matiex | 0a6959c181966748ce98202d123ed479ce076b6d4db9eae9d2cbb62ac42dca49

General

Target

invoice _25280.exe
Size

739KB
MD5

40630dbc9ec33244bf5dd0a97d129909
SHA1

a48f654aada97d4d359e217bfa212adf07faba13
SHA256

f0b8f39cd0fd0a840db7c970362e5bd1e48600c341a97ffd1f742ea37f561bd8
SHA512

854c4e2b1dcabe82001d3f31cf7c41045eab6ba1a7c14027de6ce781df097cb70ff4dff39cea5d26f2c2789953683c10fe0a0fe4d5f8aabad00920434491c1af

Score

10^/10

matiex collection keylogger spyware stealer

Malware Config

Extracted

Family

matiex

Credentials

Protocol: smtp
Host:
ebop.website
Port:
587
Username:
[email protected]
Password:
P@ssw0rdP@ssw0rd

Signatures

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

Matiex Main Payload 1 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1640-60-0x0000000000400000-0x0000000000472000-memory.dmp	family_matiex

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

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

Processes:

RegAsm.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-790309383-526510583-3802439154-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe
Key opened	\REGISTRY\USER\S-1-5-21-790309383-526510583-3802439154-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe
Key opened	\REGISTRY\USER\S-1-5-21-790309383-526510583-3802439154-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.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

3 checkip.dyndns.org
7 freegeoip.app
8 freegeoip.app
Suspicious use of SetThreadContext 1 IoCs

Processes:

invoice _25280.exe

description pid process target process

PID 1156 set thread context of 1640 1156 invoice _25280.exe RegAsm.exe
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

RegAsm.exe

pid process

1640 RegAsm.exe
Suspicious behavior: MapViewOfSection 2 IoCs

Processes:

invoice _25280.exe

pid process

1156 invoice _25280.exe
1156 invoice _25280.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

RegAsm.exe

description pid process

Token: SeDebugPrivilege 1640 RegAsm.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

RegAsm.exe

pid process

1640 RegAsm.exe

flow	ioc
3	checkip.dyndns.org
7	freegeoip.app
8	freegeoip.app

description	pid	process	target process
PID 1156 set thread context of 1640	1156	invoice _25280.exe	RegAsm.exe

pid	process
1640	RegAsm.exe

pid	process
1156	invoice _25280.exe
1156	invoice _25280.exe

description	pid	process
Token: SeDebugPrivilege	1640	RegAsm.exe

pid	process
1640	RegAsm.exe

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

invoice _25280.exe

description	pid	process	target process
PID 1156 wrote to memory of 912	1156	invoice _25280.exe	RegAsm.exe
PID 1156 wrote to memory of 912	1156	invoice _25280.exe	RegAsm.exe
PID 1156 wrote to memory of 912	1156	invoice _25280.exe	RegAsm.exe
PID 1156 wrote to memory of 912	1156	invoice _25280.exe	RegAsm.exe
PID 1156 wrote to memory of 912	1156	invoice _25280.exe	RegAsm.exe
PID 1156 wrote to memory of 912	1156	invoice _25280.exe	RegAsm.exe
PID 1156 wrote to memory of 912	1156	invoice _25280.exe	RegAsm.exe
PID 1156 wrote to memory of 1640	1156	invoice _25280.exe	RegAsm.exe
PID 1156 wrote to memory of 1640	1156	invoice _25280.exe	RegAsm.exe
PID 1156 wrote to memory of 1640	1156	invoice _25280.exe	RegAsm.exe
PID 1156 wrote to memory of 1640	1156	invoice _25280.exe	RegAsm.exe
PID 1156 wrote to memory of 1640	1156	invoice _25280.exe	RegAsm.exe
PID 1156 wrote to memory of 1640	1156	invoice _25280.exe	RegAsm.exe
PID 1156 wrote to memory of 1640	1156	invoice _25280.exe	RegAsm.exe
PID 1156 wrote to memory of 1640	1156	invoice _25280.exe	RegAsm.exe

outlook_office_path 1 IoCs

Processes:

RegAsm.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-790309383-526510583-3802439154-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe

outlook_win_path 1 IoCs

Processes:

RegAsm.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-790309383-526510583-3802439154-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe

C:\Users\Admin\AppData\Local\Temp\invoice _25280.exe
"C:\Users\Admin\AppData\Local\Temp\invoice _25280.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:1156

C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
"C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
2⤵
PID:912

C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
"C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
2⤵
- Accesses Microsoft Outlook profiles
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- outlook_office_path
- outlook_win_path
PID:1640

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

2

T1081

Discovery

Lateral Movement

Collection

Data from Local System

Email Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/1156-54-0x0000000000190000-0x0000000000250000-memory.dmp

Filesize
768KB

Download
memory/1156-55-0x0000000004FC0000-0x000000000503A000-memory.dmp

Filesize
488KB

Download
memory/1156-56-0x0000000074DC1000-0x0000000074DC3000-memory.dmp

Filesize
8KB

Download
memory/1156-59-0x00000000003F0000-0x00000000003F3000-memory.dmp

Filesize
12KB

Download
memory/1640-57-0x000000000046CE6E-mapping.dmp

Download
memory/1640-60-0x0000000000400000-0x0000000000472000-memory.dmp

Filesize
456KB

Download
memory/1640-61-0x0000000005995000-0x00000000059A6000-memory.dmp

Filesize
68KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads