matiex | 356c38de132ad392f3155f48d11f97efbd7892a04499aea67dab5a76e85cb68d

General

Target

tmp/vbc.exe
Size

1.5MB
MD5

8e5e31f5dd73631eddc2cb57e0f48a9a
SHA1

13bd3cf85edef10be8b60c96334eda4f30eda0ba
SHA256

356c38de132ad392f3155f48d11f97efbd7892a04499aea67dab5a76e85cb68d
SHA512

43cf5099575d698ffbd13dc82aa76e2358629d52217cd9d019acfb52c87a29e1ef9750dee756d164787544c76cc68464b014e3f17b3236467952ef95215a94d1

Score

10^/10

matiex collection keylogger spyware stealer

Malware Config

Extracted

Family

matiex

C2

https://api.telegram.org/bot1769394961:AAF5BB35akL859CwVaXypIqpVsGWlaKvi7A/sendMessage?chat_id=1735544933

Signatures

Matiex
Matiex is a keylogger and infostealer first seen in July 2020.
stealer keylogger matiex

Matiex Main Payload 3 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3596-126-0x000000000047032E-mapping.dmp	family_matiex
behavioral2/memory/3596-125-0x0000000000400000-0x0000000000476000-memory.dmp	family_matiex
behavioral2/memory/3596-133-0x00000000053A0000-0x000000000589E000-memory.dmp	family_matiex

Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
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
Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

Processes:

vbc.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-369956170-74428499-1628131376-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	vbc.exe
Key opened	\REGISTRY\USER\S-1-5-21-369956170-74428499-1628131376-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	vbc.exe
Key opened	\REGISTRY\USER\S-1-5-21-369956170-74428499-1628131376-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	vbc.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

29 checkip.dyndns.org
31 freegeoip.app
32 freegeoip.app
Suspicious use of SetThreadContext 1 IoCs

Processes:

vbc.exe

description pid process target process

PID 1884 set thread context of 3596 1884 vbc.exe vbc.exe
Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

3784 3596 WerFault.exe vbc.exe

flow	ioc
29	checkip.dyndns.org
31	freegeoip.app
32	freegeoip.app

description	pid	process	target process
PID 1884 set thread context of 3596	1884	vbc.exe	vbc.exe

pid	pid_target	process	target process
3784	3596	WerFault.exe	vbc.exe

Suspicious behavior: EnumeratesProcesses 12 IoCs

Processes:

WerFault.exe

pid	process
3784	WerFault.exe
3784	WerFault.exe
3784	WerFault.exe
3784	WerFault.exe
3784	WerFault.exe
3784	WerFault.exe
3784	WerFault.exe
3784	WerFault.exe
3784	WerFault.exe
3784	WerFault.exe
3784	WerFault.exe
3784	WerFault.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes:

vbc.exeWerFault.exe

description	pid	process
Token: SeDebugPrivilege	3596	vbc.exe
Token: SeRestorePrivilege	3784	WerFault.exe
Token: SeBackupPrivilege	3784	WerFault.exe
Token: SeDebugPrivilege	3784	WerFault.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

vbc.exe

description	pid	process	target process
PID 1884 wrote to memory of 3596	1884	vbc.exe	vbc.exe
PID 1884 wrote to memory of 3596	1884	vbc.exe	vbc.exe
PID 1884 wrote to memory of 3596	1884	vbc.exe	vbc.exe
PID 1884 wrote to memory of 3596	1884	vbc.exe	vbc.exe
PID 1884 wrote to memory of 3596	1884	vbc.exe	vbc.exe
PID 1884 wrote to memory of 3596	1884	vbc.exe	vbc.exe
PID 1884 wrote to memory of 3596	1884	vbc.exe	vbc.exe
PID 1884 wrote to memory of 3596	1884	vbc.exe	vbc.exe

outlook_office_path 1 IoCs

Processes:

vbc.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-369956170-74428499-1628131376-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	vbc.exe

outlook_win_path 1 IoCs

Processes:

vbc.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-369956170-74428499-1628131376-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	vbc.exe

C:\Users\Admin\AppData\Local\Temp\tmp\vbc.exe
"C:\Users\Admin\AppData\Local\Temp\tmp\vbc.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1884

C:\Users\Admin\AppData\Local\Temp\tmp\vbc.exe
"C:\Users\Admin\AppData\Local\Temp\tmp\vbc.exe"
2⤵
- Accesses Microsoft Outlook profiles
- Suspicious use of AdjustPrivilegeToken
- outlook_office_path
- outlook_win_path
PID:3596

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 3596 -s 2020
3⤵
- Program crash
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:3784

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scripting

1

T1064

Persistence

Privilege Escalation

Defense Evasion

Scripting

1

T1064

Credential Access

Credentials in Files

2

T1081

Discovery

Lateral Movement

Collection

Data from Local System

Email Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\vbc.exe.log
MD5
f1181bc4bdff57024c4121f645548332

SHA1
d431ee3a3a5afcae2c4537b1d445054a0a95f6e6

SHA256
f1a7e138b25d0cb24bb4b23bd781b0dd357afd49d45e19ffa44cdb80170336ad

SHA512
cf8059f289bcb4f33e82a2c4851fade486bd449793a39718d49bc357efd09689150aedd277c5ebcf79b5ebb4bbe36f0cbb72510a50398bee804ffd9c889604e3

Download Submit
memory/1884-122-0x0000000004F70000-0x000000000546E000-memory.dmp

Filesize
5.0MB

Download
memory/1884-118-0x0000000004F70000-0x0000000004F71000-memory.dmp

Filesize
4KB

Download
memory/1884-119-0x0000000005070000-0x0000000005071000-memory.dmp

Filesize
4KB

Download
memory/1884-120-0x0000000008460000-0x0000000008467000-memory.dmp

Filesize
28KB

Download
memory/1884-121-0x0000000008470000-0x0000000008471000-memory.dmp

Filesize
4KB

Download
memory/1884-115-0x0000000000550000-0x0000000000551000-memory.dmp

Filesize
4KB

Download
memory/1884-123-0x00000000087E0000-0x00000000087E1000-memory.dmp

Filesize
4KB

Download
memory/1884-124-0x0000000008B50000-0x0000000008CC3000-memory.dmp

Filesize
1.4MB

Download
memory/1884-117-0x0000000005470000-0x0000000005471000-memory.dmp

Filesize
4KB

Download
memory/3596-126-0x000000000047032E-mapping.dmp

Download
memory/3596-125-0x0000000000400000-0x0000000000476000-memory.dmp

Filesize
472KB

Download
memory/3596-132-0x00000000053A0000-0x00000000053A1000-memory.dmp

Filesize
4KB

Download
memory/3596-133-0x00000000053A0000-0x000000000589E000-memory.dmp

Filesize
5.0MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads