Analysis

  • max time kernel
    111s
  • max time network
    135s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • submitted
    25-04-2022 02:10

General

  • Target

    buildp.exe

  • Size

    841KB

  • MD5

    efed57771cb41fdde63781d1e195912c

  • SHA1

    a71b0545951c99eb6ad4a50c22d02c958003d920

  • SHA256

    72cd1426f13a698c7d63a288f4920147812303e8f10a4e66e414cc7c2206381d

  • SHA512

    6fd84f80ba5f3c53f48a6a0135cedc7b489cca419742e043116468bcda0898398dd7ddff4ac7d0d8b283312d4c411790b8ff74276f14016021597498b306a080

Malware Config

Extracted

Family

djvu

C2

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

Attributes
  • extension

    .gtys

  • offline_id

    qwVQoIsE2xLety0oNWloOilSDuIBXJGK86LM3ot1

  • 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-fnn5kv33Vv 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: 0439JIjdm

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\buildp.exe
    "C:\Users\Admin\AppData\Local\Temp\buildp.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:4872
    • C:\Users\Admin\AppData\Local\Temp\buildp.exe
      "C:\Users\Admin\AppData\Local\Temp\buildp.exe"
      2⤵
      • Checks computer location settings
      • Adds Run key to start application
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:4440
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\17416b26-2de7-45b1-b121-694f4a9393f2" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:3244
      • C:\Users\Admin\AppData\Local\Temp\buildp.exe
        "C:\Users\Admin\AppData\Local\Temp\buildp.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:4620
        • C:\Users\Admin\AppData\Local\Temp\buildp.exe
          "C:\Users\Admin\AppData\Local\Temp\buildp.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Checks computer location settings
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:5084
          • C:\Users\Admin\AppData\Local\eae86473-7594-41c4-af13-c5f97b042f1d\build2.exe
            "C:\Users\Admin\AppData\Local\eae86473-7594-41c4-af13-c5f97b042f1d\build2.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious use of WriteProcessMemory
            PID:3580
            • C:\Users\Admin\AppData\Local\eae86473-7594-41c4-af13-c5f97b042f1d\build2.exe
              "C:\Users\Admin\AppData\Local\eae86473-7594-41c4-af13-c5f97b042f1d\build2.exe"
              6⤵
              • Executes dropped EXE
              • Loads dropped DLL
              • Checks processor information in registry
              • Suspicious behavior: EnumeratesProcesses
              PID:1488

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\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

    aefbcbdb4c3ead0fedf058228a7dd7d4

    SHA1

    12413140a4f741430eb21b805ea3521125ba9bb2

    SHA256

    deb7239a01b556b45d514902f660fee8ec2c3f9b68a6dccd98236b57972518eb

    SHA512

    89713c615c2c832114615af9cc2a8ca05a65cb9d4966a0804fda417c9cce5c6901c00ba3810e6dd7c4b8416e7584325ed1e81c448411e920fd5252c5b91a01a1

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

    Filesize

    396B

    MD5

    fc2d41214c26ad1de70010511a003967

    SHA1

    8da1e49ba2453326564257516f8f2e2948821ee5

    SHA256

    696f558aec10f588f100478c862e65c33b820c1704239653181f1a89daaa0d63

    SHA512

    c870a169bd8149a38c6baecaf09e495b80f441093a763d0d69c10b1373745e0d93ad85973a8f83deded59780105332a8142c2c59675c303a9bebc6a3e40baa3b

  • C:\Users\Admin\AppData\Local\17416b26-2de7-45b1-b121-694f4a9393f2\buildp.exe

    Filesize

    841KB

    MD5

    efed57771cb41fdde63781d1e195912c

    SHA1

    a71b0545951c99eb6ad4a50c22d02c958003d920

    SHA256

    72cd1426f13a698c7d63a288f4920147812303e8f10a4e66e414cc7c2206381d

    SHA512

    6fd84f80ba5f3c53f48a6a0135cedc7b489cca419742e043116468bcda0898398dd7ddff4ac7d0d8b283312d4c411790b8ff74276f14016021597498b306a080

  • C:\Users\Admin\AppData\Local\eae86473-7594-41c4-af13-c5f97b042f1d\build2.exe

    Filesize

    368KB

    MD5

    ad1b502b6714c0a374b055332018974b

    SHA1

    672f4e44475177ddcb1bfa73db3c5dee0f031bc2

    SHA256

    f2cfbc265125aca3cbf385120f7489e8044f444976ba43ee3a19e706257c9e95

    SHA512

    0197d74e6eb9fa11d48e6939dbd091c6896908870a59fef1d40830e43caf2539fd03ac933d47eae4c3b0ec74e2bfb0ece7f44c4a525b075fe4235ca6086c355e

  • C:\Users\Admin\AppData\Local\eae86473-7594-41c4-af13-c5f97b042f1d\build2.exe

    Filesize

    368KB

    MD5

    ad1b502b6714c0a374b055332018974b

    SHA1

    672f4e44475177ddcb1bfa73db3c5dee0f031bc2

    SHA256

    f2cfbc265125aca3cbf385120f7489e8044f444976ba43ee3a19e706257c9e95

    SHA512

    0197d74e6eb9fa11d48e6939dbd091c6896908870a59fef1d40830e43caf2539fd03ac933d47eae4c3b0ec74e2bfb0ece7f44c4a525b075fe4235ca6086c355e

  • C:\Users\Admin\AppData\Local\eae86473-7594-41c4-af13-c5f97b042f1d\build2.exe

    Filesize

    368KB

    MD5

    ad1b502b6714c0a374b055332018974b

    SHA1

    672f4e44475177ddcb1bfa73db3c5dee0f031bc2

    SHA256

    f2cfbc265125aca3cbf385120f7489e8044f444976ba43ee3a19e706257c9e95

    SHA512

    0197d74e6eb9fa11d48e6939dbd091c6896908870a59fef1d40830e43caf2539fd03ac933d47eae4c3b0ec74e2bfb0ece7f44c4a525b075fe4235ca6086c355e

  • memory/1488-161-0x0000000060900000-0x0000000060992000-memory.dmp

    Filesize

    584KB

  • memory/1488-160-0x0000000000400000-0x000000000044C000-memory.dmp

    Filesize

    304KB

  • memory/1488-159-0x0000000000400000-0x000000000044C000-memory.dmp

    Filesize

    304KB

  • memory/1488-156-0x0000000000400000-0x000000000044C000-memory.dmp

    Filesize

    304KB

  • memory/1488-154-0x0000000000400000-0x000000000044C000-memory.dmp

    Filesize

    304KB

  • memory/3580-157-0x00000000004E8000-0x0000000000513000-memory.dmp

    Filesize

    172KB

  • memory/3580-158-0x00000000020E0000-0x0000000002129000-memory.dmp

    Filesize

    292KB

  • memory/4440-136-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4440-133-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4440-135-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4440-134-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4620-143-0x0000000002232000-0x00000000022C3000-memory.dmp

    Filesize

    580KB

  • memory/4872-130-0x00000000021EC000-0x000000000227D000-memory.dmp

    Filesize

    580KB

  • memory/4872-131-0x0000000002280000-0x000000000239B000-memory.dmp

    Filesize

    1.1MB

  • memory/5084-145-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/5084-144-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/5084-142-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB