matiex | 1b282409371bffd8a0958cfc23fec3f6df136c72f43471ac913f9b904c7a4687

Analysis

max time kernel
48s
max time network
170s
platform
windows7_x64
resource
win7-20220414-en
submitted
20-05-2022 22:47

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General

Target

Payment receipt.exe
Size

4.9MB
MD5

21ce722319d2e436a23302c488c8e474
SHA1

8926922f8a66a95200513918c5370b3bef143be9
SHA256

c9e3b73cd0bfb2a80b1ac9b3e45272975bdac5ed76ac3f9a5a2e963d82370cca
SHA512

2fe3408605227f45b4cd11e2eb502aa9806665433c3144c93c0c2ef4580de9d755602f232d83c111b9d7e5399c8f080743abda332a77ae107842bac1910df0d7

Score

10^/10

matiex collection evasion keylogger persistence spyware stealer trojan

Malware Config

Signatures

Matiex
Matiex is a keylogger and infostealer first seen in July 2020.
stealer keylogger matiex

Matiex Main Payload 7 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1156-55-0x0000000000B20000-0x0000000000BB0000-memory.dmp	family_matiex
behavioral1/memory/2028-66-0x000000000046BF3E-mapping.dmp	family_matiex
behavioral1/memory/2028-68-0x0000000000400000-0x0000000000470000-memory.dmp	family_matiex
behavioral1/memory/2028-70-0x0000000000400000-0x0000000000470000-memory.dmp	family_matiex
behavioral1/memory/2028-65-0x0000000000400000-0x0000000000470000-memory.dmp	family_matiex
behavioral1/memory/2028-64-0x0000000000400000-0x0000000000470000-memory.dmp	family_matiex
behavioral1/memory/2028-63-0x0000000000400000-0x0000000000470000-memory.dmp	family_matiex

Modifies WinLogon for persistence 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1004

Modify Registry

T1112

Processes:

Payment receipt.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\shell = "explorer.exe,\"C:\\Users\\Admin\\AppData\\Local\\Temp\\Payment receipt.exe\""	Payment receipt.exe

Modifies Windows Defender Real-time Protection settings 3 TTPs
evasion trojan

Modify Registry
T1112

Modify Existing Service
T1031

Disabling Security Tools
T1089

Drops startup file 2 IoCs

Processes:

Payment receipt.exe

description	ioc	process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Payment receipt.exe	Payment receipt.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Payment receipt.exe	Payment receipt.exe

Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081
Reads user/profile data of local email clients 2 TTPs
Email clients store some user data on disk where infostealers will often target it.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081

Windows security modification 2 TTPs 2 IoCs

evasion trojan

Disabling Security Tools

T1089

Modify Registry

T1112

Processes:

Payment receipt.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows Defender\Features	Payment receipt.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows Defender\Features\TamperProtection = "0"	Payment receipt.exe

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

Processes:

Payment receipt.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Payment receipt.exe
Key opened	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Payment receipt.exe
Key opened	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Payment receipt.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

Payment receipt.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Windows\CurrentVersion\Run\Payment receipt.exe = "C:\\Users\\Admin\\AppData\\Local\\Temp\\Payment receipt.exe"	Payment receipt.exe

Looks up external IP address via web service 3 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.

Processes:

flow ioc

9 freegeoip.app
10 freegeoip.app
3 checkip.dyndns.org
Suspicious use of SetThreadContext 1 IoCs

Processes:

Payment receipt.exe

description pid process target process

PID 1156 set thread context of 2028 1156 Payment receipt.exe Payment receipt.exe
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

powershell.exe

pid process

1548 powershell.exe

flow	ioc
9	freegeoip.app
10	freegeoip.app
3	checkip.dyndns.org

description	pid	process	target process
PID 1156 set thread context of 2028	1156	Payment receipt.exe	Payment receipt.exe

pid	process
1548	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

powershell.exePayment receipt.exePayment receipt.exe

description	pid	process
Token: SeDebugPrivilege	1548	powershell.exe
Token: SeDebugPrivilege	1156	Payment receipt.exe
Token: SeDebugPrivilege	2028	Payment receipt.exe

Suspicious use of WriteProcessMemory 13 IoCs

Processes:

Payment receipt.exe

description	pid	process	target process
PID 1156 wrote to memory of 1548	1156	Payment receipt.exe	powershell.exe
PID 1156 wrote to memory of 1548	1156	Payment receipt.exe	powershell.exe
PID 1156 wrote to memory of 1548	1156	Payment receipt.exe	powershell.exe
PID 1156 wrote to memory of 1548	1156	Payment receipt.exe	powershell.exe
PID 1156 wrote to memory of 2028	1156	Payment receipt.exe	Payment receipt.exe
PID 1156 wrote to memory of 2028	1156	Payment receipt.exe	Payment receipt.exe
PID 1156 wrote to memory of 2028	1156	Payment receipt.exe	Payment receipt.exe
PID 1156 wrote to memory of 2028	1156	Payment receipt.exe	Payment receipt.exe
PID 1156 wrote to memory of 2028	1156	Payment receipt.exe	Payment receipt.exe
PID 1156 wrote to memory of 2028	1156	Payment receipt.exe	Payment receipt.exe
PID 1156 wrote to memory of 2028	1156	Payment receipt.exe	Payment receipt.exe
PID 1156 wrote to memory of 2028	1156	Payment receipt.exe	Payment receipt.exe
PID 1156 wrote to memory of 2028	1156	Payment receipt.exe	Payment receipt.exe

outlook_office_path 1 IoCs

Processes:

Payment receipt.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Payment receipt.exe

outlook_win_path 1 IoCs

Processes:

Payment receipt.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Payment receipt.exe

C:\Users\Admin\AppData\Local\Temp\Payment receipt.exe
"C:\Users\Admin\AppData\Local\Temp\Payment receipt.exe"
1⤵
- Modifies WinLogon for persistence
- Drops startup file
- Windows security modification
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1156

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
"powershell" Get-MpPreference -verbose
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1548

C:\Users\Admin\AppData\Local\Temp\Payment receipt.exe
"C:\Users\Admin\AppData\Local\Temp\Payment receipt.exe"
2⤵
- Accesses Microsoft Outlook profiles
- Suspicious use of AdjustPrivilegeToken
- outlook_office_path
- outlook_win_path
PID:2028

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Winlogon Helper DLL

T1004

Modify Existing Service

T1031

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Disabling Security Tools

T1089

Credential Access

Credentials in Files

T1081

Discovery

Lateral Movement

Collection

Data from Local System

T1005

Email Collection

T1114

Exfiltration

Command and Control

Impact

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Downloads

memory/1156-54-0x0000000000BD0000-0x00000000010C8000-memory.dmp

Filesize
5.0MB

Download
memory/1156-55-0x0000000000B20000-0x0000000000BB0000-memory.dmp

Filesize
576KB

Download
memory/1156-56-0x0000000074F91000-0x0000000074F93000-memory.dmp

Filesize
8KB

Download
memory/1548-57-0x0000000000000000-mapping.dmp

Download
memory/1548-59-0x000000006F9F0000-0x000000006FF9B000-memory.dmp

Filesize
5.7MB

Download
memory/2028-60-0x0000000000400000-0x0000000000470000-memory.dmp

Filesize
448KB

Download
memory/2028-66-0x000000000046BF3E-mapping.dmp

Download
memory/2028-68-0x0000000000400000-0x0000000000470000-memory.dmp

Filesize
448KB

Download
memory/2028-70-0x0000000000400000-0x0000000000470000-memory.dmp

Filesize
448KB

Download
memory/2028-65-0x0000000000400000-0x0000000000470000-memory.dmp

Filesize
448KB

Download
memory/2028-64-0x0000000000400000-0x0000000000470000-memory.dmp

Filesize
448KB

Download
memory/2028-63-0x0000000000400000-0x0000000000470000-memory.dmp

Filesize
448KB

Download
memory/2028-61-0x0000000000400000-0x0000000000470000-memory.dmp

Filesize
448KB

Download