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Analysis

  • max time kernel
    189s
  • max time network
    304s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    20/09/2022, 14:12

General

  • Target

    94ba7f1f2e36466f459f6634a11f2c7e1fb06c08c0017b498c663f0c0a6b2037.exe

  • Size

    718KB

  • MD5

    91782e054035e7d713498eb439be8f8c

  • SHA1

    2569123bd92b61d3ff85d105e0fd72a3d745b52f

  • SHA256

    94ba7f1f2e36466f459f6634a11f2c7e1fb06c08c0017b498c663f0c0a6b2037

  • SHA512

    493516938a8a8f6e45ab7d639b22b5dbc8d476437013bacaaf02cf71d1b0d46983e7660da6894b1f771e4ba4ee45911e10cd48a7b9929df340a1e10a9228aec4

  • SSDEEP

    12288:X3crEJjddKupYOxZGDh0zKneHwO+Udlx0sb4LVUnEPJ7hwiVKeaFc:X/VpYOyDQKRA0sEmc7BYe

Malware Config

Extracted

Family

djvu

C2

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

Attributes
  • extension

    .mmpu

  • offline_id

    yd6oYv6aBN90yFzTWdZ34sXSXtXiauzOLXZyWht1

  • 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-xuPJqoyzQE 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: 0554Jhyjd

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 4 IoCs
  • Modifies file permissions 1 TTPs 1 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • 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.

  • Creates scheduled task(s) 1 TTPs 2 IoCs

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

  • Modifies system certificate store 2 TTPs 5 IoCs
  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Suspicious use of WriteProcessMemory 60 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\94ba7f1f2e36466f459f6634a11f2c7e1fb06c08c0017b498c663f0c0a6b2037.exe
    "C:\Users\Admin\AppData\Local\Temp\94ba7f1f2e36466f459f6634a11f2c7e1fb06c08c0017b498c663f0c0a6b2037.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:360
    • C:\Users\Admin\AppData\Local\Temp\94ba7f1f2e36466f459f6634a11f2c7e1fb06c08c0017b498c663f0c0a6b2037.exe
      "C:\Users\Admin\AppData\Local\Temp\94ba7f1f2e36466f459f6634a11f2c7e1fb06c08c0017b498c663f0c0a6b2037.exe"
      2⤵
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:288
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\ad9db91f-a453-4215-a71d-0271a1f95833" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:1116
      • C:\Users\Admin\AppData\Local\Temp\94ba7f1f2e36466f459f6634a11f2c7e1fb06c08c0017b498c663f0c0a6b2037.exe
        "C:\Users\Admin\AppData\Local\Temp\94ba7f1f2e36466f459f6634a11f2c7e1fb06c08c0017b498c663f0c0a6b2037.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1984
        • C:\Users\Admin\AppData\Local\Temp\94ba7f1f2e36466f459f6634a11f2c7e1fb06c08c0017b498c663f0c0a6b2037.exe
          "C:\Users\Admin\AppData\Local\Temp\94ba7f1f2e36466f459f6634a11f2c7e1fb06c08c0017b498c663f0c0a6b2037.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Loads dropped DLL
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:1260
          • C:\Users\Admin\AppData\Local\1323a180-78ab-4785-a045-caabbdf5471c\build2.exe
            "C:\Users\Admin\AppData\Local\1323a180-78ab-4785-a045-caabbdf5471c\build2.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious use of WriteProcessMemory
            PID:1992
            • C:\Users\Admin\AppData\Local\1323a180-78ab-4785-a045-caabbdf5471c\build2.exe
              "C:\Users\Admin\AppData\Local\1323a180-78ab-4785-a045-caabbdf5471c\build2.exe"
              6⤵
              • Executes dropped EXE
              • Modifies system certificate store
              PID:564
          • C:\Users\Admin\AppData\Local\1323a180-78ab-4785-a045-caabbdf5471c\build3.exe
            "C:\Users\Admin\AppData\Local\1323a180-78ab-4785-a045-caabbdf5471c\build3.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of WriteProcessMemory
            PID:1624
            • 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:1532
  • C:\Windows\system32\taskeng.exe
    taskeng.exe {2CC3271A-EE28-4DEC-BC86-4DD1129FEF39} S-1-5-21-2292972927-2705560509-2768824231-1000:GRXNNIIE\Admin:Interactive:[1]
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1088
    • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      2⤵
      • Executes dropped EXE
      • Suspicious use of WriteProcessMemory
      PID:780
      • 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:1584

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\1323a180-78ab-4785-a045-caabbdf5471c\build2.exe

    Filesize

    246KB

    MD5

    4e08ecaa075b90f30327bf200d23130b

    SHA1

    f7b67a7abbe3815bd758933f7c4712bd4d4ec4b2

    SHA256

    6c11af0bbd346329224255d38a07fb9db5828881d3520ab4623c7a5fc09ecd47

    SHA512

    e7deeafe000b034cd4d71776cd1285e33d295a830f3459506dd7332e8c1c61b43ec2fdc406c22ba5262aa62a795421492f7e54602bfe08102b8b2a000d150bb7

  • C:\Users\Admin\AppData\Local\1323a180-78ab-4785-a045-caabbdf5471c\build2.exe

    Filesize

    246KB

    MD5

    4e08ecaa075b90f30327bf200d23130b

    SHA1

    f7b67a7abbe3815bd758933f7c4712bd4d4ec4b2

    SHA256

    6c11af0bbd346329224255d38a07fb9db5828881d3520ab4623c7a5fc09ecd47

    SHA512

    e7deeafe000b034cd4d71776cd1285e33d295a830f3459506dd7332e8c1c61b43ec2fdc406c22ba5262aa62a795421492f7e54602bfe08102b8b2a000d150bb7

  • C:\Users\Admin\AppData\Local\1323a180-78ab-4785-a045-caabbdf5471c\build2.exe

    Filesize

    246KB

    MD5

    4e08ecaa075b90f30327bf200d23130b

    SHA1

    f7b67a7abbe3815bd758933f7c4712bd4d4ec4b2

    SHA256

    6c11af0bbd346329224255d38a07fb9db5828881d3520ab4623c7a5fc09ecd47

    SHA512

    e7deeafe000b034cd4d71776cd1285e33d295a830f3459506dd7332e8c1c61b43ec2fdc406c22ba5262aa62a795421492f7e54602bfe08102b8b2a000d150bb7

  • C:\Users\Admin\AppData\Local\1323a180-78ab-4785-a045-caabbdf5471c\build3.exe

    Filesize

    9KB

    MD5

    9ead10c08e72ae41921191f8db39bc16

    SHA1

    abe3bce01cd34afc88e2c838173f8c2bd0090ae1

    SHA256

    8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0

    SHA512

    aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a

  • C:\Users\Admin\AppData\Local\1323a180-78ab-4785-a045-caabbdf5471c\build3.exe

    Filesize

    9KB

    MD5

    9ead10c08e72ae41921191f8db39bc16

    SHA1

    abe3bce01cd34afc88e2c838173f8c2bd0090ae1

    SHA256

    8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0

    SHA512

    aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a

  • C:\Users\Admin\AppData\Local\ad9db91f-a453-4215-a71d-0271a1f95833\94ba7f1f2e36466f459f6634a11f2c7e1fb06c08c0017b498c663f0c0a6b2037.exe

    Filesize

    718KB

    MD5

    91782e054035e7d713498eb439be8f8c

    SHA1

    2569123bd92b61d3ff85d105e0fd72a3d745b52f

    SHA256

    94ba7f1f2e36466f459f6634a11f2c7e1fb06c08c0017b498c663f0c0a6b2037

    SHA512

    493516938a8a8f6e45ab7d639b22b5dbc8d476437013bacaaf02cf71d1b0d46983e7660da6894b1f771e4ba4ee45911e10cd48a7b9929df340a1e10a9228aec4

  • 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

  • \Users\Admin\AppData\Local\1323a180-78ab-4785-a045-caabbdf5471c\build2.exe

    Filesize

    246KB

    MD5

    4e08ecaa075b90f30327bf200d23130b

    SHA1

    f7b67a7abbe3815bd758933f7c4712bd4d4ec4b2

    SHA256

    6c11af0bbd346329224255d38a07fb9db5828881d3520ab4623c7a5fc09ecd47

    SHA512

    e7deeafe000b034cd4d71776cd1285e33d295a830f3459506dd7332e8c1c61b43ec2fdc406c22ba5262aa62a795421492f7e54602bfe08102b8b2a000d150bb7

  • \Users\Admin\AppData\Local\1323a180-78ab-4785-a045-caabbdf5471c\build2.exe

    Filesize

    246KB

    MD5

    4e08ecaa075b90f30327bf200d23130b

    SHA1

    f7b67a7abbe3815bd758933f7c4712bd4d4ec4b2

    SHA256

    6c11af0bbd346329224255d38a07fb9db5828881d3520ab4623c7a5fc09ecd47

    SHA512

    e7deeafe000b034cd4d71776cd1285e33d295a830f3459506dd7332e8c1c61b43ec2fdc406c22ba5262aa62a795421492f7e54602bfe08102b8b2a000d150bb7

  • \Users\Admin\AppData\Local\1323a180-78ab-4785-a045-caabbdf5471c\build3.exe

    Filesize

    9KB

    MD5

    9ead10c08e72ae41921191f8db39bc16

    SHA1

    abe3bce01cd34afc88e2c838173f8c2bd0090ae1

    SHA256

    8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0

    SHA512

    aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a

  • \Users\Admin\AppData\Local\1323a180-78ab-4785-a045-caabbdf5471c\build3.exe

    Filesize

    9KB

    MD5

    9ead10c08e72ae41921191f8db39bc16

    SHA1

    abe3bce01cd34afc88e2c838173f8c2bd0090ae1

    SHA256

    8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0

    SHA512

    aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a

  • memory/288-61-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/288-55-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/288-62-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/288-67-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/288-60-0x0000000075771000-0x0000000075773000-memory.dmp

    Filesize

    8KB

  • memory/360-59-0x0000000004510000-0x000000000462B000-memory.dmp

    Filesize

    1.1MB

  • memory/360-54-0x00000000002E0000-0x0000000000371000-memory.dmp

    Filesize

    580KB

  • memory/360-58-0x00000000002E0000-0x0000000000371000-memory.dmp

    Filesize

    580KB

  • memory/564-88-0x0000000000400000-0x000000000045B000-memory.dmp

    Filesize

    364KB

  • memory/564-87-0x0000000000400000-0x000000000045B000-memory.dmp

    Filesize

    364KB

  • memory/564-80-0x0000000000400000-0x000000000045B000-memory.dmp

    Filesize

    364KB

  • memory/1260-74-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1260-73-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1984-70-0x0000000000220000-0x00000000002B1000-memory.dmp

    Filesize

    580KB

  • memory/1984-66-0x0000000000220000-0x00000000002B1000-memory.dmp

    Filesize

    580KB

  • memory/1992-84-0x00000000002EB000-0x0000000000315000-memory.dmp

    Filesize

    168KB

  • memory/1992-86-0x00000000001B0000-0x00000000001F7000-memory.dmp

    Filesize

    284KB