Malware Analysis Report

2024-12-07 16:50

Sample ID 241113-f1gd6swgrf
Target 53e76fd5c5bb1fd185662515341642b0a96bcb0390b66425bee34296d6888e8eN
SHA256 53e76fd5c5bb1fd185662515341642b0a96bcb0390b66425bee34296d6888e8e
Tags
defense_evasion discovery evasion
score
8/10

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
8/10

SHA256

53e76fd5c5bb1fd185662515341642b0a96bcb0390b66425bee34296d6888e8e

Threat Level: Likely malicious

The file 53e76fd5c5bb1fd185662515341642b0a96bcb0390b66425bee34296d6888e8eN was found to be: Likely malicious.

Malicious Activity Summary

defense_evasion discovery evasion

Sets file to hidden

Checks computer location settings

Deletes itself

Executes dropped EXE

Indicator Removal: File Deletion

Drops file in Windows directory

Unsigned PE

Enumerates physical storage devices

System Location Discovery: System Language Discovery

Suspicious use of WriteProcessMemory

Views/modifies file attributes

Suspicious use of AdjustPrivilegeToken

Checks processor information in registry

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-11-13 05:20

Signatures

Unsigned PE

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

Analysis: behavioral2

Detonation Overview

Submitted

2024-11-13 05:20

Reported

2024-11-13 05:22

Platform

win10v2004-20241007-en

Max time kernel

111s

Max time network

96s

Command Line

"C:\Users\Admin\AppData\Local\Temp\53e76fd5c5bb1fd185662515341642b0a96bcb0390b66425bee34296d6888e8eN.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-1-5-21-493223053-2004649691-1575712786-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\53e76fd5c5bb1fd185662515341642b0a96bcb0390b66425bee34296d6888e8eN.exe N/A

Executes dropped EXE

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

Indicator Removal: File Deletion

defense_evasion

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\Debug\yyghost.exe C:\Users\Admin\AppData\Local\Temp\53e76fd5c5bb1fd185662515341642b0a96bcb0390b66425bee34296d6888e8eN.exe N/A
File opened for modification C:\Windows\Debug\yyghost.exe C:\Users\Admin\AppData\Local\Temp\53e76fd5c5bb1fd185662515341642b0a96bcb0390b66425bee34296d6888e8eN.exe N/A
File opened for modification C:\Windows\Debug\yyghost.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\53e76fd5c5bb1fd185662515341642b0a96bcb0390b66425bee34296d6888e8eN.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\Debug\yyghost.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\yyghost.exe N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz C:\Windows\Debug\yyghost.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\53e76fd5c5bb1fd185662515341642b0a96bcb0390b66425bee34296d6888e8eN.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\53e76fd5c5bb1fd185662515341642b0a96bcb0390b66425bee34296d6888e8eN.exe

"C:\Users\Admin\AppData\Local\Temp\53e76fd5c5bb1fd185662515341642b0a96bcb0390b66425bee34296d6888e8eN.exe"

C:\Windows\SysWOW64\attrib.exe

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

C:\Windows\Debug\yyghost.exe

C:\Windows\Debug\yyghost.exe

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\system32\cmd.exe" /c del C:\Users\Admin\AppData\Local\Temp\53E76F~1.EXE > nul

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 104.219.191.52.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
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 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 72.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 96.46.235.103.in-addr.arpa udp
US 8.8.8.8:53 58.55.71.13.in-addr.arpa udp
US 8.8.8.8:53 56.163.245.4.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 83.210.23.2.in-addr.arpa udp
US 8.8.8.8:53 oVHuK1pL.nnnn.eu.org udp
US 8.8.8.8:53 88.210.23.2.in-addr.arpa udp
US 8.8.8.8:53 31.243.111.52.in-addr.arpa udp
US 8.8.8.8:53 OCMSoVx4P.nnnn.eu.org udp

Files

memory/2228-0-0x0000000000400000-0x0000000000410000-memory.dmp

C:\Windows\debug\yyghost.exe

MD5 cfcf4e21b23db6164c304ae9e0b165ef
SHA1 27bff054e873cec4ae407518ceaf3f2ba02e8620
SHA256 f69716706a505ceeb9a8ec552bf5925e170503fcbea57f70ab908fcc00f8cba5
SHA512 c5abb16abf28015bd91dab9691d5f19208e63503e01a6cb388df2d3629c4802701b84b7fb204aa7e96b6df449b96bcb0a2b528edc5b0e8d8e8f049b8c20806f7

memory/2228-5-0x0000000000400000-0x0000000000410000-memory.dmp

memory/2452-6-0x0000000000400000-0x0000000000410000-memory.dmp

Analysis: behavioral1

Detonation Overview

Submitted

2024-11-13 05:20

Reported

2024-11-13 05:22

Platform

win7-20240708-en

Max time kernel

118s

Max time network

118s

Command Line

"C:\Users\Admin\AppData\Local\Temp\53e76fd5c5bb1fd185662515341642b0a96bcb0390b66425bee34296d6888e8eN.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

Drops file in Windows directory

Description Indicator Process Target
File opened for modification C:\Windows\Debug\ayahost.exe C:\Windows\SysWOW64\attrib.exe N/A
File created C:\Windows\Debug\ayahost.exe C:\Users\Admin\AppData\Local\Temp\53e76fd5c5bb1fd185662515341642b0a96bcb0390b66425bee34296d6888e8eN.exe N/A
File opened for modification C:\Windows\Debug\ayahost.exe C:\Users\Admin\AppData\Local\Temp\53e76fd5c5bb1fd185662515341642b0a96bcb0390b66425bee34296d6888e8eN.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\53e76fd5c5bb1fd185662515341642b0a96bcb0390b66425bee34296d6888e8eN.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\attrib.exe N/A
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

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\53e76fd5c5bb1fd185662515341642b0a96bcb0390b66425bee34296d6888e8eN.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\53e76fd5c5bb1fd185662515341642b0a96bcb0390b66425bee34296d6888e8eN.exe

"C:\Users\Admin\AppData\Local\Temp\53e76fd5c5bb1fd185662515341642b0a96bcb0390b66425bee34296d6888e8eN.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\53E76F~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 inRYhcGDV.nnnn.eu.org udp
US 8.8.8.8:53 Iz8jy96Oxj.nnnn.eu.org udp

Files

memory/1452-0-0x0000000000400000-0x0000000000410000-memory.dmp

C:\Windows\Debug\ayahost.exe

MD5 a8b90df1b65397d9df8eca8eb77558f6
SHA1 80b1466aeabbd24d7f235b4d943c9b71e6c70748
SHA256 2b7d5a953d8f541c1250d5f5185f025ee274a2936035a93d500f7535dd4bc37f
SHA512 419b16c42a7650b9f9d37da47f0283a6848a0c25060c7b4244e4b5061ed15062c020a3b71c4bed4d319fb17c98320bede8567b02ec3c7dc9ee32447c5d2a5162

memory/2352-5-0x0000000000400000-0x0000000000410000-memory.dmp

memory/1452-6-0x0000000000400000-0x0000000000410000-memory.dmp

memory/2352-7-0x0000000000400000-0x0000000000410000-memory.dmp