matiex | 786a583ea35093cc588069ed3b8d4dd6dbe8e9edfe68569d3752c6da82db0de1

Analysis

max time kernel
62s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20231222-en
resource tags

arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
submitted
01-01-2024 10:21

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General

Target

c6b4a2eb53f687988c0427cf752d429f.exe
Size

455KB
MD5

c6b4a2eb53f687988c0427cf752d429f
SHA1

d6b3299043950047524087631f72375b68bfc36d
SHA256

786a583ea35093cc588069ed3b8d4dd6dbe8e9edfe68569d3752c6da82db0de1
SHA512

ded0daa7672ade2aabf1695c67441c0c488b8f44170ebd438105936eeac2a4d9fb7da1aef48565bb42caf6807eb4f0157a0de43ddf4731e5d3c428e8cf034dee
SSDEEP

12288:TdmwkAYHSHrxntq1FM3LIU1pJJpjNc91662/TeIXL:TfzksOCL

Score

10^/10

matiex collection keylogger stealer

Malware Config

Extracted

Family

matiex

https://api.telegram.org/bot1718729558:AAFUftnJNVxfQZ7XrIUEpE1UiXHAYPc6VAQ/sendMessage?chat_id=1841930277

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/4564-1-0x0000000000540000-0x00000000005B6000-memory.dmp	family_matiex

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

Processes:

MSBuild.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-1168293393-3419776239-306423207-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe
Key opened	\REGISTRY\USER\S-1-5-21-1168293393-3419776239-306423207-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe
Key opened	\REGISTRY\USER\S-1-5-21-1168293393-3419776239-306423207-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.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
16 freegeoip.app
17 freegeoip.app
Suspicious use of SetThreadContext 1 IoCs

Processes:

c6b4a2eb53f687988c0427cf752d429f.exe

description pid process target process

PID 4948 set thread context of 4564 4948 c6b4a2eb53f687988c0427cf752d429f.exe MSBuild.exe
Program crash 2 IoCs

Processes:

WerFault.exeWerFault.exe

pid pid_target process target process

3620 4948 WerFault.exe c6b4a2eb53f687988c0427cf752d429f.exe
1400 4564 WerFault.exe MSBuild.exe
Suspicious behavior: MapViewOfSection 2 IoCs

Processes:

c6b4a2eb53f687988c0427cf752d429f.exe

pid process

4948 c6b4a2eb53f687988c0427cf752d429f.exe
4948 c6b4a2eb53f687988c0427cf752d429f.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

MSBuild.exe

description pid process

Token: SeDebugPrivilege 4564 MSBuild.exe

flow	ioc
3	checkip.dyndns.org
16	freegeoip.app
17	freegeoip.app

description	pid	process	target process
PID 4948 set thread context of 4564	4948	c6b4a2eb53f687988c0427cf752d429f.exe	MSBuild.exe

pid	pid_target	process	target process
3620	4948	WerFault.exe	c6b4a2eb53f687988c0427cf752d429f.exe
1400	4564	WerFault.exe	MSBuild.exe

pid	process
4948	c6b4a2eb53f687988c0427cf752d429f.exe
4948	c6b4a2eb53f687988c0427cf752d429f.exe

description	pid	process
Token: SeDebugPrivilege	4564	MSBuild.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

c6b4a2eb53f687988c0427cf752d429f.exe

description	pid	process	target process
PID 4948 wrote to memory of 4564	4948	c6b4a2eb53f687988c0427cf752d429f.exe	MSBuild.exe
PID 4948 wrote to memory of 4564	4948	c6b4a2eb53f687988c0427cf752d429f.exe	MSBuild.exe
PID 4948 wrote to memory of 4564	4948	c6b4a2eb53f687988c0427cf752d429f.exe	MSBuild.exe
PID 4948 wrote to memory of 4564	4948	c6b4a2eb53f687988c0427cf752d429f.exe	MSBuild.exe

outlook_office_path 1 IoCs

Processes:

MSBuild.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-1168293393-3419776239-306423207-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe

outlook_win_path 1 IoCs

Processes:

MSBuild.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-1168293393-3419776239-306423207-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe

C:\Users\Admin\AppData\Local\Temp\c6b4a2eb53f687988c0427cf752d429f.exe
"C:\Users\Admin\AppData\Local\Temp\c6b4a2eb53f687988c0427cf752d429f.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:4948
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
  "C:\Users\Admin\AppData\Local\Temp\c6b4a2eb53f687988c0427cf752d429f.exe"
  2⤵
  - Accesses Microsoft Outlook profiles
  - Suspicious use of AdjustPrivilegeToken
  - outlook_office_path
  - outlook_win_path
  PID:4564
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4564 -s 1936
    3⤵
    - Program crash
    PID:1400
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4948 -s 488
  2⤵
  - Program crash
  PID:3620

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4948 -ip 4948
1⤵
PID:1040

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 504 -p 4564 -ip 4564
1⤵
PID:3696

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Lateral Movement

Collection

Email Collection

T1114

Command and Control

Exfiltration

Impact

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Downloads

memory/4564-1-0x0000000000540000-0x00000000005B6000-memory.dmp

Filesize
472KB

Download
memory/4564-3-0x0000000004AD0000-0x0000000004B6C000-memory.dmp

Filesize
624KB

Download
memory/4564-2-0x00000000751A0000-0x0000000075950000-memory.dmp

Filesize
7.7MB

Download
memory/4564-4-0x0000000005120000-0x00000000056C4000-memory.dmp

Filesize
5.6MB

Download
memory/4564-5-0x0000000004C50000-0x0000000004CB6000-memory.dmp

Filesize
408KB

Download
memory/4564-6-0x0000000004C40000-0x0000000004C50000-memory.dmp

Filesize
64KB

Download
memory/4564-7-0x00000000751A0000-0x0000000075950000-memory.dmp

Filesize
7.7MB

Download
memory/4948-0-0x00000000006D0000-0x00000000006D2000-memory.dmp

Filesize
8KB

Download