matiex | e3c1114b2db69d8480751fbaac9a517a3d7d4e5cd4d2175771968f9bdd778c42

General

Target
0908000090000.exe
Size 3.4MB
Sample220502-1c217aebap
SHA256 315e6e844a325bdbdbd68365d389adb3e31c55cf7323936f14f3e48f7e5f3014
MD5 2b16401ac7e40343abde78deb36f0746
SHA1 6c441249071a590f6a1178cc276f87f8641c8cf4
SHA512 3ec8ac63db7b07b9a43b37f27cc80da7543baab0c259e25de2e92cc058427b385d4dc6aa91fc12cdd3b1d6d40c20df1a5c7731ec750a91770f98631c1840a9b8
MD5 SHA1 SHA512

Score

10^/10

matiex collection keylogger persistence spyware stealer

Malware Config

Extracted

Family

matiex

Credentials

Protocol
smtp
Host
srvc13.turhost.com
Port
587
Username
[email protected]
Password
italik2015

Signatures

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

Matiex Main Payload 1 IoCs

resource	yara_rule
behavioral2/memory/2204-134-0x0000000000400000-0x0000000000476000-memory.dmp	family_matiex

Modifies WinLogon for persistence 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1081944012-3634099177-1681222835-1000\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\shell = "explorer.exe,\"C:\\Users\\Admin\\AppData\\Local\\Temp\\0908000090000.exe\""	0908000090000.exe

Drops startup file 2 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\0908000090000.exe	0908000090000.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\0908000090000.exe	0908000090000.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 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

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1081944012-3634099177-1681222835-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	0908000090000.exe
Key opened	\REGISTRY\USER\S-1-5-21-1081944012-3634099177-1681222835-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	0908000090000.exe
Key opened	\REGISTRY\USER\S-1-5-21-1081944012-3634099177-1681222835-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	0908000090000.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1081944012-3634099177-1681222835-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\<Unknown> = "C:\\Users\\Admin\\AppData\\Local\\Temp\\0908000090000.exe"	0908000090000.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1081944012-3634099177-1681222835-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\0908000090000.exe = "C:\\Users\\Admin\\AppData\\Local\\Temp\\0908000090000.exe"	0908000090000.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.

flow	ioc
56	checkip.dyndns.org

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 472 set thread context of 2204	472	0908000090000.exe	91

Program crash 1 IoCs

pid	pid_target	Process	procid_target
3568	2204	WerFault.exe	91

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2204	0908000090000.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 472 wrote to memory of 2204	472	0908000090000.exe	91
PID 472 wrote to memory of 2204	472	0908000090000.exe	91
PID 472 wrote to memory of 2204	472	0908000090000.exe	91
PID 472 wrote to memory of 2204	472	0908000090000.exe	91
PID 472 wrote to memory of 2204	472	0908000090000.exe	91
PID 472 wrote to memory of 2204	472	0908000090000.exe	91
PID 472 wrote to memory of 2204	472	0908000090000.exe	91
PID 472 wrote to memory of 2204	472	0908000090000.exe	91

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1081944012-3634099177-1681222835-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	0908000090000.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1081944012-3634099177-1681222835-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	0908000090000.exe

C:\Users\Admin\AppData\Local\Temp\0908000090000.exe
"C:\Users\Admin\AppData\Local\Temp\0908000090000.exe"
1⤵
- Modifies WinLogon for persistence
- Drops startup file
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:472
- C:\Users\Admin\AppData\Local\Temp\0908000090000.exe
  "C:\Users\Admin\AppData\Local\Temp\0908000090000.exe"
  2⤵
  - Accesses Microsoft Outlook profiles
  - Suspicious use of AdjustPrivilegeToken
  - outlook_office_path
  - outlook_win_path
  PID:2204
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 2204 -s 1724
    3⤵
    - Program crash
    PID:3568