Analysis

  • max time kernel
    100s
  • max time network
    144s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • submitted
    24/04/2022, 17:27

General

  • Target

    b92a587e4d9c109b7ed4915a2568be502a989d5ce36668a184244be7437846d9.exe

  • Size

    727KB

  • MD5

    4cdf609d21d2c966d9890920a9918999

  • SHA1

    332e54ed884feb3d64d46feeccfb144bb9fc4127

  • SHA256

    b92a587e4d9c109b7ed4915a2568be502a989d5ce36668a184244be7437846d9

  • SHA512

    860d5ed3fd6d6bf362fe900029f2b812a145c97702355e316583742c565ba848100857539fa136d810e452d433663156e4fe72837269e80d6103ad0fa8825811

Malware Config

Extracted

Family

djvu

C2

http://fuyt.org/fhsgtsspen6/get.php

Attributes
  • extension

    .dmay

  • offline_id

    Xe4NOamOTHZrARTiL9dfVzAylFrEWLGGbr2dngt1

  • payload_url

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

    http://fuyt.org/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-FT7BNVbXC9 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: 0458JIjdm

rsa_pubkey.plain

Extracted

Family

vidar

Version

51.8

Botnet

517

C2

https://t.me/mm20220428

https://koyu.space/@ronxik123

Attributes
  • profile_id

    517

Signatures

  • Detected Djvu ransomware 8 IoCs
  • Djvu Ransomware

    Ransomware which is a variant of the STOP family.

  • Vidar

    Vidar is an infostealer based on Arkei stealer.

  • suricata: ET MALWARE Potential Dridex.Maldoc Minimal Executable Request

    suricata: ET MALWARE Potential Dridex.Maldoc Minimal Executable Request

  • Vidar Stealer 5 IoCs
  • Downloads MZ/PE file
  • Executes dropped EXE 2 IoCs
  • Checks computer location settings 2 TTPs 2 IoCs

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

  • 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.

  • Checks processor information in registry 2 TTPs 2 IoCs

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

  • Modifies system certificate store 2 TTPs 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 12 IoCs
  • Suspicious use of WriteProcessMemory 37 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\b92a587e4d9c109b7ed4915a2568be502a989d5ce36668a184244be7437846d9.exe
    "C:\Users\Admin\AppData\Local\Temp\b92a587e4d9c109b7ed4915a2568be502a989d5ce36668a184244be7437846d9.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:3888
    • C:\Users\Admin\AppData\Local\Temp\b92a587e4d9c109b7ed4915a2568be502a989d5ce36668a184244be7437846d9.exe
      "C:\Users\Admin\AppData\Local\Temp\b92a587e4d9c109b7ed4915a2568be502a989d5ce36668a184244be7437846d9.exe"
      2⤵
      • Checks computer location settings
      • Adds Run key to start application
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:300
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\bf710cb3-9dc9-46da-8a84-bb8e0cacbfe4" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:2348
      • C:\Users\Admin\AppData\Local\Temp\b92a587e4d9c109b7ed4915a2568be502a989d5ce36668a184244be7437846d9.exe
        "C:\Users\Admin\AppData\Local\Temp\b92a587e4d9c109b7ed4915a2568be502a989d5ce36668a184244be7437846d9.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:4572
        • C:\Users\Admin\AppData\Local\Temp\b92a587e4d9c109b7ed4915a2568be502a989d5ce36668a184244be7437846d9.exe
          "C:\Users\Admin\AppData\Local\Temp\b92a587e4d9c109b7ed4915a2568be502a989d5ce36668a184244be7437846d9.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Checks computer location settings
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:1632
          • C:\Users\Admin\AppData\Local\f99b5b11-8a07-4d3a-b910-980d4931a3e7\build2.exe
            "C:\Users\Admin\AppData\Local\f99b5b11-8a07-4d3a-b910-980d4931a3e7\build2.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious use of WriteProcessMemory
            PID:1508
            • C:\Users\Admin\AppData\Local\f99b5b11-8a07-4d3a-b910-980d4931a3e7\build2.exe
              "C:\Users\Admin\AppData\Local\f99b5b11-8a07-4d3a-b910-980d4931a3e7\build2.exe"
              6⤵
              • Executes dropped EXE
              • Loads dropped DLL
              • Checks processor information in registry
              • Suspicious behavior: EnumeratesProcesses
              PID:1236

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        • C:\ProgramData\mozglue.dll

          Filesize

          133KB

          MD5

          8f73c08a9660691143661bf7332c3c27

          SHA1

          37fa65dd737c50fda710fdbde89e51374d0c204a

          SHA256

          3fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd

          SHA512

          0042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89

        • C:\ProgramData\nss3.dll

          Filesize

          1.2MB

          MD5

          bfac4e3c5908856ba17d41edcd455a51

          SHA1

          8eec7e888767aa9e4cca8ff246eb2aacb9170428

          SHA256

          e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78

          SHA512

          2565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66

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

          Filesize

          727B

          MD5

          d9c694c2d95c6812aa0be903de46da96

          SHA1

          df1a733a9c6c27997c798ae4c5715cabe1ffa5e4

          SHA256

          f6f85bc0d1770803a206fbfb83c4cb888b3a24b494feac38baa3ea764cda37c0

          SHA512

          97a2eddf197aa74d1d05241008ead092f836b561bc1ad1d731d91db23d6dcce7a65d3dc1609384a3ad3fd5c858bae6c3a4361588b5a965ebf233f14410864793

