Overview

overview

10

Static

static

197f5a4cb7...c7.exe

windows7_x64

10

197f5a4cb7...c7.exe

windows10_x64

10

Analysis

  • max time kernel
    133s
  • max time network
    165s
  • platform
    windows7_x64
  • resource
    win7v20210410
  • submitted
    14/07/2021, 15:15

Sharing

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Report Analysis Logs

General

  • Target
    197f5a4cb71e38ea7b56bd1214fbbfc7.exe
  • Size 729KB
  • Sample210714-vbja2c8phj
  • SHA256 f8b60e554ed303e2debe7422bb363dcc33ace171d02388bce2e8ab5ce5364f5d
  • MD5 SHA1 SHA512
Score
10/10
vidar517discoverypersistenceransomwarespywarestealer

Malware Config

Extracted

Path

  • C:\_readme.txt

Ransom Note
  • ATTENTION! Don't worry, you can return all your files! All your files like pictures, databases, documents and other important are encrypted with strongest encryption and unique key. The only method of recovering files is to purchase decrypt tool and unique key for you. This software will decrypt all your encrypted files. What guarantees you have? You can send one of your encrypted file from your PC and we decrypt it for free. But we can decrypt only 1 file for free. File must not contain valuable information. You can get and look video overview decrypt tool: https://we.tl/t-tkon5qUcfl Price of private key and decrypt software is $980. Discount 50% available if you contact us first 72 hours, that's price for you is $490. Please note that you'll never restore your data without payment. Check your e-mail "Spam" or "Junk" folder if you don't get answer more than 6 hours. To get this software you need write on our e-mail: [email protected] Reserve e-mail address to contact us: [email protected] Your personal ID: 0316ewgfDdOcMcAt2OQZqFzJadYhow9MqoFd992adkvAnhUo2b
URLs

  • https://we.tl/t-tkon5qUcfl

Extracted

Family

  • vidar

Version

  • 39.5

Botnet

  • 517

C2

  • https://olegf9844.tumblr.com/

Attributes
  • profile_id

    517

Signatures

  • Vidar

    Vidar is an infostealer based on Arkei stealer.

    stealervidar
  • Vidar Stealer 4 IoCs
    stealer
  • Downloads MZ/PE file
  • Executes dropped EXE 4 IoCs
  • Modifies extensions of user files 4 IoCs

    Ransomware generally changes the extension on encrypted files.

    ransomware
  • Loads dropped DLL 6 IoCs
  • Modifies file permissions 1 TTPs 1 IoCs
    discovery
  • Reads user/profile data of web browsers 2 TTPs

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

    spywarestealer
  • Accesses 2FA software files, possible credential harvesting 2 TTPs
    spywarestealer
  • Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
    spyware
  • Adds Run key to start application 2 TTPs 1 IoCs
    persistence
  • Checks installed software on the system 1 TTPs

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

    discovery
  • Looks up external IP address via web service 4 IoCs

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

  • Suspicious use of SetThreadContext 4 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 2 IoCs

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

  • Delays execution with timeout.exe 1 IoCs
    evasion
  • Kills process with taskkill 1 IoCs
    evasion
  • Modifies system certificate store 2 TTPs 5 IoCs
    evasionspywaretrojan
  • Suspicious behavior: EnumeratesProcesses 11 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\197f5a4cb71e38ea7b56bd1214fbbfc7.exe
    "C:\Users\Admin\AppData\Local\Temp\197f5a4cb71e38ea7b56bd1214fbbfc7.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1260
    • C:\Users\Admin\AppData\Local\Temp\197f5a4cb71e38ea7b56bd1214fbbfc7.exe
      "C:\Users\Admin\AppData\Local\Temp\197f5a4cb71e38ea7b56bd1214fbbfc7.exe"
      2⤵
      • Adds Run key to start application
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:1776
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\5074bab0-c45c-4fe0-8126-f5dcd5bd52e5" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:2008
      • C:\Users\Admin\AppData\Local\Temp\197f5a4cb71e38ea7b56bd1214fbbfc7.exe
        "C:\Users\Admin\AppData\Local\Temp\197f5a4cb71e38ea7b56bd1214fbbfc7.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1084
        • C:\Users\Admin\AppData\Local\Temp\197f5a4cb71e38ea7b56bd1214fbbfc7.exe
          "C:\Users\Admin\AppData\Local\Temp\197f5a4cb71e38ea7b56bd1214fbbfc7.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Modifies extensions of user files
          • Loads dropped DLL
          • Modifies system certificate store
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:1784
          • C:\Users\Admin\AppData\Local\d99778aa-d177-4de1-a9e8-44d952ba4b6a\build2.exe
            "C:\Users\Admin\AppData\Local\d99778aa-d177-4de1-a9e8-44d952ba4b6a\build2.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious use of WriteProcessMemory
            PID:2032
            • C:\Users\Admin\AppData\Local\d99778aa-d177-4de1-a9e8-44d952ba4b6a\build2.exe
              "C:\Users\Admin\AppData\Local\d99778aa-d177-4de1-a9e8-44d952ba4b6a\build2.exe"
              6⤵
              • Executes dropped EXE
              • Loads dropped DLL
              • Checks processor information in registry
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of WriteProcessMemory
              PID:288
              • C:\Windows\SysWOW64\cmd.exe
                "C:\Windows\System32\cmd.exe" /c taskkill /im build2.exe /f & timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\d99778aa-d177-4de1-a9e8-44d952ba4b6a\build2.exe" & del C:\ProgramData\*.dll & exit
                7⤵
                • Suspicious use of WriteProcessMemory
                PID:572
                • C:\Windows\SysWOW64\taskkill.exe
                  taskkill /im build2.exe /f
                  8⤵
                  • Kills process with taskkill
                  • Suspicious use of AdjustPrivilegeToken
                  PID:992
                • C:\Windows\SysWOW64\timeout.exe
                  timeout /t 6
                  8⤵
                  • Delays execution with timeout.exe
                  PID:1172
  • C:\Windows\system32\taskeng.exe
    taskeng.exe {FF924D5B-D547-4E3E-A51E-EA9D8C40AC92} S-1-5-21-2513283230-931923277-594887482-1000:MRBKYMNO\Admin:Interactive:[1]
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1560
    • C:\Users\Admin\AppData\Local\5074bab0-c45c-4fe0-8126-f5dcd5bd52e5\197f5a4cb71e38ea7b56bd1214fbbfc7.exe
      C:\Users\Admin\AppData\Local\5074bab0-c45c-4fe0-8126-f5dcd5bd52e5\197f5a4cb71e38ea7b56bd1214fbbfc7.exe --Task
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetThreadContext
      • Suspicious use of WriteProcessMemory
      PID:1156
      • C:\Users\Admin\AppData\Local\5074bab0-c45c-4fe0-8126-f5dcd5bd52e5\197f5a4cb71e38ea7b56bd1214fbbfc7.exe
        C:\Users\Admin\AppData\Local\5074bab0-c45c-4fe0-8126-f5dcd5bd52e5\197f5a4cb71e38ea7b56bd1214fbbfc7.exe --Task
        3⤵
        • Executes dropped EXE
        • Suspicious behavior: EnumeratesProcesses
        PID:604

Network

        MITRE ATT&CK Enterprise v6

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        Downloads

        memory/288-82-0x0000000000400000-0x00000000004A1000-memory.dmp
        Download

        memory/288-87-0x0000000000400000-0x00000000004A1000-memory.dmp
        Download

        memory/1260-62-0x00000000045E0000-0x00000000046FB000-memory.dmp
        Download

        memory/1776-61-0x0000000076281000-0x0000000076283000-memory.dmp
        Download

        memory/1776-59-0x0000000000400000-0x0000000000537000-memory.dmp
        Download

        memory/1776-63-0x0000000000400000-0x0000000000537000-memory.dmp
        Download

        memory/1784-70-0x0000000000400000-0x0000000000537000-memory.dmp
        Download

        memory/2032-86-0x0000000000300000-0x000000000039E000-memory.dmp
        Download