Analysis

  • max time kernel
    83s
  • max time network
    120s
  • platform
    windows10_x64
  • resource
    win10-en-20210920
  • submitted
    12/10/2021, 16:29

General

  • Target
    09ab0907323d5de77ebe2891813dc5d0.exe
  • Size 635KB
  • Sample211012-ty883acgd9
  • SHA256 152c854e0e028eaa43bef46d7375d5704cf43f2c22a0354d7757e7cf5cdc3a89
  • MD5 SHA1 SHA512

Malware Config

Extracted

Family
  • vidar

Version
  • 41.3

Botnet
  • 1008

C2
  • https://mas.to/@oleg98

Attributes
  • profile_id

    1008

Signatures

  • Vidar

    Vidar is an infostealer based on Arkei stealer.

  • Vidar Stealer 2 IoCs
  • Downloads MZ/PE file
  • 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 8 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 9 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\09ab0907323d5de77ebe2891813dc5d0.exe
    "C:\Users\Admin\AppData\Local\Temp\09ab0907323d5de77ebe2891813dc5d0.exe"
    1⤵
    • Loads dropped DLL
    • Checks processor information in registry
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:2384
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im 09ab0907323d5de77ebe2891813dc5d0.exe /f & timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\Temp\09ab0907323d5de77ebe2891813dc5d0.exe" & del C:\ProgramData\*.dll & exit
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1020
      • C:\Windows\SysWOW64\taskkill.exe
        taskkill /im 09ab0907323d5de77ebe2891813dc5d0.exe /f
        3⤵
        • Kills process with taskkill
        • Suspicious use of AdjustPrivilegeToken
        PID:3980
      • C:\Windows\SysWOW64\timeout.exe
        timeout /t 6
        3⤵
        • Delays execution with timeout.exe
        PID:3544

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        memory/2384-115-0x0000000000751000-0x00000000007CD000-memory.dmp

        memory/2384-117-0x0000000000400000-0x00000000004D9000-memory.dmp

        memory/2384-116-0x00000000005E0000-0x000000000072A000-memory.dmp