tcp
US 8.8.8.8:53 44.56.20.217.in-addr.arpa udp
US 8.8.8.8:53 74.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 235.20.33.45.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 45.33.20.235:80 www.aieov.com tcp
US 8.8.8.8:53 5isohu.com udp
US 8.8.8.8:53 228.249.119.40.in-addr.arpa udp
US 8.8.8.8:53 58.55.71.13.in-addr.arpa udp
US 8.8.8.8:53 183.59.114.20.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 217.135.221.88.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
NL 52.111.243.31:443 tcp
US 8.8.8.8:53 30.243.111.52.in-addr.arpa udp

Files

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

MD5 7574cf2c64f35161ab1292e2f532aabf
SHA1 14ba3fa927a06224dfe587014299e834def4644f
SHA256 de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085
SHA512 4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab

memory/4820-2-0x0000000010000000-0x0000000010030000-memory.dmp

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

MD5 6b4bb6a990b676895613fdeaf7ffb4de
SHA1 7f47de21d72cf37a17418be072230abcda387d96
SHA256 e4d8ff415ebdb955d747433861073fea61a0b976dd7705840881d201f1eec7ba
SHA512 917ac841e752ed62f60af3da157ee152b8730bd0635d5bcaf3bf813694fd4221dab6d09d1285a6d8fcf9c79d580183cf4ebd32ef530b78fc5bcfaf2a0f51f300

memory/4820-63-0x0000000000220000-0x00000000002BA000-memory.dmp

memory/4820-65-0x0000000010000000-0x0000000010030000-memory.dmp

Analysis: behavioral1

Detonation Overview

Submitted

2024-09-16 00:35

Reported

2024-09-16 00:37

Platform

win7-20240903-en

Max time kernel

122s

Max time network

127s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-09-16_504f6b94159653a22d8ca825867d34ac_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\2024-09-16_504f6b94159653a22d8ca825867d34ac_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\2024-09-16_504f6b94159653a22d8ca825867d34ac_avoslocker_cobalt-strike_floxif.exe N/A
File created \??\c:\program files\common files\system\symsrv.dll.000 C:\Users\Admin\AppData\Local\Temp\2024-09-16_504f6b94159653a22d8ca825867d34ac_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\2024-09-16_504f6b94159653a22d8ca825867d34ac_avoslocker_cobalt-strike_floxif.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\2024-09-16_504f6b94159653a22d8ca825867d34ac_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\2024-09-16_504f6b94159653a22d8ca825867d34ac_avoslocker_cobalt-strike_floxif.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\2024-09-16_504f6b94159653a22d8ca825867d34ac_avoslocker_cobalt-strike_floxif.exe

"C:\Users\Admin\AppData\Local\Temp\2024-09-16_504f6b94159653a22d8ca825867d34ac_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 45.33.23.183:80 www.aieov.com tcp

Files

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

MD5 7574cf2c64f35161ab1292e2f532aabf
SHA1 14ba3fa927a06224dfe587014299e834def4644f
SHA256 de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085
SHA512 4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab

memory/468-3-0x0000000010000000-0x0000000010030000-memory.dmp

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

MD5 de3ef7d4d86df5118a8bd8e82430ce5c
SHA1 24bc48bd10d0b697419a5821ae67a4121d7c5971
SHA256 b23fa92dd0fde867503be24bf0880eb048d65244ccd4597d7ae4263f1cfbe301
SHA512 f064cacb9a7beee72320a8c2ca49f3b1c0c4306e54532d463e628e84339bd8542819c22f0388ecbce3249c4f6a11af9ab6db631080bfb03a70b49bf7f41f4f1d

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

MD5 f8fbb85cb6ee150e52b379e74708b613
SHA1 9aac20be8545d8a96a366e0b7c218cbbf9e92416
SHA256 4a097e388d2d426fbb7b91d57236d3dd3ff79252e0e93fc28fbe496fc923aa43
SHA512 fc229ae35a5883dd752e5b41f48679162778879c093d38a413435d47ad825bd2bf3041472c6ac71daf9e33e3087fd95a74a959ac6764e6d1d665f1f53661233e

memory/468-61-0x0000000000D80000-0x0000000000E1A000-memory.dmp

memory/468-63-0x0000000010000000-0x0000000010030000-memory.dmp