matiex | 0cd342a69ae909916dcb8592e08e92ae6026bd0831179f46c95a8af1bc26e666

General

Target

b5a3eb26f3d7532eba91ea8122d8045e.exe
Size

1.2MB
MD5

b5a3eb26f3d7532eba91ea8122d8045e
SHA1

f12b2ff14004c73ea99e30dafab805e8dcb17df0
SHA256

0cd342a69ae909916dcb8592e08e92ae6026bd0831179f46c95a8af1bc26e666
SHA512

ba0dbe9a04725ced3f2beef7c27396a80a835c32ed9d4795be3de8a13cf3c4dc4d6b3a30d5668fda5269d9f744f17346bb04c3a10546ac34eab56721cf164965
SSDEEP

24576:2aLZZjhZStXqCFhg+Iu1WVq5J+hu3A8K/dwiGY1iQzB7oaRv/7d5OGQT4wFPuvUf:2mjhZShJgBbnJ

Score

10^/10

matiex collection keylogger spyware stealer

Malware Config

Extracted

Family

matiex

Credentials

Protocol: smtp
Host:
mail.thts.vn
Port:
25
Username:
[email protected]
Password:
123luongngan1989
Email To:
[email protected]

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/3316-13-0x0000000000400000-0x0000000000472000-memory.dmp	family_matiex

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
T1552.001
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
T1552.001

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2398549320-3657759451-817663969-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	b5a3eb26f3d7532eba91ea8122d8045e.exe
Key opened	\REGISTRY\USER\S-1-5-21-2398549320-3657759451-817663969-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	b5a3eb26f3d7532eba91ea8122d8045e.exe
Key opened	\REGISTRY\USER\S-1-5-21-2398549320-3657759451-817663969-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	b5a3eb26f3d7532eba91ea8122d8045e.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
87	checkip.dyndns.org
90	freegeoip.app
91	freegeoip.app

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 5040 set thread context of 3316	5040	b5a3eb26f3d7532eba91ea8122d8045e.exe	99

Program crash 1 IoCs

pid	pid_target	Process	procid_target
4924	3316	WerFault.exe	99

Modifies registry class 5 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2398549320-3657759451-817663969-1000_Classes\ms-settings\shell\open\command	b5a3eb26f3d7532eba91ea8122d8045e.exe
Key created	\REGISTRY\USER\S-1-5-21-2398549320-3657759451-817663969-1000_Classes\ms-settings	b5a3eb26f3d7532eba91ea8122d8045e.exe
Key created	\REGISTRY\USER\S-1-5-21-2398549320-3657759451-817663969-1000_Classes\ms-settings\shell	b5a3eb26f3d7532eba91ea8122d8045e.exe
Key created	\REGISTRY\USER\S-1-5-21-2398549320-3657759451-817663969-1000_Classes\ms-settings\shell\open	b5a3eb26f3d7532eba91ea8122d8045e.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2398549320-3657759451-817663969-1000_Classes\ms-settings\shell\open\command\	b5a3eb26f3d7532eba91ea8122d8045e.exe

Suspicious behavior: RenamesItself 1 IoCs

pid	Process
3316	b5a3eb26f3d7532eba91ea8122d8045e.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	5040	b5a3eb26f3d7532eba91ea8122d8045e.exe
Token: SeDebugPrivilege	3316	b5a3eb26f3d7532eba91ea8122d8045e.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 5040 wrote to memory of 3316	5040	b5a3eb26f3d7532eba91ea8122d8045e.exe	99
PID 5040 wrote to memory of 3316	5040	b5a3eb26f3d7532eba91ea8122d8045e.exe	99
PID 5040 wrote to memory of 3316	5040	b5a3eb26f3d7532eba91ea8122d8045e.exe	99
PID 5040 wrote to memory of 3316	5040	b5a3eb26f3d7532eba91ea8122d8045e.exe	99
PID 5040 wrote to memory of 3316	5040	b5a3eb26f3d7532eba91ea8122d8045e.exe	99
PID 5040 wrote to memory of 3316	5040	b5a3eb26f3d7532eba91ea8122d8045e.exe	99
PID 5040 wrote to memory of 3316	5040	b5a3eb26f3d7532eba91ea8122d8045e.exe	99
PID 5040 wrote to memory of 3316	5040	b5a3eb26f3d7532eba91ea8122d8045e.exe	99

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2398549320-3657759451-817663969-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	b5a3eb26f3d7532eba91ea8122d8045e.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2398549320-3657759451-817663969-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	b5a3eb26f3d7532eba91ea8122d8045e.exe

C:\Users\Admin\AppData\Local\Temp\b5a3eb26f3d7532eba91ea8122d8045e.exe
"C:\Users\Admin\AppData\Local\Temp\b5a3eb26f3d7532eba91ea8122d8045e.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5040
- C:\Users\Admin\AppData\Local\Temp\b5a3eb26f3d7532eba91ea8122d8045e.exe
  "C:\Users\Admin\AppData\Local\Temp\b5a3eb26f3d7532eba91ea8122d8045e.exe"
  2⤵
  - Accesses Microsoft Outlook profiles
  - Modifies registry class
  - Suspicious behavior: RenamesItself
  - Suspicious use of AdjustPrivilegeToken
  - outlook_office_path
  - outlook_win_path
  PID:3316
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 3316 -s 2088
    3⤵
    - Program crash
    PID:4924

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 428 -p 3316 -ip 3316
1⤵
PID:1588

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Unsecured Credentials

2

T1552

Credentials In Files

2

T1552.001

Discovery

Lateral Movement

Collection

Data from Local System

Email Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\b5a3eb26f3d7532eba91ea8122d8045e.exe.log

Filesize
1KB

MD5
17573558c4e714f606f997e5157afaac

SHA1
13e16e9415ceef429aaf124139671ebeca09ed23

SHA256
c18db6aecad2436da4a63ff26af4e3a337cca48f01c21b8db494fe5ccc60e553

SHA512
f4edf13f05a0d142e4dd42802098c8c44988ee8869621a62c2b565a77c9a95857f636583ff8d6d9baa366603d98b9bfbf1fc75bc6f9f8f83c80cb1215b2941cc

Download Submit
memory/3316-13-0x0000000000400000-0x0000000000472000-memory.dmp

Filesize
456KB

Download
memory/3316-21-0x0000000075020000-0x00000000757D0000-memory.dmp

Filesize
7.7MB

Download
memory/3316-20-0x0000000007340000-0x0000000007502000-memory.dmp

Filesize
1.8MB

Download
memory/3316-19-0x0000000005BD0000-0x0000000005BE0000-memory.dmp

Filesize
64KB

Download
memory/3316-18-0x0000000005A90000-0x0000000005AF6000-memory.dmp

Filesize
408KB

Download
memory/3316-16-0x0000000075020000-0x00000000757D0000-memory.dmp

Filesize
7.7MB

Download
memory/5040-5-0x0000000005BA0000-0x0000000005BB0000-memory.dmp

Filesize
64KB

Download
memory/5040-7-0x0000000005B40000-0x0000000005B96000-memory.dmp

Filesize
344KB

Download
memory/5040-9-0x0000000005BA0000-0x0000000005BB0000-memory.dmp

Filesize
64KB

Download
memory/5040-10-0x0000000005980000-0x00000000059B6000-memory.dmp

Filesize
216KB

Download
memory/5040-11-0x00000000018F0000-0x0000000001984000-memory.dmp

Filesize
592KB

Download
memory/5040-12-0x0000000005BB0000-0x0000000005C28000-memory.dmp

Filesize
480KB

Download
memory/5040-6-0x0000000005920000-0x000000000592A000-memory.dmp

Filesize
40KB

Download
memory/5040-8-0x0000000075020000-0x00000000757D0000-memory.dmp

Filesize
7.7MB

Download
memory/5040-0-0x0000000075020000-0x00000000757D0000-memory.dmp

Filesize
7.7MB

Download
memory/5040-17-0x0000000075020000-0x00000000757D0000-memory.dmp

Filesize
7.7MB

Download
memory/5040-4-0x00000000059B0000-0x0000000005A42000-memory.dmp

Filesize
584KB

Download
memory/5040-3-0x0000000005EC0000-0x0000000006464000-memory.dmp

Filesize
5.6MB

Download
memory/5040-2-0x0000000005870000-0x000000000590C000-memory.dmp

Filesize
624KB

Download
memory/5040-1-0x0000000000D40000-0x0000000000E72000-memory.dmp

Filesize
1.2MB

Download

Analysis

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