Malware Analysis Report

2025-01-02 07:28

Sample ID 240816-f9xshsxhlg
Target 088ab7568c9643ac6f30eb7b010b4840N.exe
SHA256 9266ce6df62c50031384c330a0f5faf2dc69b3f4b904a504b030a55f6944efa0
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

9266ce6df62c50031384c330a0f5faf2dc69b3f4b904a504b030a55f6944efa0

Threat Level: Known bad

The file 088ab7568c9643ac6f30eb7b010b4840N.exe 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

Executes dropped EXE

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

2024-08-16 05:34

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-08-16 05:34

Reported

2024-08-16 05:37

Platform

win7-20240704-en

Max time kernel

13s

Max time network

20s

Command Line

"C:\Users\Admin\AppData\Local\Temp\088ab7568c9643ac6f30eb7b010b4840N.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

Executes dropped EXE

Description Indicator Process Target
N/A N/A \??\c:\temp\ext43230\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

Enumerates connected drives

Description Indicator Process Target
File opened (read-only) \??\r: C:\Users\Admin\AppData\Local\Temp\088ab7568c9643ac6f30eb7b010b4840N.exe N/A
File opened (read-only) \??\x: C:\Users\Admin\AppData\Local\Temp\088ab7568c9643ac6f30eb7b010b4840N.exe N/A
File opened (read-only) \??\z: C:\Users\Admin\AppData\Local\Temp\088ab7568c9643ac6f30eb7b010b4840N.exe N/A
File opened (read-only) \??\g: C:\Users\Admin\AppData\Local\Temp\088ab7568c9643ac6f30eb7b010b4840N.exe N/A
File opened (read-only) \??\h: C:\Users\Admin\AppData\Local\Temp\088ab7568c9643ac6f30eb7b010b4840N.exe N/A
File opened (read-only) \??\l: C:\Users\Admin\AppData\Local\Temp\088ab7568c9643ac6f30eb7b010b4840N.exe N/A
File opened (read-only) \??\q: C:\Users\Admin\AppData\Local\Temp\088ab7568c9643ac6f30eb7b010b4840N.exe N/A
File opened (read-only) \??\a: C:\Users\Admin\AppData\Local\Temp\088ab7568c9643ac6f30eb7b010b4840N.exe N/A
File opened (read-only) \??\k: C:\Users\Admin\AppData\Local\Temp\088ab7568c9643ac6f30eb7b010b4840N.exe N/A
File opened (read-only) \??\n: C:\Users\Admin\AppData\Local\Temp\088ab7568c9643ac6f30eb7b010b4840N.exe N/A
File opened (read-only) \??\m: C:\Users\Admin\AppData\Local\Temp\088ab7568c9643ac6f30eb7b010b4840N.exe N/A
File opened (read-only) \??\s: C:\Users\Admin\AppData\Local\Temp\088ab7568c9643ac6f30eb7b010b4840N.exe N/A
File opened (read-only) \??\u: C:\Users\Admin\AppData\Local\Temp\088ab7568c9643ac6f30eb7b010b4840N.exe N/A
File opened (read-only) \??\w: C:\Users\Admin\AppData\Local\Temp\088ab7568c9643ac6f30eb7b010b4840N.exe N/A
File opened (read-only) \??\b: C:\Users\Admin\AppData\Local\Temp\088ab7568c9643ac6f30eb7b010b4840N.exe N/A
File opened (read-only) \??\e: C:\Users\Admin\AppData\Local\Temp\088ab7568c9643ac6f30eb7b010b4840N.exe N/A
File opened (read-only) \??\i: C:\Users\Admin\AppData\Local\Temp\088ab7568c9643ac6f30eb7b010b4840N.exe N/A
File opened (read-only) \??\j: C:\Users\Admin\AppData\Local\Temp\088ab7568c9643ac6f30eb7b010b4840N.exe N/A
File opened (read-only) \??\y: C:\Users\Admin\AppData\Local\Temp\088ab7568c9643ac6f30eb7b010b4840N.exe N/A
File opened (read-only) \??\o: C:\Users\Admin\AppData\Local\Temp\088ab7568c9643ac6f30eb7b010b4840N.exe N/A
File opened (read-only) \??\p: C:\Users\Admin\AppData\Local\Temp\088ab7568c9643ac6f30eb7b010b4840N.exe N/A
File opened (read-only) \??\t: C:\Users\Admin\AppData\Local\Temp\088ab7568c9643ac6f30eb7b010b4840N.exe N/A
File opened (read-only) \??\v: C:\Users\Admin\AppData\Local\Temp\088ab7568c9643ac6f30eb7b010b4840N.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\088ab7568c9643ac6f30eb7b010b4840N.exe N/A
File created \??\c:\program files\common files\system\symsrv.dll.000 C:\Users\Admin\AppData\Local\Temp\088ab7568c9643ac6f30eb7b010b4840N.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\088ab7568c9643ac6f30eb7b010b4840N.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language \??\c:\temp\ext43230\hotfix.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\088ab7568c9643ac6f30eb7b010b4840N.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\088ab7568c9643ac6f30eb7b010b4840N.exe N/A
Token: SeRestorePrivilege N/A \??\c:\temp\ext43230\hotfix.exe N/A
Token: SeRestorePrivilege N/A \??\c:\temp\ext43230\hotfix.exe N/A
Token: SeRestorePrivilege N/A \??\c:\temp\ext43230\hotfix.exe N/A
Token: SeRestorePrivilege N/A \??\c:\temp\ext43230\hotfix.exe N/A
Token: SeRestorePrivilege N/A \??\c:\temp\ext43230\hotfix.exe N/A
Token: SeRestorePrivilege N/A \??\c:\temp\ext43230\hotfix.exe N/A
Token: SeRestorePrivilege N/A \??\c:\temp\ext43230\hotfix.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\088ab7568c9643ac6f30eb7b010b4840N.exe

"C:\Users\Admin\AppData\Local\Temp\088ab7568c9643ac6f30eb7b010b4840N.exe"

\??\c:\temp\ext43230\hotfix.exe

c:\temp\ext43230\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 45.33.30.197:80 www.aieov.com tcp

Files

memory/2544-0-0x0000000005000000-0x0000000005018000-memory.dmp

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

MD5 7574cf2c64f35161ab1292e2f532aabf
SHA1 14ba3fa927a06224dfe587014299e834def4644f
SHA256 de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085
SHA512 4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab

memory/2544-4-0x0000000010000000-0x0000000010030000-memory.dmp

memory/2544-7-0x0000000005000000-0x0000000005018000-memory.dmp

memory/2544-6-0x0000000005001000-0x0000000005002000-memory.dmp

\temp\ext43230\hotfix.exe

MD5 83e844476b1efebd5b8e736d91e4da69
SHA1 b2810ce0757b8a02ffe3a49d07a2c626bfdbf191
SHA256 1d13837813f9f7649908f5aa628e1d836eae0f627507908e63bdde1ddcfc9b92
SHA512 e4aba7c52bc574324f9ad5d8d2d90d212de0613f4a8e7221f2b0126e90f32eaa90b660f1958d71fb1b0ab9106ac1b15e510d490c2dc3a5c984e9d6b6acda4a23

\??\c:\temp\ext43230\hotfix.inf

MD5 4b838a0d7b6fdae782470c93be1ed392
SHA1 92fccc3cc389b13aba0710f2a1a3a1282073eea6
SHA256 4c60925712c9cc19e2cd213db3466c5c7f466a667765934d3526cf3ced4e9608
SHA512 ab3241b8be4d83c3e0a46a6493452768769dc5d2127672250ad8e3c014956d00480f48ff0e04c42c432e7982c73ed1a68ec22d10be1f39cfa83895fe819407b2

\temp\ext43230\hotfix.exe.tmp

MD5 97005eb6b963d0614fe960a81b1f9a1e
SHA1 48f4b30b42b260ea006c6cfeccc7dd50aef459d0
SHA256 a8ac90122d5b21a62e9e2ba56ed49a1d93594022c38859cf9943d6f8884b5b1a
SHA512 ad5e7b08e88bfec33fc9c0efe6b8d13b0e04dd2a972b3c900ff84a3be2b69e40a67dfa86ae8dbba0fae62cab67e52b4c1fcd4a5d3a5e82ac77873af66b65face

memory/2544-43-0x0000000010000000-0x0000000010030000-memory.dmp

memory/2544-45-0x0000000005000000-0x0000000005018000-memory.dmp

memory/2544-44-0x0000000005001000-0x0000000005002000-memory.dmp

memory/2544-46-0x0000000010000000-0x0000000010030000-memory.dmp

memory/2544-54-0x0000000010000000-0x0000000010030000-memory.dmp

memory/2544-55-0x0000000005000000-0x0000000005018000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-08-16 05:34

Reported

2024-08-16 05:37

Platform

win10v2004-20240802-en

Max time kernel

99s

Max time network

118s

Command Line

"C:\Users\Admin\AppData\Local\Temp\088ab7568c9643ac6f30eb7b010b4840N.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

Executes dropped EXE

Description Indicator Process Target
N/A N/A \??\c:\temp\ext43230\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

Enumerates connected drives

Description Indicator Process Target
File opened (read-only) \??\t: C:\Users\Admin\AppData\Local\Temp\088ab7568c9643ac6f30eb7b010b4840N.exe N/A
File opened (read-only) \??\u: C:\Users\Admin\AppData\Local\Temp\088ab7568c9643ac6f30eb7b010b4840N.exe N/A
File opened (read-only) \??\z: C:\Users\Admin\AppData\Local\Temp\088ab7568c9643ac6f30eb7b010b4840N.exe N/A
File opened (read-only) \??\e: C:\Users\Admin\AppData\Local\Temp\088ab7568c9643ac6f30eb7b010b4840N.exe N/A
File opened (read-only) \??\n: C:\Users\Admin\AppData\Local\Temp\088ab7568c9643ac6f30eb7b010b4840N.exe N/A
File opened (read-only) \??\o: C:\Users\Admin\AppData\Local\Temp\088ab7568c9643ac6f30eb7b010b4840N.exe N/A
File opened (read-only) \??\p: C:\Users\Admin\AppData\Local\Temp\088ab7568c9643ac6f30eb7b010b4840N.exe N/A
File opened (read-only) \??\q: C:\Users\Admin\AppData\Local\Temp\088ab7568c9643ac6f30eb7b010b4840N.exe N/A
File opened (read-only) \??\w: C:\Users\Admin\AppData\Local\Temp\088ab7568c9643ac6f30eb7b010b4840N.exe N/A
File opened (read-only) \??\b: C:\Users\Admin\AppData\Local\Temp\088ab7568c9643ac6f30eb7b010b4840N.exe N/A
File opened (read-only) \??\j: C:\Users\Admin\AppData\Local\Temp\088ab7568c9643ac6f30eb7b010b4840N.exe N/A
File opened (read-only) \??\l: C:\Users\Admin\AppData\Local\Temp\088ab7568c9643ac6f30eb7b010b4840N.exe N/A
File opened (read-only) \??\m: C:\Users\Admin\AppData\Local\Temp\088ab7568c9643ac6f30eb7b010b4840N.exe N/A
File opened (read-only) \??\a: C:\Users\Admin\AppData\Local\Temp\088ab7568c9643ac6f30eb7b010b4840N.exe N/A
File opened (read-only) \??\h: C:\Users\Admin\AppData\Local\Temp\088ab7568c9643ac6f30eb7b010b4840N.exe N/A
File opened (read-only) \??\v: C:\Users\Admin\AppData\Local\Temp\088ab7568c9643ac6f30eb7b010b4840N.exe N/A
File opened (read-only) \??\x: C:\Users\Admin\AppData\Local\Temp\088ab7568c9643ac6f30eb7b010b4840N.exe N/A
File opened (read-only) \??\s: C:\Users\Admin\AppData\Local\Temp\088ab7568c9643ac6f30eb7b010b4840N.exe N/A
File opened (read-only) \??\y: C:\Users\Admin\AppData\Local\Temp\088ab7568c9643ac6f30eb7b010b4840N.exe N/A
File opened (read-only) \??\g: C:\Users\Admin\AppData\Local\Temp\088ab7568c9643ac6f30eb7b010b4840N.exe N/A
File opened (read-only) \??\i: C:\Users\Admin\AppData\Local\Temp\088ab7568c9643ac6f30eb7b010b4840N.exe N/A
File opened (read-only) \??\k: C:\Users\Admin\AppData\Local\Temp\088ab7568c9643ac6f30eb7b010b4840N.exe N/A
File opened (read-only) \??\r: C:\Users\Admin\AppData\Local\Temp\088ab7568c9643ac6f30eb7b010b4840N.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\088ab7568c9643ac6f30eb7b010b4840N.exe N/A
File created \??\c:\program files\common files\system\symsrv.dll.000 C:\Users\Admin\AppData\Local\Temp\088ab7568c9643ac6f30eb7b010b4840N.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\088ab7568c9643ac6f30eb7b010b4840N.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language \??\c:\temp\ext43230\hotfix.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\088ab7568c9643ac6f30eb7b010b4840N.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\088ab7568c9643ac6f30eb7b010b4840N.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\088ab7568c9643ac6f30eb7b010b4840N.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\088ab7568c9643ac6f30eb7b010b4840N.exe

"C:\Users\Admin\AppData\Local\Temp\088ab7568c9643ac6f30eb7b010b4840N.exe"

\??\c:\temp\ext43230\hotfix.exe

c:\temp\ext43230\hotfix.exe

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 149.220.183.52.in-addr.arpa udp
US 8.8.8.8:53 g.bing.com udp
US 13.107.21.237:443 g.bing.com tcp
US 8.8.8.8:53 73.144.22.2.in-addr.arpa udp
US 8.8.8.8:53 237.21.107.13.in-addr.arpa udp
US 8.8.8.8:53 0.159.190.20.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 45.33.20.235:80 www.aieov.com tcp
US 8.8.8.8:53 55.36.223.20.in-addr.arpa udp
US 8.8.8.8:53 235.20.33.45.in-addr.arpa udp
US 8.8.8.8:53 5isohu.com udp
US 45.33.20.235:80 www.aieov.com tcp
US 8.8.8.8:53 5isohu.com udp
US 45.33.20.235:80 www.aieov.com tcp
US 8.8.8.8:53 97.17.167.52.in-addr.arpa udp
US 8.8.8.8:53 www.microsoft.com udp
GB 95.100.245.144:80 www.microsoft.com tcp
US 8.8.8.8:53 144.245.100.95.in-addr.arpa udp
US 8.8.8.8:53 86.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 8.8.8.8:53 59.238.56.23.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 88.156.103.20.in-addr.arpa udp
US 8.8.8.8:53 48.229.111.52.in-addr.arpa udp
US 8.8.8.8:53 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/2256-0-0x0000000005000000-0x0000000005018000-memory.dmp

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

MD5 7574cf2c64f35161ab1292e2f532aabf
SHA1 14ba3fa927a06224dfe587014299e834def4644f
SHA256 de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085
SHA512 4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab

memory/2256-5-0x0000000010000000-0x0000000010030000-memory.dmp

memory/2256-8-0x0000000005000000-0x0000000005018000-memory.dmp

memory/2256-7-0x0000000005001000-0x0000000005002000-memory.dmp

\??\c:\temp\ext43230\hotfix.exe

MD5 83e844476b1efebd5b8e736d91e4da69
SHA1 b2810ce0757b8a02ffe3a49d07a2c626bfdbf191
SHA256 1d13837813f9f7649908f5aa628e1d836eae0f627507908e63bdde1ddcfc9b92
SHA512 e4aba7c52bc574324f9ad5d8d2d90d212de0613f4a8e7221f2b0126e90f32eaa90b660f1958d71fb1b0ab9106ac1b15e510d490c2dc3a5c984e9d6b6acda4a23

\??\c:\temp\ext43230\hotfix.inf

MD5 4b838a0d7b6fdae782470c93be1ed392
SHA1 92fccc3cc389b13aba0710f2a1a3a1282073eea6
SHA256 4c60925712c9cc19e2cd213db3466c5c7f466a667765934d3526cf3ced4e9608
SHA512 ab3241b8be4d83c3e0a46a6493452768769dc5d2127672250ad8e3c014956d00480f48ff0e04c42c432e7982c73ed1a68ec22d10be1f39cfa83895fe819407b2

C:\temp\ext43230\hotfix.exe.tmp

MD5 6c4268a40e1c1ca6f81963f536e9330d
SHA1 2b150b79101103f66afec5d76a419a5234e49bff
SHA256 c4eb1708c0edc6296cc717b917b93b6fefc3983f4e3bc394d0341f4e95658de9
SHA512 ed74b4544f0c9663f270469bf49000705ef2a0279e3e62de642d03ca937ee4a499f15f2247e0599d3283dfbc59d130c3212e4d53f8bda72f27c963c96b94743c

memory/2256-36-0x0000000005000000-0x0000000005018000-memory.dmp

memory/2256-37-0x0000000010000000-0x0000000010030000-memory.dmp

memory/2256-40-0x0000000005001000-0x0000000005002000-memory.dmp

memory/2256-41-0x0000000010000000-0x0000000010030000-memory.dmp

memory/2256-51-0x0000000010000000-0x0000000010030000-memory.dmp

memory/2256-52-0x0000000005000000-0x0000000005018000-memory.dmp