Analysis

  • max time kernel
    141s
  • max time network
    139s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • submitted
    12/09/2022, 03:00

General

  • Target
    file.exe
  • Size 4.9MB
  • Sample220912-dhb1macec3
  • SHA256 048775019adc05c1978f5be85341eb95fb8c9c15611ee13a1fbbffaef3f4f1dc
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • vidar

Version
  • 54.3

Botnet
  • 1656

C2
  • https://t.me/karacakahve

  • https://ieji.de/@tiagoa96

Attributes
  • profile_id

    1656

Signatures

  • Vidar

    Vidar is an infostealer based on Arkei stealer.

  • Checks computer location settings 2 TTPs 1 IoCs

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

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

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

  • Accesses 2FA software files, possible credential harvesting 2 TTPs
  • 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.

  • 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 2 IoCs

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

  • Delays execution with timeout.exe 1 IoCs
  • Kills process with taskkill 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 9 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.exe"
    1⤵
    • Checks computer location settings
    • Loads dropped DLL
    • Checks processor information in registry
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:3052
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im file.exe /f & timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\Temp\file.exe" & del C:\PrograData\*.dll & exit
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4664
      • C:\Windows\SysWOW64\taskkill.exe
        taskkill /im file.exe /f
        3⤵
        • Kills process with taskkill
        • Suspicious use of AdjustPrivilegeToken
        PID:4632
      • C:\Windows\SysWOW64\timeout.exe
        timeout /t 6
        3⤵
        • Delays execution with timeout.exe
        PID:3324

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        mozglue.dll

        • Path C:\ProgramData\mozglue.dll
        • Size 133KB
        • SHA256 3fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd
        • MD5 SHA1 SHA512 SSDEEP

        nss3.dll

        • Path C:\ProgramData\nss3.dll
        • Size 1.2MB
        • SHA256 e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78
        • MD5 SHA1 SHA512 SSDEEP

        memory/3052-132-0x0000000000A30000-0x0000000000F28000-memory.dmp

        memory/3052-133-0x0000000000A30000-0x0000000000F28000-memory.dmp

        memory/3052-134-0x0000000060900000-0x0000000060992000-memory.dmp

        memory/3052-158-0x0000000000A30000-0x0000000000F28000-memory.dmp