Analysis

  • max time kernel
    148s
  • max time network
    156s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-en-20220112
  • submitted
    21-02-2022 23:01

General

  • Target

    PO# 2366.exe

  • Size

    562KB

  • MD5

    87ea6faf43f55191b84e9be3da3bb730

  • SHA1

    5d61fdb034fe227740428dd8f025c6ef06c6d7d8

  • SHA256

    2026239c3cabfeae27fabc93031453a0af2bb4e18275bb0ee9d9ed467d3ae303

  • SHA512

    10160f0e589681e6eac32e60cbca665fc01e728d305659154e2e121b0ede7dc3c9dc7bf101fafbc158e9806a46573944dd3ced2eb07b0eafa9e53790c9bf9c14

Malware Config

Extracted

Family

matiex

C2

https://api.telegram.org/bot1277090811:AAHJ1mutkv0Wr1_9949BBcb3lR-DuRKH5RU/sendMessage?chat_id=1216524090

Signatures

  • Matiex

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

  • Matiex Main Payload 1 IoCs
  • Drops startup file 2 IoCs
  • Reads user/profile data of local email clients 2 TTPs

    Email clients store some user data on disk where infostealers will often target it.

  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
  • Looks up external IP address via web service 3 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Suspicious use of SetThreadContext 1 IoCs
  • Drops file in Windows directory 3 IoCs
  • Checks processor information in registry 2 TTPs 2 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Modifies data under HKEY_USERS 53 IoCs
  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 11 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\PO# 2366.exe
    "C:\Users\Admin\AppData\Local\Temp\PO# 2366.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2168
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\Powershell.exe
      "Powershell.exe" -ExecutionPolicy Bypass -command Copy-Item 'C:\Users\Admin\AppData\Local\Temp\PO# 2366.exe' 'C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nuey.exe'
      2⤵
      • Drops startup file
      • Suspicious behavior: EnumeratesProcesses
      PID:3120
    • C:\Users\Admin\AppData\Local\Temp\PO# 2366.exe
      "C:\Users\Admin\AppData\Local\Temp\PO# 2366.exe"
      2⤵
      • Accesses Microsoft Outlook profiles
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of SetWindowsHookEx
      • outlook_office_path
      • outlook_win_path
      PID:2884
  • C:\Windows\system32\MusNotifyIcon.exe
    %systemroot%\system32\MusNotifyIcon.exe NotifyTrayIcon 13
    1⤵
    • Checks processor information in registry
    PID:3068
  • C:\Windows\System32\svchost.exe
    C:\Windows\System32\svchost.exe -k NetworkService -p
    1⤵
    • Drops file in Windows directory
    • Modifies data under HKEY_USERS
    PID:2860
  • C:\Windows\winsxs\amd64_microsoft-windows-servicingstack_31bf3856ad364e35_10.0.19041.1220_none_7e21bc567c7ed16b\TiWorker.exe
    C:\Windows\winsxs\amd64_microsoft-windows-servicingstack_31bf3856ad364e35_10.0.19041.1220_none_7e21bc567c7ed16b\TiWorker.exe -Embedding
    1⤵
    • Drops file in Windows directory
    • Suspicious use of AdjustPrivilegeToken
    PID:940

Network

MITRE ATT&CK Matrix ATT&CK v6

Credential Access

Credentials in Files

2
T1081

Discovery

Query Registry

1
T1012

System Information Discovery

1
T1082

Collection

Data from Local System

2
T1005

Email Collection

1
T1114

Replay Monitor

Loading Replay Monitor...

Downloads

  • memory/2168-136-0x0000000004D20000-0x0000000004D2A000-memory.dmp
    Filesize

    40KB

  • memory/2168-131-0x0000000000250000-0x00000000002E2000-memory.dmp
    Filesize

    584KB

  • memory/2168-132-0x0000000004C60000-0x0000000004CFC000-memory.dmp
    Filesize

    624KB

  • memory/2168-133-0x0000000005320000-0x00000000058C4000-memory.dmp
    Filesize

    5.6MB

  • memory/2168-134-0x0000000004E10000-0x0000000004EA2000-memory.dmp
    Filesize

    584KB

  • memory/2168-135-0x0000000004DE0000-0x0000000004DE1000-memory.dmp
    Filesize

    4KB

  • memory/2168-137-0x0000000004FF0000-0x0000000005046000-memory.dmp
    Filesize

    344KB

  • memory/2168-130-0x0000000074B9E000-0x0000000074B9F000-memory.dmp
    Filesize

    4KB

  • memory/2884-153-0x0000000000400000-0x0000000000472000-memory.dmp
    Filesize

    456KB

  • memory/2884-157-0x00000000054E3000-0x00000000054E5000-memory.dmp
    Filesize

    8KB

  • memory/2884-156-0x0000000007230000-0x00000000073F2000-memory.dmp
    Filesize

    1.8MB

  • memory/2884-154-0x0000000074B9E000-0x0000000074B9F000-memory.dmp
    Filesize

    4KB

  • memory/2884-155-0x00000000054E0000-0x00000000054E1000-memory.dmp
    Filesize

    4KB

  • memory/3120-142-0x0000000074B9E000-0x0000000074B9F000-memory.dmp
    Filesize

    4KB

  • memory/3120-146-0x0000000006F10000-0x0000000006F76000-memory.dmp
    Filesize

    408KB

  • memory/3120-147-0x0000000006F80000-0x0000000006FE6000-memory.dmp
    Filesize

    408KB

  • memory/3120-148-0x0000000007D40000-0x0000000007D5E000-memory.dmp
    Filesize

    120KB

  • memory/3120-149-0x0000000008E00000-0x0000000008E96000-memory.dmp
    Filesize

    600KB

  • memory/3120-150-0x0000000008340000-0x000000000835A000-memory.dmp
    Filesize

    104KB

  • memory/3120-151-0x0000000008390000-0x00000000083B2000-memory.dmp
    Filesize

    136KB

  • memory/3120-145-0x0000000006E70000-0x0000000006E92000-memory.dmp
    Filesize

    136KB

  • memory/3120-144-0x0000000006B22000-0x0000000006B23000-memory.dmp
    Filesize

    4KB

  • memory/3120-143-0x0000000006B20000-0x0000000006B21000-memory.dmp
    Filesize

    4KB

  • memory/3120-141-0x0000000007160000-0x0000000007788000-memory.dmp
    Filesize

    6.2MB

  • memory/3120-140-0x0000000004530000-0x0000000004566000-memory.dmp
    Filesize

    216KB