Malware Analysis Report

2024-12-08 02:45

Sample ID 240817-mp52qa1ejd
Target a0a29d76b6b23135a6426d097f66a2f0N.exe
SHA256 a387d62d510c6261f28de4ea0663ffce12ea59132f01b2938c7de4e92f2304f2
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

a387d62d510c6261f28de4ea0663ffce12ea59132f01b2938c7de4e92f2304f2

Threat Level: Known bad

The file a0a29d76b6b23135a6426d097f66a2f0N.exe was found to be: Known bad.

Malicious Activity Summary

floxif backdoor discovery trojan upx

Floxif, Floodfix

Detects Floxif payload

ACProtect 1.3x - 1.4x DLL software

UPX packed file

Loads dropped DLL

Enumerates connected drives

Drops file in Program Files directory

Enumerates physical storage devices

System Location Discovery: System Language Discovery

Suspicious use of FindShellTrayWindow

Suspicious use of SendNotifyMessage

Suspicious use of AdjustPrivilegeToken

Suspicious behavior: EnumeratesProcesses

Suspicious use of SetWindowsHookEx

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-08-17 10:39

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-08-17 10:39

Reported

2024-08-17 10:41

Platform

win7-20240704-en

Max time kernel

117s

Max time network

118s

Command Line

"C:\Users\Admin\AppData\Local\Temp\a0a29d76b6b23135a6426d097f66a2f0N.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

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) \??\I: C:\Users\Admin\AppData\Local\Temp\a0a29d76b6b23135a6426d097f66a2f0N.exe N/A
File opened (read-only) \??\N: C:\Users\Admin\AppData\Local\Temp\a0a29d76b6b23135a6426d097f66a2f0N.exe N/A
File opened (read-only) \??\R: C:\Users\Admin\AppData\Local\Temp\a0a29d76b6b23135a6426d097f66a2f0N.exe N/A
File opened (read-only) \??\Y: C:\Users\Admin\AppData\Local\Temp\a0a29d76b6b23135a6426d097f66a2f0N.exe N/A
File opened (read-only) \??\e: C:\Users\Admin\AppData\Local\Temp\a0a29d76b6b23135a6426d097f66a2f0N.exe N/A
File opened (read-only) \??\H: C:\Users\Admin\AppData\Local\Temp\a0a29d76b6b23135a6426d097f66a2f0N.exe N/A
File opened (read-only) \??\L: C:\Users\Admin\AppData\Local\Temp\a0a29d76b6b23135a6426d097f66a2f0N.exe N/A
File opened (read-only) \??\Q: C:\Users\Admin\AppData\Local\Temp\a0a29d76b6b23135a6426d097f66a2f0N.exe N/A
File opened (read-only) \??\S: C:\Users\Admin\AppData\Local\Temp\a0a29d76b6b23135a6426d097f66a2f0N.exe N/A
File opened (read-only) \??\W: C:\Users\Admin\AppData\Local\Temp\a0a29d76b6b23135a6426d097f66a2f0N.exe N/A
File opened (read-only) \??\X: C:\Users\Admin\AppData\Local\Temp\a0a29d76b6b23135a6426d097f66a2f0N.exe N/A
File opened (read-only) \??\K: C:\Users\Admin\AppData\Local\Temp\a0a29d76b6b23135a6426d097f66a2f0N.exe N/A
File opened (read-only) \??\B: C:\Users\Admin\AppData\Local\Temp\a0a29d76b6b23135a6426d097f66a2f0N.exe N/A
File opened (read-only) \??\E: C:\Users\Admin\AppData\Local\Temp\a0a29d76b6b23135a6426d097f66a2f0N.exe N/A
File opened (read-only) \??\G: C:\Users\Admin\AppData\Local\Temp\a0a29d76b6b23135a6426d097f66a2f0N.exe N/A
File opened (read-only) \??\J: C:\Users\Admin\AppData\Local\Temp\a0a29d76b6b23135a6426d097f66a2f0N.exe N/A
File opened (read-only) \??\M: C:\Users\Admin\AppData\Local\Temp\a0a29d76b6b23135a6426d097f66a2f0N.exe N/A
File opened (read-only) \??\V: C:\Users\Admin\AppData\Local\Temp\a0a29d76b6b23135a6426d097f66a2f0N.exe N/A
File opened (read-only) \??\Z: C:\Users\Admin\AppData\Local\Temp\a0a29d76b6b23135a6426d097f66a2f0N.exe N/A
File opened (read-only) \??\A: C:\Users\Admin\AppData\Local\Temp\a0a29d76b6b23135a6426d097f66a2f0N.exe N/A
File opened (read-only) \??\P: C:\Users\Admin\AppData\Local\Temp\a0a29d76b6b23135a6426d097f66a2f0N.exe N/A
File opened (read-only) \??\T: C:\Users\Admin\AppData\Local\Temp\a0a29d76b6b23135a6426d097f66a2f0N.exe N/A
File opened (read-only) \??\U: C:\Users\Admin\AppData\Local\Temp\a0a29d76b6b23135a6426d097f66a2f0N.exe N/A
File opened (read-only) \??\O: C:\Users\Admin\AppData\Local\Temp\a0a29d76b6b23135a6426d097f66a2f0N.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\a0a29d76b6b23135a6426d097f66a2f0N.exe N/A
File opened for modification C:\PROGRA~2\MICROS~1\Office14\GROOVEEX.DLL C:\Users\Admin\AppData\Local\Temp\a0a29d76b6b23135a6426d097f66a2f0N.exe N/A
File created C:\PROGRA~2\MICROS~1\Office14\GROOVEEX.DLL.tmp C:\Users\Admin\AppData\Local\Temp\a0a29d76b6b23135a6426d097f66a2f0N.exe N/A
File opened for modification C:\PROGRA~2\MICROS~1\Office14\GROOVEEX.DLL.dat C:\Users\Admin\AppData\Local\Temp\a0a29d76b6b23135a6426d097f66a2f0N.exe N/A
File created \??\c:\program files\common files\system\symsrv.dll.000 C:\Users\Admin\AppData\Local\Temp\a0a29d76b6b23135a6426d097f66a2f0N.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\a0a29d76b6b23135a6426d097f66a2f0N.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\a0a29d76b6b23135a6426d097f66a2f0N.exe N/A

