Malware Analysis Report

2024-11-15 06:11

Sample ID 240407-3q6mmsab2s
Target 99efa583e66941a2dd8c17d983876d4fe35de92e7be0b8d696c43580d129e1af
SHA256 99efa583e66941a2dd8c17d983876d4fe35de92e7be0b8d696c43580d129e1af
Tags
persistence spyware stealer upx
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

99efa583e66941a2dd8c17d983876d4fe35de92e7be0b8d696c43580d129e1af

Threat Level: Known bad

The file 99efa583e66941a2dd8c17d983876d4fe35de92e7be0b8d696c43580d129e1af was found to be: Known bad.

Malicious Activity Summary

persistence spyware stealer upx

UPX dump on OEP (original entry point)

UPX dump on OEP (original entry point)

Executes dropped EXE

Reads user/profile data of web browsers

UPX packed file

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

2024-04-07 23:44

Signatures

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-04-07 23:44

Reported

2024-04-07 23:46

Platform

win7-20240319-en

Max time kernel

141s

Max time network

122s

Command Line

"C:\Users\Admin\AppData\Local\Temp\99efa583e66941a2dd8c17d983876d4fe35de92e7be0b8d696c43580d129e1af.exe"

Signatures

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

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

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

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\99efa583e66941a2dd8c17d983876d4fe35de92e7be0b8d696c43580d129e1af.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\99efa583e66941a2dd8c17d983876d4fe35de92e7be0b8d696c43580d129e1af.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\99efa583e66941a2dd8c17d983876d4fe35de92e7be0b8d696c43580d129e1af.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\CTS.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\99efa583e66941a2dd8c17d983876d4fe35de92e7be0b8d696c43580d129e1af.exe

"C:\Users\Admin\AppData\Local\Temp\99efa583e66941a2dd8c17d983876d4fe35de92e7be0b8d696c43580d129e1af.exe"

C:\Windows\CTS.exe

"C:\Windows\CTS.exe"

Network

N/A

Files

memory/1600-0-0x0000000000E10000-0x0000000000E27000-memory.dmp

memory/1600-4-0x0000000000070000-0x0000000000087000-memory.dmp

C:\Windows\CTS.exe

MD5 286211b8e0aad0533c45d8b8c351cc70
SHA1 cb54a305a566c00742fb972c4ee62266e880ea78
SHA256 1955407b2fd523e375303d560b987216b95105b421a8471218c0b65ceba847f3
SHA512 91eddd484a40aee3a7a9254fd6843b3d9dd455e6a2c4d685d499ab1704d8644a6dc604ad14449e96b0754ae3e6c1c14c16d068605aa4e39840e0421aa7a4be35

memory/1600-12-0x0000000000070000-0x0000000000087000-memory.dmp

memory/2920-13-0x0000000000FD0000-0x0000000000FE7000-memory.dmp

memory/1600-10-0x0000000000E10000-0x0000000000E27000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\HDSIydjWGXne9Va.exe

MD5 81d787bcda4e33d069708211f44336ea
SHA1 165797c65a15336d4062a7c4b4a22366f4f9f872
SHA256 ff31cdb7c3577dba99ac67d10903687dfa2f9580539d4269c4e149db04b07dbd
SHA512 e4c1514cbd46d0de2dd08e42fe7f5f2b1b0b55724f15d898debf0050476b98de3cf98b094cb210ae6b2f776faea540902501a6500f653124a6e7d8ed75792d4d

memory/1600-21-0x0000000000070000-0x0000000000087000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-04-07 23:44

Reported

2024-04-07 23:46

Platform

win10v2004-20240226-en

Max time kernel

142s

Max time network

142s

Command Line

"C:\Users\Admin\AppData\Local\Temp\99efa583e66941a2dd8c17d983876d4fe35de92e7be0b8d696c43580d129e1af.exe"

Signatures

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

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

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

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\99efa583e66941a2dd8c17d983876d4fe35de92e7be0b8d696c43580d129e1af.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\99efa583e66941a2dd8c17d983876d4fe35de92e7be0b8d696c43580d129e1af.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\99efa583e66941a2dd8c17d983876d4fe35de92e7be0b8d696c43580d129e1af.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\CTS.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\99efa583e66941a2dd8c17d983876d4fe35de92e7be0b8d696c43580d129e1af.exe

"C:\Users\Admin\AppData\Local\Temp\99efa583e66941a2dd8c17d983876d4fe35de92e7be0b8d696c43580d129e1af.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=760 --field-trial-handle=2276,i,1205556100727695622,5044463180471657307,262144 --variations-seed-version /prefetch:8

Network

Country Destination Domain Proto
US 8.8.8.8:53 228.249.119.40.in-addr.arpa udp
US 8.8.8.8:53 36.56.20.217.in-addr.arpa udp
US 8.8.8.8:53 17.160.190.20.in-addr.arpa udp
US 8.8.8.8:53 58.55.71.13.in-addr.arpa udp
US 8.8.8.8:53 103.169.127.40.in-addr.arpa udp
US 8.8.8.8:53 56.126.166.20.in-addr.arpa udp
US 8.8.8.8:53 130.118.77.104.in-addr.arpa udp
US 13.107.253.64:443 tcp
US 8.8.8.8:53 43.56.20.217.in-addr.arpa udp
US 8.8.8.8:53 98.56.20.217.in-addr.arpa udp

Files

memory/4364-0-0x00000000005C0000-0x00000000005D7000-memory.dmp

C:\Windows\CTS.exe

MD5 286211b8e0aad0533c45d8b8c351cc70
SHA1 cb54a305a566c00742fb972c4ee62266e880ea78
SHA256 1955407b2fd523e375303d560b987216b95105b421a8471218c0b65ceba847f3
SHA512 91eddd484a40aee3a7a9254fd6843b3d9dd455e6a2c4d685d499ab1704d8644a6dc604ad14449e96b0754ae3e6c1c14c16d068605aa4e39840e0421aa7a4be35

memory/4364-6-0x00000000005C0000-0x00000000005D7000-memory.dmp

memory/3388-8-0x0000000000130000-0x0000000000147000-memory.dmp

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

MD5 8dd6b7bea58e828ba83664e97517d2b3
SHA1 570d5859ef904e1ccfd8a5099c610112af5b1846
SHA256 f9fa35a38a5cd40a9be1737ed6fd53d7a26ef74590d2e80ba24dac487e2c6b3d
SHA512 814e7a73b0280e139e0ee4ff8cfab822e142ba575d3efb4612c8369be5230e115bf25c545636091b30de4098ac693b7d93e8238845830d2e654e44bde574ec11

C:\Users\Admin\AppData\Local\Temp\fkN11rRNfm4VVt7.exe

MD5 f8f8c93eac92cd71e178137ccef9ef55
SHA1 af3dde6566485eeaeec26de3908d3098354369a0
SHA256 f992a996512c53eb0c51ba0ed95825826ca45d516eb960233cc8e8aec306eb2b
SHA512 b330b26413300c7f727b86f7cb5550780d0151b306b3ed169889fca8b2b069d46eb408756d24033bacff2eacb8fa30fd09c6390be4f5a94e66d89145a7bc8a7c

memory/3388-30-0x0000000000130000-0x0000000000147000-memory.dmp