Malware Analysis Report

2024-12-08 02:43

Sample ID 240817-nx7e7awhqk
Target 8cf2d659fba0560812bc1419a3248df0N.exe
SHA256 da7a55b1f37d5370a52d564a24251fa93e01fed4360f9ac3f9a0229107e3c62f
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

da7a55b1f37d5370a52d564a24251fa93e01fed4360f9ac3f9a0229107e3c62f

Threat Level: Known bad

The file 8cf2d659fba0560812bc1419a3248df0N.exe 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

Loads dropped DLL

UPX packed file

ACProtect 1.3x - 1.4x DLL software

Checks computer location settings

Executes dropped EXE

Enumerates connected drives

Drops file in Program Files directory

Program crash

System Location Discovery: System Language Discovery

Enumerates physical storage devices

Suspicious use of SetWindowsHookEx

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

Suspicious behavior: EnumeratesProcesses

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-08-17 11:47

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-08-17 11:47

Reported

2024-08-17 11:49

Platform

win7-20240708-en

Max time kernel

19s

Max time network

16s

Command Line

"C:\Users\Admin\AppData\Local\Temp\8cf2d659fba0560812bc1419a3248df0N.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

Enumerates connected drives

Description Indicator Process Target
File opened (read-only) \??\e: C:\Users\Admin\AppData\Local\Temp\8cf2d659fba0560812bc1419a3248df0N.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\8cf2d659fba0560812bc1419a3248df0N.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\8cf2d659fba0560812bc1419a3248df0N.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\8cf2d659fba0560812bc1419a3248df0N.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\8cf2d659fba0560812bc1419a3248df0N.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\8cf2d659fba0560812bc1419a3248df0N.exe

"C:\Users\Admin\AppData\Local\Temp\8cf2d659fba0560812bc1419a3248df0N.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 45.33.20.235:80 www.aieov.com tcp

Files

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

MD5 7574cf2c64f35161ab1292e2f532aabf
SHA1 14ba3fa927a06224dfe587014299e834def4644f
SHA256 de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085
SHA512 4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab

memory/2292-3-0x0000000010000000-0x0000000010030000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\{BB40D48E-B214-4AB1-B018-705C72C17F19}\WhaleSetup.exe

MD5 fb4700387ec4a35d8f3eef8226da998a
SHA1 8f1b993a908dc3ba9316af2cbb82bdc7fbf51297
SHA256 3c9051b9eb15946a907c16f1aa3d1b1c50519da83e165649a641700c2d9fc555
SHA512 73791d59096587396529f3aaaf9b39a678d738ebda9e09e59c414418154ca8b1e6637c5192616f3a027dadb952c425a3e7e6dcadc69df11b0c970bb5d1e1a4ab

\Users\Admin\AppData\Local\Temp\{BB40D48E-B214-4AB1-B018-705C72C17F19}\WhaleSetup.exe.tmp

MD5 f4a7a6737264722d95ac6299065472ff
SHA1 ed78c302f2c7a47b20054da04100ebda5243eb17
SHA256 a1fa39728724dc29c9136e59ca3297dde17359a83ea22128cbad647f0306b6a8
SHA512 58fa9ec35844a65ab4f2c1c1106987795605859fd19e12ba486e26ff22bbbdbbce65aef483cdf3b0b26df1d03aac82f4cb181a71185cad60dff3f487122f3e5d

memory/2292-17-0x0000000003E60000-0x000000000432A000-memory.dmp

memory/2292-24-0x0000000010000000-0x0000000010030000-memory.dmp

memory/2292-22-0x00000000010C0000-0x0000000001373000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-08-17 11:47

Reported

2024-08-17 11:49

Platform

win10v2004-20240802-en

Max time kernel

104s

Max time network

105s

Command Line

"C:\Users\Admin\AppData\Local\Temp\8cf2d659fba0560812bc1419a3248df0N.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

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-2392887640-1187051047-2909758433-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\8cf2d659fba0560812bc1419a3248df0N.exe N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\{CF920962-8220-4FBB-8FF3-81086CD9240B}\WhaleSetup.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\8cf2d659fba0560812bc1419a3248df0N.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\8cf2d659fba0560812bc1419a3248df0N.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\8cf2d659fba0560812bc1419a3248df0N.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\{CF920962-8220-4FBB-8FF3-81086CD9240B}\WhaleSetup.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\8cf2d659fba0560812bc1419a3248df0N.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\8cf2d659fba0560812bc1419a3248df0N.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\8cf2d659fba0560812bc1419a3248df0N.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\8cf2d659fba0560812bc1419a3248df0N.exe

"C:\Users\Admin\AppData\Local\Temp\8cf2d659fba0560812bc1419a3248df0N.exe"

C:\Users\Admin\AppData\Local\Temp\{CF920962-8220-4FBB-8FF3-81086CD9240B}\WhaleSetup.exe

"C:\Users\Admin\AppData\Local\Temp\{CF920962-8220-4FBB-8FF3-81086CD9240B}\WhaleSetup.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 4260 -ip 4260

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 4260 -s 1844

Network

Country Destination Domain Proto
US 8.8.8.8:53 g.bing.com udp
US 13.107.21.237:443 g.bing.com tcp
US 8.8.8.8:53 209.205.72.20.in-addr.arpa udp
US 8.8.8.8:53 237.21.107.13.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 8.8.8.8:53 138.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 28.118.140.52.in-addr.arpa udp
US 8.8.8.8:53 86.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
US 8.8.8.8:53 192.142.123.92.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 43.229.111.52.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
US 8.8.8.8:53 55.36.223.20.in-addr.arpa udp
US 8.8.8.8:53 10.27.171.150.in-addr.arpa udp

Files

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

MD5 7574cf2c64f35161ab1292e2f532aabf
SHA1 14ba3fa927a06224dfe587014299e834def4644f
SHA256 de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085
SHA512 4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab

memory/2208-2-0x0000000010000000-0x0000000010030000-memory.dmp

memory/2208-6-0x00000000009B1000-0x00000000009B2000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\{CF920962-8220-4FBB-8FF3-81086CD9240B}\WhaleSetup.exe

MD5 fb4700387ec4a35d8f3eef8226da998a
SHA1 8f1b993a908dc3ba9316af2cbb82bdc7fbf51297
SHA256 3c9051b9eb15946a907c16f1aa3d1b1c50519da83e165649a641700c2d9fc555
SHA512 73791d59096587396529f3aaaf9b39a678d738ebda9e09e59c414418154ca8b1e6637c5192616f3a027dadb952c425a3e7e6dcadc69df11b0c970bb5d1e1a4ab

memory/4260-17-0x0000000000BD0000-0x000000000109A000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\{CF920962-8220-4FBB-8FF3-81086CD9240B}\WhaleSetup.exe.tmp

MD5 180d774f53837061c61f8c8ab169d113
SHA1 30e865e257eb243762fda7a11faafd991e2212f5
SHA256 bea4afbab02266f3206b25f48a930e7e8e36fb04df1d3696e1c98a1ec86fa362
SHA512 571b63f71eb19ac7e26ccf74aaccd43b7911af707353808e5f36f5a7e5d5918049d2f8261257ee9cb762c3aa45b55cf31f466f1e9e7f2bf8f777e10220e60901

memory/2208-34-0x00000000044E0000-0x00000000049AA000-memory.dmp

memory/2208-35-0x00000000044E0000-0x00000000049AA000-memory.dmp

memory/4260-39-0x0000000000BD0000-0x000000000109A000-memory.dmp

memory/2208-40-0x00000000009B0000-0x0000000000C63000-memory.dmp

memory/2208-42-0x0000000010000000-0x0000000010030000-memory.dmp