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

          Filesize

          471B

          MD5

          ad8e032271f02af2a955ce10661cc3a8

          SHA1

          967d1bd99bea34c3110cc75c0c0d8b8565eae9f9

          SHA256

          d5081bf75d530e9336a6da0f9142bc10f4d06368c365cf0e33f7c99b0f643ce8

          SHA512

          bc69dfb03284cf1b8d172ff55938f238b928a0c7846306d8232ab697f54c771a9acf8b0e04a85e149da87ea8cfd9395605d0d95afc30eae1793e91399aa7eef7

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

          Filesize

          402B

          MD5

          155af151119a7e7f3588597acc5ac13c

          SHA1

          1204230ab9b64824bdcb31a0e7565498107d3860

          SHA256

          56e3707c5e4dc986b84ba83d1c8e3046813b750885a4da8aa2df94eed0483775

          SHA512

          b1ac9eeaf2fb13b8cf8383188ecc43d98d301f06f03d00d47df98a70569504c5acf3d56d1e218428b075041e9741b4945ceb1a71a0cf521534892af234fa33f3

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

          Filesize

          396B

          MD5

          5ba6526c3786bf0b58596c38ac21b8b7

          SHA1

          b23893baaba95bde2c15efc611060611e650b154

          SHA256

          d8dadf5afe3f2989a26eb2c6a65f4b1f50a779ee999e563423bcf86f1e0af12c

          SHA512

          b2c5dee374c8a1396f90b9288be626cf11d315ad33fd8f9d02080a6d2d2837eb9b596e0da07c8549c2a5c207404c23135c2305d26d1e6cc43ba8f15c2f4dca74

        • C:\Users\Admin\AppData\Local\bf710cb3-9dc9-46da-8a84-bb8e0cacbfe4\b92a587e4d9c109b7ed4915a2568be502a989d5ce36668a184244be7437846d9.exe

          Filesize

          727KB

          MD5

          4cdf609d21d2c966d9890920a9918999

          SHA1

          332e54ed884feb3d64d46feeccfb144bb9fc4127

          SHA256

          b92a587e4d9c109b7ed4915a2568be502a989d5ce36668a184244be7437846d9

          SHA512

          860d5ed3fd6d6bf362fe900029f2b812a145c97702355e316583742c565ba848100857539fa136d810e452d433663156e4fe72837269e80d6103ad0fa8825811

        • C:\Users\Admin\AppData\Local\f99b5b11-8a07-4d3a-b910-980d4931a3e7\build2.exe

          Filesize

          368KB

          MD5

          ad1b502b6714c0a374b055332018974b

          SHA1

          672f4e44475177ddcb1bfa73db3c5dee0f031bc2

          SHA256

          f2cfbc265125aca3cbf385120f7489e8044f444976ba43ee3a19e706257c9e95

          SHA512

          0197d74e6eb9fa11d48e6939dbd091c6896908870a59fef1d40830e43caf2539fd03ac933d47eae4c3b0ec74e2bfb0ece7f44c4a525b075fe4235ca6086c355e

        • C:\Users\Admin\AppData\Local\f99b5b11-8a07-4d3a-b910-980d4931a3e7\build2.exe

          Filesize

          368KB

          MD5

          ad1b502b6714c0a374b055332018974b

          SHA1

          672f4e44475177ddcb1bfa73db3c5dee0f031bc2

          SHA256

          f2cfbc265125aca3cbf385120f7489e8044f444976ba43ee3a19e706257c9e95

          SHA512

          0197d74e6eb9fa11d48e6939dbd091c6896908870a59fef1d40830e43caf2539fd03ac933d47eae4c3b0ec74e2bfb0ece7f44c4a525b075fe4235ca6086c355e

        • C:\Users\Admin\AppData\Local\f99b5b11-8a07-4d3a-b910-980d4931a3e7\build2.exe

          Filesize

          368KB

          MD5

          ad1b502b6714c0a374b055332018974b

          SHA1

          672f4e44475177ddcb1bfa73db3c5dee0f031bc2

          SHA256

          f2cfbc265125aca3cbf385120f7489e8044f444976ba43ee3a19e706257c9e95

          SHA512

          0197d74e6eb9fa11d48e6939dbd091c6896908870a59fef1d40830e43caf2539fd03ac933d47eae4c3b0ec74e2bfb0ece7f44c4a525b075fe4235ca6086c355e

        • memory/300-136-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/300-134-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/300-132-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/300-131-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/1236-155-0x0000000000400000-0x000000000044C000-memory.dmp

          Filesize

          304KB

        • memory/1236-161-0x0000000000400000-0x000000000044C000-memory.dmp

          Filesize

          304KB

        • memory/1236-160-0x0000000000400000-0x000000000044C000-memory.dmp

          Filesize

          304KB

        • memory/1236-157-0x0000000000400000-0x000000000044C000-memory.dmp

          Filesize

          304KB

        • memory/1508-153-0x0000000000839000-0x0000000000864000-memory.dmp

          Filesize

          172KB

        • memory/1508-158-0x0000000000839000-0x0000000000864000-memory.dmp

          Filesize

          172KB

        • memory/1508-159-0x00000000005E0000-0x0000000000629000-memory.dmp

          Filesize

          292KB

        • memory/1632-147-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/1632-143-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/1632-144-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3888-135-0x00000000021F0000-0x000000000230B000-memory.dmp

          Filesize

          1.1MB

        • memory/3888-133-0x0000000002152000-0x00000000021E4000-memory.dmp

          Filesize

          584KB

        • memory/4572-142-0x0000000002171000-0x0000000002203000-memory.dmp

          Filesize

          584KB