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Analysis

  • max time kernel
    161s
  • max time network
    192s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-en-20220112
  • submitted
    04/02/2022, 14:01

General

  • Target

    3a950b6406e9f4098accf439b350ac1f56276e97a23c63394b0a558c96ec0ea8.exe

  • Size

    93KB

  • MD5

    8ca753bfe600c706450ed63844d97136

  • SHA1

    63cb396f48c852efcb9d8e6925cf1eff5c33debf

  • SHA256

    3a950b6406e9f4098accf439b350ac1f56276e97a23c63394b0a558c96ec0ea8

  • SHA512

    c52608b4c9f8f3fa2c3153413beb6e2ffd66778e173555fb94be70231dad760d018e776e321565f54eede1cb6e530305455dfdcdfe862250f529d56fd393acdb

Malware Config

Signatures

  • suricata: ET MALWARE Win32/Vidar Variant Stealer CnC Exfil

    suricata: ET MALWARE Win32/Vidar Variant Stealer CnC Exfil

  • Downloads MZ/PE file
  • Sets service image path in registry 2 TTPs
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Loads dropped DLL 3 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Drops file in Windows directory 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Checks processor information in registry 2 TTPs 3 IoCs

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

  • Delays execution with timeout.exe 1 IoCs
  • Modifies data under HKEY_USERS 64 IoCs
  • Suspicious use of WriteProcessMemory 6 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\3a950b6406e9f4098accf439b350ac1f56276e97a23c63394b0a558c96ec0ea8.exe
    "C:\Users\Admin\AppData\Local\Temp\3a950b6406e9f4098accf439b350ac1f56276e97a23c63394b0a558c96ec0ea8.exe"
    1⤵
    • Checks computer location settings
    • Loads dropped DLL
    • Checks processor information in registry
    • Suspicious use of WriteProcessMemory
    PID:2908
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\3a950b6406e9f4098accf439b350ac1f56276e97a23c63394b0a558c96ec0ea8.exe" & exit
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1776
      • C:\Windows\SysWOW64\timeout.exe
        timeout /t 5
        3⤵
        • Delays execution with timeout.exe
        PID:2816
  • C:\Windows\system32\MusNotifyIcon.exe
    %systemroot%\system32\MusNotifyIcon.exe NotifyTrayIcon 13
    1⤵
    • Checks processor information in registry
    PID:3904
  • C:\Windows\System32\WaaSMedicAgent.exe
    C:\Windows\System32\WaaSMedicAgent.exe 2384f860ed065bbc7e1bbb1716a9c24e l5ndw/BHLkCkeWNZ78nsyw.0.1.0.0.0
    1⤵
    • Modifies data under HKEY_USERS
    PID:3836
  • 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:2960

Network

MITRE ATT&CK Enterprise v6

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