matiex | 31211fd1239d9e0de50a1af9ad1e71a55be0dac1e55e06444d2537caa96bd0c6

General

Target

b577138111c80cdcde338683038c04be.exe
Size

1.7MB
MD5

b577138111c80cdcde338683038c04be
SHA1

d4a9804675c85b1a7ac28858e6fb8cdd92018e23
SHA256

31211fd1239d9e0de50a1af9ad1e71a55be0dac1e55e06444d2537caa96bd0c6
SHA512

78de0e55882061f05dfb9ad20a023b05cf7e58f53873eceff90b271957bfc0b1b6f3a1e9820fb20bcf3621de726043c1e519af42349d2312f093432377586d83

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/672-60-0x0000000000400000-0x0000000000472000-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-1-5-21-2199625441-3471261906-229485034-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe
Key opened	\REGISTRY\USER\S-1-5-21-2199625441-3471261906-229485034-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe
Key opened	\REGISTRY\USER\S-1-5-21-2199625441-3471261906-229485034-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe

Looks up external IP address via web service 1 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.

Processes:

flow ioc

4 checkip.dyndns.org
Suspicious use of SetThreadContext 1 IoCs

Processes:

b577138111c80cdcde338683038c04be.exe

description pid process target process

PID 1248 set thread context of 672 1248 b577138111c80cdcde338683038c04be.exe RegAsm.exe
Suspicious behavior: MapViewOfSection 1 IoCs

Processes:

b577138111c80cdcde338683038c04be.exe

pid process

1248 b577138111c80cdcde338683038c04be.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

RegAsm.exe

description pid process

Token: SeDebugPrivilege 672 RegAsm.exe

flow	ioc
4	checkip.dyndns.org

description	pid	process	target process
PID 1248 set thread context of 672	1248	b577138111c80cdcde338683038c04be.exe	RegAsm.exe

pid	process
1248	b577138111c80cdcde338683038c04be.exe

description	pid	process
Token: SeDebugPrivilege	672	RegAsm.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

b577138111c80cdcde338683038c04be.exe

description	pid	process	target process
PID 1248 wrote to memory of 672	1248	b577138111c80cdcde338683038c04be.exe	RegAsm.exe
PID 1248 wrote to memory of 672	1248	b577138111c80cdcde338683038c04be.exe	RegAsm.exe
PID 1248 wrote to memory of 672	1248	b577138111c80cdcde338683038c04be.exe	RegAsm.exe
PID 1248 wrote to memory of 672	1248	b577138111c80cdcde338683038c04be.exe	RegAsm.exe
PID 1248 wrote to memory of 672	1248	b577138111c80cdcde338683038c04be.exe	RegAsm.exe
PID 1248 wrote to memory of 672	1248	b577138111c80cdcde338683038c04be.exe	RegAsm.exe
PID 1248 wrote to memory of 672	1248	b577138111c80cdcde338683038c04be.exe	RegAsm.exe
PID 1248 wrote to memory of 672	1248	b577138111c80cdcde338683038c04be.exe	RegAsm.exe

outlook_office_path 1 IoCs

Processes:

RegAsm.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-2199625441-3471261906-229485034-1000\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-1-5-21-2199625441-3471261906-229485034-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe

C:\Users\Admin\AppData\Local\Temp\b577138111c80cdcde338683038c04be.exe
"C:\Users\Admin\AppData\Local\Temp\b577138111c80cdcde338683038c04be.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:1248
- 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 use of AdjustPrivilegeToken
  - outlook_office_path
  - outlook_win_path
  PID:672

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/672-59-0x0000000076071000-0x0000000076073000-memory.dmp

Filesize
8KB

Download
memory/672-60-0x0000000000400000-0x0000000000472000-memory.dmp

Filesize
456KB

Download
memory/672-61-0x0000000074720000-0x0000000074E0E000-memory.dmp

Filesize
6.9MB

Download
memory/672-62-0x0000000005810000-0x0000000005811000-memory.dmp

Filesize
4KB

Download
memory/1248-54-0x0000000001110000-0x00000000011C6000-memory.dmp

Filesize
728KB

Download
memory/1248-55-0x0000000074820000-0x0000000074F0E000-memory.dmp

Filesize
6.9MB

Download
memory/1248-56-0x0000000004950000-0x0000000004951000-memory.dmp

Filesize
4KB

Download
memory/1248-57-0x0000000004D40000-0x0000000004DBA000-memory.dmp

Filesize
488KB

Download
memory/1248-58-0x0000000000980000-0x0000000000983000-memory.dmp

Filesize
12KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads