matiex | 0f888907403ebaee309e7927c72e5ebd6aca817209fd1a5a8ceaa0b028116fcd

General

Target

PO.exe
Size

1.6MB
MD5

e34037661a1608c722e5264797b2eecf
SHA1

2c02034a6d91d9e2b21504a4bec82ec36d7bdd5d
SHA256

fc1ca8b0fe8eab2d98c0f0e7ad37108f836fff77b50e393cf5dee61b7e4e6eb0
SHA512

4fec9aa1afe6a414a18998dd2bb867599330baef5fce02f553823f372b7d81a4006287daefc96a8fa197fe579989ec49d1c73c5034d1c48317e3f4d70e5d44df

Score

10^/10

matiex collection keylogger persistence spyware stealer

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/1800-56-0x0000000000E70000-0x0000000000F0C000-memory.dmp	family_matiex
behavioral1/memory/1756-63-0x0000000000400000-0x0000000000470000-memory.dmp	family_matiex
behavioral1/memory/1756-64-0x0000000000400000-0x0000000000470000-memory.dmp	family_matiex
behavioral1/memory/1756-65-0x0000000000400000-0x0000000000470000-memory.dmp	family_matiex
behavioral1/memory/1756-66-0x000000000046BA5E-mapping.dmp	family_matiex
behavioral1/memory/1756-68-0x0000000000400000-0x0000000000470000-memory.dmp	family_matiex
behavioral1/memory/1756-70-0x0000000000400000-0x0000000000470000-memory.dmp	family_matiex

Modifies WinLogon for persistence 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1004

Modify Registry

T1112

Processes:

PO.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\shell = "explorer.exe,\"C:\\Users\\Admin\\AppData\\Local\\Temp\\PO.exe\""	PO.exe

Drops startup file 2 IoCs

Processes:

PO.exe

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

Processes:

PO.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	PO.exe
Key opened	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	PO.exe
Key opened	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	PO.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

PO.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Windows\CurrentVersion\Run\PO.exe = "C:\\Users\\Admin\\AppData\\Local\\Temp\\PO.exe"	PO.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:

PO.exe

description pid process target process

PID 1800 set thread context of 1756 1800 PO.exe PO.exe
Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

1888 1756 WerFault.exe PO.exe
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

powershell.exe

pid process

996 powershell.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

powershell.exePO.exe

description pid process

Token: SeDebugPrivilege 996 powershell.exe
Token: SeDebugPrivilege 1756 PO.exe

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

description	pid	process	target process
PID 1800 set thread context of 1756	1800	PO.exe	PO.exe

pid	pid_target	process	target process
1888	1756	WerFault.exe	PO.exe

pid	process
996	powershell.exe

description	pid	process
Token: SeDebugPrivilege	996	powershell.exe
Token: SeDebugPrivilege	1756	PO.exe

Suspicious use of WriteProcessMemory 17 IoCs

Processes:

PO.exePO.exe

description	pid	process	target process
PID 1800 wrote to memory of 996	1800	PO.exe	powershell.exe
PID 1800 wrote to memory of 996	1800	PO.exe	powershell.exe
PID 1800 wrote to memory of 996	1800	PO.exe	powershell.exe
PID 1800 wrote to memory of 996	1800	PO.exe	powershell.exe
PID 1800 wrote to memory of 1756	1800	PO.exe	PO.exe
PID 1800 wrote to memory of 1756	1800	PO.exe	PO.exe
PID 1800 wrote to memory of 1756	1800	PO.exe	PO.exe
PID 1800 wrote to memory of 1756	1800	PO.exe	PO.exe
PID 1800 wrote to memory of 1756	1800	PO.exe	PO.exe
PID 1800 wrote to memory of 1756	1800	PO.exe	PO.exe
PID 1800 wrote to memory of 1756	1800	PO.exe	PO.exe
PID 1800 wrote to memory of 1756	1800	PO.exe	PO.exe
PID 1800 wrote to memory of 1756	1800	PO.exe	PO.exe
PID 1756 wrote to memory of 1888	1756	PO.exe	WerFault.exe
PID 1756 wrote to memory of 1888	1756	PO.exe	WerFault.exe
PID 1756 wrote to memory of 1888	1756	PO.exe	WerFault.exe
PID 1756 wrote to memory of 1888	1756	PO.exe	WerFault.exe

outlook_office_path 1 IoCs

Processes:

PO.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	PO.exe

outlook_win_path 1 IoCs

Processes:

PO.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	PO.exe

C:\Users\Admin\AppData\Local\Temp\PO.exe
"C:\Users\Admin\AppData\Local\Temp\PO.exe"
1⤵
- Modifies WinLogon for persistence
- Drops startup file
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1800

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
"powershell" Get-MpPreference -verbose
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:996

C:\Users\Admin\AppData\Local\Temp\PO.exe
"C:\Users\Admin\AppData\Local\Temp\PO.exe"
2⤵
- Accesses Microsoft Outlook profiles
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
- outlook_office_path
- outlook_win_path
PID:1756

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 1756 -s 1760
3⤵
- Program crash
PID:1888

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Winlogon Helper DLL

1

T1004

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

2

T1112

Credential Access

Credentials in Files

2

T1081

Discovery

Lateral Movement

Collection

Data from Local System

2

T1005

Email Collection

1

T1114

Exfiltration

Command and Control

Impact

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Downloads

memory/996-57-0x0000000000000000-mapping.dmp

Download
memory/996-59-0x000000006EEC0000-0x000000006F46B000-memory.dmp

Filesize
5.7MB

Download
memory/1756-61-0x0000000000400000-0x0000000000470000-memory.dmp

Filesize
448KB

Download
memory/1756-60-0x0000000000400000-0x0000000000470000-memory.dmp

Filesize
448KB

Download
memory/1756-63-0x0000000000400000-0x0000000000470000-memory.dmp

Filesize
448KB

Download
memory/1756-64-0x0000000000400000-0x0000000000470000-memory.dmp

Filesize
448KB

Download
memory/1756-65-0x0000000000400000-0x0000000000470000-memory.dmp

Filesize
448KB

Download
memory/1756-66-0x000000000046BA5E-mapping.dmp

Download
memory/1756-68-0x0000000000400000-0x0000000000470000-memory.dmp

Filesize
448KB

Download
memory/1756-70-0x0000000000400000-0x0000000000470000-memory.dmp

Filesize
448KB

Download
memory/1800-56-0x0000000000E70000-0x0000000000F0C000-memory.dmp

Filesize
624KB

Download
memory/1800-55-0x0000000075C71000-0x0000000075C73000-memory.dmp

Filesize
8KB

Download
memory/1800-54-0x0000000001330000-0x00000000014CE000-memory.dmp

Filesize
1.6MB

Download
memory/1888-72-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads