Malware Analysis Report

2025-03-14 22:30

Sample ID 240304-rceq8abh6v
Target b24f3629767e95aa88e064dbe3480f9a
SHA256 e920922b09518fb34a15c2dcb673c66a1034de0463f5400270da6dfeab381202
Tags
upx 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

e920922b09518fb34a15c2dcb673c66a1034de0463f5400270da6dfeab381202

Threat Level: Shows suspicious behavior

The file b24f3629767e95aa88e064dbe3480f9a was found to be: Shows suspicious behavior.

Malicious Activity Summary

upx persistence spyware stealer

UPX packed file

Executes dropped EXE

Loads dropped DLL

Reads user/profile data of web browsers

Adds Run key to start application

Drops file in Windows directory

Unsigned PE

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-03-04 14:02

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

2024-03-04 14:02

Reported

2024-03-04 14:05

Platform

win7-20240221-en

Max time kernel

141s

Max time network

121s

Command Line

"C:\Users\Admin\AppData\Local\Temp\b24f3629767e95aa88e064dbe3480f9a.exe"

Signatures

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\53bTumaGm3J5GNT.exe N/A
N/A N/A C:\Windows\CTS.exe N/A

Reads user/profile data of web browsers

spyware stealer

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

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:\Windows\CTS.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" C:\Users\Admin\AppData\Local\Temp\b24f3629767e95aa88e064dbe3480f9a.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\CTS.exe C:\Users\Admin\AppData\Local\Temp\b24f3629767e95aa88e064dbe3480f9a.exe N/A
File created C:\Windows\CTS.exe C:\Windows\CTS.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\b24f3629767e95aa88e064dbe3480f9a.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\CTS.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\b24f3629767e95aa88e064dbe3480f9a.exe

"C:\Users\Admin\AppData\Local\Temp\b24f3629767e95aa88e064dbe3480f9a.exe"

C:\Users\Admin\AppData\Local\Temp\53bTumaGm3J5GNT.exe

C:\Users\Admin\AppData\Local\Temp\53bTumaGm3J5GNT.exe

C:\Windows\CTS.exe

"C:\Windows\CTS.exe"

Network

N/A

Files

memory/2120-0-0x0000000000B60000-0x0000000000B77000-memory.dmp

\Users\Admin\AppData\Local\Temp\53bTumaGm3J5GNT.exe

MD5 95c9a037d3b01a21275aa6cc73b122a2
SHA1 c19ed8afc95b91d0cc6bc075047de30eae015386
SHA256 1d5edcbae3258efb07cc57ba8d7cd1ebe2eb5106ef1a894b787ed2857952c523
SHA512 761bb76261712a597f610e3162fa1514d2f56d69d03d1b76b51c6b2a7b0c88bbd385b7dc849c6913f7d861fb3aed8551f26f640d90b621e8629abe2e4bfb6160

memory/2120-13-0x0000000000B60000-0x0000000000B77000-memory.dmp

C:\Windows\CTS.exe

MD5 93e5f18caebd8d4a2c893e40e5f38232
SHA1 fd55c4e6bcd108bce60ea719c06dc9c4d0adafa6
SHA256 a66c4b98becac2f69cb107cd087d7a2ca9ef511bc3b83367b1f440f11dd159a8
SHA512 986583610d27caae2080834301d072557c5d2c85e33f0d19ab1245d7eae8db146397461572ddb3d491be16f3af210720d54267dac838fdad8fe34afa3d6b7f54

memory/2120-14-0x00000000000E0000-0x00000000000F7000-memory.dmp

memory/2124-17-0x0000000001220000-0x0000000001237000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\53bTumaGm3J5GNT.exe

MD5 58d54f6ef0962ac67f3bba4fafc2816a
SHA1 0b7771bcc6d7fa94ec8528906e738f5bc1d35f9c
SHA256 de85059eb7583ccf4b76dcc2bea00219c7c4bc59dc54f5ffba3fa1bc11725237
SHA512 e2cdbd15b3a80698997c700c87bebd0a4c3be9219344aa92fc3264fbb905bd9010645bd5c43adcc40a3df49dcb41c3e91ce97858002cd02a9693f83cf8eb50d3

Analysis: behavioral2

Detonation Overview

Submitted

2024-03-04 14:02

Reported

2024-03-04 14:05

Platform

win10v2004-20240226-en

Max time kernel

142s

Max time network

144s

Command Line

"C:\Users\Admin\AppData\Local\Temp\b24f3629767e95aa88e064dbe3480f9a.exe"

Signatures

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\TopkhXiSrLju4Jw.exe N/A
N/A N/A C:\Windows\CTS.exe N/A

Reads user/profile data of web browsers

spyware stealer

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

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\b24f3629767e95aa88e064dbe3480f9a.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

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\CTS.exe C:\Users\Admin\AppData\Local\Temp\b24f3629767e95aa88e064dbe3480f9a.exe N/A
File created C:\Windows\CTS.exe C:\Windows\CTS.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\b24f3629767e95aa88e064dbe3480f9a.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\CTS.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\b24f3629767e95aa88e064dbe3480f9a.exe

"C:\Users\Admin\AppData\Local\Temp\b24f3629767e95aa88e064dbe3480f9a.exe"

C:\Users\Admin\AppData\Local\Temp\TopkhXiSrLju4Jw.exe

C:\Users\Admin\AppData\Local\Temp\TopkhXiSrLju4Jw.exe

C:\Windows\CTS.exe

"C:\Windows\CTS.exe"

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe

"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=4392 --field-trial-handle=2972,i,4036376905309803364,5412922217215781933,262144 --variations-seed-version /prefetch:8

Network

Country Destination Domain Proto
US 8.8.8.8:53 17.160.190.20.in-addr.arpa udp
US 8.8.8.8:53 9.228.82.20.in-addr.arpa udp
US 8.8.8.8:53 173.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 41.110.16.96.in-addr.arpa udp
US 8.8.8.8:53 88.156.103.20.in-addr.arpa udp
US 138.91.171.81:80 tcp
US 8.8.8.8:53 21.236.111.52.in-addr.arpa udp
US 8.8.8.8:53 157.123.68.40.in-addr.arpa udp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp
US 8.8.8.8:53 217.135.221.88.in-addr.arpa udp
US 8.8.8.8:53 chromewebstore.googleapis.com udp
US 8.8.8.8:53 chromewebstore.googleapis.com udp
GB 142.250.200.10:443 chromewebstore.googleapis.com tcp
US 8.8.8.8:53 79.121.231.20.in-addr.arpa udp
US 8.8.8.8:53 175.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 172.178.17.96.in-addr.arpa udp

Files

memory/3192-0-0x00000000002A0000-0x00000000002B7000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\TopkhXiSrLju4Jw.exe

MD5 95c9a037d3b01a21275aa6cc73b122a2
SHA1 c19ed8afc95b91d0cc6bc075047de30eae015386
SHA256 1d5edcbae3258efb07cc57ba8d7cd1ebe2eb5106ef1a894b787ed2857952c523
SHA512 761bb76261712a597f610e3162fa1514d2f56d69d03d1b76b51c6b2a7b0c88bbd385b7dc849c6913f7d861fb3aed8551f26f640d90b621e8629abe2e4bfb6160

C:\Windows\CTS.exe

MD5 93e5f18caebd8d4a2c893e40e5f38232
SHA1 fd55c4e6bcd108bce60ea719c06dc9c4d0adafa6
SHA256 a66c4b98becac2f69cb107cd087d7a2ca9ef511bc3b83367b1f440f11dd159a8
SHA512 986583610d27caae2080834301d072557c5d2c85e33f0d19ab1245d7eae8db146397461572ddb3d491be16f3af210720d54267dac838fdad8fe34afa3d6b7f54

memory/3192-8-0x00000000002A0000-0x00000000002B7000-memory.dmp

memory/1800-9-0x00000000001C0000-0x00000000001D7000-memory.dmp

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

MD5 c6bb5f16e2c24d0f96a2956f58f80148
SHA1 65d07c3ab62a91bb6be36f7fd7b9ecff8bac596d
SHA256 bb3f5b1d532db732912109070d8208ecaeff1a0dce59a16cf2015df20bb25071
SHA512 f8b5a3eac7570a842d67d2ea01e12c2ab5dd12bda0f68816df1e4c805efdd212b83beec071febce6493dec22a29e7262a50ec86243bea411bcc23bb2e8b522b0