Malware Analysis Report

2024-11-13 17:36

Sample ID 241110-b3m8aawgpr
Target a44c2a6d65bb122b450d52b51af726ebd349020048ffb9225be9cefe88510080N
SHA256 a44c2a6d65bb122b450d52b51af726ebd349020048ffb9225be9cefe88510080
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

a44c2a6d65bb122b450d52b51af726ebd349020048ffb9225be9cefe88510080

Threat Level: Likely malicious

The file a44c2a6d65bb122b450d52b51af726ebd349020048ffb9225be9cefe88510080N 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

System Location Discovery: System Language Discovery

Unsigned PE

Enumerates physical storage devices

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

Checks processor information in registry

Views/modifies file attributes

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-11-10 01:40

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

2024-11-10 01:40

Reported

2024-11-10 01:42

Platform

win7-20240903-en

Max time kernel

110s

Max time network

93s

Command Line

"C:\Users\Admin\AppData\Local\Temp\a44c2a6d65bb122b450d52b51af726ebd349020048ffb9225be9cefe88510080N.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\iuyhost.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
N/A N/A N/A N/A

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\Debug\iuyhost.exe C:\Users\Admin\AppData\Local\Temp\a44c2a6d65bb122b450d52b51af726ebd349020048ffb9225be9cefe88510080N.exe N/A
File opened for modification C:\Windows\Debug\iuyhost.exe C:\Users\Admin\AppData\Local\Temp\a44c2a6d65bb122b450d52b51af726ebd349020048ffb9225be9cefe88510080N.exe N/A
File opened for modification C:\Windows\Debug\iuyhost.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:\Users\Admin\AppData\Local\Temp\a44c2a6d65bb122b450d52b51af726ebd349020048ffb9225be9cefe88510080N.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\iuyhost.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\iuyhost.exe N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz C:\Windows\Debug\iuyhost.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\a44c2a6d65bb122b450d52b51af726ebd349020048ffb9225be9cefe88510080N.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\a44c2a6d65bb122b450d52b51af726ebd349020048ffb9225be9cefe88510080N.exe

"C:\Users\Admin\AppData\Local\Temp\a44c2a6d65bb122b450d52b51af726ebd349020048ffb9225be9cefe88510080N.exe"

C:\Windows\SysWOW64\attrib.exe

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

C:\Windows\Debug\iuyhost.exe

C:\Windows\Debug\iuyhost.exe

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\system32\cmd.exe" /c del C:\Users\Admin\AppData\Local\Temp\A44C2A~1.EXE > nul

Network

Country Destination Domain Proto
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 akvZkdwvgU.nnnn.eu.org udp
US 8.8.8.8:53 Qdk1bQ3Q.nnnn.eu.org udp

Files

memory/2872-0-0x0000000000400000-0x0000000000416000-memory.dmp

C:\Windows\debug\iuyhost.exe

MD5 cb4a32ad2be645dd5b3e630b5bb349db
SHA1 2a756d2f5ea559fc5f877faa6595f04fad5822e7
SHA256 e62a30f567b69c61a7c0617f14aa1d32059c1e1cb2c52db283b52d20e5e3e5ce
SHA512 242f4e39a627df356c19a56bd82461ace123af16cfa7929d7d64471290fea2b26afb2da8094da2e44724e8b6d37229ad50100e4989f8527657c2379f5ca845f0

memory/2156-5-0x0000000000400000-0x0000000000416000-memory.dmp

memory/2872-6-0x0000000000400000-0x0000000000416000-memory.dmp

memory/2156-7-0x0000000000400000-0x0000000000416000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-11-10 01:40

Reported

2024-11-10 01:42

Platform

win10v2004-20241007-en

Max time kernel

111s

Max time network

94s

Command Line

"C:\Users\Admin\AppData\Local\Temp\a44c2a6d65bb122b450d52b51af726ebd349020048ffb9225be9cefe88510080N.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-1-5-21-2045521122-590294423-3465680274-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\a44c2a6d65bb122b450d52b51af726ebd349020048ffb9225be9cefe88510080N.exe N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Windows\Debug\soohost.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\soohost.exe C:\Users\Admin\AppData\Local\Temp\a44c2a6d65bb122b450d52b51af726ebd349020048ffb9225be9cefe88510080N.exe N/A
File opened for modification C:\Windows\Debug\soohost.exe C:\Users\Admin\AppData\Local\Temp\a44c2a6d65bb122b450d52b51af726ebd349020048ffb9225be9cefe88510080N.exe N/A
File opened for modification C:\Windows\Debug\soohost.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:\Users\Admin\AppData\Local\Temp\a44c2a6d65bb122b450d52b51af726ebd349020048ffb9225be9cefe88510080N.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\Debug\soohost.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\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\soohost.exe N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz C:\Windows\Debug\soohost.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\a44c2a6d65bb122b450d52b51af726ebd349020048ffb9225be9cefe88510080N.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\a44c2a6d65bb122b450d52b51af726ebd349020048ffb9225be9cefe88510080N.exe

"C:\Users\Admin\AppData\Local\Temp\a44c2a6d65bb122b450d52b51af726ebd349020048ffb9225be9cefe88510080N.exe"

C:\Windows\SysWOW64\attrib.exe

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

C:\Windows\Debug\soohost.exe

C:\Windows\Debug\soohost.exe

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\system32\cmd.exe" /c del C:\Users\Admin\AppData\Local\Temp\A44C2A~1.EXE > nul

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 www.baidu.com udp
HK 103.235.46.96:80 www.baidu.com tcp
US 8.8.8.8:53 96.46.235.103.in-addr.arpa udp
US 8.8.8.8:53 17.160.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 228.249.119.40.in-addr.arpa udp
US 8.8.8.8:53 217.106.137.52.in-addr.arpa udp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
US 8.8.8.8:53 133.211.185.52.in-addr.arpa udp
US 8.8.8.8:53 d64g6S9i0J.nnnn.eu.org udp
US 8.8.8.8:53 48.229.111.52.in-addr.arpa udp
US 8.8.8.8:53 DnFrOwcpjX.nnnn.eu.org udp

Files

memory/3260-0-0x0000000000400000-0x0000000000416000-memory.dmp

C:\Windows\debug\soohost.exe

MD5 c6bb83ce668814fae830eb0440684fa0
SHA1 b6a236953010237a2b6422ed1d3bd453f528233f
SHA256 6f39c6ff6ac2bfaaf190e678af5d643a6a4746250b28d7260138d76957918384
SHA512 f7e50ed92a6e44e9a0e800a2a478e8fd6720f070cf9e038c3ac68cde72a1bb42e47c4ce5c688de127b7f355bc633d2bdc67599cd93952a341171760f0abdd822

memory/3260-5-0x0000000000400000-0x0000000000416000-memory.dmp

memory/4552-6-0x0000000000400000-0x0000000000416000-memory.dmp