Analysis
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max time kernel
110s -
max time network
124s -
platform
windows10_x64 -
resource
win10-en-20211208 -
submitted
15-12-2021 22:29
Static task
static1
Behavioral task
behavioral1
Sample
tmp/f4a9803d-192a-4465-81eb-9dee6b5e5132_vbc.exe
Resource
win7-en-20211208
Behavioral task
behavioral2
Sample
tmp/f4a9803d-192a-4465-81eb-9dee6b5e5132_vbc.exe
Resource
win10-en-20211208
General
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Target
tmp/f4a9803d-192a-4465-81eb-9dee6b5e5132_vbc.exe
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Size
1.5MB
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MD5
8e5e31f5dd73631eddc2cb57e0f48a9a
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SHA1
13bd3cf85edef10be8b60c96334eda4f30eda0ba
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SHA256
356c38de132ad392f3155f48d11f97efbd7892a04499aea67dab5a76e85cb68d
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SHA512
43cf5099575d698ffbd13dc82aa76e2358629d52217cd9d019acfb52c87a29e1ef9750dee756d164787544c76cc68464b014e3f17b3236467952ef95215a94d1
Malware Config
Extracted
matiex
https://api.telegram.org/bot1769394961:AAF5BB35akL859CwVaXypIqpVsGWlaKvi7A/sendMessage?chat_id=1735544933
Signatures
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Matiex Main Payload 3 IoCs
Processes:
resource yara_rule behavioral2/memory/3480-125-0x0000000000400000-0x0000000000476000-memory.dmp family_matiex behavioral2/memory/3480-126-0x000000000047032E-mapping.dmp family_matiex behavioral2/memory/3480-133-0x0000000005200000-0x00000000056FE000-memory.dmp family_matiex -
Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
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Reads user/profile data of local email clients 2 TTPs
Email clients store some user data on disk where infostealers will often target it.
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Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
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Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
Processes:
f4a9803d-192a-4465-81eb-9dee6b5e5132_vbc.exedescription ioc process Key opened \REGISTRY\USER\S-1-5-21-2361464256-2201551969-2316606395-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 f4a9803d-192a-4465-81eb-9dee6b5e5132_vbc.exe Key opened \REGISTRY\USER\S-1-5-21-2361464256-2201551969-2316606395-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 f4a9803d-192a-4465-81eb-9dee6b5e5132_vbc.exe Key opened \REGISTRY\USER\S-1-5-21-2361464256-2201551969-2316606395-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 f4a9803d-192a-4465-81eb-9dee6b5e5132_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 27 checkip.dyndns.org 29 freegeoip.app 30 freegeoip.app -
Suspicious use of SetThreadContext 1 IoCs
Processes:
f4a9803d-192a-4465-81eb-9dee6b5e5132_vbc.exedescription pid process target process PID 2732 set thread context of 3480 2732 f4a9803d-192a-4465-81eb-9dee6b5e5132_vbc.exe f4a9803d-192a-4465-81eb-9dee6b5e5132_vbc.exe -
Suspicious behavior: EnumeratesProcesses 1 IoCs
Processes:
f4a9803d-192a-4465-81eb-9dee6b5e5132_vbc.exepid process 3480 f4a9803d-192a-4465-81eb-9dee6b5e5132_vbc.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
Processes:
f4a9803d-192a-4465-81eb-9dee6b5e5132_vbc.exedescription pid process Token: SeDebugPrivilege 3480 f4a9803d-192a-4465-81eb-9dee6b5e5132_vbc.exe -
Suspicious use of WriteProcessMemory 11 IoCs
Processes:
f4a9803d-192a-4465-81eb-9dee6b5e5132_vbc.exef4a9803d-192a-4465-81eb-9dee6b5e5132_vbc.exedescription pid process target process PID 2732 wrote to memory of 3480 2732 f4a9803d-192a-4465-81eb-9dee6b5e5132_vbc.exe f4a9803d-192a-4465-81eb-9dee6b5e5132_vbc.exe PID 2732 wrote to memory of 3480 2732 f4a9803d-192a-4465-81eb-9dee6b5e5132_vbc.exe f4a9803d-192a-4465-81eb-9dee6b5e5132_vbc.exe PID 2732 wrote to memory of 3480 2732 f4a9803d-192a-4465-81eb-9dee6b5e5132_vbc.exe f4a9803d-192a-4465-81eb-9dee6b5e5132_vbc.exe PID 2732 wrote to memory of 3480 2732 f4a9803d-192a-4465-81eb-9dee6b5e5132_vbc.exe f4a9803d-192a-4465-81eb-9dee6b5e5132_vbc.exe PID 2732 wrote to memory of 3480 2732 f4a9803d-192a-4465-81eb-9dee6b5e5132_vbc.exe f4a9803d-192a-4465-81eb-9dee6b5e5132_vbc.exe PID 2732 wrote to memory of 3480 2732 f4a9803d-192a-4465-81eb-9dee6b5e5132_vbc.exe f4a9803d-192a-4465-81eb-9dee6b5e5132_vbc.exe PID 2732 wrote to memory of 3480 2732 f4a9803d-192a-4465-81eb-9dee6b5e5132_vbc.exe f4a9803d-192a-4465-81eb-9dee6b5e5132_vbc.exe PID 2732 wrote to memory of 3480 2732 f4a9803d-192a-4465-81eb-9dee6b5e5132_vbc.exe f4a9803d-192a-4465-81eb-9dee6b5e5132_vbc.exe PID 3480 wrote to memory of 720 3480 f4a9803d-192a-4465-81eb-9dee6b5e5132_vbc.exe netsh.exe PID 3480 wrote to memory of 720 3480 f4a9803d-192a-4465-81eb-9dee6b5e5132_vbc.exe netsh.exe PID 3480 wrote to memory of 720 3480 f4a9803d-192a-4465-81eb-9dee6b5e5132_vbc.exe netsh.exe -
outlook_office_path 1 IoCs
Processes:
f4a9803d-192a-4465-81eb-9dee6b5e5132_vbc.exedescription ioc process Key opened \REGISTRY\USER\S-1-5-21-2361464256-2201551969-2316606395-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 f4a9803d-192a-4465-81eb-9dee6b5e5132_vbc.exe -
outlook_win_path 1 IoCs
Processes:
f4a9803d-192a-4465-81eb-9dee6b5e5132_vbc.exedescription ioc process Key opened \REGISTRY\USER\S-1-5-21-2361464256-2201551969-2316606395-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 f4a9803d-192a-4465-81eb-9dee6b5e5132_vbc.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\tmp\f4a9803d-192a-4465-81eb-9dee6b5e5132_vbc.exe"C:\Users\Admin\AppData\Local\Temp\tmp\f4a9803d-192a-4465-81eb-9dee6b5e5132_vbc.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\tmp\f4a9803d-192a-4465-81eb-9dee6b5e5132_vbc.exe"C:\Users\Admin\AppData\Local\Temp\tmp\f4a9803d-192a-4465-81eb-9dee6b5e5132_vbc.exe"2⤵
- Accesses Microsoft Outlook profiles
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
- outlook_office_path
- outlook_win_path
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C:\Windows\SysWOW64\netsh.exe"netsh" wlan show profile3⤵
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
Loading Replay Monitor...
Downloads
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C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\f4a9803d-192a-4465-81eb-9dee6b5e5132_vbc.exe.logMD5
f1181bc4bdff57024c4121f645548332
SHA1d431ee3a3a5afcae2c4537b1d445054a0a95f6e6
SHA256f1a7e138b25d0cb24bb4b23bd781b0dd357afd49d45e19ffa44cdb80170336ad
SHA512cf8059f289bcb4f33e82a2c4851fade486bd449793a39718d49bc357efd09689150aedd277c5ebcf79b5ebb4bbe36f0cbb72510a50398bee804ffd9c889604e3
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memory/720-134-0x0000000000000000-mapping.dmp
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memory/2732-124-0x00000000086E0000-0x0000000008853000-memory.dmpFilesize
1.4MB
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memory/2732-118-0x0000000004AA0000-0x0000000004AA1000-memory.dmpFilesize
4KB
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memory/2732-120-0x0000000004BB0000-0x00000000050AE000-memory.dmpFilesize
5.0MB
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memory/2732-121-0x0000000004D40000-0x0000000004D47000-memory.dmpFilesize
28KB
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memory/2732-122-0x0000000008000000-0x0000000008001000-memory.dmpFilesize
4KB
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memory/2732-123-0x0000000008370000-0x0000000008371000-memory.dmpFilesize
4KB
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memory/2732-115-0x00000000000E0000-0x00000000000E1000-memory.dmpFilesize
4KB
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memory/2732-119-0x0000000004A90000-0x0000000004A91000-memory.dmpFilesize
4KB
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memory/2732-117-0x00000000050B0000-0x00000000050B1000-memory.dmpFilesize
4KB
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memory/3480-125-0x0000000000400000-0x0000000000476000-memory.dmpFilesize
472KB
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memory/3480-132-0x0000000005270000-0x0000000005271000-memory.dmpFilesize
4KB
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memory/3480-133-0x0000000005200000-0x00000000056FE000-memory.dmpFilesize
5.0MB
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memory/3480-126-0x000000000047032E-mapping.dmp
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memory/3480-135-0x0000000006950000-0x0000000006951000-memory.dmpFilesize
4KB