Malware Analysis Report

2025-01-02 07:30

Sample ID 240816-hm3rcs1cpc
Target 2e239b558d678a4ea0d1f2b81d4c3ab0N.exe
SHA256 c18c1bc61bb5693601952bd9c199f6e278fefaad9e130882a6a3ed2216f7b320
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

c18c1bc61bb5693601952bd9c199f6e278fefaad9e130882a6a3ed2216f7b320

Threat Level: Known bad

The file 2e239b558d678a4ea0d1f2b81d4c3ab0N.exe was found to be: Known bad.

Malicious Activity Summary

floxif backdoor discovery trojan upx

Floxif, Floodfix

Detects Floxif payload

UPX packed file

Loads dropped DLL

ACProtect 1.3x - 1.4x DLL software

Enumerates connected drives

Drops file in System32 directory

Drops file in Program Files directory

Unsigned PE

System Location Discovery: System Language Discovery

Suspicious use of WriteProcessMemory

Suspicious use of AdjustPrivilegeToken

Suspicious behavior: EnumeratesProcesses

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-08-16 06:52

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-08-16 06:52

Reported

2024-08-16 06:54

Platform

win7-20240705-en

Max time kernel

112s

Max time network

53s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2e239b558d678a4ea0d1f2b81d4c3ab0N.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\2e239b558d678a4ea0d1f2b81d4c3ab0N.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) \??\e: C:\Users\Admin\AppData\Local\Temp\2e239b558d678a4ea0d1f2b81d4c3ab0N.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\2e239b558d678a4ea0d1f2b81d4c3ab0N.exe N/A
File created \??\c:\program files\common files\system\symsrv.dll.000 C:\Users\Admin\AppData\Local\Temp\2e239b558d678a4ea0d1f2b81d4c3ab0N.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\2e239b558d678a4ea0d1f2b81d4c3ab0N.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\2e239b558d678a4ea0d1f2b81d4c3ab0N.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\2e239b558d678a4ea0d1f2b81d4c3ab0N.exe

"C:\Users\Admin\AppData\Local\Temp\2e239b558d678a4ea0d1f2b81d4c3ab0N.exe"

C:\Windows\splwow64.exe

C:\Windows\splwow64.exe 12288

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 45.33.2.79:80 www.aieov.com tcp
US 45.33.2.79:80 www.aieov.com tcp
US 45.33.2.79:80 www.aieov.com tcp
US 45.33.2.79:80 www.aieov.com tcp
US 45.33.2.79:80 www.aieov.com tcp
US 45.33.2.79:80 www.aieov.com tcp

Files

memory/2524-3-0x0000000010000000-0x0000000010030000-memory.dmp

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

MD5 7574cf2c64f35161ab1292e2f532aabf
SHA1 14ba3fa927a06224dfe587014299e834def4644f
SHA256 de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085
SHA512 4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab

memory/2524-13-0x0000000010000000-0x0000000010030000-memory.dmp

memory/2524-11-0x0000000000400000-0x0000000000AEF000-memory.dmp

memory/2524-17-0x0000000010000000-0x0000000010030000-memory.dmp

memory/2524-16-0x0000000000400000-0x0000000000AEF000-memory.dmp

memory/2524-21-0x0000000010000000-0x0000000010030000-memory.dmp

memory/2524-20-0x0000000000400000-0x0000000000AEF000-memory.dmp

memory/2524-25-0x0000000010000000-0x0000000010030000-memory.dmp

memory/2524-24-0x0000000000400000-0x0000000000AEF000-memory.dmp

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

MD5 1130c911bf5db4b8f7cf9b6f4b457623
SHA1 48e734c4bc1a8b5399bff4954e54b268bde9d54c
SHA256 eba08cc8182f379392a97f542b350ea0dbbe5e4009472f35af20e3d857eafdf1
SHA512 94e2511ef2c53494c2aff0960266491ffc0e54e75185427d1ccedae27c286992c754ca94cbb0c9ea36e3f04cd4eb7f032c551cf2d4b309f292906303f1a75fa0

memory/2524-31-0x0000000010000000-0x0000000010030000-memory.dmp

memory/2524-30-0x0000000000400000-0x0000000000AEF000-memory.dmp

memory/2524-33-0x0000000010000000-0x0000000010030000-memory.dmp

memory/2524-32-0x0000000000400000-0x0000000000AEF000-memory.dmp

memory/2524-34-0x0000000000400000-0x0000000000AEF000-memory.dmp

memory/2524-36-0x0000000000400000-0x0000000000AEF000-memory.dmp

memory/2524-38-0x0000000000400000-0x0000000000AEF000-memory.dmp

memory/2524-40-0x0000000000400000-0x0000000000AEF000-memory.dmp

memory/2524-42-0x0000000000400000-0x0000000000AEF000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-08-16 06:52

Reported

2024-08-16 06:54

Platform

win10v2004-20240802-en

Max time kernel

116s

Max time network

102s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2e239b558d678a4ea0d1f2b81d4c3ab0N.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\2e239b558d678a4ea0d1f2b81d4c3ab0N.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\2e239b558d678a4ea0d1f2b81d4c3ab0N.exe N/A

Drops file in System32 directory

Description Indicator Process Target
File opened for modification C:\Windows\system32\FxsTmp\fxsB352.tmp C:\Windows\splwow64.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\2e239b558d678a4ea0d1f2b81d4c3ab0N.exe N/A
File created \??\c:\program files\common files\system\symsrv.dll.000 C:\Users\Admin\AppData\Local\Temp\2e239b558d678a4ea0d1f2b81d4c3ab0N.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\2e239b558d678a4ea0d1f2b81d4c3ab0N.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\2e239b558d678a4ea0d1f2b81d4c3ab0N.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2216 wrote to memory of 3008 N/A C:\Users\Admin\AppData\Local\Temp\2e239b558d678a4ea0d1f2b81d4c3ab0N.exe C:\Windows\splwow64.exe
PID 2216 wrote to memory of 3008 N/A C:\Users\Admin\AppData\Local\Temp\2e239b558d678a4ea0d1f2b81d4c3ab0N.exe C:\Windows\splwow64.exe

Processes

C:\Users\Admin\AppData\Local\Temp\2e239b558d678a4ea0d1f2b81d4c3ab0N.exe

"C:\Users\Admin\AppData\Local\Temp\2e239b558d678a4ea0d1f2b81d4c3ab0N.exe"

C:\Windows\splwow64.exe

C:\Windows\splwow64.exe 12288

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 104.219.191.52.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 8.8.8.8:53 71.31.126.40.in-addr.arpa udp
US 8.8.8.8:53 5isohu.com udp
US 8.8.8.8:53 43.58.199.20.in-addr.arpa udp
US 8.8.8.8:53 www.aieov.com udp
US 45.33.23.183:80 www.aieov.com tcp
US 8.8.8.8:53 183.23.33.45.in-addr.arpa udp
US 8.8.8.8:53 5isohu.com udp
US 45.33.23.183:80 www.aieov.com tcp
US 45.33.23.183:80 www.aieov.com tcp
US 8.8.8.8:53 5isohu.com udp
US 8.8.8.8:53 196.249.167.52.in-addr.arpa udp
US 45.33.23.183:80 www.aieov.com tcp
US 8.8.8.8:53 5isohu.com udp
US 45.33.23.183:80 www.aieov.com tcp
US 8.8.8.8:53 5isohu.com udp
US 45.33.23.183:80 www.aieov.com tcp
US 8.8.8.8:53 86.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 56.126.166.20.in-addr.arpa udp
US 8.8.8.8:53 43.229.111.52.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

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

MD5 7574cf2c64f35161ab1292e2f532aabf
SHA1 14ba3fa927a06224dfe587014299e834def4644f
SHA256 de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085
SHA512 4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab

memory/2216-4-0x0000000010000000-0x0000000010030000-memory.dmp

memory/2216-16-0x0000000010000000-0x0000000010030000-memory.dmp

memory/2216-14-0x0000000000400000-0x0000000000AEF000-memory.dmp

memory/2216-22-0x0000000010000000-0x0000000010030000-memory.dmp

memory/2216-21-0x0000000000400000-0x0000000000AEF000-memory.dmp

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

MD5 1130c911bf5db4b8f7cf9b6f4b457623
SHA1 48e734c4bc1a8b5399bff4954e54b268bde9d54c
SHA256 eba08cc8182f379392a97f542b350ea0dbbe5e4009472f35af20e3d857eafdf1
SHA512 94e2511ef2c53494c2aff0960266491ffc0e54e75185427d1ccedae27c286992c754ca94cbb0c9ea36e3f04cd4eb7f032c551cf2d4b309f292906303f1a75fa0

memory/2216-28-0x0000000010000000-0x0000000010030000-memory.dmp

memory/2216-27-0x0000000000400000-0x0000000000AEF000-memory.dmp

memory/2216-29-0x0000000000400000-0x0000000000AEF000-memory.dmp

memory/2216-31-0x0000000000400000-0x0000000000AEF000-memory.dmp

memory/2216-33-0x0000000000400000-0x0000000000AEF000-memory.dmp

memory/2216-35-0x0000000000400000-0x0000000000AEF000-memory.dmp

memory/2216-37-0x0000000000400000-0x0000000000AEF000-memory.dmp

memory/2216-40-0x0000000010000000-0x0000000010030000-memory.dmp

memory/2216-39-0x0000000000400000-0x0000000000AEF000-memory.dmp

memory/2216-41-0x0000000000400000-0x0000000000AEF000-memory.dmp

memory/2216-43-0x0000000000400000-0x0000000000AEF000-memory.dmp