Malware Analysis Report

2025-05-06 04:20

Sample ID 241109-s5xm6sxdjb
Target 7f5a2a16b8ea48b6b87919c6282bdc68583cf2ae8cd3c0b7b0a57f5cd2547e18N
SHA256 7f5a2a16b8ea48b6b87919c6282bdc68583cf2ae8cd3c0b7b0a57f5cd2547e18
Tags
upx defense_evasion discovery evasion
score
8/10

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
8/10

SHA256

7f5a2a16b8ea48b6b87919c6282bdc68583cf2ae8cd3c0b7b0a57f5cd2547e18

Threat Level: Likely malicious

The file 7f5a2a16b8ea48b6b87919c6282bdc68583cf2ae8cd3c0b7b0a57f5cd2547e18N was found to be: Likely malicious.

Malicious Activity Summary

upx defense_evasion discovery evasion

Sets file to hidden

Executes dropped EXE

Checks computer location settings

Deletes itself

Indicator Removal: File Deletion

UPX packed file

Drops file in Windows directory

Unsigned PE

System Location Discovery: System Language Discovery

Enumerates physical storage devices

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

Views/modifies file attributes

Checks processor information in registry

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-11-09 15:43

Signatures

UPX packed file

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

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-11-09 15:43

Reported

2024-11-09 15:45

Platform

win7-20240903-en

Max time kernel

118s

Max time network

120s

Command Line

"C:\Users\Admin\AppData\Local\Temp\7f5a2a16b8ea48b6b87919c6282bdc68583cf2ae8cd3c0b7b0a57f5cd2547e18N.exe"

Signatures

Sets file to hidden

evasion
Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\attrib.exe N/A

Deletes itself

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\cmd.exe N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Windows\Debug\ayahost.exe N/A

Indicator Removal: File Deletion

defense_evasion

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

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\Debug\ayahost.exe C:\Users\Admin\AppData\Local\Temp\7f5a2a16b8ea48b6b87919c6282bdc68583cf2ae8cd3c0b7b0a57f5cd2547e18N.exe N/A
File opened for modification C:\Windows\Debug\ayahost.exe C:\Users\Admin\AppData\Local\Temp\7f5a2a16b8ea48b6b87919c6282bdc68583cf2ae8cd3c0b7b0a57f5cd2547e18N.exe N/A
File opened for modification C:\Windows\Debug\ayahost.exe C:\Windows\SysWOW64\attrib.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:\Windows\Debug\ayahost.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\cmd.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\7f5a2a16b8ea48b6b87919c6282bdc68583cf2ae8cd3c0b7b0a57f5cd2547e18N.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\attrib.exe N/A

Checks processor information in registry

Description Indicator Process Target
Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 C:\Windows\Debug\ayahost.exe N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz C:\Windows\Debug\ayahost.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\7f5a2a16b8ea48b6b87919c6282bdc68583cf2ae8cd3c0b7b0a57f5cd2547e18N.exe N/A

Views/modifies file attributes

evasion
Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\attrib.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\7f5a2a16b8ea48b6b87919c6282bdc68583cf2ae8cd3c0b7b0a57f5cd2547e18N.exe

"C:\Users\Admin\AppData\Local\Temp\7f5a2a16b8ea48b6b87919c6282bdc68583cf2ae8cd3c0b7b0a57f5cd2547e18N.exe"

C:\Windows\SysWOW64\attrib.exe

attrib +a +s +h +r C:\Windows\Debug\ayahost.exe

C:\Windows\Debug\ayahost.exe

C:\Windows\Debug\ayahost.exe

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\system32\cmd.exe" /c del C:\Users\Admin\AppData\Local\Temp\7F5A2A~1.EXE > nul

Network

Country Destination Domain Proto
US 8.8.8.8:53 www.baidu.com udp
HK 103.235.46.96:80 www.baidu.com tcp
US 8.8.8.8:53 PjYiyebns.nnnn.eu.org udp
US 8.8.8.8:53 zPFuFf8jW6.nnnn.eu.org udp

Files

memory/1640-0-0x0000000000400000-0x0000000000416000-memory.dmp

C:\Windows\debug\ayahost.exe

MD5 8e1fc2132feedc791cbc5e8df83de327
SHA1 68f48b3fe2d0712a49db89647639fe545875b6ca
SHA256 a26f913d070d77eac487f12967e35f0573e6341248577b851dbfbb3afb22e13c
SHA512 7983d9d79e7dcab07d178bcd1aab01d37a35797425fe3a30e8d0d4cb9c263358883cac308a0c035cfc858ef5fed429ec5630d2601057163861fc2673bf27248d

memory/2580-5-0x0000000000400000-0x0000000000416000-memory.dmp

memory/2580-6-0x0000000000400000-0x0000000000416000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-11-09 15:43

Reported

2024-11-09 15:45

Platform

win10v2004-20241007-en

Max time kernel

111s

Max time network

95s

Command Line

"C:\Users\Admin\AppData\Local\Temp\7f5a2a16b8ea48b6b87919c6282bdc68583cf2ae8cd3c0b7b0a57f5cd2547e18N.exe"

Signatures

Sets file to hidden

evasion
Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\attrib.exe N/A

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\7f5a2a16b8ea48b6b87919c6282bdc68583cf2ae8cd3c0b7b0a57f5cd2547e18N.exe N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Windows\Debug\hauhost.exe N/A

Indicator Removal: File Deletion

defense_evasion

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

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\Debug\hauhost.exe C:\Users\Admin\AppData\Local\Temp\7f5a2a16b8ea48b6b87919c6282bdc68583cf2ae8cd3c0b7b0a57f5cd2547e18N.exe N/A
File opened for modification C:\Windows\Debug\hauhost.exe C:\Users\Admin\AppData\Local\Temp\7f5a2a16b8ea48b6b87919c6282bdc68583cf2ae8cd3c0b7b0a57f5cd2547e18N.exe N/A
File opened for modification C:\Windows\Debug\hauhost.exe C:\Windows\SysWOW64\attrib.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:\Windows\SysWOW64\cmd.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\7f5a2a16b8ea48b6b87919c6282bdc68583cf2ae8cd3c0b7b0a57f5cd2547e18N.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\Debug\hauhost.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\attrib.exe N/A

Checks processor information in registry

Description Indicator Process Target
Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 C:\Windows\Debug\hauhost.exe N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz C:\Windows\Debug\hauhost.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\7f5a2a16b8ea48b6b87919c6282bdc68583cf2ae8cd3c0b7b0a57f5cd2547e18N.exe N/A

Views/modifies file attributes

evasion
Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\attrib.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\7f5a2a16b8ea48b6b87919c6282bdc68583cf2ae8cd3c0b7b0a57f5cd2547e18N.exe

"C:\Users\Admin\AppData\Local\Temp\7f5a2a16b8ea48b6b87919c6282bdc68583cf2ae8cd3c0b7b0a57f5cd2547e18N.exe"

C:\Windows\SysWOW64\attrib.exe

attrib +a +s +h +r C:\Windows\Debug\hauhost.exe

C:\Windows\Debug\hauhost.exe

C:\Windows\Debug\hauhost.exe

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\system32\cmd.exe" /c del C:\Users\Admin\AppData\Local\Temp\7F5A2A~1.EXE > nul

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 217.106.137.52.in-addr.arpa udp
US 8.8.8.8:53 88.210.23.2.in-addr.arpa udp
US 8.8.8.8:53 www.baidu.com udp
HK 103.235.47.188:80 www.baidu.com tcp
US 8.8.8.8:53 20.160.190.20.in-addr.arpa udp
US 8.8.8.8:53 188.47.235.103.in-addr.arpa udp
US 8.8.8.8:53 154.239.44.20.in-addr.arpa udp
US 8.8.8.8:53 28.118.140.52.in-addr.arpa udp
US 8.8.8.8:53 200.163.202.172.in-addr.arpa udp
US 8.8.8.8:53 241.42.69.40.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 PjYiyebns.nnnn.eu.org udp
US 8.8.8.8:53 zPFuFf8jW6.nnnn.eu.org udp
US 8.8.8.8:53 11.227.111.52.in-addr.arpa udp

Files

memory/2732-0-0x0000000000400000-0x0000000000416000-memory.dmp

C:\Windows\debug\hauhost.exe

MD5 8e1fc2132feedc791cbc5e8df83de327
SHA1 68f48b3fe2d0712a49db89647639fe545875b6ca
SHA256 a26f913d070d77eac487f12967e35f0573e6341248577b851dbfbb3afb22e13c
SHA512 7983d9d79e7dcab07d178bcd1aab01d37a35797425fe3a30e8d0d4cb9c263358883cac308a0c035cfc858ef5fed429ec5630d2601057163861fc2673bf27248d

memory/2732-5-0x0000000000400000-0x0000000000416000-memory.dmp

memory/4736-6-0x0000000000400000-0x0000000000416000-memory.dmp