Suspicious use of FindShellTrayWindow

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\a0a29d76b6b23135a6426d097f66a2f0N.exe N/A

Suspicious use of SendNotifyMessage

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\a0a29d76b6b23135a6426d097f66a2f0N.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\a0a29d76b6b23135a6426d097f66a2f0N.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\a0a29d76b6b23135a6426d097f66a2f0N.exe

"C:\Users\Admin\AppData\Local\Temp\a0a29d76b6b23135a6426d097f66a2f0N.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 45.33.18.44:80 www.aieov.com tcp
US 45.33.18.44:80 www.aieov.com tcp
US 45.33.18.44:80 www.aieov.com tcp
US 45.33.18.44:80 www.aieov.com tcp
US 45.33.18.44:80 www.aieov.com tcp
US 45.33.18.44:80 www.aieov.com tcp

Files

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

MD5 7574cf2c64f35161ab1292e2f532aabf
SHA1 14ba3fa927a06224dfe587014299e834def4644f
SHA256 de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085
SHA512 4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab

memory/1968-3-0x0000000010000000-0x0000000010030000-memory.dmp

memory/1968-5-0x00000000012D1000-0x00000000012D2000-memory.dmp

memory/1968-6-0x00000000012D0000-0x0000000001484000-memory.dmp

\PROGRA~2\MICROS~1\Office14\GROOVEEX.DLL.tmp

MD5 7c22ae5461b604d34de9a18df87d00ae
SHA1 587f000876ad43532fa755757890248644f8e450
SHA256 696166f49f653ffe7ae08621d68fcdbaf7aaa738b25e861cb79c437622189c29
SHA512 b52845448c424318be7bc85defc437d8125ed43db949159d678b1ee99b2d909d87dac65831d4a9f09d33e83912d357e1727ce2446e45c1417c8f2dd8529361ee

memory/1968-15-0x0000000010000000-0x0000000010030000-memory.dmp

memory/1968-16-0x00000000012D0000-0x0000000001484000-memory.dmp

memory/1968-18-0x0000000073A10000-0x0000000073E1B000-memory.dmp

memory/1968-22-0x0000000010000000-0x0000000010030000-memory.dmp

memory/1968-27-0x0000000010000000-0x0000000010030000-memory.dmp

memory/1968-26-0x00000000012D0000-0x0000000001484000-memory.dmp

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

MD5 1130c911bf5db4b8f7cf9b6f4b457623
SHA1 48e734c4bc1a8b5399bff4954e54b268bde9d54c
SHA256 eba08cc8182f379392a97f542b350ea0dbbe5e4009472f35af20e3d857eafdf1
SHA512 94e2511ef2c53494c2aff0960266491ffc0e54e75185427d1ccedae27c286992c754ca94cbb0c9ea36e3f04cd4eb7f032c551cf2d4b309f292906303f1a75fa0

memory/1968-33-0x00000000012D0000-0x0000000001484000-memory.dmp

memory/1968-34-0x0000000010000000-0x0000000010030000-memory.dmp

memory/1968-39-0x0000000010000000-0x0000000010030000-memory.dmp

memory/1968-43-0x0000000010000000-0x0000000010030000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-08-17 10:39

Reported

2024-08-17 10:41

Platform

win10v2004-20240802-en

Max time kernel

116s

Max time network

122s

Command Line

"C:\Users\Admin\AppData\Local\Temp\a0a29d76b6b23135a6426d097f66a2f0N.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\a0a29d76b6b23135a6426d097f66a2f0N.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) \??\P: C:\Users\Admin\AppData\Local\Temp\a0a29d76b6b23135a6426d097f66a2f0N.exe N/A
File opened (read-only) \??\R: C:\Users\Admin\AppData\Local\Temp\a0a29d76b6b23135a6426d097f66a2f0N.exe N/A
File opened (read-only) \??\T: C:\Users\Admin\AppData\Local\Temp\a0a29d76b6b23135a6426d097f66a2f0N.exe N/A
File opened (read-only) \??\W: C:\Users\Admin\AppData\Local\Temp\a0a29d76b6b23135a6426d097f66a2f0N.exe N/A
File opened (read-only) \??\A: C:\Users\Admin\AppData\Local\Temp\a0a29d76b6b23135a6426d097f66a2f0N.exe N/A
File opened (read-only) \??\K: C:\Users\Admin\AppData\Local\Temp\a0a29d76b6b23135a6426d097f66a2f0N.exe N/A
File opened (read-only) \??\H: C:\Users\Admin\AppData\Local\Temp\a0a29d76b6b23135a6426d097f66a2f0N.exe N/A
File opened (read-only) \??\J: C:\Users\Admin\AppData\Local\Temp\a0a29d76b6b23135a6426d097f66a2f0N.exe N/A
File opened (read-only) \??\B: C:\Users\Admin\AppData\Local\Temp\a0a29d76b6b23135a6426d097f66a2f0N.exe N/A
File opened (read-only) \??\G: C:\Users\Admin\AppData\Local\Temp\a0a29d76b6b23135a6426d097f66a2f0N.exe N/A
File opened (read-only) \??\U: C:\Users\Admin\AppData\Local\Temp\a0a29d76b6b23135a6426d097f66a2f0N.exe N/A
File opened (read-only) \??\V: C:\Users\Admin\AppData\Local\Temp\a0a29d76b6b23135a6426d097f66a2f0N.exe N/A
File opened (read-only) \??\Y: C:\Users\Admin\AppData\Local\Temp\a0a29d76b6b23135a6426d097f66a2f0N.exe N/A
File opened (read-only) \??\e: C:\Users\Admin\AppData\Local\Temp\a0a29d76b6b23135a6426d097f66a2f0N.exe N/A
File opened (read-only) \??\N: C:\Users\Admin\AppData\Local\Temp\a0a29d76b6b23135a6426d097f66a2f0N.exe N/A
File opened (read-only) \??\O: C:\Users\Admin\AppData\Local\Temp\a0a29d76b6b23135a6426d097f66a2f0N.exe N/A
File opened (read-only) \??\L: C:\Users\Admin\AppData\Local\Temp\a0a29d76b6b23135a6426d097f66a2f0N.exe N/A
File opened (read-only) \??\M: C:\Users\Admin\AppData\Local\Temp\a0a29d76b6b23135a6426d097f66a2f0N.exe N/A
File opened (read-only) \??\Q: C:\Users\Admin\AppData\Local\Temp\a0a29d76b6b23135a6426d097f66a2f0N.exe N/A
File opened (read-only) \??\S: C:\Users\Admin\AppData\Local\Temp\a0a29d76b6b23135a6426d097f66a2f0N.exe N/A
File opened (read-only) \??\X: C:\Users\Admin\AppData\Local\Temp\a0a29d76b6b23135a6426d097f66a2f0N.exe N/A
File opened (read-only) \??\Z: C:\Users\Admin\AppData\Local\Temp\a0a29d76b6b23135a6426d097f66a2f0N.exe N/A
File opened (read-only) \??\E: C:\Users\Admin\AppData\Local\Temp\a0a29d76b6b23135a6426d097f66a2f0N.exe N/A
File opened (read-only) \??\I: C:\Users\Admin\AppData\Local\Temp\a0a29d76b6b23135a6426d097f66a2f0N.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\a0a29d76b6b23135a6426d097f66a2f0N.exe N/A
File created \??\c:\program files\common files\system\symsrv.dll.000 C:\Users\Admin\AppData\Local\Temp\a0a29d76b6b23135a6426d097f66a2f0N.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\a0a29d76b6b23135a6426d097f66a2f0N.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\a0a29d76b6b23135a6426d097f66a2f0N.exe N/A

Suspicious use of FindShellTrayWindow

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\a0a29d76b6b23135a6426d097f66a2f0N.exe N/A

Suspicious use of SendNotifyMessage

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\a0a29d76b6b23135a6426d097f66a2f0N.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\a0a29d76b6b23135a6426d097f66a2f0N.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\a0a29d76b6b23135a6426d097f66a2f0N.exe

"C:\Users\Admin\AppData\Local\Temp\a0a29d76b6b23135a6426d097f66a2f0N.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 13.86.106.20.in-addr.arpa udp
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
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 5isohu.com udp
US 8.8.8.8:53 73.144.22.2.in-addr.arpa udp
US 8.8.8.8:53 www.aieov.com udp
US 8.8.8.8:53 237.21.107.13.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 72.14.185.43:80 www.aieov.com tcp
US 8.8.8.8:53 43.185.14.72.in-addr.arpa udp
US 8.8.8.8:53 140.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
US 72.14.185.43:80 www.aieov.com tcp
US 8.8.8.8:53 5isohu.com udp
US 72.14.185.43:80 www.aieov.com tcp
US 8.8.8.8:53 5isohu.com udp
US 72.14.185.43:80 www.aieov.com tcp
US 8.8.8.8:53 5isohu.com udp
US 72.14.185.43:80 www.aieov.com tcp
US 8.8.8.8:53 5isohu.com udp
US 72.14.185.43:80 www.aieov.com tcp
US 8.8.8.8:53 86.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 13.227.111.52.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
US 8.8.8.8:53 58.99.105.20.in-addr.arpa udp

Files

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

MD5 7574cf2c64f35161ab1292e2f532aabf
SHA1 14ba3fa927a06224dfe587014299e834def4644f
SHA256 de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085
SHA512 4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab

memory/5004-4-0x0000000010000000-0x0000000010030000-memory.dmp

memory/5004-6-0x0000000000891000-0x0000000000892000-memory.dmp

memory/5004-7-0x0000000000890000-0x0000000000A44000-memory.dmp

memory/5004-8-0x0000000000890000-0x0000000000A44000-memory.dmp

memory/5004-16-0x0000000010000000-0x0000000010030000-memory.dmp

memory/5004-17-0x0000000000890000-0x0000000000A44000-memory.dmp

memory/5004-19-0x0000000010000000-0x0000000010030000-memory.dmp

memory/5004-18-0x0000000000890000-0x0000000000A44000-memory.dmp

memory/5004-25-0x0000000010000000-0x0000000010030000-memory.dmp

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

MD5 1130c911bf5db4b8f7cf9b6f4b457623
SHA1 48e734c4bc1a8b5399bff4954e54b268bde9d54c
SHA256 eba08cc8182f379392a97f542b350ea0dbbe5e4009472f35af20e3d857eafdf1
SHA512 94e2511ef2c53494c2aff0960266491ffc0e54e75185427d1ccedae27c286992c754ca94cbb0c9ea36e3f04cd4eb7f032c551cf2d4b309f292906303f1a75fa0

memory/5004-31-0x0000000010000000-0x0000000010030000-memory.dmp

memory/5004-43-0x0000000010000000-0x0000000010030000-memory.dmp