matiex | 623e7e4cc3035fc745bf34c07c5fffc4258fac2e4cd2c9f7d4ba2045e24371a0

General

Target

TNT E-Invoice Cosignment Delivery Notification_pdf.exe
Size

1.1MB
MD5

22e5a3e8fb401981cfdb4bc0c9235e7d
SHA1

5a371efcb5183f96f96082b5fefec1e05b84c21f
SHA256

b0dd472a02ed67fe15e20e2faa6167d8c1e9d54c9f0abc95a255197bbf0c0264
SHA512

d787f86a0ef8da1f29ea3accc3871fd3e78d9f09dccafe58cf13dbbc2a5a19cdfd22001e0417301b9401f6bea79d68c40119aba5a29db9e931ea98e2d294dba3

Score

10^/10

matiex collection keylogger persistence 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/852-56-0x0000000001160000-0x00000000011D4000-memory.dmp	family_matiex
behavioral1/memory/1716-60-0x0000000000400000-0x0000000000470000-memory.dmp	family_matiex
behavioral1/memory/1716-61-0x0000000000400000-0x0000000000470000-memory.dmp	family_matiex
behavioral1/memory/1716-63-0x000000000046B6CE-mapping.dmp	family_matiex
behavioral1/memory/1716-62-0x0000000000400000-0x0000000000470000-memory.dmp	family_matiex
behavioral1/memory/1716-65-0x0000000000400000-0x0000000000470000-memory.dmp	family_matiex
behavioral1/memory/1716-67-0x0000000000400000-0x0000000000470000-memory.dmp	family_matiex

Modifies WinLogon for persistence 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1004

Modify Registry

T1112

Processes:

TNT E-Invoice Cosignment Delivery Notification_pdf.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\shell = "explorer.exe,\"C:\\Users\\Admin\\AppData\\Local\\Temp\\TNT E-Invoice Cosignment Delivery Notification_pdf.exe\""	TNT E-Invoice Cosignment Delivery Notification_pdf.exe

Drops startup file 2 IoCs

Processes:

TNT E-Invoice Cosignment Delivery Notification_pdf.exe

description	ioc	process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\TNT E-Invoice Cosignment Delivery Notification_pdf.exe	TNT E-Invoice Cosignment Delivery Notification_pdf.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\TNT E-Invoice Cosignment Delivery Notification_pdf.exe	TNT E-Invoice Cosignment Delivery Notification_pdf.exe

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

Processes:

caspol.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	caspol.exe
Key opened	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	caspol.exe
Key opened	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	caspol.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

TNT E-Invoice Cosignment Delivery Notification_pdf.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Windows\CurrentVersion\Run\TNT E-Invoice Cosignment Delivery Notification_pdf.exe = "C:\\Users\\Admin\\AppData\\Local\\Temp\\TNT E-Invoice Cosignment Delivery Notification_pdf.exe"	TNT E-Invoice Cosignment Delivery Notification_pdf.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:

TNT E-Invoice Cosignment Delivery Notification_pdf.exe

description pid process target process

PID 852 set thread context of 1716 852 TNT E-Invoice Cosignment Delivery Notification_pdf.exe caspol.exe
Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

868 1716 WerFault.exe caspol.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

caspol.exe

description pid process

Token: SeDebugPrivilege 1716 caspol.exe

flow	ioc
4	checkip.dyndns.org

description	pid	process	target process
PID 852 set thread context of 1716	852	TNT E-Invoice Cosignment Delivery Notification_pdf.exe	caspol.exe

pid	pid_target	process	target process
868	1716	WerFault.exe	caspol.exe

description	pid	process
Token: SeDebugPrivilege	1716	caspol.exe

Suspicious use of WriteProcessMemory 13 IoCs

Processes:

TNT E-Invoice Cosignment Delivery Notification_pdf.execaspol.exe

description	pid	process	target process
PID 852 wrote to memory of 1716	852	TNT E-Invoice Cosignment Delivery Notification_pdf.exe	caspol.exe
PID 852 wrote to memory of 1716	852	TNT E-Invoice Cosignment Delivery Notification_pdf.exe	caspol.exe
PID 852 wrote to memory of 1716	852	TNT E-Invoice Cosignment Delivery Notification_pdf.exe	caspol.exe
PID 852 wrote to memory of 1716	852	TNT E-Invoice Cosignment Delivery Notification_pdf.exe	caspol.exe
PID 852 wrote to memory of 1716	852	TNT E-Invoice Cosignment Delivery Notification_pdf.exe	caspol.exe
PID 852 wrote to memory of 1716	852	TNT E-Invoice Cosignment Delivery Notification_pdf.exe	caspol.exe
PID 852 wrote to memory of 1716	852	TNT E-Invoice Cosignment Delivery Notification_pdf.exe	caspol.exe
PID 852 wrote to memory of 1716	852	TNT E-Invoice Cosignment Delivery Notification_pdf.exe	caspol.exe
PID 852 wrote to memory of 1716	852	TNT E-Invoice Cosignment Delivery Notification_pdf.exe	caspol.exe
PID 1716 wrote to memory of 868	1716	caspol.exe	WerFault.exe
PID 1716 wrote to memory of 868	1716	caspol.exe	WerFault.exe
PID 1716 wrote to memory of 868	1716	caspol.exe	WerFault.exe
PID 1716 wrote to memory of 868	1716	caspol.exe	WerFault.exe

outlook_office_path 1 IoCs

Processes:

caspol.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	caspol.exe

outlook_win_path 1 IoCs

Processes:

caspol.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	caspol.exe

C:\Users\Admin\AppData\Local\Temp\TNT E-Invoice Cosignment Delivery Notification_pdf.exe
"C:\Users\Admin\AppData\Local\Temp\TNT E-Invoice Cosignment Delivery Notification_pdf.exe"
1⤵
- Modifies WinLogon for persistence
- Drops startup file
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:852

C:\Windows\Microsoft.NET\Framework\v4.0.30319\caspol.exe
"C:\Windows\Microsoft.NET\Framework\v4.0.30319\caspol.exe"
2⤵
- Accesses Microsoft Outlook profiles
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
- outlook_office_path
- outlook_win_path
PID:1716

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 1716 -s 1324
3⤵
- Program crash
PID:868

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

Discovery

Lateral Movement

Collection

Email Collection

1

T1114

Exfiltration

Command and Control

Impact

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Downloads

memory/852-54-0x00000000013B0000-0x00000000014C8000-memory.dmp

Filesize
1.1MB

Download
memory/852-55-0x00000000763E1000-0x00000000763E3000-memory.dmp

Filesize
8KB

Download
memory/852-56-0x0000000001160000-0x00000000011D4000-memory.dmp

Filesize
464KB

Download
memory/868-69-0x0000000000000000-mapping.dmp

Download
memory/1716-57-0x0000000000400000-0x0000000000470000-memory.dmp

Filesize
448KB

Download
memory/1716-58-0x0000000000400000-0x0000000000470000-memory.dmp

Filesize
448KB

Download
memory/1716-60-0x0000000000400000-0x0000000000470000-memory.dmp

Filesize
448KB

Download
memory/1716-61-0x0000000000400000-0x0000000000470000-memory.dmp

Filesize
448KB

Download
memory/1716-63-0x000000000046B6CE-mapping.dmp

Download
memory/1716-62-0x0000000000400000-0x0000000000470000-memory.dmp

Filesize
448KB

Download
memory/1716-65-0x0000000000400000-0x0000000000470000-memory.dmp

Filesize
448KB

Download
memory/1716-67-0x0000000000400000-0x0000000000470000-memory.dmp

Filesize
448KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads