Analysis

  • max time kernel
    118s
  • max time network
    148s
  • platform
    windows10-1703_x64
  • resource
    win10-20220812-en
  • resource tags

    arch:x64arch:x86image:win10-20220812-enlocale:en-usos:windows10-1703-x64system
  • submitted
    11/10/2022, 10:00

General

  • Target

    671ecb31de42082130537401d27bd404a50c55aa4cfd2e082560c36168715586.exe

  • Size

    729KB

  • MD5

    335d895837cd0451a60057a9b84c81bc

  • SHA1

    a3846bce811b7150c30719f7599e700d0a154816

  • SHA256

    671ecb31de42082130537401d27bd404a50c55aa4cfd2e082560c36168715586

  • SHA512

    c79e7efc35ce76e9c804b78fb5ba8e4137d521d43d43d02e18ec3d9cbb9c73a135cd9f40f88788fe82d5bd997de73a4d8db5ded6953c92d1b002cc477b8cba14

  • SSDEEP

    12288:lR06SIV8mng9ldS/TXgQmLFWAT3i8sDW/9QTHrZ7P8lA4lB3cejjVQ2Kt:lRLpg97S/TXLmTbi8sDy0rZ7PrejjVJi

Malware Config

Extracted

Family

djvu

C2

http://winnlinne.com/lancer/get.php

Attributes
  • extension

    .towz

  • offline_id

    SSHsHMHGmSIhrz50VnIxLJJX15osxEQY6iXedXt1

  • payload_url

    http://rgyui.top/dl/build2.exe

    http://winnlinne.com/files/1/build3.exe

  • ransomnote

    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-Kbx8mJatqN 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: 0577Jhyjd

rsa_pubkey.plain

Extracted

Family

vidar

Version

54.9

Botnet

517

C2

https://t.me/larsenup

https://ioc.exchange/@zebra54

Attributes
  • profile_id

    517

Signatures

  • Detected Djvu ransomware 9 IoCs
  • Djvu Ransomware

    Ransomware which is a variant of the STOP family.

  • Vidar

    Vidar is an infostealer based on Arkei stealer.

  • Downloads MZ/PE file
  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 2 IoCs
  • Modifies file permissions 1 TTPs 1 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
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Checks installed software on the system 1 TTPs

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

  • Looks up external IP address via web service 3 IoCs

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

  • Suspicious use of SetThreadContext 3 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 1 IoCs
  • Checks processor information in registry 2 TTPs 2 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious use of WriteProcessMemory 38 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\671ecb31de42082130537401d27bd404a50c55aa4cfd2e082560c36168715586.exe
    "C:\Users\Admin\AppData\Local\Temp\671ecb31de42082130537401d27bd404a50c55aa4cfd2e082560c36168715586.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:4324
    • C:\Users\Admin\AppData\Local\Temp\671ecb31de42082130537401d27bd404a50c55aa4cfd2e082560c36168715586.exe
      "C:\Users\Admin\AppData\Local\Temp\671ecb31de42082130537401d27bd404a50c55aa4cfd2e082560c36168715586.exe"
      2⤵
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:4000
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\e03f1a30-25fd-41f2-a82e-ae4fad38836e" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:1196
      • C:\Users\Admin\AppData\Local\Temp\671ecb31de42082130537401d27bd404a50c55aa4cfd2e082560c36168715586.exe
        "C:\Users\Admin\AppData\Local\Temp\671ecb31de42082130537401d27bd404a50c55aa4cfd2e082560c36168715586.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:4568
        • C:\Users\Admin\AppData\Local\Temp\671ecb31de42082130537401d27bd404a50c55aa4cfd2e082560c36168715586.exe
          "C:\Users\Admin\AppData\Local\Temp\671ecb31de42082130537401d27bd404a50c55aa4cfd2e082560c36168715586.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:3060
          • C:\Users\Admin\AppData\Local\32c45d7e-8fd4-48d6-a822-6e1223b6093b\build2.exe
            "C:\Users\Admin\AppData\Local\32c45d7e-8fd4-48d6-a822-6e1223b6093b\build2.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious use of WriteProcessMemory
            PID:4108
            • C:\Users\Admin\AppData\Local\32c45d7e-8fd4-48d6-a822-6e1223b6093b\build2.exe
              "C:\Users\Admin\AppData\Local\32c45d7e-8fd4-48d6-a822-6e1223b6093b\build2.exe"
              6⤵
              • Executes dropped EXE
              • Loads dropped DLL
              • Checks processor information in registry
              • Suspicious behavior: EnumeratesProcesses
              PID:1588
              • C:\Windows\SysWOW64\WerFault.exe
                C:\Windows\SysWOW64\WerFault.exe -u -p 1588 -s 1676
                7⤵
                • Program crash
                PID:2160

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D

          Filesize

          2KB

          MD5

          6f59ed058aa06aaf5ec6213b955aabd4

          SHA1

          baf7b828a563b8fb6111e4ce35e0055575ad80b4

          SHA256

          2d82e2629fa2e08f28b43b15da43dff56c7f4b23b39d66109c7c61998e35b4d5

          SHA512

          6b0f041dafb98b9eaf70ac0d20a98c56e1c42231c4a4ae6e11582b20d20bf8f96dfd7747739a10d77368994441adb0e181b356f8569697b1f22ab4fe931170ce

        • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E

          Filesize

          1KB

          MD5

          0698dbc93ba7b6bef73ba316695f8317

          SHA1

          a444078ff1eb7c88f52cb4e324365926b491ed47

          SHA256

          263292040d77903899257c1d21201dc64d6f8d6b5a1d945cd5b28d0124d7906c

          SHA512

          ebacaa7009aebb88199cd70fd0bb3afe69ed300318cb633edd1c0404e42aef829617f589bcbad6cb7ab4bd0a8ae87f7df1435c786184ecc5de61c8fc6950a900

        • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D

          Filesize

          488B

          MD5

          9d0a03ed6d65775047fa11ea4d05d8c5

          SHA1

          1235586fff9749afd94c227a8a4fd9fce5595482

          SHA256

          7e745bc5802049c8c589ecf726ef79f147b8a802e3f04563c047f4b7f27dce3b

          SHA512

          fed832aefad68018493aa66dba1c89d4217199a15724479bb98636971d6f240585ee64f2e3d1d11892a1bf792f775aaed02050a4842e509aceb9f6c4dbad4b51

        • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E

          Filesize

          482B

          MD5

          f528535a07da2196f0da7122161aa0b2

          SHA1

          d309aad6e6f9ec290db7afacd47c4c87b7059886

          SHA256

          f973b8d47fccedc6a527ed42be3534aa10488eea873d3257a0ebea4b34bdb668

          SHA512

          dda17f3fe421556a923e216f3ebc0a138394cf05031712094bb56fa623afa330d946a7b5569670cce48eb34f973f0397e09d51ba63d94faf4e2624179caa1149

        • C:\Users\Admin\AppData\Local\32c45d7e-8fd4-48d6-a822-6e1223b6093b\build2.exe

          Filesize

          255KB

          MD5

          9c3d4324a153c6438f48083bc333a962

          SHA1

          033e80e2008f4f62d2716ce0473bb0d763d52277

          SHA256

          5ee57d85a41b825060864ae85981253f28148d15586a5f6274d562dfeae93e98

          SHA512

          8cce276e59b2fcdb333fecaaa1e3ab9d0b24e25c54a6fc959b6c190441061fab67ea0d35e7077cf910b557b6a60b90c1d2260352b11789bbcd430814fcff51cd

        • C:\Users\Admin\AppData\Local\32c45d7e-8fd4-48d6-a822-6e1223b6093b\build2.exe

          Filesize

          255KB

          MD5

          9c3d4324a153c6438f48083bc333a962

          SHA1

          033e80e2008f4f62d2716ce0473bb0d763d52277

          SHA256

          5ee57d85a41b825060864ae85981253f28148d15586a5f6274d562dfeae93e98

          SHA512

          8cce276e59b2fcdb333fecaaa1e3ab9d0b24e25c54a6fc959b6c190441061fab67ea0d35e7077cf910b557b6a60b90c1d2260352b11789bbcd430814fcff51cd

        • C:\Users\Admin\AppData\Local\32c45d7e-8fd4-48d6-a822-6e1223b6093b\build2.exe

          Filesize

          255KB

          MD5

          9c3d4324a153c6438f48083bc333a962

          SHA1

          033e80e2008f4f62d2716ce0473bb0d763d52277

          SHA256

          5ee57d85a41b825060864ae85981253f28148d15586a5f6274d562dfeae93e98

          SHA512

          8cce276e59b2fcdb333fecaaa1e3ab9d0b24e25c54a6fc959b6c190441061fab67ea0d35e7077cf910b557b6a60b90c1d2260352b11789bbcd430814fcff51cd

        • C:\Users\Admin\AppData\Local\e03f1a30-25fd-41f2-a82e-ae4fad38836e\671ecb31de42082130537401d27bd404a50c55aa4cfd2e082560c36168715586.exe

          Filesize

          729KB

          MD5

          335d895837cd0451a60057a9b84c81bc

          SHA1

          a3846bce811b7150c30719f7599e700d0a154816

          SHA256

          671ecb31de42082130537401d27bd404a50c55aa4cfd2e082560c36168715586

          SHA512

          c79e7efc35ce76e9c804b78fb5ba8e4137d521d43d43d02e18ec3d9cbb9c73a135cd9f40f88788fe82d5bd997de73a4d8db5ded6953c92d1b002cc477b8cba14

        • \ProgramData\mozglue.dll

          Filesize

          593KB

          MD5

          c8fd9be83bc728cc04beffafc2907fe9

          SHA1

          95ab9f701e0024cedfbd312bcfe4e726744c4f2e

          SHA256

          ba06a6ee0b15f5be5c4e67782eec8b521e36c107a329093ec400fe0404eb196a

          SHA512

          fbb446f4a27ef510e616caad52945d6c9cc1fd063812c41947e579ec2b54df57c6dc46237ded80fca5847f38cbe1747a6c66a13e2c8c19c664a72be35eb8b040

        • \ProgramData\nss3.dll

          Filesize

          2.0MB

          MD5

          1cc453cdf74f31e4d913ff9c10acdde2

          SHA1

          6e85eae544d6e965f15fa5c39700fa7202f3aafe

          SHA256

          ac5c92fe6c51cfa742e475215b83b3e11a4379820043263bf50d4068686c6fa5

          SHA512

          dd9ff4e06b00dc831439bab11c10e9b2ae864ea6e780d3835ea7468818f35439f352ef137da111efcdf2bb6465f6ca486719451bf6cf32c6a4420a56b1d64571

        • memory/1588-441-0x0000000000400000-0x000000000045E000-memory.dmp

          Filesize

          376KB

        • memory/1588-480-0x0000000000400000-0x000000000045E000-memory.dmp

          Filesize

          376KB

        • memory/3060-350-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3060-461-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4000-185-0x00000000776D0000-0x000000007785E000-memory.dmp

          Filesize

          1.6MB

        • memory/4000-171-0x00000000776D0000-0x000000007785E000-memory.dmp

          Filesize

          1.6MB

        • memory/4000-250-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4000-205-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4000-184-0x00000000776D0000-0x000000007785E000-memory.dmp

          Filesize

          1.6MB

        • memory/4000-183-0x00000000776D0000-0x000000007785E000-memory.dmp

          Filesize

          1.6MB

        • memory/4000-182-0x00000000776D0000-0x000000007785E000-memory.dmp

          Filesize

          1.6MB

        • memory/4000-181-0x00000000776D0000-0x000000007785E000-memory.dmp

          Filesize

          1.6MB

        • memory/4000-180-0x00000000776D0000-0x000000007785E000-memory.dmp

          Filesize

          1.6MB

        • memory/4000-179-0x00000000776D0000-0x000000007785E000-memory.dmp

          Filesize

          1.6MB

        • memory/4000-178-0x00000000776D0000-0x000000007785E000-memory.dmp

          Filesize

          1.6MB

        • memory/4000-177-0x00000000776D0000-0x000000007785E000-memory.dmp

          Filesize

          1.6MB

        • memory/4000-176-0x00000000776D0000-0x000000007785E000-memory.dmp

          Filesize

          1.6MB

        • memory/4000-148-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4000-151-0x00000000776D0000-0x000000007785E000-memory.dmp

          Filesize

          1.6MB

        • memory/4000-152-0x00000000776D0000-0x000000007785E000-memory.dmp

          Filesize

          1.6MB

        • memory/4000-153-0x00000000776D0000-0x000000007785E000-memory.dmp

          Filesize

          1.6MB

        • memory/4000-154-0x00000000776D0000-0x000000007785E000-memory.dmp

          Filesize

          1.6MB

        • memory/4000-155-0x00000000776D0000-0x000000007785E000-memory.dmp

          Filesize

          1.6MB

        • memory/4000-157-0x00000000776D0000-0x000000007785E000-memory.dmp

          Filesize

          1.6MB

        • memory/4000-156-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4000-158-0x00000000776D0000-0x000000007785E000-memory.dmp

          Filesize

          1.6MB

        • memory/4000-159-0x00000000776D0000-0x000000007785E000-memory.dmp

          Filesize

          1.6MB

        • memory/4000-160-0x00000000776D0000-0x000000007785E000-memory.dmp

          Filesize

          1.6MB

        • memory/4000-161-0x00000000776D0000-0x000000007785E000-memory.dmp

          Filesize

          1.6MB

        • memory/4000-162-0x00000000776D0000-0x000000007785E000-memory.dmp

          Filesize

          1.6MB

        • memory/4000-163-0x00000000776D0000-0x000000007785E000-memory.dmp

          Filesize

          1.6MB

        • memory/4000-164-0x00000000776D0000-0x000000007785E000-memory.dmp

          Filesize

          1.6MB

        • memory/4000-165-0x00000000776D0000-0x000000007785E000-memory.dmp

          Filesize

          1.6MB

        • memory/4000-166-0x00000000776D0000-0x000000007785E000-memory.dmp

          Filesize

          1.6MB

        • memory/4000-167-0x00000000776D0000-0x000000007785E000-memory.dmp

          Filesize

          1.6MB

        • memory/4000-168-0x00000000776D0000-0x000000007785E000-memory.dmp

          Filesize

          1.6MB

        • memory/4000-169-0x00000000776D0000-0x000000007785E000-memory.dmp

          Filesize

          1.6MB

        • memory/4000-170-0x00000000776D0000-0x000000007785E000-memory.dmp

          Filesize

          1.6MB

        • memory/4000-175-0x00000000776D0000-0x000000007785E000-memory.dmp

          Filesize

          1.6MB

        • memory/4000-172-0x00000000776D0000-0x000000007785E000-memory.dmp

          Filesize

          1.6MB

        • memory/4000-173-0x00000000776D0000-0x000000007785E000-memory.dmp

          Filesize

          1.6MB

        • memory/4000-174-0x00000000776D0000-0x000000007785E000-memory.dmp

          Filesize

          1.6MB

        • memory/4108-394-0x0000000002190000-0x00000000021DA000-memory.dmp

          Filesize

          296KB

        • memory/4324-133-0x00000000776D0000-0x000000007785E000-memory.dmp

          Filesize

          1.6MB

        • memory/4324-131-0x00000000776D0000-0x000000007785E000-memory.dmp

          Filesize

          1.6MB

        • memory/4324-145-0x00000000776D0000-0x000000007785E000-memory.dmp

          Filesize

          1.6MB

        • memory/4324-144-0x00000000776D0000-0x000000007785E000-memory.dmp

          Filesize

          1.6MB

        • memory/4324-143-0x00000000776D0000-0x000000007785E000-memory.dmp

          Filesize

          1.6MB

        • memory/4324-142-0x00000000776D0000-0x000000007785E000-memory.dmp

          Filesize

          1.6MB

        • memory/4324-141-0x00000000776D0000-0x000000007785E000-memory.dmp

          Filesize

          1.6MB

        • memory/4324-139-0x00000000776D0000-0x000000007785E000-memory.dmp

          Filesize

          1.6MB

        • memory/4324-118-0x00000000776D0000-0x000000007785E000-memory.dmp

          Filesize

          1.6MB

        • memory/4324-138-0x00000000776D0000-0x000000007785E000-memory.dmp

          Filesize

          1.6MB

        • memory/4324-135-0x00000000776D0000-0x000000007785E000-memory.dmp

          Filesize

          1.6MB

        • memory/4324-134-0x00000000776D0000-0x000000007785E000-memory.dmp

          Filesize

          1.6MB

        • memory/4324-119-0x00000000776D0000-0x000000007785E000-memory.dmp

          Filesize

          1.6MB

        • memory/4324-137-0x00000000776D0000-0x000000007785E000-memory.dmp

          Filesize

          1.6MB

        • memory/4324-146-0x00000000776D0000-0x000000007785E000-memory.dmp

          Filesize

          1.6MB

        • memory/4324-136-0x00000000776D0000-0x000000007785E000-memory.dmp

          Filesize

          1.6MB

        • memory/4324-129-0x00000000776D0000-0x000000007785E000-memory.dmp

          Filesize

          1.6MB

        • memory/4324-130-0x00000000776D0000-0x000000007785E000-memory.dmp

          Filesize

          1.6MB

        • memory/4324-132-0x00000000776D0000-0x000000007785E000-memory.dmp

          Filesize

          1.6MB

        • memory/4324-128-0x00000000776D0000-0x000000007785E000-memory.dmp

          Filesize

          1.6MB

        • memory/4324-147-0x0000000002360000-0x00000000023FE000-memory.dmp

          Filesize

          632KB

        • memory/4324-127-0x00000000776D0000-0x000000007785E000-memory.dmp

          Filesize

          1.6MB

        • memory/4324-126-0x00000000776D0000-0x000000007785E000-memory.dmp

          Filesize

          1.6MB

        • memory/4324-125-0x00000000776D0000-0x000000007785E000-memory.dmp

          Filesize

          1.6MB

        • memory/4324-124-0x00000000776D0000-0x000000007785E000-memory.dmp

          Filesize

          1.6MB

        • memory/4324-150-0x00000000024A0000-0x00000000025BB000-memory.dmp

          Filesize

          1.1MB

        • memory/4324-123-0x00000000776D0000-0x000000007785E000-memory.dmp

          Filesize

          1.6MB

        • memory/4324-122-0x00000000776D0000-0x000000007785E000-memory.dmp

          Filesize

          1.6MB

        • memory/4324-121-0x00000000776D0000-0x000000007785E000-memory.dmp

          Filesize

          1.6MB

        • memory/4324-120-0x00000000776D0000-0x000000007785E000-memory.dmp

          Filesize

          1.6MB