Analysis

  • max time kernel
    119s
  • max time network
    168s
  • platform
    windows10_x64
  • resource
    win10-en-20211208
  • submitted
    28-01-2022 20:47

General

  • Target

    40987654323456789098746789098765432345678.exe

  • Size

    464KB

  • MD5

    b9a4dbf6bb05c4fe97ba541dcf555e70

  • SHA1

    0de7dc340d03d0144aef6692762c482e731f1717

  • SHA256

    69bae63d802887e2d994022011465c7f0bc42b1f0adefcee8dcbbfe243118b15

  • SHA512

    d9682bf0d38feb0dacc75826928734bf7165e39e44d450392d50f6a6aedf5bf1adf13f9a8556007243299f0c6cae5646df8c6a2de6db5c1ebb759ec79c6b6cee

Malware Config

Signatures

  • Matiex

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

  • Matiex Main Payload 3 IoCs
  • Loads dropped DLL 1 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 1 IoCs

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

  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Program crash 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 12 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of WriteProcessMemory 10 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\40987654323456789098746789098765432345678.exe
    "C:\Users\Admin\AppData\Local\Temp\40987654323456789098746789098765432345678.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2828
    • C:\Users\Admin\AppData\Local\Temp\40987654323456789098746789098765432345678.exe
      "C:\Users\Admin\AppData\Local\Temp\40987654323456789098746789098765432345678.exe"
      2⤵
      • Accesses Microsoft Outlook profiles
      • Suspicious use of AdjustPrivilegeToken
      • outlook_office_path
      • outlook_win_path
      PID:1208
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 1208 -s 1600
        3⤵
        • Program crash
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:1628

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads

  • \Users\Admin\AppData\Local\Temp\nsq5CA.tmp\acznqbhdm.dll

    MD5

    b520b52bb5db616d8768ad5cdb83e86d

    SHA1

    b7e44b9c5d77059d33a84378c7cdc4c47140d56e

    SHA256

    6c0bc5ebbe6cda42b607e181d902c4b4ac74a72a4915971e72b4b4335fbd92a2

    SHA512

    767efc549e3b48b850e6a82fb005a793d3d0f556b94e4d2b79ef7eda5ad4144245758c89f809914d264a99ad75137d14a0f43d3cb2a665d095dc83f026c9576c

  • memory/1208-122-0x0000000004AE0000-0x0000000004B7C000-memory.dmp

    Filesize

    624KB

  • memory/1208-118-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/1208-119-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/1208-120-0x0000000004A60000-0x0000000004A61000-memory.dmp

    Filesize

    4KB

  • memory/1208-121-0x0000000004950000-0x00000000049C2000-memory.dmp

    Filesize

    456KB

  • memory/1208-123-0x0000000004B80000-0x000000000507E000-memory.dmp

    Filesize

    5.0MB

  • memory/1208-125-0x0000000004A63000-0x0000000004A64000-memory.dmp

    Filesize

    4KB

  • memory/1208-124-0x0000000004A62000-0x0000000004A63000-memory.dmp

    Filesize

    4KB

  • memory/1208-126-0x00000000050C0000-0x0000000005126000-memory.dmp

    Filesize

    408KB

  • memory/1208-127-0x0000000004A40000-0x0000000004A65000-memory.dmp

    Filesize

    148KB

  • memory/1208-128-0x0000000005C90000-0x0000000005E52000-memory.dmp

    Filesize

    1.8MB

  • memory/2828-117-0x00000000023A0000-0x00000000023C3000-memory.dmp

    Filesize

    140KB