Malware Analysis Report

2024-12-08 02:42

Sample ID 240912-qx34waxbkb
Target a93f9848f15636aae5378897d928b4c0N
SHA256 1abad78076661f9d2f2cb2940fe3446a1a3e69426575c4a7e945809b69eaac07
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: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

1abad78076661f9d2f2cb2940fe3446a1a3e69426575c4a7e945809b69eaac07

Threat Level: Known bad

The file a93f9848f15636aae5378897d928b4c0N 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

Enumerates physical storage devices

System Location Discovery: System Language Discovery

Unsigned PE

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-09-12 13:39

Signatures

Unsigned PE

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

Analysis: behavioral2

Detonation Overview

Submitted

2024-09-12 13:39

Reported

2024-09-12 13:41

Platform

win10v2004-20240802-en

Max time kernel

113s

Max time network

118s

Command Line

"C:\Users\Admin\AppData\Local\Temp\a93f9848f15636aae5378897d928b4c0N.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) \??\B: C:\Users\Admin\AppData\Local\Temp\a93f9848f15636aae5378897d928b4c0N.exe N/A
File opened (read-only) \??\e: C:\Users\Admin\AppData\Local\Temp\a93f9848f15636aae5378897d928b4c0N.exe N/A
File opened (read-only) \??\A: C:\Users\Admin\AppData\Local\Temp\a93f9848f15636aae5378897d928b4c0N.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\a93f9848f15636aae5378897d928b4c0N.exe N/A
File created \??\c:\program files\common files\system\symsrv.dll.000 C:\Users\Admin\AppData\Local\Temp\a93f9848f15636aae5378897d928b4c0N.exe N/A

Enumerates physical storage devices

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\a93f9848f15636aae5378897d928b4c0N.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\a93f9848f15636aae5378897d928b4c0N.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\a93f9848f15636aae5378897d928b4c0N.exe

"C:\Users\Admin\AppData\Local\Temp\a93f9848f15636aae5378897d928b4c0N.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 58.55.71.13.in-addr.arpa udp
US 8.8.8.8:53 81.144.22.2.in-addr.arpa udp
US 8.8.8.8:53 5isohu.com udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa 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 44.18.33.45.in-addr.arpa udp
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 8.8.8.8:53 183.59.114.20.in-addr.arpa udp
US 173.255.194.134:80 www.aieov.com tcp
US 8.8.8.8:53 5isohu.com udp
US 8.8.8.8:53 134.194.255.173.in-addr.arpa udp
US 173.255.194.134:80 www.aieov.com tcp
US 8.8.8.8:53 5isohu.com udp
US 173.255.194.134:80 www.aieov.com tcp
US 8.8.8.8:53 5isohu.com udp
US 173.255.194.134:80 www.aieov.com tcp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp
US 8.8.8.8:53 22.236.111.52.in-addr.arpa udp
US 8.8.8.8:53 73.144.22.2.in-addr.arpa udp
US 8.8.8.8:53 28.118.140.52.in-addr.arpa udp
US 8.8.8.8:53 5isohu.com udp

Files

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

MD5 7574cf2c64f35161ab1292e2f532aabf
SHA1 14ba3fa927a06224dfe587014299e834def4644f
SHA256 de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085
SHA512 4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab

memory/640-4-0x0000000010000000-0x0000000010030000-memory.dmp

memory/640-7-0x0000000000404000-0x0000000000407000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\~vis0000\vise32ex.dll

MD5 db798587868984eb838a71338f6ffe53
SHA1 c9fef0b8e6806137f29beb8c0eae04f1c5bb8c39
SHA256 6d4209a51dedb0aedcdfd5cbed6fc80dbc34b51cd1dc176d788f07b5cdf06642
SHA512 1e6f4ce4156693f9f9a8f70b8b9ff5080a27ac903929ae7aefd277c455d088aaf6b19ddc1edc131eb552eada877462829473885804df7f9246d412754d098c58

memory/640-16-0x0000000002C90000-0x0000000002D0F000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\~vis0000\English.vlg

MD5 707e3b6418526ed6729deb4a1307f1f2
SHA1 521a175e2e18ad316c8fbf25aa35c35dbf449668
SHA256 75081f741b450b8049d3a0106121516745bba675681fb490e78b7978238258d5
SHA512 cbf15467cbd0797a8ec781ce8fcae416c9dd30db052e32c85aa717ec955e24f5592ab937c2f8b82e7cf862c09a4a5d767808b56000bf3942da58c457a3fbcc86

C:\Users\Admin\AppData\Local\Temp\~vis0000\vise32ex.dll.tmp

MD5 c4b0478a0a373efd040d4ff4ddde5f90
SHA1 5783fe747fc5c2b9b21603e028ef15ba873a2a41
SHA256 53e19e235a079e0cc62bf5d89ab16ecfd80531b89ece22b2456b97291c240c15
SHA512 4c8fb587b272529626ff18181026374e423585f51d03ccba9f5902ab164824c3497b9b33793fdf27cba85f01bae1d87a9a464be1b53bd6ebeed0efb0d6722556

memory/640-76-0x0000000000400000-0x0000000000412000-memory.dmp

memory/640-79-0x0000000010000000-0x0000000010030000-memory.dmp

memory/640-81-0x0000000002C90000-0x0000000002D0F000-memory.dmp

memory/640-80-0x0000000010000000-0x0000000010030000-memory.dmp

memory/640-82-0x0000000010000000-0x0000000010030000-memory.dmp

memory/640-90-0x0000000010000000-0x0000000010030000-memory.dmp

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

MD5 1130c911bf5db4b8f7cf9b6f4b457623
SHA1 48e734c4bc1a8b5399bff4954e54b268bde9d54c
SHA256 eba08cc8182f379392a97f542b350ea0dbbe5e4009472f35af20e3d857eafdf1
SHA512 94e2511ef2c53494c2aff0960266491ffc0e54e75185427d1ccedae27c286992c754ca94cbb0c9ea36e3f04cd4eb7f032c551cf2d4b309f292906303f1a75fa0

memory/640-96-0x0000000010000000-0x0000000010030000-memory.dmp

memory/640-98-0x0000000010000000-0x0000000010030000-memory.dmp

Analysis: behavioral1

Detonation Overview

Submitted

2024-09-12 13:39

Reported

2024-09-12 13:41

Platform

win7-20240903-en

Max time kernel

119s

Max time network

17s

Command Line

"C:\Users\Admin\AppData\Local\Temp\a93f9848f15636aae5378897d928b4c0N.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

Loads dropped DLL

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\a93f9848f15636aae5378897d928b4c0N.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

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\a93f9848f15636aae5378897d928b4c0N.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\a93f9848f15636aae5378897d928b4c0N.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\a93f9848f15636aae5378897d928b4c0N.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\a93f9848f15636aae5378897d928b4c0N.exe

"C:\Users\Admin\AppData\Local\Temp\a93f9848f15636aae5378897d928b4c0N.exe"

Network

N/A

Files

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

MD5 7574cf2c64f35161ab1292e2f532aabf
SHA1 14ba3fa927a06224dfe587014299e834def4644f
SHA256 de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085
SHA512 4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab

memory/3008-3-0x0000000010000000-0x0000000010030000-memory.dmp

memory/3008-5-0x0000000010000000-0x0000000010030000-memory.dmp