Malware Analysis Report

2025-01-06 10:33

Sample ID 240601-ellvnshg97
Target daca4dfea716ff4d698330910a45df0cb0697c7910f0197a3be30797014b5dae
SHA256 daca4dfea716ff4d698330910a45df0cb0697c7910f0197a3be30797014b5dae
Tags
upx evasion
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

daca4dfea716ff4d698330910a45df0cb0697c7910f0197a3be30797014b5dae

Threat Level: Known bad

The file daca4dfea716ff4d698330910a45df0cb0697c7910f0197a3be30797014b5dae was found to be: Known bad.

Malicious Activity Summary

upx evasion

UPX dump on OEP (original entry point)

Detects Windows executables referencing non-Windows User-Agents

Detects Windows executables referencing non-Windows User-Agents

UPX dump on OEP (original entry point)

Sets file to hidden

UPX packed file

Checks computer location settings

Deletes itself

Executes dropped EXE

Drops file in Windows directory

Unsigned PE

Enumerates physical storage devices

Views/modifies file attributes

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-06-01 04:01

Signatures

Detects Windows executables referencing non-Windows User-Agents

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

UPX dump on OEP (original entry point)

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

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-06-01 04:01

Reported

2024-06-01 04:04

Platform

win7-20240508-en

Max time kernel

144s

Max time network

144s

Command Line

"C:\Users\Admin\AppData\Local\Temp\daca4dfea716ff4d698330910a45df0cb0697c7910f0197a3be30797014b5dae.exe"

Signatures

Detects Windows executables referencing non-Windows User-Agents

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

UPX dump on OEP (original entry point)

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

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

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\daca4dfea716ff4d698330910a45df0cb0697c7910f0197a3be30797014b5dae.exe N/A
File opened for modification C:\Windows\Debug\ayahost.exe C:\Users\Admin\AppData\Local\Temp\daca4dfea716ff4d698330910a45df0cb0697c7910f0197a3be30797014b5dae.exe N/A
File opened for modification C:\Windows\Debug\ayahost.exe C:\Windows\SysWOW64\attrib.exe N/A

Enumerates physical storage devices

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\daca4dfea716ff4d698330910a45df0cb0697c7910f0197a3be30797014b5dae.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\daca4dfea716ff4d698330910a45df0cb0697c7910f0197a3be30797014b5dae.exe

"C:\Users\Admin\AppData\Local\Temp\daca4dfea716ff4d698330910a45df0cb0697c7910f0197a3be30797014b5dae.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\DACA4D~1.EXE > nul

Network

Country Destination Domain Proto
US 8.8.8.8:53 www.baidu.com udp
CN 183.240.99.24:80 www.baidu.com tcp
US 8.8.8.8:53 p03yIxkQ1T.nnnn.eu.org udp
US 8.8.8.8:53 PCk3REXF.nnnn.eu.org udp
US 8.8.8.8:53 zsRLLPhfzP.nnnn.eu.org udp
US 8.8.8.8:53 ZYcXctHid.nnnn.eu.org udp
US 8.8.8.8:53 9FJiNqePSL.nnnn.eu.org udp

Files

memory/836-0-0x0000000000400000-0x0000000000416000-memory.dmp

C:\Windows\Debug\ayahost.exe

MD5 e16ff1cb124edb1059a7736d237b7a08
SHA1 4933f98db82e6988253ac52112f6fd427a8fb27f
SHA256 872877acfad650f0d9d97fbe48f1656feb49b09306fb74de05abc7e589585856
SHA512 ecfb3f84f5595830470dc49ea3b8a513126c42e1435fe2ebaed80a8233c8ef78816be6ce2755d98a935cb651e9ae72bff596b8224bb21031fd09746ea6cd43ee

memory/836-5-0x0000000000400000-0x0000000000416000-memory.dmp

memory/2132-6-0x0000000000400000-0x0000000000416000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-01 04:01

Reported

2024-06-01 04:04

Platform

win10v2004-20240508-en

Max time kernel

144s

Max time network

145s

Command Line

"C:\Users\Admin\AppData\Local\Temp\daca4dfea716ff4d698330910a45df0cb0697c7910f0197a3be30797014b5dae.exe"

Signatures

Detects Windows executables referencing non-Windows User-Agents

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

UPX dump on OEP (original entry point)

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

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-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\daca4dfea716ff4d698330910a45df0cb0697c7910f0197a3be30797014b5dae.exe N/A

Executes dropped EXE

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

Drops file in Windows directory

Description Indicator Process Target
File opened for modification C:\Windows\Debug\egkhost.exe C:\Windows\SysWOW64\attrib.exe N/A
File created C:\Windows\Debug\egkhost.exe C:\Users\Admin\AppData\Local\Temp\daca4dfea716ff4d698330910a45df0cb0697c7910f0197a3be30797014b5dae.exe N/A
File opened for modification C:\Windows\Debug\egkhost.exe C:\Users\Admin\AppData\Local\Temp\daca4dfea716ff4d698330910a45df0cb0697c7910f0197a3be30797014b5dae.exe N/A

Enumerates physical storage devices

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\daca4dfea716ff4d698330910a45df0cb0697c7910f0197a3be30797014b5dae.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\daca4dfea716ff4d698330910a45df0cb0697c7910f0197a3be30797014b5dae.exe

"C:\Users\Admin\AppData\Local\Temp\daca4dfea716ff4d698330910a45df0cb0697c7910f0197a3be30797014b5dae.exe"

C:\Windows\SysWOW64\attrib.exe

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

C:\Windows\Debug\egkhost.exe

C:\Windows\Debug\egkhost.exe

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\system32\cmd.exe" /c del C:\Users\Admin\AppData\Local\Temp\DACA4D~1.EXE > nul

Network

Country Destination Domain Proto
US 8.8.8.8:53 241.150.49.20.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 0.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 www.baidu.com udp
CN 183.240.99.24:80 www.baidu.com tcp
NL 23.62.61.97:443 www.bing.com tcp
US 8.8.8.8:53 97.61.62.23.in-addr.arpa udp
US 8.8.8.8:53 183.142.211.20.in-addr.arpa udp
US 8.8.8.8:53 p03yIxkQ1T.nnnn.eu.org udp
US 8.8.8.8:53 26.165.165.52.in-addr.arpa udp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
US 8.8.8.8:53 S2slQlQKZ1.nnnn.eu.org udp
US 8.8.8.8:53 82.90.14.23.in-addr.arpa udp
US 8.8.8.8:53 2j3whjuSIF.nnnn.eu.org udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 43.58.199.20.in-addr.arpa udp
US 8.8.8.8:53 cvk8TDN42T.nnnn.eu.org udp
US 8.8.8.8:53 CbwJkrm.nnnn.eu.org udp

Files

memory/800-0-0x0000000000400000-0x0000000000416000-memory.dmp

C:\Windows\Debug\egkhost.exe

MD5 7cfc923037eb277c91f139e3f2540c99
SHA1 6837710d5ae670183571ad9b75c71565e7811f3d
SHA256 992b723ade16bab81e8fa91ea7355594526f4c64fa90db254d653e61e55f987b
SHA512 1164e33db39c94fdf399d27aa8e8f34189e21af4129eb222eca2e72710d7a5324cc82052f7db6e76c77b9c9aa2e67b974edd29141a43c74a059909c15f36addc

memory/800-5-0x0000000000400000-0x0000000000416000-memory.dmp

memory/1364-6-0x0000000000400000-0x0000000000416000-memory.dmp