Analysis

  • max time kernel
    98s
  • max time network
    141s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • submitted
    24/04/2022, 13:47

General

  • Target

    373ec048b42907a0c5a80262e265c093effeb1a932d2efc507b5f9a2ac4c4502.exe

  • Size

    727KB

  • MD5

    258db065e78278e7f5bf235ee54e96c2

  • SHA1

    c2aa27c506115868507707c971f43ae3313c9c11

  • SHA256

    373ec048b42907a0c5a80262e265c093effeb1a932d2efc507b5f9a2ac4c4502

  • SHA512

    163ddaaad60458aed9d747aff241a38ece5d262b55687c43afd14635aeeb34e7e594b4494f08c9c5efbe0466f3aecc43fa5e49ffbf77d22abb5000f525afa9c5

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 2 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\373ec048b42907a0c5a80262e265c093effeb1a932d2efc507b5f9a2ac4c4502.exe
    "C:\Users\Admin\AppData\Local\Temp\373ec048b42907a0c5a80262e265c093effeb1a932d2efc507b5f9a2ac4c4502.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:3116
    • C:\Users\Admin\AppData\Local\Temp\373ec048b42907a0c5a80262e265c093effeb1a932d2efc507b5f9a2ac4c4502.exe
      "C:\Users\Admin\AppData\Local\Temp\373ec048b42907a0c5a80262e265c093effeb1a932d2efc507b5f9a2ac4c4502.exe"
      2⤵
      • Checks computer location settings
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:3308
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\047438fe-ecfd-43b2-a240-793dd157176e" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:2116
      • C:\Users\Admin\AppData\Local\Temp\373ec048b42907a0c5a80262e265c093effeb1a932d2efc507b5f9a2ac4c4502.exe
        "C:\Users\Admin\AppData\Local\Temp\373ec048b42907a0c5a80262e265c093effeb1a932d2efc507b5f9a2ac4c4502.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:5036
        • C:\Users\Admin\AppData\Local\Temp\373ec048b42907a0c5a80262e265c093effeb1a932d2efc507b5f9a2ac4c4502.exe
          "C:\Users\Admin\AppData\Local\Temp\373ec048b42907a0c5a80262e265c093effeb1a932d2efc507b5f9a2ac4c4502.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Checks computer location settings
          • Modifies system certificate store
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:3060
          • C:\Users\Admin\AppData\Local\dfab126f-2125-4e1d-ae14-f9fad2aeb2ff\build2.exe
            "C:\Users\Admin\AppData\Local\dfab126f-2125-4e1d-ae14-f9fad2aeb2ff\build2.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious use of WriteProcessMemory
            PID:3192
            • C:\Users\Admin\AppData\Local\dfab126f-2125-4e1d-ae14-f9fad2aeb2ff\build2.exe
              "C:\Users\Admin\AppData\Local\dfab126f-2125-4e1d-ae14-f9fad2aeb2ff\build2.exe"
              6⤵
              • Executes dropped EXE
              • Loads dropped DLL
              • Checks processor information in registry
              • Suspicious behavior: EnumeratesProcesses
              PID:4156

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

        Loading Replay Monitor...

        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\Local\047438fe-ecfd-43b2-a240-793dd157176e\373ec048b42907a0c5a80262e265c093effeb1a932d2efc507b5f9a2ac4c4502.exe

          Filesize

          727KB

          MD5

          258db065e78278e7f5bf235ee54e96c2

          SHA1

          c2aa27c506115868507707c971f43ae3313c9c11

          SHA256

          373ec048b42907a0c5a80262e265c093effeb1a932d2efc507b5f9a2ac4c4502

          SHA512

          163ddaaad60458aed9d747aff241a38ece5d262b55687c43afd14635aeeb34e7e594b4494f08c9c5efbe0466f3aecc43fa5e49ffbf77d22abb5000f525afa9c5

        • C:\Users\Admin\AppData\Local\dfab126f-2125-4e1d-ae14-f9fad2aeb2ff\build2.exe

          Filesize

          368KB

          MD5

          ad1b502b6714c0a374b055332018974b

          SHA1

          672f4e44475177ddcb1bfa73db3c5dee0f031bc2

          SHA256

          f2cfbc265125aca3cbf385120f7489e8044f444976ba43ee3a19e706257c9e95

          SHA512

          0197d74e6eb9fa11d48e6939dbd091c6896908870a59fef1d40830e43caf2539fd03ac933d47eae4c3b0ec74e2bfb0ece7f44c4a525b075fe4235ca6086c355e

        • C:\Users\Admin\AppData\Local\dfab126f-2125-4e1d-ae14-f9fad2aeb2ff\build2.exe

          Filesize

          368KB

          MD5

          ad1b502b6714c0a374b055332018974b

          SHA1

          672f4e44475177ddcb1bfa73db3c5dee0f031bc2

          SHA256

          f2cfbc265125aca3cbf385120f7489e8044f444976ba43ee3a19e706257c9e95

          SHA512

          0197d74e6eb9fa11d48e6939dbd091c6896908870a59fef1d40830e43caf2539fd03ac933d47eae4c3b0ec74e2bfb0ece7f44c4a525b075fe4235ca6086c355e

        • C:\Users\Admin\AppData\Local\dfab126f-2125-4e1d-ae14-f9fad2aeb2ff\build2.exe

          Filesize

          368KB

          MD5

          ad1b502b6714c0a374b055332018974b

          SHA1

          672f4e44475177ddcb1bfa73db3c5dee0f031bc2

          SHA256

          f2cfbc265125aca3cbf385120f7489e8044f444976ba43ee3a19e706257c9e95

          SHA512

          0197d74e6eb9fa11d48e6939dbd091c6896908870a59fef1d40830e43caf2539fd03ac933d47eae4c3b0ec74e2bfb0ece7f44c4a525b075fe4235ca6086c355e

        • memory/3060-144-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3060-145-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3060-142-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3116-133-0x0000000002195000-0x0000000002226000-memory.dmp

          Filesize

          580KB

        • memory/3116-134-0x0000000002230000-0x000000000234B000-memory.dmp

          Filesize

          1.1MB

        • memory/3192-149-0x0000000000809000-0x0000000000833000-memory.dmp

          Filesize

          168KB

        • memory/3192-155-0x0000000002090000-0x00000000020D9000-memory.dmp

          Filesize

          292KB

        • memory/3192-153-0x0000000000809000-0x0000000000833000-memory.dmp

          Filesize

          168KB

        • memory/3308-131-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3308-136-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3308-135-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3308-132-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4156-154-0x0000000000400000-0x000000000044C000-memory.dmp

          Filesize

          304KB

        • memory/4156-151-0x0000000000400000-0x000000000044C000-memory.dmp

          Filesize

          304KB

        • memory/4156-156-0x0000000000400000-0x000000000044C000-memory.dmp

          Filesize

          304KB

        • memory/4156-157-0x0000000000400000-0x000000000044C000-memory.dmp

          Filesize

          304KB

        • memory/5036-143-0x00000000009E1000-0x0000000000A72000-memory.dmp

          Filesize

          580KB