Malware Analysis Report

2025-06-16 02:04

Sample ID 240728-djz4vavbkp
Target b1949c307c6e69e315f9b21ea1005ea564d4492083b48e39bc39935986d4a1e9
SHA256 b1949c307c6e69e315f9b21ea1005ea564d4492083b48e39bc39935986d4a1e9
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

b1949c307c6e69e315f9b21ea1005ea564d4492083b48e39bc39935986d4a1e9

Threat Level: Known bad

The file b1949c307c6e69e315f9b21ea1005ea564d4492083b48e39bc39935986d4a1e9 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

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

2024-07-28 03:03

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-07-28 03:03

Reported

2024-07-28 03:06

Platform

win7-20240708-en

Max time kernel

145s

Max time network

124s

Command Line

"C:\Users\Admin\AppData\Local\Temp\b1949c307c6e69e315f9b21ea1005ea564d4492083b48e39bc39935986d4a1e9.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
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\b1949c307c6e69e315f9b21ea1005ea564d4492083b48e39bc39935986d4a1e9.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\b1949c307c6e69e315f9b21ea1005ea564d4492083b48e39bc39935986d4a1e9.exe N/A
File created \??\c:\program files\common files\system\symsrv.dll.000 C:\Users\Admin\AppData\Local\Temp\b1949c307c6e69e315f9b21ea1005ea564d4492083b48e39bc39935986d4a1e9.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\b1949c307c6e69e315f9b21ea1005ea564d4492083b48e39bc39935986d4a1e9.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\b1949c307c6e69e315f9b21ea1005ea564d4492083b48e39bc39935986d4a1e9.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\b1949c307c6e69e315f9b21ea1005ea564d4492083b48e39bc39935986d4a1e9.exe

"C:\Users\Admin\AppData\Local\Temp\b1949c307c6e69e315f9b21ea1005ea564d4492083b48e39bc39935986d4a1e9.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 45.33.2.79:80 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

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

MD5 7574cf2c64f35161ab1292e2f532aabf
SHA1 14ba3fa927a06224dfe587014299e834def4644f
SHA256 de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085
SHA512 4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab

memory/1812-4-0x0000000010000000-0x0000000010030000-memory.dmp

memory/1812-3-0x0000000000400000-0x0000000000540000-memory.dmp

memory/1812-6-0x0000000000400000-0x0000000000540000-memory.dmp

memory/1812-12-0x0000000010000000-0x0000000010030000-memory.dmp

memory/1812-14-0x0000000000400000-0x0000000000540000-memory.dmp

memory/1812-13-0x0000000000400000-0x0000000000540000-memory.dmp

memory/1812-18-0x0000000000400000-0x0000000000540000-memory.dmp

memory/1812-17-0x0000000010000000-0x0000000010030000-memory.dmp

memory/1812-20-0x0000000000400000-0x0000000000540000-memory.dmp

memory/1812-19-0x0000000010000000-0x0000000010030000-memory.dmp

memory/1812-21-0x0000000000400000-0x0000000000540000-memory.dmp

memory/1812-24-0x0000000010000000-0x0000000010030000-memory.dmp

memory/1812-25-0x0000000000400000-0x0000000000540000-memory.dmp

memory/1812-28-0x0000000000400000-0x0000000000540000-memory.dmp

memory/1812-30-0x0000000000400000-0x0000000000540000-memory.dmp

memory/1812-29-0x0000000010000000-0x0000000010030000-memory.dmp

memory/1812-31-0x0000000000400000-0x0000000000540000-memory.dmp

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

MD5 1130c911bf5db4b8f7cf9b6f4b457623
SHA1 48e734c4bc1a8b5399bff4954e54b268bde9d54c
SHA256 eba08cc8182f379392a97f542b350ea0dbbe5e4009472f35af20e3d857eafdf1
SHA512 94e2511ef2c53494c2aff0960266491ffc0e54e75185427d1ccedae27c286992c754ca94cbb0c9ea36e3f04cd4eb7f032c551cf2d4b309f292906303f1a75fa0

memory/1812-34-0x0000000000400000-0x0000000000540000-memory.dmp

memory/1812-35-0x0000000010000000-0x0000000010030000-memory.dmp

memory/1812-36-0x0000000000400000-0x0000000000540000-memory.dmp

memory/1812-39-0x0000000000400000-0x0000000000540000-memory.dmp

memory/1812-40-0x0000000010000000-0x0000000010030000-memory.dmp

memory/1812-41-0x0000000000400000-0x0000000000540000-memory.dmp

memory/1812-43-0x0000000000400000-0x0000000000540000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-07-28 03:03

Reported

2024-07-28 03:06

Platform

win10v2004-20240709-en

Max time kernel

145s

Max time network

142s

Command Line

"C:\Users\Admin\AppData\Local\Temp\b1949c307c6e69e315f9b21ea1005ea564d4492083b48e39bc39935986d4a1e9.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
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\b1949c307c6e69e315f9b21ea1005ea564d4492083b48e39bc39935986d4a1e9.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\b1949c307c6e69e315f9b21ea1005ea564d4492083b48e39bc39935986d4a1e9.exe N/A
File created \??\c:\program files\common files\system\symsrv.dll.000 C:\Users\Admin\AppData\Local\Temp\b1949c307c6e69e315f9b21ea1005ea564d4492083b48e39bc39935986d4a1e9.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\b1949c307c6e69e315f9b21ea1005ea564d4492083b48e39bc39935986d4a1e9.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\b1949c307c6e69e315f9b21ea1005ea564d4492083b48e39bc39935986d4a1e9.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\b1949c307c6e69e315f9b21ea1005ea564d4492083b48e39bc39935986d4a1e9.exe

"C:\Users\Admin\AppData\Local\Temp\b1949c307c6e69e315f9b21ea1005ea564d4492083b48e39bc39935986d4a1e9.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 104.219.191.52.in-addr.arpa udp
US 8.8.8.8:53 73.144.22.2.in-addr.arpa udp
US 8.8.8.8:53 72.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 5isohu.com udp
US 8.8.8.8:53 www.aieov.com udp
US 45.33.2.79:80 www.aieov.com tcp
US 8.8.8.8:53 79.2.33.45.in-addr.arpa udp
US 8.8.8.8:53 183.142.211.20.in-addr.arpa udp
US 8.8.8.8:53 5isohu.com udp
US 45.33.2.79:80 www.aieov.com tcp
US 45.33.2.79:80 www.aieov.com tcp
US 8.8.8.8:53 5isohu.com udp
US 8.8.8.8:53 217.106.137.52.in-addr.arpa udp
US 45.33.2.79:80 www.aieov.com tcp
US 8.8.8.8:53 5isohu.com udp
US 45.33.2.79:80 www.aieov.com tcp
US 8.8.8.8:53 183.59.114.20.in-addr.arpa udp
US 8.8.8.8:53 56.126.166.20.in-addr.arpa udp
US 8.8.8.8:53 5isohu.com udp
US 45.33.2.79:80 www.aieov.com tcp
US 8.8.8.8:53 147.142.123.92.in-addr.arpa udp
US 8.8.8.8:53 43.58.199.20.in-addr.arpa udp
US 8.8.8.8:53 14.227.111.52.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp

Files

memory/1624-0-0x0000000000400000-0x0000000000540000-memory.dmp

memory/1624-5-0x0000000010000000-0x0000000010030000-memory.dmp

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

MD5 7574cf2c64f35161ab1292e2f532aabf
SHA1 14ba3fa927a06224dfe587014299e834def4644f
SHA256 de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085
SHA512 4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab

memory/1624-6-0x000000000041C000-0x000000000041F000-memory.dmp

memory/1624-13-0x0000000010000000-0x0000000010030000-memory.dmp

memory/1624-14-0x0000000000400000-0x0000000000540000-memory.dmp

memory/1624-15-0x0000000000400000-0x0000000000540000-memory.dmp

memory/1624-18-0x0000000000400000-0x0000000000540000-memory.dmp

memory/1624-19-0x0000000000400000-0x0000000000540000-memory.dmp

memory/1624-20-0x0000000000400000-0x0000000000540000-memory.dmp

memory/1624-23-0x0000000010000000-0x0000000010030000-memory.dmp

memory/1624-24-0x0000000000400000-0x0000000000540000-memory.dmp

memory/1624-25-0x0000000010000000-0x0000000010030000-memory.dmp

memory/1624-26-0x0000000000400000-0x0000000000540000-memory.dmp

memory/1624-29-0x0000000000400000-0x0000000000540000-memory.dmp

memory/1624-30-0x0000000000400000-0x0000000000540000-memory.dmp

memory/1624-31-0x0000000000400000-0x0000000000540000-memory.dmp

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

MD5 1130c911bf5db4b8f7cf9b6f4b457623
SHA1 48e734c4bc1a8b5399bff4954e54b268bde9d54c
SHA256 eba08cc8182f379392a97f542b350ea0dbbe5e4009472f35af20e3d857eafdf1
SHA512 94e2511ef2c53494c2aff0960266491ffc0e54e75185427d1ccedae27c286992c754ca94cbb0c9ea36e3f04cd4eb7f032c551cf2d4b309f292906303f1a75fa0

memory/1624-34-0x0000000000400000-0x0000000000540000-memory.dmp

memory/1624-35-0x0000000000400000-0x0000000000540000-memory.dmp

memory/1624-36-0x0000000010000000-0x0000000010030000-memory.dmp

memory/1624-37-0x0000000000400000-0x0000000000540000-memory.dmp

memory/1624-41-0x0000000000400000-0x0000000000540000-memory.dmp

memory/1624-40-0x0000000000400000-0x0000000000540000-memory.dmp

memory/1624-42-0x0000000010000000-0x0000000010030000-memory.dmp

memory/1624-43-0x0000000000400000-0x0000000000540000-memory.dmp

memory/1624-44-0x0000000000400000-0x0000000000540000-memory.dmp

memory/1624-45-0x0000000000400000-0x0000000000540000-memory.dmp

memory/1624-47-0x0000000000400000-0x0000000000540000-memory.dmp

memory/1624-48-0x0000000000400000-0x0000000000540000-memory.dmp

memory/1624-50-0x0000000000400000-0x0000000000540000-memory.dmp

memory/1624-54-0x0000000010000000-0x0000000010030000-memory.dmp