Analysis

  • max time kernel
    91s
  • max time network
    168s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • submitted
    19-04-2022 09:49

General

  • Target

    41987b4c88213f610dfb980e25f64ef08b05d1d1445e281e34120037fa888a21.exe

  • Size

    762KB

  • MD5

    f1db9cd4c0474063f5b155e455208790

  • SHA1

    cf51f69e65ad53e03a85244e0b3e2aafb395d378

  • SHA256

    41987b4c88213f610dfb980e25f64ef08b05d1d1445e281e34120037fa888a21

  • SHA512

    e4b9c9bb63de175dbbf9f48041f19961deda356153bc1add007d1b89b2375d800eb6083ba426719149fc5185c9a4c419343fb6f5f2d82020b614b2e9645a24b7

Malware Config

Extracted

Family

djvu

C2

http://fuyt.org/test1/get.php

Attributes
  • extension

    .dwqs

  • offline_id

    PfLhykvDxmCghCq8peuxBtQ3c0QBuANi8WUkuet1

  • 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-c565B1ILoZ 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: 0450Jbdio

rsa_pubkey.plain

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.

  • 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\41987b4c88213f610dfb980e25f64ef08b05d1d1445e281e34120037fa888a21.exe
    "C:\Users\Admin\AppData\Local\Temp\41987b4c88213f610dfb980e25f64ef08b05d1d1445e281e34120037fa888a21.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2448
    • C:\Users\Admin\AppData\Local\Temp\41987b4c88213f610dfb980e25f64ef08b05d1d1445e281e34120037fa888a21.exe
      "C:\Users\Admin\AppData\Local\Temp\41987b4c88213f610dfb980e25f64ef08b05d1d1445e281e34120037fa888a21.exe"
      2⤵
      • Checks computer location settings
      • Adds Run key to start application
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:3100
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\c20adb6b-2c8d-4722-859a-4f09719dbbc7" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:2768
      • C:\Users\Admin\AppData\Local\Temp\41987b4c88213f610dfb980e25f64ef08b05d1d1445e281e34120037fa888a21.exe
        "C:\Users\Admin\AppData\Local\Temp\41987b4c88213f610dfb980e25f64ef08b05d1d1445e281e34120037fa888a21.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2996
        • C:\Users\Admin\AppData\Local\Temp\41987b4c88213f610dfb980e25f64ef08b05d1d1445e281e34120037fa888a21.exe
          "C:\Users\Admin\AppData\Local\Temp\41987b4c88213f610dfb980e25f64ef08b05d1d1445e281e34120037fa888a21.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Checks computer location settings
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:4332
          • C:\Users\Admin\AppData\Local\ac9b6023-47b7-4525-8dde-0c671563a71e\build2.exe
            "C:\Users\Admin\AppData\Local\ac9b6023-47b7-4525-8dde-0c671563a71e\build2.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious use of WriteProcessMemory
            PID:864
            • C:\Users\Admin\AppData\Local\ac9b6023-47b7-4525-8dde-0c671563a71e\build2.exe
              "C:\Users\Admin\AppData\Local\ac9b6023-47b7-4525-8dde-0c671563a71e\build2.exe"
              6⤵
              • Executes dropped EXE
              • Loads dropped DLL
              • Checks processor information in registry
              • Suspicious behavior: EnumeratesProcesses
              PID:224

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

    944e0b205b374bae5a5ec6f004e0ccdc

    SHA1

    0f227641cff488a8610faf4151241c7d3b387358

    SHA256

    a27baf0aef166a0570dd5543e141fb1f97b8d6d19bf2dc1e91ee532b93927286

    SHA512

    fd1a8ea4a418817a4001af2a351d0cdce2ca25a0c5c65b762e42b5d15e57cba4a514b2169dc52946bcc168dbbdbce7b930a4e08cd3cbdc5acf3cf94d57d42007

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

    Filesize

    471B

    MD5

    7443608ab0c5be3ff317d4072fd2a4c1

    SHA1

    c14ca7d35ca32880627b147d57b520466ebb5213

    SHA256

    d4ab6ff49fb6c573a076269888c063cba4d52e9c2d0a03b488559e510df57ab2

    SHA512

    06adf1d67845a438089a93f00603ddfd734966673af1617493652d136bbaf0775c4fb64f15e4aad0caef105604414d09c756f2fee1b2d73396ad1eb93ba0f322

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

    Filesize

    402B

    MD5

    964ea5703fb652e9bff4bde369a15970

    SHA1

    061cac2a2a80f1b6d46039fa5b39ca10a4868d0f

    SHA256

    2a19c1c6f20688b24d60d73cbdc06710cf791db1e5973af7e6df9dccf787faa9

    SHA512

    513bcb578e0fb76f112f8983cc4d662848527009e4c9dba99a7fc00a16ac47d234710c9a77e80d1e24395e9ff0bc345b3d94087dbdb9dfac8b56e21256e05fa6

