Malware Analysis Report

2025-01-22 08:42

Sample ID 241027-sxpycsyfnc
Target 5fb385e73a8369c1a3ede662b561c623e166f3180be77fb2c5c96c2e573c9863N
SHA256 5fb385e73a8369c1a3ede662b561c623e166f3180be77fb2c5c96c2e573c9863
Tags
upx discovery persistence spyware stealer
score
7/10

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
7/10

SHA256

5fb385e73a8369c1a3ede662b561c623e166f3180be77fb2c5c96c2e573c9863

Threat Level: Shows suspicious behavior

The file 5fb385e73a8369c1a3ede662b561c623e166f3180be77fb2c5c96c2e573c9863N was found to be: Shows suspicious behavior.

Malicious Activity Summary

upx discovery persistence spyware stealer

Executes dropped EXE

Reads user/profile data of web browsers

Adds Run key to start application

UPX packed file

Drops file in Windows directory

System Location Discovery: System Language Discovery

Unsigned PE

Suspicious use of WriteProcessMemory

Suspicious use of AdjustPrivilegeToken

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-10-27 15:30

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

2024-10-27 15:30

Reported

2024-10-27 15:32

Platform

win7-20241010-en

Max time kernel

117s

Max time network

118s

Command Line

"C:\Users\Admin\AppData\Local\Temp\5fb385e73a8369c1a3ede662b561c623e166f3180be77fb2c5c96c2e573c9863N.exe"

Signatures

Executes dropped EXE

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

Reads user/profile data of web browsers

spyware stealer

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" C:\Users\Admin\AppData\Local\Temp\5fb385e73a8369c1a3ede662b561c623e166f3180be77fb2c5c96c2e573c9863N.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" C:\Windows\CTS.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
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\CTS.exe C:\Users\Admin\AppData\Local\Temp\5fb385e73a8369c1a3ede662b561c623e166f3180be77fb2c5c96c2e573c9863N.exe N/A
File created C:\Windows\CTS.exe C:\Windows\CTS.exe N/A

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\5fb385e73a8369c1a3ede662b561c623e166f3180be77fb2c5c96c2e573c9863N.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\5fb385e73a8369c1a3ede662b561c623e166f3180be77fb2c5c96c2e573c9863N.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\CTS.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\5fb385e73a8369c1a3ede662b561c623e166f3180be77fb2c5c96c2e573c9863N.exe

"C:\Users\Admin\AppData\Local\Temp\5fb385e73a8369c1a3ede662b561c623e166f3180be77fb2c5c96c2e573c9863N.exe"

C:\Windows\CTS.exe

"C:\Windows\CTS.exe"

Network

N/A

Files

memory/2288-0-0x00000000009E0000-0x00000000009F7000-memory.dmp

C:\Windows\CTS.exe

MD5 93e5f18caebd8d4a2c893e40e5f38232
SHA1 fd55c4e6bcd108bce60ea719c06dc9c4d0adafa6
SHA256 a66c4b98becac2f69cb107cd087d7a2ca9ef511bc3b83367b1f440f11dd159a8
SHA512 986583610d27caae2080834301d072557c5d2c85e33f0d19ab1245d7eae8db146397461572ddb3d491be16f3af210720d54267dac838fdad8fe34afa3d6b7f54

memory/2908-12-0x0000000000890000-0x00000000008A7000-memory.dmp

memory/2288-9-0x00000000009E0000-0x00000000009F7000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\w3kLyStUMCrEYT8.exe

MD5 e3a59b2d71549010faaad2aa674a7c46
SHA1 8d1c1a1e1b13e1ae38beb9269a9f42e25cdb3aff
SHA256 d025f43ca1c491f453883a7871ffa5468b1ea5588a341cd898354dac1203af65
SHA512 f53efd0ce4200b87f98b15b5e33f0163ea1fb0851d675bc8278107e820e48761a2ebdb216865e689d7a17a8918739d9f0d6adfbf346608fa8d81a292650d9ccc

memory/2908-17-0x0000000000890000-0x00000000008A7000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-10-27 15:30

