Malware Analysis Report

2025-08-05 11:48

Sample ID 241031-e4dxsa1phl
Target f9aefb1b37168ea33f607f053bbc7b7d2113ca98260b5be9627cd77cbe560f58N
SHA256 f9aefb1b37168ea33f607f053bbc7b7d2113ca98260b5be9627cd77cbe560f58
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

f9aefb1b37168ea33f607f053bbc7b7d2113ca98260b5be9627cd77cbe560f58

Threat Level: Likely malicious

The file f9aefb1b37168ea33f607f053bbc7b7d2113ca98260b5be9627cd77cbe560f58N was found to be: Likely malicious.

Malicious Activity Summary

upx defense_evasion discovery evasion

Sets file to hidden

Executes dropped EXE

Deletes itself

Checks computer location settings

Indicator Removal: File Deletion

UPX packed file

Drops file in Windows directory

Enumerates physical storage devices

System Location Discovery: System Language Discovery

Unsigned PE

Suspicious use of WriteProcessMemory

Views/modifies file attributes

Suspicious use of AdjustPrivilegeToken

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-10-31 04:29

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
N/A N/A N/A N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-10-31 04:29

Reported

2024-10-31 04:31

Platform

win7-20240903-en

Max time kernel

120s

Max time network

93s

Command Line

"C:\Users\Admin\AppData\Local\Temp\f9aefb1b37168ea33f607f053bbc7b7d2113ca98260b5be9627cd77cbe560f58N.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
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 opened for modification C:\Windows\Debug\iuyhost.exe C:\Users\Admin\AppData\Local\Temp\f9aefb1b37168ea33f607f053bbc7b7d2113ca98260b5be9627cd77cbe560f58N.exe N/A
File opened for modification C:\Windows\Debug\iuyhost.exe C:\Windows\SysWOW64\attrib.exe N/A
File created C:\Windows\Debug\iuyhost.exe C:\Users\Admin\AppData\Local\Temp\f9aefb1b37168ea33f607f053bbc7b7d2113ca98260b5be9627cd77cbe560f58N.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\iuyhost.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\f9aefb1b37168ea33f607f053bbc7b7d2113ca98260b5be9627cd77cbe560f58N.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\attrib.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\f9aefb1b37168ea33f607f053bbc7b7d2113ca98260b5be9627cd77cbe560f58N.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\f9aefb1b37168ea33f607f053bbc7b7d2113ca98260b5be9627cd77cbe560f58N.exe

"C:\Users\Admin\AppData\Local\Temp\f9aefb1b37168ea33f607f053bbc7b7d2113ca98260b5be9627cd77cbe560f58N.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\F9AEFB~1.EXE > nul

Network

Country Destination Domain Proto
US 8.8.8.8:53 KT7dOs4Hoe.nnnn.eu.org udp
US 8.8.8.8:53 u9oo9q4PYs.nnnn.eu.org udp
US 8.8.8.8:53 UpzzQoXXHa.nnnn.eu.org udp
US 8.8.8.8:53 4VgI191o.nnnn.eu.org udp

Files

memory/328-0-0x0000000000400000-0x0000000000414000-memory.dmp

C:\Windows\Debug\iuyhost.exe

MD5 2aa6f27b55fadf142b533db785a22647
SHA1 1921dcd93a69896eb466dda650bd52402be8e815
SHA256 942df5db5279dd708a7b777e2ff3ee6c746913e5871b825dd9b209db1cc338ad
SHA512 f05cab0a08f82be1040c2732d982e2d186f8be86a710b7decd950a0e5c710b6f755e954e231a8528e2ff85e15f8f50b71201959bc22aa7827a7070e2acab9e0c

memory/328-6-0x0000000000400000-0x0000000000414000-memory.dmp

memory/1588-7-0x0000000000400000-0x0000000000414000-memory.dmp

memory/1588-10-0x0000000000400000-0x0000000000414000-memory.dmp

memory/1588-13-0x0000000000400000-0x0000000000414000-memory.dmp

memory/1588-16-0x0000000000400000-0x0000000000414000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-10-31 04:29

Reported

2024-10-31 04:31

Platform

win10v2004-20241007-en

Max time kernel

111s

Max time network

106s

Command Line

"C:\Users\Admin\AppData\Local\Temp\f9aefb1b37168ea33f607f053bbc7b7d2113ca98260b5be9627cd77cbe560f58N.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\f9aefb1b37168ea33f607f053bbc7b7d2113ca98260b5be9627cd77cbe560f58N.exe N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Windows\Debug\mewhost.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
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\mewhost.exe C:\Users\Admin\AppData\Local\Temp\f9aefb1b37168ea33f607f053bbc7b7d2113ca98260b5be9627cd77cbe560f58N.exe N/A
File opened for modification C:\Windows\Debug\mewhost.exe C:\Users\Admin\AppData\Local\Temp\f9aefb1b37168ea33f607f053bbc7b7d2113ca98260b5be9627cd77cbe560f58N.exe N/A
File opened for modification C:\Windows\Debug\mewhost.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\f9aefb1b37168ea33f607f053bbc7b7d2113ca98260b5be9627cd77cbe560f58N.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\Debug\mewhost.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

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\f9aefb1b37168ea33f607f053bbc7b7d2113ca98260b5be9627cd77cbe560f58N.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\f9aefb1b37168ea33f607f053bbc7b7d2113ca98260b5be9627cd77cbe560f58N.exe

"C:\Users\Admin\AppData\Local\Temp\f9aefb1b37168ea33f607f053bbc7b7d2113ca98260b5be9627cd77cbe560f58N.exe"

C:\Windows\SysWOW64\attrib.exe

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

C:\Windows\Debug\mewhost.exe

C:\Windows\Debug\mewhost.exe

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\system32\cmd.exe" /c del C:\Users\Admin\AppData\Local\Temp\F9AEFB~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 g.bing.com udp
US 150.171.28.10:443 g.bing.com tcp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 0aD03C1JZ.nnnn.eu.org udp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
US 8.8.8.8:53 134.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 149.220.183.52.in-addr.arpa udp
US 8.8.8.8:53 amuod92n.nnnn.eu.org udp
US 8.8.8.8:53 212.20.149.52.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
US 8.8.8.8:53 69.190.18.2.in-addr.arpa udp
US 8.8.8.8:53 S5M6e7Gm1.nnnn.eu.org udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 k8nYrc7sWj.nnnn.eu.org 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 10.27.171.150.in-addr.arpa udp

Files

memory/3428-0-0x0000000000400000-0x0000000000414000-memory.dmp

C:\Windows\debug\mewhost.exe

MD5 fbfbeeae81c4dc2c2ef89aa2421da792
SHA1 9face13a81941a1f5129db9c710e26bfc3cfddff
SHA256 b714a337fcaa499133f82b0dcb1a2767caf5e739f0bdff04dc73d6cfe556265b
SHA512 f765a86efd42669e794157c1ded6658fa1f27c5e9220b22b883bffd01ecd1939a720d7244f6ff9ef6b2cc2b139348a8738ff7d7f4b56dc40e3260288a8bfe096

memory/3428-5-0x0000000000400000-0x0000000000414000-memory.dmp

memory/4760-6-0x0000000000400000-0x0000000000414000-memory.dmp

memory/4760-9-0x0000000000400000-0x0000000000414000-memory.dmp

memory/4760-12-0x0000000000400000-0x0000000000414000-memory.dmp

memory/4760-15-0x0000000000400000-0x0000000000414000-memory.dmp