Malware Analysis Report

2025-01-02 07:24

Sample ID 240914-sxrrys1cnr
Target 365f5bcf960cbe33a9c429598bb1c2e3c0f399ef71313c6fd09b4a25e1f5262c
SHA256 365f5bcf960cbe33a9c429598bb1c2e3c0f399ef71313c6fd09b4a25e1f5262c
Tags
floxif backdoor discovery persistence privilege_escalation 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

365f5bcf960cbe33a9c429598bb1c2e3c0f399ef71313c6fd09b4a25e1f5262c

Threat Level: Known bad

The file 365f5bcf960cbe33a9c429598bb1c2e3c0f399ef71313c6fd09b4a25e1f5262c was found to be: Known bad.

Malicious Activity Summary

floxif backdoor discovery persistence privilege_escalation trojan upx

Floxif, Floodfix

Detects Floxif payload

Event Triggered Execution: AppInit DLLs

UPX packed file

ACProtect 1.3x - 1.4x DLL software

Loads dropped DLL

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

2024-09-14 15:30

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-09-14 15:30

Reported

2024-09-14 15:33

Platform

win7-20240903-en

Max time kernel

117s

Max time network

118s

Command Line

"C:\Users\Admin\AppData\Local\Temp\365f5bcf960cbe33a9c429598bb1c2e3c0f399ef71313c6fd09b4a25e1f5262c.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

Enumerates connected drives

Description Indicator Process Target
File opened (read-only) \??\e: C:\Users\Admin\AppData\Local\Temp\365f5bcf960cbe33a9c429598bb1c2e3c0f399ef71313c6fd09b4a25e1f5262c.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\365f5bcf960cbe33a9c429598bb1c2e3c0f399ef71313c6fd09b4a25e1f5262c.exe N/A
File created \??\c:\program files\common files\system\symsrv.dll.000 C:\Users\Admin\AppData\Local\Temp\365f5bcf960cbe33a9c429598bb1c2e3c0f399ef71313c6fd09b4a25e1f5262c.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\365f5bcf960cbe33a9c429598bb1c2e3c0f399ef71313c6fd09b4a25e1f5262c.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\365f5bcf960cbe33a9c429598bb1c2e3c0f399ef71313c6fd09b4a25e1f5262c.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\365f5bcf960cbe33a9c429598bb1c2e3c0f399ef71313c6fd09b4a25e1f5262c.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\365f5bcf960cbe33a9c429598bb1c2e3c0f399ef71313c6fd09b4a25e1f5262c.exe

"C:\Users\Admin\AppData\Local\Temp\365f5bcf960cbe33a9c429598bb1c2e3c0f399ef71313c6fd09b4a25e1f5262c.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 45.33.20.235:80 www.aieov.com tcp

Files

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

MD5 7574cf2c64f35161ab1292e2f532aabf
SHA1 14ba3fa927a06224dfe587014299e834def4644f
SHA256 de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085
SHA512 4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab

memory/1872-3-0x0000000010000000-0x0000000010030000-memory.dmp

memory/1872-14-0x0000000001350000-0x00000000013B7000-memory.dmp

memory/1872-15-0x0000000010000000-0x0000000010030000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-09-14 15:30

Reported

2024-09-14 15:33

Platform

win10v2004-20240802-en

Max time kernel

131s

Max time network

133s

Command Line

"C:\Users\Admin\AppData\Local\Temp\365f5bcf960cbe33a9c429598bb1c2e3c0f399ef71313c6fd09b4a25e1f5262c.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\365f5bcf960cbe33a9c429598bb1c2e3c0f399ef71313c6fd09b4a25e1f5262c.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\365f5bcf960cbe33a9c429598bb1c2e3c0f399ef71313c6fd09b4a25e1f5262c.exe N/A
File created \??\c:\program files\common files\system\symsrv.dll.000 C:\Users\Admin\AppData\Local\Temp\365f5bcf960cbe33a9c429598bb1c2e3c0f399ef71313c6fd09b4a25e1f5262c.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\365f5bcf960cbe33a9c429598bb1c2e3c0f399ef71313c6fd09b4a25e1f5262c.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\365f5bcf960cbe33a9c429598bb1c2e3c0f399ef71313c6fd09b4a25e1f5262c.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\365f5bcf960cbe33a9c429598bb1c2e3c0f399ef71313c6fd09b4a25e1f5262c.exe

"C:\Users\Admin\AppData\Local\Temp\365f5bcf960cbe33a9c429598bb1c2e3c0f399ef71313c6fd09b4a25e1f5262c.exe"

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe

"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --field-trial-handle=4460,i,4174666705242427184,7333705955694532165,262144 --variations-seed-version --mojo-platform-channel-handle=4092 /prefetch:8

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 228.249.119.40.in-addr.arpa udp
US 8.8.8.8:53 5isohu.com udp
US 8.8.8.8:53 73.144.22.2.in-addr.arpa 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 0.181.190.20.in-addr.arpa udp
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 58.55.71.13.in-addr.arpa udp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp

Files

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

MD5 7574cf2c64f35161ab1292e2f532aabf
SHA1 14ba3fa927a06224dfe587014299e834def4644f
SHA256 de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085
SHA512 4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab

memory/1720-2-0x0000000010000000-0x0000000010030000-memory.dmp

memory/1720-5-0x0000000000091000-0x0000000000092000-memory.dmp

memory/1720-16-0x0000000010000000-0x0000000010030000-memory.dmp

memory/1720-15-0x0000000000090000-0x00000000000F7000-memory.dmp