Reported

2024-10-27 15:32

Platform

win10v2004-20241007-en

Max time kernel

110s

Max time network

108s

Command Line

"C:\Users\Admin\AppData\Local\Temp\5fb385e73a8369c1a3ede662b561c623e166f3180be77fb2c5c96c2e573c9863N.exe"

Signatures

Executes dropped EXE

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

Reads user/profile data of web browsers

spyware stealer

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" C:\Users\Admin\AppData\Local\Temp\5fb385e73a8369c1a3ede662b561c623e166f3180be77fb2c5c96c2e573c9863N.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" C:\Windows\CTS.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
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\CTS.exe C:\Users\Admin\AppData\Local\Temp\5fb385e73a8369c1a3ede662b561c623e166f3180be77fb2c5c96c2e573c9863N.exe N/A
File created C:\Windows\CTS.exe C:\Windows\CTS.exe N/A

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\5fb385e73a8369c1a3ede662b561c623e166f3180be77fb2c5c96c2e573c9863N.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\CTS.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\5fb385e73a8369c1a3ede662b561c623e166f3180be77fb2c5c96c2e573c9863N.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\CTS.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\5fb385e73a8369c1a3ede662b561c623e166f3180be77fb2c5c96c2e573c9863N.exe

"C:\Users\Admin\AppData\Local\Temp\5fb385e73a8369c1a3ede662b561c623e166f3180be77fb2c5c96c2e573c9863N.exe"

C:\Windows\CTS.exe

"C:\Windows\CTS.exe"

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 79.190.18.2.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 8.8.8.8:53 136.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 10.28.171.150.in-addr.arpa udp
US 8.8.8.8:53 228.249.119.40.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 69.190.18.2.in-addr.arpa udp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
US 8.8.8.8:53 14.227.111.52.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp

Files

memory/3780-0-0x0000000000300000-0x0000000000317000-memory.dmp

C:\Windows\CTS.exe

MD5 93e5f18caebd8d4a2c893e40e5f38232
SHA1 fd55c4e6bcd108bce60ea719c06dc9c4d0adafa6
SHA256 a66c4b98becac2f69cb107cd087d7a2ca9ef511bc3b83367b1f440f11dd159a8
SHA512 986583610d27caae2080834301d072557c5d2c85e33f0d19ab1245d7eae8db146397461572ddb3d491be16f3af210720d54267dac838fdad8fe34afa3d6b7f54

memory/1152-7-0x0000000000AA0000-0x0000000000AB7000-memory.dmp

memory/3780-10-0x0000000000300000-0x0000000000317000-memory.dmp

C:\Users\Admin\AppData\Local\Microsoft\Office\16.0\excel.exe_Rules.xml

MD5 5623778f9171b793dc8f383c03e5df2a
SHA1 86067a42acf7a240325f9bdfda9a9099e1e5a39f
SHA256 4d13a8b15024546bafb3365451836a09345d79d3367174d27ea7d3711c502e2e
SHA512 6108d037df08c03b6eab464f6416571119eaacaa95f3ed39f0096d6a0c8db1a8ccec0aceeb6af85852101d4483c914538d7b6798bac6ca3e1f3c02719cbdbed7

C:\Users\Admin\AppData\Local\Temp\yssFx8VLTBwMC3V.exe

MD5 f7de2f9f9bda3d533113138a9b272f18
SHA1 f66a0f305711959f1dfec1b71a699be809bf3d4c
SHA256 3bad13e501c98b699de22e05a3d3ab0edf9737a5266efc8c9ba4bf187baeb7bd
SHA512 ab2066172fcb4905317c49e473d1efe9cf9f023600f37a1f09a1934de61b9b656286be5495987f95ae8141d0f56d39bc39d367c58b055c3f38cd0073c6382011

memory/1152-33-0x0000000000AA0000-0x0000000000AB7000-memory.dmp