Malware Analysis Report

2024-12-08 02:42

Sample ID 240913-eqgfratgnb
Target 4f87ad6c7b509210e0d5843a36b8fb90N
SHA256 0f6200c1c3b5e18d3dbc5c44295913e5ab5fea906998622ab9acf8f75c857262
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

0f6200c1c3b5e18d3dbc5c44295913e5ab5fea906998622ab9acf8f75c857262

Threat Level: Known bad

The file 4f87ad6c7b509210e0d5843a36b8fb90N 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

ACProtect 1.3x - 1.4x DLL software

Loads dropped DLL

UPX packed file

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

2024-09-13 04:08

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-09-13 04:08

Reported

2024-09-13 04:10

Platform

win7-20240704-en

Max time kernel

119s

Max time network

56s

Command Line

"C:\Users\Admin\AppData\Local\Temp\4f87ad6c7b509210e0d5843a36b8fb90N.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\4f87ad6c7b509210e0d5843a36b8fb90N.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
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\4f87ad6c7b509210e0d5843a36b8fb90N.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\4f87ad6c7b509210e0d5843a36b8fb90N.exe N/A
File created \??\c:\program files\common files\system\symsrv.dll.000 C:\Users\Admin\AppData\Local\Temp\4f87ad6c7b509210e0d5843a36b8fb90N.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\4f87ad6c7b509210e0d5843a36b8fb90N.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\4f87ad6c7b509210e0d5843a36b8fb90N.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\4f87ad6c7b509210e0d5843a36b8fb90N.exe

"C:\Users\Admin\AppData\Local\Temp\4f87ad6c7b509210e0d5843a36b8fb90N.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
US 45.33.23.183:80 www.aieov.com tcp
US 45.33.23.183:80 www.aieov.com tcp
US 45.33.23.183:80 www.aieov.com tcp
US 45.33.23.183:80 www.aieov.com tcp
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/2932-3-0x0000000010000000-0x0000000010030000-memory.dmp

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

MD5 c8ecf7c828d6119c34aa9b7755fe416e
SHA1 f61ad6f986af10234ded6473e6769dc62bcd1ad1
SHA256 e40d36101996053ebb254aea9feeb6c4113190fec96e67c17b34639f2238e19e
SHA512 795c7b1a3f7ebed5f71a0ff7f769c642be9488e5b13cefceb0ff9ddd336b8c3211054b2dbbd26403aebb9979bf8f0c895b138167957f7b63eed9026bc8bf8293

memory/2932-75-0x0000000000E90000-0x0000000000EB2000-memory.dmp

memory/2932-77-0x0000000010000000-0x0000000010030000-memory.dmp

memory/2932-76-0x0000000010000000-0x0000000010030000-memory.dmp

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

MD5 e611da34beb71135bb39d507d4d87951
SHA1 fff51f7cfadfe811b62e5686ef8fa7c0ebdbc27a
SHA256 d79355e0bd1fcd0972151758edf92ebba0079c1021c60f471d2bea4aaa14739f
SHA512 c359eaee87e1bc8725d5090d423f43d7c595553e88cb7561ed580595939070dac56380220d770b73dcfa3011d7427326b7fcd72f2c033e1250a5c403c820eca5

memory/2932-140-0x0000000000E90000-0x0000000000EB2000-memory.dmp

memory/2932-141-0x0000000010000000-0x0000000010030000-memory.dmp

memory/2932-205-0x0000000010000000-0x0000000010030000-memory.dmp

memory/2932-204-0x0000000000E90000-0x0000000000EB2000-memory.dmp

memory/2932-268-0x0000000000E90000-0x0000000000EB2000-memory.dmp

memory/2932-269-0x0000000010000000-0x0000000010030000-memory.dmp

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

MD5 1130c911bf5db4b8f7cf9b6f4b457623
SHA1 48e734c4bc1a8b5399bff4954e54b268bde9d54c
SHA256 eba08cc8182f379392a97f542b350ea0dbbe5e4009472f35af20e3d857eafdf1
SHA512 94e2511ef2c53494c2aff0960266491ffc0e54e75185427d1ccedae27c286992c754ca94cbb0c9ea36e3f04cd4eb7f032c551cf2d4b309f292906303f1a75fa0

memory/2932-332-0x0000000000E90000-0x0000000000EB2000-memory.dmp

memory/2932-333-0x0000000010000000-0x0000000010030000-memory.dmp

memory/2932-397-0x0000000010000000-0x0000000010030000-memory.dmp

memory/2932-396-0x0000000000E90000-0x0000000000EB2000-memory.dmp

memory/2932-452-0x0000000000E90000-0x0000000000EB2000-memory.dmp

memory/2932-514-0x0000000000E90000-0x0000000000EB2000-memory.dmp

memory/2932-576-0x0000000000E90000-0x0000000000EB2000-memory.dmp

memory/2932-638-0x0000000000E90000-0x0000000000EB2000-memory.dmp

memory/2932-700-0x0000000000E90000-0x0000000000EB2000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-09-13 04:08

Reported

2024-09-13 04:10

Platform

win10v2004-20240802-en

Max time kernel

119s

Max time network

94s

Command Line

"C:\Users\Admin\AppData\Local\Temp\4f87ad6c7b509210e0d5843a36b8fb90N.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

Loads dropped DLL

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\4f87ad6c7b509210e0d5843a36b8fb90N.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\4f87ad6c7b509210e0d5843a36b8fb90N.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\4f87ad6c7b509210e0d5843a36b8fb90N.exe N/A
File created \??\c:\program files\common files\system\symsrv.dll.000 C:\Users\Admin\AppData\Local\Temp\4f87ad6c7b509210e0d5843a36b8fb90N.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\4f87ad6c7b509210e0d5843a36b8fb90N.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\4f87ad6c7b509210e0d5843a36b8fb90N.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\4f87ad6c7b509210e0d5843a36b8fb90N.exe

"C:\Users\Admin\AppData\Local\Temp\4f87ad6c7b509210e0d5843a36b8fb90N.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 45.33.18.44:80 www.aieov.com tcp
US 8.8.8.8:53 44.18.33.45.in-addr.arpa udp
US 8.8.8.8:53 217.106.137.52.in-addr.arpa udp
US 8.8.8.8:53 73.144.22.2.in-addr.arpa udp
US 8.8.8.8:53 71.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 5isohu.com udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 45.33.18.44:80 www.aieov.com tcp
US 8.8.8.8:53 13.86.106.20.in-addr.arpa udp
US 8.8.8.8:53 5isohu.com udp
US 45.33.18.44:80 www.aieov.com tcp
US 8.8.8.8:53 196.249.167.52.in-addr.arpa udp
US 45.33.18.44:80 www.aieov.com tcp
US 8.8.8.8:53 5isohu.com udp
US 45.33.18.44:80 www.aieov.com tcp
US 8.8.8.8:53 5isohu.com udp
US 45.33.18.44:80 www.aieov.com tcp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 81.144.22.2.in-addr.arpa udp
US 52.111.227.11:443 tcp
US 8.8.8.8:53 48.229.111.52.in-addr.arpa udp

Files

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

MD5 7574cf2c64f35161ab1292e2f532aabf
SHA1 14ba3fa927a06224dfe587014299e834def4644f
SHA256 de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085
SHA512 4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab

memory/3728-2-0x0000000010000000-0x0000000010030000-memory.dmp

memory/3728-78-0x0000000000130000-0x0000000000152000-memory.dmp

memory/3728-79-0x0000000010000000-0x0000000010030000-memory.dmp

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

MD5 6ee3dd927d5566bc38543c4ca6818ca2
SHA1 db1a56c1407d3fb4260317d4f92887b0320fcf01
SHA256 53aff9e198983762c7767e4c85eff74de89ef5148d1795c675f76f8fb03777b0
SHA512 eaeb0f941ce6af518f5fd94ea312f307673ad8e799b1439f6e329f72a36168afa0bc9681915929175d1163cd5020b8a19d5e65d432f6d56b70bcb83ae8d8ae7b

memory/3728-144-0x0000000000130000-0x0000000000152000-memory.dmp

memory/3728-145-0x0000000010000000-0x0000000010030000-memory.dmp

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

MD5 1130c911bf5db4b8f7cf9b6f4b457623
SHA1 48e734c4bc1a8b5399bff4954e54b268bde9d54c
SHA256 eba08cc8182f379392a97f542b350ea0dbbe5e4009472f35af20e3d857eafdf1
SHA512 94e2511ef2c53494c2aff0960266491ffc0e54e75185427d1ccedae27c286992c754ca94cbb0c9ea36e3f04cd4eb7f032c551cf2d4b309f292906303f1a75fa0

memory/3728-210-0x0000000000130000-0x0000000000152000-memory.dmp

memory/3728-211-0x0000000010000000-0x0000000010030000-memory.dmp

memory/3728-272-0x0000000000130000-0x0000000000152000-memory.dmp

memory/3728-334-0x0000000000130000-0x0000000000152000-memory.dmp

memory/3728-396-0x0000000000130000-0x0000000000152000-memory.dmp

memory/3728-458-0x0000000000130000-0x0000000000152000-memory.dmp

memory/3728-520-0x0000000000130000-0x0000000000152000-memory.dmp

memory/3728-582-0x0000000000130000-0x0000000000152000-memory.dmp

memory/3728-583-0x0000000010000000-0x0000000010030000-memory.dmp

memory/3728-644-0x0000000000130000-0x0000000000152000-memory.dmp

memory/3728-700-0x0000000000130000-0x0000000000152000-memory.dmp