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

    Filesize

    396B

    MD5

    50d6cf730e0b57ca4fa12011b5b0b04a

    SHA1

    48278131f9cc7f1ba8c423a7ed62ba32e10733bf

    SHA256

    e472a66c6bddaeabba180a3d67b74f0959a576343a9455088511a10eb283e345

    SHA512

    f79a1c213c19d2ee232d5e05b8a0ea053a7b64cc20758f86a73b1dab8fd706d5cbdaadf2fa7c4e1764932d03b9c211c37cc7470280b80948f597b6559d8ad6c0

  • C:\Users\Admin\AppData\Local\ac9b6023-47b7-4525-8dde-0c671563a71e\build2.exe

    Filesize

    603KB

    MD5

    a13e3b18282318c65f096bad322b3c50

    SHA1

    2c76179e95e583b588bcd516e94e7a2da52d5299

    SHA256

    ba981a94852325debf0e4b478266f6efd8e4e9c5b149fd9ad277be0be5045768

    SHA512

    acb009f4b622ab7e8729dac2c45da975ba2305612c9575e5c8ce221edecf2d49da2236fc28b00d8f424a251765b935d8acce7bf40a1557d9fc79ba446250e786

  • C:\Users\Admin\AppData\Local\ac9b6023-47b7-4525-8dde-0c671563a71e\build2.exe

    Filesize

    603KB

    MD5

    a13e3b18282318c65f096bad322b3c50

    SHA1

    2c76179e95e583b588bcd516e94e7a2da52d5299

    SHA256

    ba981a94852325debf0e4b478266f6efd8e4e9c5b149fd9ad277be0be5045768

    SHA512

    acb009f4b622ab7e8729dac2c45da975ba2305612c9575e5c8ce221edecf2d49da2236fc28b00d8f424a251765b935d8acce7bf40a1557d9fc79ba446250e786

  • C:\Users\Admin\AppData\Local\ac9b6023-47b7-4525-8dde-0c671563a71e\build2.exe

    Filesize

    603KB

    MD5

    a13e3b18282318c65f096bad322b3c50

    SHA1

    2c76179e95e583b588bcd516e94e7a2da52d5299

    SHA256

    ba981a94852325debf0e4b478266f6efd8e4e9c5b149fd9ad277be0be5045768

    SHA512

    acb009f4b622ab7e8729dac2c45da975ba2305612c9575e5c8ce221edecf2d49da2236fc28b00d8f424a251765b935d8acce7bf40a1557d9fc79ba446250e786

  • C:\Users\Admin\AppData\Local\c20adb6b-2c8d-4722-859a-4f09719dbbc7\41987b4c88213f610dfb980e25f64ef08b05d1d1445e281e34120037fa888a21.exe

    Filesize

    762KB

    MD5

    f1db9cd4c0474063f5b155e455208790

    SHA1

    cf51f69e65ad53e03a85244e0b3e2aafb395d378

    SHA256

    41987b4c88213f610dfb980e25f64ef08b05d1d1445e281e34120037fa888a21

    SHA512

    e4b9c9bb63de175dbbf9f48041f19961deda356153bc1add007d1b89b2375d800eb6083ba426719149fc5185c9a4c419343fb6f5f2d82020b614b2e9645a24b7

  • memory/224-161-0x0000000000400000-0x00000000004AA000-memory.dmp

    Filesize

    680KB

  • memory/224-160-0x0000000000400000-0x00000000004AA000-memory.dmp

    Filesize

    680KB

  • memory/224-157-0x0000000000400000-0x00000000004AA000-memory.dmp

    Filesize

    680KB

  • memory/224-155-0x0000000000400000-0x00000000004AA000-memory.dmp

    Filesize

    680KB

  • memory/224-154-0x0000000000000000-mapping.dmp

  • memory/864-150-0x0000000000000000-mapping.dmp

  • memory/864-159-0x0000000002160000-0x0000000002208000-memory.dmp

    Filesize

    672KB

  • memory/864-158-0x00000000006DD000-0x0000000000745000-memory.dmp

    Filesize

    416KB

  • memory/864-153-0x00000000006DD000-0x0000000000745000-memory.dmp

    Filesize

    416KB

  • memory/2448-134-0x00000000020F8000-0x000000000218A000-memory.dmp

    Filesize

    584KB

  • memory/2448-135-0x0000000002190000-0x00000000022AB000-memory.dmp

    Filesize

    1.1MB

  • memory/2768-137-0x0000000000000000-mapping.dmp

  • memory/2996-143-0x0000000000643000-0x00000000006D5000-memory.dmp

    Filesize

    584KB

  • memory/2996-139-0x0000000000000000-mapping.dmp

  • memory/3100-130-0x0000000000000000-mapping.dmp

  • memory/3100-136-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3100-133-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3100-132-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3100-131-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4332-140-0x0000000000000000-mapping.dmp

  • memory/4332-149-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4332-144-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4332-142-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB