Malware Analysis Report

2025-01-02 07:30

Sample ID 240815-y8t94ssemh
Target afefcb34383aaebfab116ad4137a70f0N.exe
SHA256 467535fd0d8024f1168aa12511ce066da706b018ce7c34ffdfce622d1b136acb
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

467535fd0d8024f1168aa12511ce066da706b018ce7c34ffdfce622d1b136acb

Threat Level: Known bad

The file afefcb34383aaebfab116ad4137a70f0N.exe 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

ACProtect 1.3x - 1.4x DLL software

Executes dropped EXE

UPX packed file

Loads dropped DLL

Enumerates connected drives

Drops file in Program Files directory

System Location Discovery: System Language Discovery

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

Suspicious behavior: EnumeratesProcesses

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-08-15 20:27

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-08-15 20:27

Reported

2024-08-15 20:29

Platform

win7-20240704-en

Max time kernel

15s

Max time network

20s

Command Line

"C:\Users\Admin\AppData\Local\Temp\afefcb34383aaebfab116ad4137a70f0N.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

Executes dropped EXE

Description Indicator Process Target
N/A N/A \??\c:\temp\ext42438\hotfix.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) \??\w: C:\Users\Admin\AppData\Local\Temp\afefcb34383aaebfab116ad4137a70f0N.exe N/A
File opened (read-only) \??\i: C:\Users\Admin\AppData\Local\Temp\afefcb34383aaebfab116ad4137a70f0N.exe N/A
File opened (read-only) \??\l: C:\Users\Admin\AppData\Local\Temp\afefcb34383aaebfab116ad4137a70f0N.exe N/A
File opened (read-only) \??\n: C:\Users\Admin\AppData\Local\Temp\afefcb34383aaebfab116ad4137a70f0N.exe N/A
File opened (read-only) \??\o: C:\Users\Admin\AppData\Local\Temp\afefcb34383aaebfab116ad4137a70f0N.exe N/A
File opened (read-only) \??\r: C:\Users\Admin\AppData\Local\Temp\afefcb34383aaebfab116ad4137a70f0N.exe N/A
File opened (read-only) \??\s: C:\Users\Admin\AppData\Local\Temp\afefcb34383aaebfab116ad4137a70f0N.exe N/A
File opened (read-only) \??\v: C:\Users\Admin\AppData\Local\Temp\afefcb34383aaebfab116ad4137a70f0N.exe N/A
File opened (read-only) \??\y: C:\Users\Admin\AppData\Local\Temp\afefcb34383aaebfab116ad4137a70f0N.exe N/A
File opened (read-only) \??\z: C:\Users\Admin\AppData\Local\Temp\afefcb34383aaebfab116ad4137a70f0N.exe N/A
File opened (read-only) \??\t: C:\Users\Admin\AppData\Local\Temp\afefcb34383aaebfab116ad4137a70f0N.exe N/A
File opened (read-only) \??\u: C:\Users\Admin\AppData\Local\Temp\afefcb34383aaebfab116ad4137a70f0N.exe N/A
File opened (read-only) \??\a: C:\Users\Admin\AppData\Local\Temp\afefcb34383aaebfab116ad4137a70f0N.exe N/A
File opened (read-only) \??\b: C:\Users\Admin\AppData\Local\Temp\afefcb34383aaebfab116ad4137a70f0N.exe N/A
File opened (read-only) \??\h: C:\Users\Admin\AppData\Local\Temp\afefcb34383aaebfab116ad4137a70f0N.exe N/A
File opened (read-only) \??\k: C:\Users\Admin\AppData\Local\Temp\afefcb34383aaebfab116ad4137a70f0N.exe N/A
File opened (read-only) \??\x: C:\Users\Admin\AppData\Local\Temp\afefcb34383aaebfab116ad4137a70f0N.exe N/A
File opened (read-only) \??\e: C:\Users\Admin\AppData\Local\Temp\afefcb34383aaebfab116ad4137a70f0N.exe N/A
File opened (read-only) \??\g: C:\Users\Admin\AppData\Local\Temp\afefcb34383aaebfab116ad4137a70f0N.exe N/A
File opened (read-only) \??\j: C:\Users\Admin\AppData\Local\Temp\afefcb34383aaebfab116ad4137a70f0N.exe N/A
File opened (read-only) \??\m: C:\Users\Admin\AppData\Local\Temp\afefcb34383aaebfab116ad4137a70f0N.exe N/A
File opened (read-only) \??\p: C:\Users\Admin\AppData\Local\Temp\afefcb34383aaebfab116ad4137a70f0N.exe N/A
File opened (read-only) \??\q: C:\Users\Admin\AppData\Local\Temp\afefcb34383aaebfab116ad4137a70f0N.exe N/A

Drops file in Program Files directory

Description Indicator Process Target
File created \??\c:\program files\common files\system\symsrv.dll.000 C:\Users\Admin\AppData\Local\Temp\afefcb34383aaebfab116ad4137a70f0N.exe N/A
File created C:\Program Files\Common Files\System\symsrv.dll C:\Users\Admin\AppData\Local\Temp\afefcb34383aaebfab116ad4137a70f0N.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\afefcb34383aaebfab116ad4137a70f0N.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language \??\c:\temp\ext42438\hotfix.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\afefcb34383aaebfab116ad4137a70f0N.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\afefcb34383aaebfab116ad4137a70f0N.exe N/A
Token: SeRestorePrivilege N/A \??\c:\temp\ext42438\hotfix.exe N/A
Token: SeRestorePrivilege N/A \??\c:\temp\ext42438\hotfix.exe N/A
Token: SeRestorePrivilege N/A \??\c:\temp\ext42438\hotfix.exe N/A
Token: SeRestorePrivilege N/A \??\c:\temp\ext42438\hotfix.exe N/A
Token: SeRestorePrivilege N/A \??\c:\temp\ext42438\hotfix.exe N/A
Token: SeRestorePrivilege N/A \??\c:\temp\ext42438\hotfix.exe N/A
Token: SeRestorePrivilege N/A \??\c:\temp\ext42438\hotfix.exe N/A
Token: SeDebugPrivilege N/A \??\c:\temp\ext42438\hotfix.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\afefcb34383aaebfab116ad4137a70f0N.exe

"C:\Users\Admin\AppData\Local\Temp\afefcb34383aaebfab116ad4137a70f0N.exe"

\??\c:\temp\ext42438\hotfix.exe

c:\temp\ext42438\hotfix.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 45.56.79.23:80 www.aieov.com tcp

Files

memory/2928-0-0x0000000005000000-0x0000000005018000-memory.dmp

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

MD5 7574cf2c64f35161ab1292e2f532aabf
SHA1 14ba3fa927a06224dfe587014299e834def4644f
SHA256 de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085
SHA512 4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab

memory/2928-4-0x0000000010000000-0x0000000010030000-memory.dmp

memory/2928-8-0x0000000005001000-0x0000000005002000-memory.dmp

memory/2928-9-0x0000000005000000-0x0000000005018000-memory.dmp

\temp\ext42438\hotfix.exe

MD5 155fc68d5d845947cd0cba8a40eb2ea1
SHA1 1bc25d1dab8cabad382107744f3c6a59036c2b9d
SHA256 0fe1846a38abb3bd9e1bec74a846cf5bd8a38f508cd629b5bea3c306fea9511c
SHA512 4d9ba8fdf861c00bb701cf5de519d42bdc2bac27171b87f65a308a32bd4c8fe4f556fd659706c2eb5078d5b9952cc3815f76c9859c256275571c3865e2bad7ce

memory/2800-30-0x0000000010000000-0x0000000010030000-memory.dmp

\??\c:\temp\ext42438\hotfix.inf

MD5 1fd2b85cc8c265b4f4867e7e31387d52
SHA1 80b0921ea64022ebb5a3fee82f59f0e1deedd852
SHA256 a9e5074c188d78ccb3e1d4ee28cc48d208357d6f25353c28571fa0a6eaaa474a
SHA512 0664941ac3d88528d8c8254b25c29d5662fd8979f5c66604225fc9fb63d400c835f78230a8cd99ea28127b79837e2177475a8ee086737fec5206f9cd1d830300

C:\temp\ext42438\hotfix.exe.tmp

MD5 0c74bb15aa1ca622eb12f86e5bb84900
SHA1 2711e96791b6da42690b89e76124ffa77678c4b7
SHA256 120365010314b74b0bb425d1c86615802e48fcf1ceb6130dc9f0c34969dc260b
SHA512 e0abb2ddbaa984f0b3b1a341a21639412d452891f0bd97f95b52cf497dd066c3b3fa29fdf1baed90082aa68d2aedd8c6483a3b63a2634b1e0369446966104a78

memory/2928-36-0x0000000010000000-0x0000000010030000-memory.dmp

memory/2928-37-0x0000000005001000-0x0000000005002000-memory.dmp

memory/2928-38-0x0000000005000000-0x0000000005018000-memory.dmp

memory/2928-39-0x0000000010000000-0x0000000010030000-memory.dmp

memory/2800-40-0x0000000001000000-0x0000000001040000-memory.dmp

memory/2800-42-0x0000000010000000-0x0000000010030000-memory.dmp

memory/2800-41-0x0000000010000000-0x0000000010030000-memory.dmp

memory/2800-43-0x0000000001000000-0x0000000001040000-memory.dmp

memory/2800-45-0x0000000010000000-0x0000000010030000-memory.dmp

memory/2928-54-0x0000000010000000-0x0000000010030000-memory.dmp

memory/2928-53-0x0000000005000000-0x0000000005018000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-08-15 20:27

Reported

2024-08-15 20:29

Platform

win10v2004-20240802-en

Max time kernel

113s

Max time network

114s

Command Line

"C:\Users\Admin\AppData\Local\Temp\afefcb34383aaebfab116ad4137a70f0N.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

Executes dropped EXE

Description Indicator Process Target
N/A N/A \??\c:\temp\ext42438\hotfix.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

Enumerates connected drives

Description Indicator Process Target
File opened (read-only) \??\q: C:\Users\Admin\AppData\Local\Temp\afefcb34383aaebfab116ad4137a70f0N.exe N/A
File opened (read-only) \??\r: C:\Users\Admin\AppData\Local\Temp\afefcb34383aaebfab116ad4137a70f0N.exe N/A
File opened (read-only) \??\x: C:\Users\Admin\AppData\Local\Temp\afefcb34383aaebfab116ad4137a70f0N.exe N/A
File opened (read-only) \??\y: C:\Users\Admin\AppData\Local\Temp\afefcb34383aaebfab116ad4137a70f0N.exe N/A
File opened (read-only) \??\b: C:\Users\Admin\AppData\Local\Temp\afefcb34383aaebfab116ad4137a70f0N.exe N/A
File opened (read-only) \??\o: C:\Users\Admin\AppData\Local\Temp\afefcb34383aaebfab116ad4137a70f0N.exe N/A
File opened (read-only) \??\g: C:\Users\Admin\AppData\Local\Temp\afefcb34383aaebfab116ad4137a70f0N.exe N/A
File opened (read-only) \??\h: C:\Users\Admin\AppData\Local\Temp\afefcb34383aaebfab116ad4137a70f0N.exe N/A
File opened (read-only) \??\l: C:\Users\Admin\AppData\Local\Temp\afefcb34383aaebfab116ad4137a70f0N.exe N/A
File opened (read-only) \??\w: C:\Users\Admin\AppData\Local\Temp\afefcb34383aaebfab116ad4137a70f0N.exe N/A
File opened (read-only) \??\a: C:\Users\Admin\AppData\Local\Temp\afefcb34383aaebfab116ad4137a70f0N.exe N/A
File opened (read-only) \??\e: C:\Users\Admin\AppData\Local\Temp\afefcb34383aaebfab116ad4137a70f0N.exe N/A
File opened (read-only) \??\m: C:\Users\Admin\AppData\Local\Temp\afefcb34383aaebfab116ad4137a70f0N.exe N/A
File opened (read-only) \??\t: C:\Users\Admin\AppData\Local\Temp\afefcb34383aaebfab116ad4137a70f0N.exe N/A
File opened (read-only) \??\u: C:\Users\Admin\AppData\Local\Temp\afefcb34383aaebfab116ad4137a70f0N.exe N/A
File opened (read-only) \??\v: C:\Users\Admin\AppData\Local\Temp\afefcb34383aaebfab116ad4137a70f0N.exe N/A
File opened (read-only) \??\z: C:\Users\Admin\AppData\Local\Temp\afefcb34383aaebfab116ad4137a70f0N.exe N/A
File opened (read-only) \??\i: C:\Users\Admin\AppData\Local\Temp\afefcb34383aaebfab116ad4137a70f0N.exe N/A
File opened (read-only) \??\j: C:\Users\Admin\AppData\Local\Temp\afefcb34383aaebfab116ad4137a70f0N.exe N/A
File opened (read-only) \??\p: C:\Users\Admin\AppData\Local\Temp\afefcb34383aaebfab116ad4137a70f0N.exe N/A
File opened (read-only) \??\s: C:\Users\Admin\AppData\Local\Temp\afefcb34383aaebfab116ad4137a70f0N.exe N/A
File opened (read-only) \??\k: C:\Users\Admin\AppData\Local\Temp\afefcb34383aaebfab116ad4137a70f0N.exe N/A
File opened (read-only) \??\n: C:\Users\Admin\AppData\Local\Temp\afefcb34383aaebfab116ad4137a70f0N.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\afefcb34383aaebfab116ad4137a70f0N.exe N/A
File created \??\c:\program files\common files\system\symsrv.dll.000 C:\Users\Admin\AppData\Local\Temp\afefcb34383aaebfab116ad4137a70f0N.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\afefcb34383aaebfab116ad4137a70f0N.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language \??\c:\temp\ext42438\hotfix.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\afefcb34383aaebfab116ad4137a70f0N.exe N/A
Token: SeDebugPrivilege N/A \??\c:\temp\ext42438\hotfix.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\afefcb34383aaebfab116ad4137a70f0N.exe

"C:\Users\Admin\AppData\Local\Temp\afefcb34383aaebfab116ad4137a70f0N.exe"

\??\c:\temp\ext42438\hotfix.exe

c:\temp\ext42438\hotfix.exe

Network

Country Destination Domain Proto
US 8.8.8.8:53 232.168.11.51.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.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 26.35.223.20.in-addr.arpa udp
US 8.8.8.8:53 196.19.79.45.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 28.118.140.52.in-addr.arpa udp
US 8.8.8.8:53 183.59.114.20.in-addr.arpa udp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
US 8.8.8.8:53 24.140.123.92.in-addr.arpa udp
US 8.8.8.8:53 42.56.20.217.in-addr.arpa udp
US 8.8.8.8:53 57.169.31.20.in-addr.arpa udp
US 8.8.8.8:53 48.229.111.52.in-addr.arpa udp
US 8.8.8.8:53 205.47.74.20.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp

Files

memory/3632-0-0x0000000005000000-0x0000000005018000-memory.dmp

memory/3632-5-0x0000000010000000-0x0000000010030000-memory.dmp

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

MD5 7574cf2c64f35161ab1292e2f532aabf
SHA1 14ba3fa927a06224dfe587014299e834def4644f
SHA256 de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085
SHA512 4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab

memory/3632-10-0x0000000005000000-0x0000000005018000-memory.dmp

memory/3632-9-0x0000000005001000-0x0000000005002000-memory.dmp

memory/3084-26-0x0000000010000000-0x0000000010030000-memory.dmp

\??\c:\temp\ext42438\hotfix.inf

MD5 1fd2b85cc8c265b4f4867e7e31387d52
SHA1 80b0921ea64022ebb5a3fee82f59f0e1deedd852
SHA256 a9e5074c188d78ccb3e1d4ee28cc48d208357d6f25353c28571fa0a6eaaa474a
SHA512 0664941ac3d88528d8c8254b25c29d5662fd8979f5c66604225fc9fb63d400c835f78230a8cd99ea28127b79837e2177475a8ee086737fec5206f9cd1d830300

\??\c:\temp\ext42438\hotfix.exe

MD5 155fc68d5d845947cd0cba8a40eb2ea1
SHA1 1bc25d1dab8cabad382107744f3c6a59036c2b9d
SHA256 0fe1846a38abb3bd9e1bec74a846cf5bd8a38f508cd629b5bea3c306fea9511c
SHA512 4d9ba8fdf861c00bb701cf5de519d42bdc2bac27171b87f65a308a32bd4c8fe4f556fd659706c2eb5078d5b9952cc3815f76c9859c256275571c3865e2bad7ce

C:\temp\ext42438\hotfix.exe.tmp

MD5 cfc1449cd14a8c1494cb1ca6571deaa7
SHA1 a095841ab7e0c436f73bc61ff37175ef321bef24
SHA256 2242c7f3ffe3e45023c467cbed17c1379ddff46b1779ce010bdb1cd2b1af0794
SHA512 a242274f8b7f75128f65c40f08eb8fec21f2dc337807a088adca7f154988c52bbc3b3d9d0d4ca1256180b43f29f1bc4e80d537e680994d1b952bb3a5b769a399

memory/3632-35-0x0000000005000000-0x0000000005018000-memory.dmp

memory/3632-37-0x0000000010000000-0x0000000010030000-memory.dmp

memory/3632-40-0x0000000005001000-0x0000000005002000-memory.dmp

memory/3084-41-0x0000000010000000-0x0000000010030000-memory.dmp

memory/3632-42-0x0000000010000000-0x0000000010030000-memory.dmp

memory/3632-55-0x0000000005000000-0x0000000005018000-memory.dmp

memory/3632-54-0x0000000010000000-0x0000000010030000-memory.dmp

memory/3084-47-0x0000000010000000-0x0000000010030000-memory.dmp