matiex | 4a879a46f6c35cd6b690a689a2cdc0dffb2acb9fac39ce2b7a5116607bc87753

General

Target

97671a2ff8c7f29b3ad0ab1e3d91f6c8.exe
Size

624KB
MD5

97671a2ff8c7f29b3ad0ab1e3d91f6c8
SHA1

379f979aabf0e5ab11eba5a7d216e56ed2d31a95
SHA256

4a879a46f6c35cd6b690a689a2cdc0dffb2acb9fac39ce2b7a5116607bc87753
SHA512

6260247564a51b5734ce503fee1e832cb14b6013e497e0d65e92211d0eb3c7de644375d319c4c7e88b2e7bac358d5e793ed79bc10ea14e357457f155918270a7
SSDEEP

12288:MSx9jlYDJjaLfZASHlz2bz1q5LEKtc6qn2yLxCTtJ5gKFqJq:P72bz1q5ttu2AET6KFqJq

Score

10^/10

matiex collection keylogger spyware stealer

Malware Config

Extracted

Family

matiex

C2

https://api.telegram.org/bot1277090811:AAHJ1mutkv0Wr1_9949BBcb3lR-DuRKH5RU/sendMessage?chat_id=1216524090

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/1044-149-0x0000000000400000-0x0000000000472000-memory.dmp	family_matiex

Drops startup file 2 IoCs

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

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

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	97671a2ff8c7f29b3ad0ab1e3d91f6c8.exe
Key opened	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	97671a2ff8c7f29b3ad0ab1e3d91f6c8.exe
Key opened	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	97671a2ff8c7f29b3ad0ab1e3d91f6c8.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.

flow	ioc
38	checkip.dyndns.org
41	freegeoip.app
42	freegeoip.app

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 5020 set thread context of 1044	5020	97671a2ff8c7f29b3ad0ab1e3d91f6c8.exe	92

Program crash 1 IoCs

pid	pid_target	Process	procid_target
4648	1044	WerFault.exe	92

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4420	Powershell.exe
4420	Powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4420	Powershell.exe
Token: SeDebugPrivilege	1044	97671a2ff8c7f29b3ad0ab1e3d91f6c8.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 5020 wrote to memory of 4420	5020	97671a2ff8c7f29b3ad0ab1e3d91f6c8.exe	87
PID 5020 wrote to memory of 4420	5020	97671a2ff8c7f29b3ad0ab1e3d91f6c8.exe	87
PID 5020 wrote to memory of 4420	5020	97671a2ff8c7f29b3ad0ab1e3d91f6c8.exe	87
PID 5020 wrote to memory of 1044	5020	97671a2ff8c7f29b3ad0ab1e3d91f6c8.exe	92
PID 5020 wrote to memory of 1044	5020	97671a2ff8c7f29b3ad0ab1e3d91f6c8.exe	92
PID 5020 wrote to memory of 1044	5020	97671a2ff8c7f29b3ad0ab1e3d91f6c8.exe	92
PID 5020 wrote to memory of 1044	5020	97671a2ff8c7f29b3ad0ab1e3d91f6c8.exe	92
PID 5020 wrote to memory of 1044	5020	97671a2ff8c7f29b3ad0ab1e3d91f6c8.exe	92
PID 5020 wrote to memory of 1044	5020	97671a2ff8c7f29b3ad0ab1e3d91f6c8.exe	92
PID 5020 wrote to memory of 1044	5020	97671a2ff8c7f29b3ad0ab1e3d91f6c8.exe	92
PID 5020 wrote to memory of 1044	5020	97671a2ff8c7f29b3ad0ab1e3d91f6c8.exe	92

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	97671a2ff8c7f29b3ad0ab1e3d91f6c8.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	97671a2ff8c7f29b3ad0ab1e3d91f6c8.exe

C:\Users\Admin\AppData\Local\Temp\97671a2ff8c7f29b3ad0ab1e3d91f6c8.exe
"C:\Users\Admin\AppData\Local\Temp\97671a2ff8c7f29b3ad0ab1e3d91f6c8.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:5020
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\Powershell.exe
  "Powershell.exe" -ExecutionPolicy Bypass -command Copy-Item 'C:\Users\Admin\AppData\Local\Temp\97671a2ff8c7f29b3ad0ab1e3d91f6c8.exe' 'C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nuey.exe'
  2⤵
  - Drops startup file
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4420
- C:\Users\Admin\AppData\Local\Temp\97671a2ff8c7f29b3ad0ab1e3d91f6c8.exe
  "C:\Users\Admin\AppData\Local\Temp\97671a2ff8c7f29b3ad0ab1e3d91f6c8.exe"
  2⤵
  - Accesses Microsoft Outlook profiles
  - Suspicious use of AdjustPrivilegeToken
  - outlook_office_path
  - outlook_win_path
  PID:1044
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1044 -s 2020
    3⤵
    - Program crash
    PID:4648

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 188 -p 1044 -ip 1044
1⤵
PID:2500

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

Replay Monitor

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Downloads

memory/1044-150-0x0000000006D20000-0x0000000006EE2000-memory.dmp

Filesize
1.8MB

Download
memory/1044-149-0x0000000000400000-0x0000000000472000-memory.dmp

Filesize
456KB

Download
memory/4420-144-0x0000000005A50000-0x0000000005A6E000-memory.dmp

Filesize
120KB

Download
memory/4420-142-0x0000000005310000-0x0000000005376000-memory.dmp

Filesize
408KB

Download
memory/4420-147-0x0000000005FB0000-0x0000000005FD2000-memory.dmp

Filesize
136KB

Download
memory/4420-139-0x0000000004490000-0x00000000044C6000-memory.dmp

Filesize
216KB

Download
memory/4420-140-0x0000000004BF0000-0x0000000005218000-memory.dmp

Filesize
6.2MB

Download
memory/4420-141-0x0000000004BA0000-0x0000000004BC2000-memory.dmp

Filesize
136KB

Download
memory/4420-146-0x0000000005F20000-0x0000000005F3A000-memory.dmp

Filesize
104KB

Download
memory/4420-143-0x0000000005430000-0x0000000005496000-memory.dmp

Filesize
408KB

Download
memory/4420-145-0x0000000006C30000-0x0000000006CC6000-memory.dmp

Filesize
600KB

Download
memory/5020-132-0x0000000000630000-0x00000000006D2000-memory.dmp

Filesize
648KB

Download
memory/5020-136-0x0000000005130000-0x000000000513A000-memory.dmp

Filesize
40KB

Download
memory/5020-137-0x0000000005390000-0x00000000053E6000-memory.dmp

Filesize
344KB

Download
memory/5020-135-0x00000000051D0000-0x0000000005262000-memory.dmp

Filesize
584KB

Download
memory/5020-134-0x00000000056E0000-0x0000000005C84000-memory.dmp

Filesize
5.6MB

Download
memory/5020-133-0x0000000005090000-0x000000000512C000-memory.dmp

Filesize
624KB

Download

Analysis

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