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Analysis

  • max time kernel
    85s
  • max time network
    166s
  • platform
    windows7_x64
  • resource
    win7-20220901-en
  • resource tags

    arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system
  • submitted
    20/09/2022, 14:05

General

  • Target

    3d709c645802d085547621ad6756cf4768a1d1a0a2ed0d0bd816ed1ced31f877.exe

  • Size

    852KB

  • MD5

    e791bb4bb97903c8bc6852d3de7632f8

  • SHA1

    a7aefd96ea7eefc54fbf559176abcac4d0d88833

  • SHA256

    3d709c645802d085547621ad6756cf4768a1d1a0a2ed0d0bd816ed1ced31f877

  • SHA512

    30f040b16c16b3ea45073238baddbc8569e1bcc2bfdce9dbb0d67d893665f11315b8868c68d6644d2974ba20fbd8963b0d0c7de9f0619d9afb5f708bb8acf141

  • SSDEEP

    24576:P7jcgVBMe/o0FL9BmsLAUhoQyZ0ctUbyRfV3xH2LtS:P7jcgV6+YUaectUbs9352g

Malware Config

Extracted

Family

djvu

C2

http://acacaca.org/test3/get.php

Attributes
  • extension

    .oovb

  • offline_id

    6GXhR4uyHH9NXT2qot14T0HeNSviNKH0Q6PGVNt1

  • payload_url

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

    http://acacaca.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-6g0MALAb7E 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: 0552Jhyjd

rsa_pubkey.plain

Signatures

  • Detected Djvu ransomware 9 IoCs
  • Djvu Ransomware

    Ransomware which is a variant of the STOP family.

  • Downloads MZ/PE file
  • Executes dropped EXE 4 IoCs
  • Loads dropped DLL 6 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.

  • Creates scheduled task(s) 1 TTPs 2 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Delays execution with timeout.exe 1 IoCs
  • Kills process with taskkill 1 IoCs
  • Modifies system certificate store 2 TTPs 9 IoCs
  • Suspicious behavior: EnumeratesProcesses 5 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\3d709c645802d085547621ad6756cf4768a1d1a0a2ed0d0bd816ed1ced31f877.exe
    "C:\Users\Admin\AppData\Local\Temp\3d709c645802d085547621ad6756cf4768a1d1a0a2ed0d0bd816ed1ced31f877.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1380
    • C:\Users\Admin\AppData\Local\Temp\3d709c645802d085547621ad6756cf4768a1d1a0a2ed0d0bd816ed1ced31f877.exe
      "C:\Users\Admin\AppData\Local\Temp\3d709c645802d085547621ad6756cf4768a1d1a0a2ed0d0bd816ed1ced31f877.exe"
      2⤵
      • Adds Run key to start application
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:2044
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\0c828cad-11c9-44c9-93d8-b966f4ac2e22" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:1936
      • C:\Users\Admin\AppData\Local\Temp\3d709c645802d085547621ad6756cf4768a1d1a0a2ed0d0bd816ed1ced31f877.exe
        "C:\Users\Admin\AppData\Local\Temp\3d709c645802d085547621ad6756cf4768a1d1a0a2ed0d0bd816ed1ced31f877.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1212
        • C:\Users\Admin\AppData\Local\Temp\3d709c645802d085547621ad6756cf4768a1d1a0a2ed0d0bd816ed1ced31f877.exe
          "C:\Users\Admin\AppData\Local\Temp\3d709c645802d085547621ad6756cf4768a1d1a0a2ed0d0bd816ed1ced31f877.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Loads dropped DLL
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:1072
          • C:\Users\Admin\AppData\Local\0b51e21a-1691-4442-b42d-41d1b4c39900\build2.exe
            "C:\Users\Admin\AppData\Local\0b51e21a-1691-4442-b42d-41d1b4c39900\build2.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious use of WriteProcessMemory
            PID:1260
            • C:\Users\Admin\AppData\Local\0b51e21a-1691-4442-b42d-41d1b4c39900\build2.exe
              "C:\Users\Admin\AppData\Local\0b51e21a-1691-4442-b42d-41d1b4c39900\build2.exe"
              6⤵
              • Executes dropped EXE
              • Loads dropped DLL
              • Checks processor information in registry
              • Modifies system certificate store
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of WriteProcessMemory
              PID:1092
              • C:\Windows\SysWOW64\cmd.exe
                "C:\Windows\System32\cmd.exe" รท/c taskkill /im build2.exe /f & timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\0b51e21a-1691-4442-b42d-41d1b4c39900\build2.exe" & del C:\PrograData\*.dll & exit
                7⤵
                • Suspicious use of WriteProcessMemory
                PID:1532
                • C:\Windows\SysWOW64\taskkill.exe
                  taskkill /im build2.exe /f
                  8⤵
                  • Kills process with taskkill
                  • Suspicious use of AdjustPrivilegeToken
                  PID:524
                • C:\Windows\SysWOW64\timeout.exe
                  timeout /t 6
                  8⤵
                  • Delays execution with timeout.exe
                  PID:828
          • C:\Users\Admin\AppData\Local\0b51e21a-1691-4442-b42d-41d1b4c39900\build3.exe
            "C:\Users\Admin\AppData\Local\0b51e21a-1691-4442-b42d-41d1b4c39900\build3.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of WriteProcessMemory
            PID:1172
            • C:\Windows\SysWOW64\schtasks.exe
              /C /create /F /sc minute /mo 1 /tn "Azure-Update-Task" /tr "C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe"
              6⤵
              • Creates scheduled task(s)
              PID:1624
  • C:\Windows\system32\taskeng.exe
    taskeng.exe {7458683C-B5EE-4141-9E9B-9EF9BA0A5B9E} S-1-5-21-4063495947-34355257-727531523-1000:RYNKSFQE\Admin:Interactive:[1]
    1⤵
      PID:1988
      • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
        C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
        2⤵
        • Executes dropped EXE
        PID:1896
        • C:\Windows\SysWOW64\schtasks.exe
          /C /create /F /sc minute /mo 1 /tn "Azure-Update-Task" /tr "C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe"
          3⤵
          • Creates scheduled task(s)
          PID:1160

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

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    Downloads

    • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015

      Filesize

      344B

      MD5

      baecb3f4a4af4b0fc8ba75829588b65e

      SHA1

      12408fdc494ab5ac1e84ff58bf130be014be8d61

      SHA256

      1eda52365b8ab5bd92592eee2411c2616b4782f9c738a67640e8913e2b5c9890

      SHA512

      ec22629093fdf5c73ea2d513255ebf03c85502bcd49329c79df977886a4e66e9c8ec15a0b85e4af8eb7dae440e1a3d955c1de08edb2c0ba79743e1ae4058ca9c

    • C:\Users\Admin\AppData\Local\0b51e21a-1691-4442-b42d-41d1b4c39900\build2.exe

      Filesize

      246KB

      MD5

      4e08ecaa075b90f30327bf200d23130b

      SHA1

      f7b67a7abbe3815bd758933f7c4712bd4d4ec4b2

      SHA256

      6c11af0bbd346329224255d38a07fb9db5828881d3520ab4623c7a5fc09ecd47

      SHA512

      e7deeafe000b034cd4d71776cd1285e33d295a830f3459506dd7332e8c1c61b43ec2fdc406c22ba5262aa62a795421492f7e54602bfe08102b8b2a000d150bb7

    • C:\Users\Admin\AppData\Local\0b51e21a-1691-4442-b42d-41d1b4c39900\build2.exe

      Filesize

      246KB

      MD5

      4e08ecaa075b90f30327bf200d23130b

      SHA1

      f7b67a7abbe3815bd758933f7c4712bd4d4ec4b2

      SHA256

      6c11af0bbd346329224255d38a07fb9db5828881d3520ab4623c7a5fc09ecd47

      SHA512

      e7deeafe000b034cd4d71776cd1285e33d295a830f3459506dd7332e8c1c61b43ec2fdc406c22ba5262aa62a795421492f7e54602bfe08102b8b2a000d150bb7

    • C:\Users\Admin\AppData\Local\0b51e21a-1691-4442-b42d-41d1b4c39900\build2.exe

      Filesize

      246KB

      MD5

      4e08ecaa075b90f30327bf200d23130b

      SHA1

      f7b67a7abbe3815bd758933f7c4712bd4d4ec4b2

      SHA256

      6c11af0bbd346329224255d38a07fb9db5828881d3520ab4623c7a5fc09ecd47

      SHA512

      e7deeafe000b034cd4d71776cd1285e33d295a830f3459506dd7332e8c1c61b43ec2fdc406c22ba5262aa62a795421492f7e54602bfe08102b8b2a000d150bb7

    • C:\Users\Admin\AppData\Local\0b51e21a-1691-4442-b42d-41d1b4c39900\build3.exe

      Filesize

      9KB

      MD5

      9ead10c08e72ae41921191f8db39bc16

      SHA1

      abe3bce01cd34afc88e2c838173f8c2bd0090ae1

      SHA256

      8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0

      SHA512

      aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a

    • C:\Users\Admin\AppData\Local\0b51e21a-1691-4442-b42d-41d1b4c39900\build3.exe

      Filesize

      9KB

      MD5

      9ead10c08e72ae41921191f8db39bc16

      SHA1

      abe3bce01cd34afc88e2c838173f8c2bd0090ae1

      SHA256

      8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0

      SHA512

      aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a

    • C:\Users\Admin\AppData\Local\0c828cad-11c9-44c9-93d8-b966f4ac2e22\3d709c645802d085547621ad6756cf4768a1d1a0a2ed0d0bd816ed1ced31f877.exe

      Filesize

      852KB

      MD5

      e791bb4bb97903c8bc6852d3de7632f8

      SHA1

      a7aefd96ea7eefc54fbf559176abcac4d0d88833

      SHA256

      3d709c645802d085547621ad6756cf4768a1d1a0a2ed0d0bd816ed1ced31f877

      SHA512

      30f040b16c16b3ea45073238baddbc8569e1bcc2bfdce9dbb0d67d893665f11315b8868c68d6644d2974ba20fbd8963b0d0c7de9f0619d9afb5f708bb8acf141

    • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe

      Filesize

      9KB

      MD5

      9ead10c08e72ae41921191f8db39bc16

      SHA1

      abe3bce01cd34afc88e2c838173f8c2bd0090ae1

      SHA256

      8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0

      SHA512

      aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a

    • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe

      Filesize

      9KB

      MD5

      9ead10c08e72ae41921191f8db39bc16

      SHA1

      abe3bce01cd34afc88e2c838173f8c2bd0090ae1

      SHA256

      8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0

      SHA512

      aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a

    • \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

    • \Users\Admin\AppData\Local\0b51e21a-1691-4442-b42d-41d1b4c39900\build2.exe

      Filesize

      246KB

      MD5

      4e08ecaa075b90f30327bf200d23130b

      SHA1

      f7b67a7abbe3815bd758933f7c4712bd4d4ec4b2

      SHA256

      6c11af0bbd346329224255d38a07fb9db5828881d3520ab4623c7a5fc09ecd47

      SHA512

      e7deeafe000b034cd4d71776cd1285e33d295a830f3459506dd7332e8c1c61b43ec2fdc406c22ba5262aa62a795421492f7e54602bfe08102b8b2a000d150bb7

    • \Users\Admin\AppData\Local\0b51e21a-1691-4442-b42d-41d1b4c39900\build2.exe

      Filesize

      246KB

      MD5

      4e08ecaa075b90f30327bf200d23130b

      SHA1

      f7b67a7abbe3815bd758933f7c4712bd4d4ec4b2

      SHA256

      6c11af0bbd346329224255d38a07fb9db5828881d3520ab4623c7a5fc09ecd47

      SHA512

      e7deeafe000b034cd4d71776cd1285e33d295a830f3459506dd7332e8c1c61b43ec2fdc406c22ba5262aa62a795421492f7e54602bfe08102b8b2a000d150bb7

    • \Users\Admin\AppData\Local\0b51e21a-1691-4442-b42d-41d1b4c39900\build3.exe

      Filesize

      9KB

      MD5

      9ead10c08e72ae41921191f8db39bc16

      SHA1

      abe3bce01cd34afc88e2c838173f8c2bd0090ae1

      SHA256

      8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0

      SHA512

      aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a

    • \Users\Admin\AppData\Local\0b51e21a-1691-4442-b42d-41d1b4c39900\build3.exe

      Filesize

      9KB

      MD5

      9ead10c08e72ae41921191f8db39bc16

      SHA1

      abe3bce01cd34afc88e2c838173f8c2bd0090ae1

      SHA256

      8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0

      SHA512

      aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a

    • memory/1072-73-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/1072-74-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/1092-80-0x0000000000400000-0x000000000045B000-memory.dmp

      Filesize

      364KB

    • memory/1092-118-0x0000000000400000-0x000000000045B000-memory.dmp

      Filesize

      364KB

    • memory/1092-97-0x0000000061E00000-0x0000000061EF3000-memory.dmp

      Filesize

      972KB

    • memory/1092-87-0x0000000000400000-0x000000000045B000-memory.dmp

      Filesize

      364KB

    • memory/1092-96-0x0000000000400000-0x000000000045B000-memory.dmp

      Filesize

      364KB

    • memory/1212-71-0x0000000000220000-0x00000000002B2000-memory.dmp

      Filesize

      584KB

    • memory/1212-66-0x0000000000220000-0x00000000002B2000-memory.dmp

      Filesize

      584KB

    • memory/1260-85-0x00000000001B0000-0x00000000001F7000-memory.dmp

      Filesize

      284KB

    • memory/1260-84-0x00000000002EB000-0x0000000000315000-memory.dmp

      Filesize

      168KB

    • memory/1380-59-0x0000000004520000-0x000000000463B000-memory.dmp

      Filesize

      1.1MB

    • memory/1380-54-0x0000000000310000-0x00000000003A2000-memory.dmp

      Filesize

      584KB

    • memory/1380-57-0x0000000000310000-0x00000000003A2000-memory.dmp

      Filesize

      584KB

    • memory/2044-67-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/2044-62-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/2044-61-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/2044-60-0x0000000075A11000-0x0000000075A13000-memory.dmp

      Filesize

      8KB

    • memory/2044-55-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB