matiex | 5497370a1c39741caebb42d33e653266fa0d71810a1cec19aac99931ac81a15e

General

Target

NKP210102-NIT-SC2.exe
Size

779KB
MD5

087dfca6f2b2c9825a49d4b986d7f539
SHA1

748e44b93cf2882248b2e27c728eb11018984bf4
SHA256

af8629a317a5fe7aa5900f445cd855b902a495c497646c3ef1485ea5a9d026a7
SHA512

25ab703c8261e1c36e4656b405b2aff6c8595bc26fe3b0f982e7249a90d6d6405d5f66ff8c28f8696d16c99a479718657dc669e0e4e5c2abe00e3ea03bac588d

Score

10^/10

matiex collection keylogger stealer

Malware Config

Extracted

Credentials

Protocol: smtp
Host:
mail.revistaeducar.com.ar
Port:
25
Username:
[email protected]
Password:
somchai#3774

Extracted

Family

matiex

Credentials

Protocol: smtp
Host:
mail.revistaeducar.com.ar
Port:
25
Username:
[email protected]
Password:
somchai#3774

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
behavioral2/memory/4000-141-0x0000000000400000-0x0000000000472000-memory.dmp	family_matiex

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

NKP210102-NIT-SC2.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000\Control Panel\International\Geo\Nation	NKP210102-NIT-SC2.exe

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

Processes:

RegSvcs.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegSvcs.exe
Key opened	\REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegSvcs.exe
Key opened	\REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegSvcs.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

48 checkip.dyndns.org
50 freegeoip.app
51 freegeoip.app
Suspicious use of SetThreadContext 1 IoCs

Processes:

NKP210102-NIT-SC2.exe

description pid process target process

PID 3008 set thread context of 4000 3008 NKP210102-NIT-SC2.exe RegSvcs.exe

flow	ioc
48	checkip.dyndns.org
50	freegeoip.app
51	freegeoip.app

description	pid	process	target process
PID 3008 set thread context of 4000	3008	NKP210102-NIT-SC2.exe	RegSvcs.exe

Drops file in Windows directory 6 IoCs

Processes:

svchost.exe

description	ioc	process
File opened for modification	C:\Windows\WindowsUpdate.log	svchost.exe
File opened for modification	C:\Windows\SoftwareDistribution\DataStore\Logs\edb.chk	svchost.exe
File opened for modification	C:\Windows\SoftwareDistribution\DataStore\Logs\edb.log	svchost.exe
File opened for modification	C:\Windows\SoftwareDistribution\DataStore\DataStore.edb	svchost.exe
File opened for modification	C:\Windows\SoftwareDistribution\DataStore\DataStore.jfm	svchost.exe
File opened for modification	C:\Windows\SoftwareDistribution\ReportingEvents.log	svchost.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task
T1053

Processes:

schtasks.exe

pid process

4012 schtasks.exe
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

RegSvcs.exe

pid process

4000 RegSvcs.exe
Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

RegSvcs.exe

pid process

4000 RegSvcs.exe

pid	process
4012	schtasks.exe

pid	process
4000	RegSvcs.exe

pid	process
4000	RegSvcs.exe

Suspicious use of AdjustPrivilegeToken 7 IoCs

Processes:

svchost.exeRegSvcs.exe

description	pid	process
Token: SeShutdownPrivilege	3420	svchost.exe
Token: SeCreatePagefilePrivilege	3420	svchost.exe
Token: SeShutdownPrivilege	3420	svchost.exe
Token: SeCreatePagefilePrivilege	3420	svchost.exe
Token: SeShutdownPrivilege	3420	svchost.exe
Token: SeCreatePagefilePrivilege	3420	svchost.exe
Token: SeDebugPrivilege	4000	RegSvcs.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

RegSvcs.exe

pid process

4000 RegSvcs.exe

pid	process
4000	RegSvcs.exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

NKP210102-NIT-SC2.exe

description	pid	process	target process
PID 3008 wrote to memory of 4012	3008	NKP210102-NIT-SC2.exe	schtasks.exe
PID 3008 wrote to memory of 4012	3008	NKP210102-NIT-SC2.exe	schtasks.exe
PID 3008 wrote to memory of 4012	3008	NKP210102-NIT-SC2.exe	schtasks.exe
PID 3008 wrote to memory of 4000	3008	NKP210102-NIT-SC2.exe	RegSvcs.exe
PID 3008 wrote to memory of 4000	3008	NKP210102-NIT-SC2.exe	RegSvcs.exe
PID 3008 wrote to memory of 4000	3008	NKP210102-NIT-SC2.exe	RegSvcs.exe
PID 3008 wrote to memory of 4000	3008	NKP210102-NIT-SC2.exe	RegSvcs.exe
PID 3008 wrote to memory of 4000	3008	NKP210102-NIT-SC2.exe	RegSvcs.exe
PID 3008 wrote to memory of 4000	3008	NKP210102-NIT-SC2.exe	RegSvcs.exe
PID 3008 wrote to memory of 4000	3008	NKP210102-NIT-SC2.exe	RegSvcs.exe
PID 3008 wrote to memory of 4000	3008	NKP210102-NIT-SC2.exe	RegSvcs.exe

outlook_office_path 1 IoCs

Processes:

RegSvcs.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegSvcs.exe

outlook_win_path 1 IoCs

Processes:

RegSvcs.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegSvcs.exe

C:\Users\Admin\AppData\Local\Temp\NKP210102-NIT-SC2.exe
"C:\Users\Admin\AppData\Local\Temp\NKP210102-NIT-SC2.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3008

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\kVTLnkXYUzFB" /XML "C:\Users\Admin\AppData\Local\Temp\tmpE9F.tmp"
2⤵
- Creates scheduled task(s)
PID:4012

C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
"{path}"
2⤵
- Accesses Microsoft Outlook profiles
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- outlook_office_path
- outlook_win_path
PID:4000

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k netsvcs -p -s wuauserv
1⤵
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
PID:3420

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Email Collection

1

T1114

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmpE9F.tmp
MD5
0375d27c7ee1c61af6135319bd83c87b

SHA1
3db451ac8d48fc986051b0bf3e636de930446601

SHA256
bf589a067fe1a2f3a3480ceaa1e8c41ee607515dd68074138ce8ffac040301a6

SHA512
f897c5e341b270dca7997ac7c5339fe5b81a9db13c1973dc228780da560bd6e898f37866052d2b7400cf1e3d066f9b5065c7912bddb9e626240220edc65f5673

Download Submit
memory/3008-130-0x0000000000660000-0x0000000000728000-memory.dmp

Filesize
800KB

Download
memory/3008-131-0x0000000005710000-0x0000000005CB4000-memory.dmp

Filesize
5.6MB

Download
memory/3008-132-0x00000000050B0000-0x0000000005142000-memory.dmp

Filesize
584KB

Download
memory/3008-133-0x0000000074F6E000-0x0000000074F6F000-memory.dmp

Filesize
4KB

Download
memory/3008-134-0x0000000005290000-0x000000000529A000-memory.dmp

Filesize
40KB

Download
memory/3008-135-0x00000000052D0000-0x00000000052D1000-memory.dmp

Filesize
4KB

Download
memory/3008-139-0x00000000061D0000-0x000000000626C000-memory.dmp

Filesize
624KB

Download
memory/3420-138-0x0000024E26990000-0x0000024E26994000-memory.dmp

Filesize
16KB

Download
memory/3420-137-0x0000024E24320000-0x0000024E24330000-memory.dmp

Filesize
64KB

Download
memory/3420-136-0x0000024E23D60000-0x0000024E23D70000-memory.dmp

Filesize
64KB

Download
memory/4000-141-0x0000000000400000-0x0000000000472000-memory.dmp

Filesize
456KB

Download
memory/4000-142-0x0000000005830000-0x0000000005896000-memory.dmp

Filesize
408KB

Download
memory/4000-144-0x0000000005930000-0x0000000005931000-memory.dmp

Filesize
4KB

Download
memory/4000-143-0x0000000074F6E000-0x0000000074F6F000-memory.dmp

Filesize
4KB

Download
memory/4000-145-0x00000000074B0000-0x0000000007672000-memory.dmp

Filesize
1.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads