Malware Analysis Report

2025-01-02 07:31

Sample ID 240816-edxl7stejg
Target 79e42e8d362b0753459ba28408c236b0N.exe
SHA256 7826e53099bb1234eb2acd3f352378628013b94cc1a059169dcd8339d102075d
Tags
floxif backdoor discovery evasion 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

7826e53099bb1234eb2acd3f352378628013b94cc1a059169dcd8339d102075d

Threat Level: Known bad

The file 79e42e8d362b0753459ba28408c236b0N.exe was found to be: Known bad.

Malicious Activity Summary

floxif backdoor discovery evasion trojan upx

Floxif, Floodfix

Detects Floxif payload

Identifies Wine through registry keys

ACProtect 1.3x - 1.4x DLL software

Loads dropped DLL

UPX packed file

Enumerates connected drives

Drops file in Program Files directory

Unsigned PE

System Location Discovery: System Language Discovery

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-08-16 03:50

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-08-16 03:50

Reported

2024-08-16 03:52

Platform

win7-20240704-en

Max time kernel

118s

Max time network

118s

Command Line

"C:\Users\Admin\AppData\Local\Temp\79e42e8d362b0753459ba28408c236b0N.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

Identifies Wine through registry keys

evasion
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\Software\Wow6432Node\Wine C:\Users\Admin\AppData\Local\Temp\79e42e8d362b0753459ba28408c236b0N.exe N/A
Key opened \REGISTRY\USER\S-1-5-21-3294248377-1418901787-4083263181-1000\Software\Wine C:\Users\Admin\AppData\Local\Temp\79e42e8d362b0753459ba28408c236b0N.exe N/A

Loads dropped DLL

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\79e42e8d362b0753459ba28408c236b0N.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\79e42e8d362b0753459ba28408c236b0N.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\79e42e8d362b0753459ba28408c236b0N.exe N/A
File created C:\Program Files\Common Files\System\symsrv.dll C:\Users\Admin\AppData\Local\Temp\79e42e8d362b0753459ba28408c236b0N.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\79e42e8d362b0753459ba28408c236b0N.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\79e42e8d362b0753459ba28408c236b0N.exe N/A
Token: SeManageVolumePrivilege N/A C:\Users\Admin\AppData\Local\Temp\79e42e8d362b0753459ba28408c236b0N.exe N/A
Token: SeShutdownPrivilege N/A C:\Users\Admin\AppData\Local\Temp\79e42e8d362b0753459ba28408c236b0N.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\79e42e8d362b0753459ba28408c236b0N.exe

"C:\Users\Admin\AppData\Local\Temp\79e42e8d362b0753459ba28408c236b0N.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 router.bittorrent.com udp
US 8.8.8.8:53 router.utorrent.com udp
US 8.8.8.8:53 i-50.b-000.xyz.bench.utorrent.com udp
US 8.8.8.8:53 i-50.b-000.xyz.bench.utorrent.com udp
US 8.8.8.8:53 i-50.b-000.xyz.bench.utorrent.com udp
US 8.8.8.8:53 i-50.b-000.xyz.bench.utorrent.com udp
US 8.8.8.8:53 i-50.b-000.xyz.bench.utorrent.com udp
US 8.8.8.8:53 i-50.b-000.xyz.bench.utorrent.com udp
US 8.8.8.8:53 i-50.b-000.xyz.bench.utorrent.com udp
US 8.8.8.8:53 i-50.b-000.xyz.bench.utorrent.com udp
US 8.8.8.8:53 i-50.b-000.xyz.bench.utorrent.com udp
US 8.8.8.8:53 i-50.b-000.xyz.bench.utorrent.com udp
US 8.8.8.8:53 i-50.b-000.xyz.bench.utorrent.com udp
US 8.8.8.8:53 i-50.b-000.xyz.bench.utorrent.com udp
US 8.8.8.8:53 i-50.b-000.xyz.bench.utorrent.com udp
US 44.212.239.146:80 i-50.b-000.xyz.bench.utorrent.com tcp
US 44.220.102.186:80 i-50.b-000.xyz.bench.utorrent.com tcp
US 44.208.254.149:80 i-50.b-000.xyz.bench.utorrent.com tcp
US 44.220.102.186:80 i-50.b-000.xyz.bench.utorrent.com tcp
US 52.23.33.145:80 i-50.b-000.xyz.bench.utorrent.com tcp
US 52.20.148.213:80 i-50.b-000.xyz.bench.utorrent.com tcp
US 52.71.66.144:80 i-50.b-000.xyz.bench.utorrent.com tcp
US 52.71.66.144:80 i-50.b-000.xyz.bench.utorrent.com tcp
US 44.213.182.226:80 i-50.b-000.xyz.bench.utorrent.com tcp
US 52.0.74.235:80 i-50.b-000.xyz.bench.utorrent.com tcp
US 44.220.102.186:80 i-50.b-000.xyz.bench.utorrent.com tcp
US 52.203.247.66:80 i-50.b-000.xyz.bench.utorrent.com tcp
US 52.203.247.66:80 i-50.b-000.xyz.bench.utorrent.com tcp
US 8.8.8.8:53 i-21.b-46096.ut.bench.utorrent.com udp
US 44.196.114.25:80 i-21.b-46096.ut.bench.utorrent.com tcp
US 44.196.114.25:80 i-21.b-46096.ut.bench.utorrent.com tcp
US 44.196.114.25:80 i-21.b-46096.ut.bench.utorrent.com tcp
US 8.8.8.8:53 5isohu.com udp
US 8.8.8.8:53 update.utorrent.li udp
IS 82.221.103.246:80 update.utorrent.li tcp
US 8.8.8.8:53 www.aieov.com udp
US 96.126.123.244:80 www.aieov.com tcp
US 96.126.123.244:80 www.aieov.com tcp
US 96.126.123.244:80 www.aieov.com tcp
US 8.8.8.8:53 i-41.b-46096.bench.utorrent.com udp
US 52.0.74.235:80 i-41.b-46096.bench.utorrent.com tcp
US 96.126.123.244:80 www.aieov.com tcp
US 96.126.123.244:80 www.aieov.com tcp
US 96.126.123.244:80 www.aieov.com tcp

Files

memory/1668-0-0x0000000000400000-0x00000000008E6000-memory.dmp

memory/1668-4-0x0000000010000000-0x0000000010030000-memory.dmp

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

MD5 7574cf2c64f35161ab1292e2f532aabf
SHA1 14ba3fa927a06224dfe587014299e834def4644f
SHA256 de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085
SHA512 4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab

memory/1668-6-0x0000000000575000-0x0000000000578000-memory.dmp

C:\Users\Admin\AppData\Roaming\uTorrent\settings.dat.old

MD5 a1c55ee11fde5f3a91b754dc882e7258
SHA1 450683b90102177dd05b96fdfee4f85c1ca4cf40
SHA256 80bdabc857304544101d74b91aaa04dc0fb93ff8603f108b633bf3c13cbd3874
SHA512 aa0f73b34ef00be8b34e252a376bf329b7066ee569638eef311960aede1dae7a52b394dff2f21ed7f6c050b1bb2d2d37b90fa1f3e02a803bfafa04c9f751acce

C:\Users\Admin\AppData\Roaming\uTorrent\toolbar.benc

MD5 1cda5503e74f672c3affe109b6bde393
SHA1 514283a5b5cf53c218ce4d53b1a8d38d4f2a9667
SHA256 ffe5bcba6dac90958524e5b4ba06e0a03707a46cbf7d92af505ca77a61dc8967
SHA512 fa5f127bfb79564a4f37dbf4fdf4a044b916d12caebbcce1347901467dfd89bc06c07a754fcc4354db5fd0c2246c313b30a9542fb2aadebcc3cd2d8d4ef67066

memory/1668-34-0x0000000000400000-0x00000000008E6000-memory.dmp

memory/1668-35-0x0000000010000000-0x0000000010030000-memory.dmp

memory/1668-36-0x0000000000400000-0x00000000008E6000-memory.dmp

memory/1668-37-0x0000000010000000-0x0000000010030000-memory.dmp

memory/1668-40-0x0000000000400000-0x00000000008E6000-memory.dmp

memory/1668-41-0x0000000000400000-0x00000000008E6000-memory.dmp

memory/1668-42-0x0000000000400000-0x00000000008E6000-memory.dmp

memory/1668-43-0x0000000000400000-0x00000000008E6000-memory.dmp

memory/1668-44-0x0000000010000000-0x0000000010030000-memory.dmp

memory/1668-52-0x0000000000400000-0x00000000008E6000-memory.dmp

memory/1668-53-0x0000000000400000-0x00000000008E6000-memory.dmp

memory/1668-54-0x0000000010000000-0x0000000010030000-memory.dmp

memory/1668-57-0x0000000010000000-0x0000000010030000-memory.dmp

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

MD5 1130c911bf5db4b8f7cf9b6f4b457623
SHA1 48e734c4bc1a8b5399bff4954e54b268bde9d54c
SHA256 eba08cc8182f379392a97f542b350ea0dbbe5e4009472f35af20e3d857eafdf1
SHA512 94e2511ef2c53494c2aff0960266491ffc0e54e75185427d1ccedae27c286992c754ca94cbb0c9ea36e3f04cd4eb7f032c551cf2d4b309f292906303f1a75fa0

memory/1668-60-0x0000000010000000-0x0000000010030000-memory.dmp

memory/1668-63-0x0000000010000000-0x0000000010030000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-08-16 03:50

Reported

2024-08-16 03:52

Platform

win10v2004-20240802-en

Max time kernel

115s

Max time network

101s

Command Line

"C:\Users\Admin\AppData\Local\Temp\79e42e8d362b0753459ba28408c236b0N.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

Identifies Wine through registry keys

evasion
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\Software\WOW6432Node\Wine C:\Users\Admin\AppData\Local\Temp\79e42e8d362b0753459ba28408c236b0N.exe N/A
Key opened \REGISTRY\USER\S-1-5-21-523280732-2327480845-3730041215-1000\Software\Wine C:\Users\Admin\AppData\Local\Temp\79e42e8d362b0753459ba28408c236b0N.exe N/A

Loads dropped DLL

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\79e42e8d362b0753459ba28408c236b0N.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

Enumerates connected drives

Description Indicator Process Target
File opened (read-only) \??\e: C:\Users\Admin\AppData\Local\Temp\79e42e8d362b0753459ba28408c236b0N.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\79e42e8d362b0753459ba28408c236b0N.exe N/A
File created \??\c:\program files\common files\system\symsrv.dll.000 C:\Users\Admin\AppData\Local\Temp\79e42e8d362b0753459ba28408c236b0N.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\79e42e8d362b0753459ba28408c236b0N.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\79e42e8d362b0753459ba28408c236b0N.exe N/A
Token: SeManageVolumePrivilege N/A C:\Users\Admin\AppData\Local\Temp\79e42e8d362b0753459ba28408c236b0N.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\79e42e8d362b0753459ba28408c236b0N.exe

"C:\Users\Admin\AppData\Local\Temp\79e42e8d362b0753459ba28408c236b0N.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 router.bittorrent.com udp
US 8.8.8.8:53 router.utorrent.com udp
US 8.8.8.8:53 i-50.b-000.xyz.bench.utorrent.com udp
US 44.196.114.25:80 i-50.b-000.xyz.bench.utorrent.com tcp
US 44.196.114.25:80 i-50.b-000.xyz.bench.utorrent.com tcp
US 44.196.114.25:80 i-50.b-000.xyz.bench.utorrent.com tcp
US 44.196.114.25:80 i-50.b-000.xyz.bench.utorrent.com tcp
US 44.196.114.25:80 i-50.b-000.xyz.bench.utorrent.com tcp
US 44.196.114.25:80 i-50.b-000.xyz.bench.utorrent.com tcp
US 44.196.114.25:80 i-50.b-000.xyz.bench.utorrent.com tcp
US 44.196.114.25:80 i-50.b-000.xyz.bench.utorrent.com tcp
US 44.196.114.25:80 i-50.b-000.xyz.bench.utorrent.com tcp
US 44.196.114.25:80 i-50.b-000.xyz.bench.utorrent.com tcp
US 44.196.114.25:80 i-50.b-000.xyz.bench.utorrent.com tcp
US 44.196.114.25:80 i-50.b-000.xyz.bench.utorrent.com tcp
US 44.196.114.25:80 i-50.b-000.xyz.bench.utorrent.com tcp
US 8.8.8.8:53 g.bing.com udp
US 204.79.197.237:443 g.bing.com tcp
US 8.8.8.8:53 217.106.137.52.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 8.8.8.8:53 25.114.196.44.in-addr.arpa udp
US 8.8.8.8:53 237.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 5isohu.com udp
US 8.8.8.8:53 i-21.b-46096.ut.bench.utorrent.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 73.159.190.20.in-addr.arpa udp
US 52.5.54.168:80 i-21.b-46096.ut.bench.utorrent.com tcp
US 52.5.54.168:80 i-21.b-46096.ut.bench.utorrent.com tcp
US 52.5.54.168:80 i-21.b-46096.ut.bench.utorrent.com tcp
US 8.8.8.8:53 88.156.103.20.in-addr.arpa udp
US 8.8.8.8:53 97.17.167.52.in-addr.arpa udp
US 8.8.8.8:53 44.18.33.45.in-addr.arpa udp
US 8.8.8.8:53 168.54.5.52.in-addr.arpa udp
US 8.8.8.8:53 update.utorrent.li udp
IS 82.221.103.245:80 update.utorrent.li tcp
US 8.8.8.8:53 245.103.221.82.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 5isohu.com udp
US 45.33.18.44:80 www.aieov.com tcp
US 45.33.18.44:80 www.aieov.com tcp
US 8.8.8.8:53 5isohu.com udp
US 8.8.8.8:53 26.165.165.52.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 43.58.199.20.in-addr.arpa udp
US 52.111.229.43:443 tcp
US 8.8.8.8:53 29.243.111.52.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
US 8.8.8.8:53 10.28.171.150.in-addr.arpa udp

Files

memory/3308-0-0x0000000000400000-0x00000000008E6000-memory.dmp

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

MD5 7574cf2c64f35161ab1292e2f532aabf
SHA1 14ba3fa927a06224dfe587014299e834def4644f
SHA256 de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085
SHA512 4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab

memory/3308-4-0x0000000010000000-0x0000000010030000-memory.dmp

memory/3308-6-0x0000000000575000-0x0000000000578000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\A1D26E2\8397118CCEC.tmp

MD5 8139aa55afd3bc05502277c2c38c36f5
SHA1 aa02bea9559cb8bb9a3380506ea554b07347ac95
SHA256 0e71b0b2be14ecec08c544af6d25eb67cba5ce2a268b0667d1e64970fe36bfd5
SHA512 e7f960253e980e4fea3cf622603c3a1fdad7e27c9d16cb96dc270ec1957f228232a82a30c5e84f0109ad0d6c3500c157fb6b99d7d25f13941b5f3014aca3f048

C:\Users\Admin\AppData\Roaming\uTorrent\settings.dat.old

MD5 ab52722a63b28c30943ac3e2f9aa9b57
SHA1 88c2aa7ad894386e838b0b96cefe164e010735ab
SHA256 9f682be01af8c1641bfdf08fa91f05c75ee4b4d02ea38a2fe24d5dd55caf8c7b
SHA512 c000a25d39c485914f94bf30b81b108c5500e762bdcc1b39eae7f7cdaa25a5ec170befa1ae491321c799d4d3cdf9a79c0599c343fa41d043fc9caad644886750

memory/3308-31-0x0000000000400000-0x00000000008E6000-memory.dmp

C:\Users\Admin\AppData\Roaming\uTorrent\toolbar.benc.new

MD5 1cda5503e74f672c3affe109b6bde393
SHA1 514283a5b5cf53c218ce4d53b1a8d38d4f2a9667
SHA256 ffe5bcba6dac90958524e5b4ba06e0a03707a46cbf7d92af505ca77a61dc8967
SHA512 fa5f127bfb79564a4f37dbf4fdf4a044b916d12caebbcce1347901467dfd89bc06c07a754fcc4354db5fd0c2246c313b30a9542fb2aadebcc3cd2d8d4ef67066

memory/3308-40-0x0000000000400000-0x00000000008E6000-memory.dmp

memory/3308-41-0x0000000010000000-0x0000000010030000-memory.dmp

memory/3308-42-0x0000000010000000-0x0000000010030000-memory.dmp

memory/3308-43-0x0000000000400000-0x00000000008E6000-memory.dmp

memory/3308-44-0x0000000000400000-0x00000000008E6000-memory.dmp

memory/3308-45-0x0000000000400000-0x00000000008E6000-memory.dmp

memory/3308-48-0x0000000000400000-0x00000000008E6000-memory.dmp

memory/3308-49-0x0000000000400000-0x00000000008E6000-memory.dmp

memory/3308-50-0x0000000000400000-0x00000000008E6000-memory.dmp

memory/3308-53-0x0000000000400000-0x00000000008E6000-memory.dmp

memory/3308-54-0x0000000000400000-0x00000000008E6000-memory.dmp

memory/3308-55-0x0000000010000000-0x0000000010030000-memory.dmp

memory/3308-56-0x0000000000400000-0x00000000008E6000-memory.dmp

memory/3308-57-0x0000000000400000-0x00000000008E6000-memory.dmp

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

MD5 1130c911bf5db4b8f7cf9b6f4b457623
SHA1 48e734c4bc1a8b5399bff4954e54b268bde9d54c
SHA256 eba08cc8182f379392a97f542b350ea0dbbe5e4009472f35af20e3d857eafdf1
SHA512 94e2511ef2c53494c2aff0960266491ffc0e54e75185427d1ccedae27c286992c754ca94cbb0c9ea36e3f04cd4eb7f032c551cf2d4b309f292906303f1a75fa0

memory/3308-60-0x0000000000400000-0x00000000008E6000-memory.dmp

memory/3308-61-0x0000000000400000-0x00000000008E6000-memory.dmp

memory/3308-62-0x0000000000400000-0x00000000008E6000-memory.dmp

memory/3308-65-0x0000000000400000-0x00000000008E6000-memory.dmp

memory/3308-66-0x0000000000400000-0x00000000008E6000-memory.dmp

memory/3308-67-0x0000000010000000-0x0000000010030000-memory.dmp

memory/3308-68-0x0000000000400000-0x00000000008E6000-memory.dmp

memory/3308-69-0x0000000000400000-0x00000000008E6000-memory.dmp

memory/3308-70-0x0000000000400000-0x00000000008E6000-memory.dmp

memory/3308-76-0x0000000010000000-0x0000000010030000-memory.dmp