Analysis

  • max time kernel
    144s
  • max time network
    124s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    27/01/2024, 06:55

General

  • Target

    7990fa877fec785fe61a58c3c7a5ab76.exe

  • Size

    726KB

  • MD5

    7990fa877fec785fe61a58c3c7a5ab76

  • SHA1

    deb2f3da015e94c6d4ef3ae14dd2e0df801d4686

  • SHA256

    27f13dee7cc319ab79efc4a3597e33a513cbd9457ccd570db534a730448b6dfd

  • SHA512

    4b92f1c133098cfd7ad8a3610cd6d74416257e3912ceec37d8a3916a7c62861562ff9f143d31833df711f5c8dceff09c69177e1daea2f1d8511c6fe7ba6d95f1

  • SSDEEP

    12288:MkEhD8/cHIH9L7kT05u3s01AykMjc6hDgiNFjTZtvOtZfI2weRjsxZBOYti:MkEB8tLgQ5A1Ay5c6BgiNFPWtJweWxti

Malware Config

Extracted

Family

djvu

C2

http://astdg.top/fhsgtsspen6/get.php

Attributes
  • extension

    .reqg

  • offline_id

    ioYmb0jtMMtue7xjmkS3WQWGWLR8FTQhb2giQtt1

  • payload_url

    http://securebiz.org/dl/build2.exe

    http://astdg.top/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-jTbSQT8ApY 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: 0324gDrgo

rsa_pubkey.plain

Signatures

  • Detected Djvu ransomware 21 IoCs
  • Djvu Ransomware

    Ransomware which is a variant of the STOP family.

  • Renames multiple (163) files with added filename extension

    This suggests ransomware activity of encrypting all the files on the system.

  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 2 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 4 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).

  • Suspicious behavior: EnumeratesProcesses 8 IoCs
  • Suspicious use of WriteProcessMemory 36 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\7990fa877fec785fe61a58c3c7a5ab76.exe
    "C:\Users\Admin\AppData\Local\Temp\7990fa877fec785fe61a58c3c7a5ab76.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1328
    • C:\Users\Admin\AppData\Local\Temp\7990fa877fec785fe61a58c3c7a5ab76.exe
      "C:\Users\Admin\AppData\Local\Temp\7990fa877fec785fe61a58c3c7a5ab76.exe"
      2⤵
      • Checks computer location settings
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:2304
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\d00c35b7-0da9-41dd-bae0-3b1b428959ff" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:1316
      • C:\Users\Admin\AppData\Local\Temp\7990fa877fec785fe61a58c3c7a5ab76.exe
        "C:\Users\Admin\AppData\Local\Temp\7990fa877fec785fe61a58c3c7a5ab76.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2112
        • C:\Users\Admin\AppData\Local\Temp\7990fa877fec785fe61a58c3c7a5ab76.exe
          "C:\Users\Admin\AppData\Local\Temp\7990fa877fec785fe61a58c3c7a5ab76.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:3664
  • C:\Users\Admin\AppData\Local\d00c35b7-0da9-41dd-bae0-3b1b428959ff\7990fa877fec785fe61a58c3c7a5ab76.exe
    C:\Users\Admin\AppData\Local\d00c35b7-0da9-41dd-bae0-3b1b428959ff\7990fa877fec785fe61a58c3c7a5ab76.exe --Task
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:4760
    • C:\Users\Admin\AppData\Local\d00c35b7-0da9-41dd-bae0-3b1b428959ff\7990fa877fec785fe61a58c3c7a5ab76.exe
      C:\Users\Admin\AppData\Local\d00c35b7-0da9-41dd-bae0-3b1b428959ff\7990fa877fec785fe61a58c3c7a5ab76.exe --Task
      2⤵
      • Executes dropped EXE
      • Suspicious behavior: EnumeratesProcesses
      PID:4732

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

          Filesize

          1KB

          MD5

          117581c8a2ff4fce10d77d2f81dd0cdc

          SHA1

          a0fbeeef3c720485767906ddf3d699f78bd3a692

          SHA256

          14924e43f9d37b1bfca5c3d878e9ad833b26ce047840565801eb2aa2257770e2

          SHA512

          4230d5299fb961cb1d2ea3bd971e3df2cc3bdd10ff4331e672bfb4ab49a68f757df0d433dc0cfc8f07a6b6e0b51166cb571eefa93eb9a41f98197fcce5eec9a8

        • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

          Filesize

          724B

          MD5

          8202a1cd02e7d69597995cabbe881a12

          SHA1

          8858d9d934b7aa9330ee73de6c476acf19929ff6

          SHA256

          58f381c3a0a0ace6321da22e40bd44a597bd98b9c9390ab9258426b5cf75a7a5

          SHA512

          97ba9fceab995d4bef706f8deef99e06862999734ebe6a05832c710104479c6337cbf0a76e1c1e0f91566a61334dc100d837dfd049e20da765fe49def684f9c9

        • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

          Filesize

          410B

          MD5

          0e5059582cf6965707bf9e2ab3efb048

          SHA1

          3af8d3ce806f9995e406715fb23d38871562f789

          SHA256

          09171da67630cea459e7706434e9bc33701e8c05a2471ad3c415667c4f3c3f73

          SHA512

          299f051a19b8c3f1943b5c26aa90e9dc353d59e9c78b0da1f087b18219d3ca8b98e091b8f3983878c5ad4286a4fccf2d5d0e150400d7f1690e58508a174f97d1

        • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

          Filesize

          392B

          MD5

          9fdb4e6c3c1cde29d0362b275f5597b4

          SHA1

          015118fb720342f3f20e1bdd2175f228e32ccbdd

          SHA256

          ff577ca55f92e6f7b24c3e2f67077e8a0846ced58b760953b93777998fddd260

          SHA512

          8590d8a45b9a58227ce11bdd8b877edf185ad3eeaa0605cb2069ea4e703f9b4743d14d3b8013d3377157bb9c960def744209cbfef21f84403704217c4caa308f

        • C:\Users\Admin\AppData\Local\d00c35b7-0da9-41dd-bae0-3b1b428959ff\7990fa877fec785fe61a58c3c7a5ab76.exe

          Filesize

          210KB

          MD5

          94f1879a2aebc92b2c5d126e2c829a37

          SHA1

          cb251960be49d17028f5799e350fc40149b0278b

          SHA256

          dce6668e8892c49469334e94a89f8ad5f3ec3e2d6b8fcd1f4b4a078266c0a08c

          SHA512

          38e9a4a578d4e2274ad08a4c9afa03c974b2dd50da0a257a79e87bb1762e0f69921fe149166dbc5b2b6d53df0f083738546a6755e400237e1f792121b7141131

        • C:\Users\Admin\AppData\Local\d00c35b7-0da9-41dd-bae0-3b1b428959ff\7990fa877fec785fe61a58c3c7a5ab76.exe

          Filesize

          726KB

          MD5

          7990fa877fec785fe61a58c3c7a5ab76

          SHA1

          deb2f3da015e94c6d4ef3ae14dd2e0df801d4686

          SHA256

          27f13dee7cc319ab79efc4a3597e33a513cbd9457ccd570db534a730448b6dfd

          SHA512

          4b92f1c133098cfd7ad8a3610cd6d74416257e3912ceec37d8a3916a7c62861562ff9f143d31833df711f5c8dceff09c69177e1daea2f1d8511c6fe7ba6d95f1

        • memory/1328-2-0x0000000004BF0000-0x0000000004D0B000-memory.dmp

          Filesize

          1.1MB

        • memory/1328-1-0x0000000002E90000-0x0000000002F24000-memory.dmp

          Filesize

          592KB

        • memory/2112-22-0x0000000002F10000-0x0000000002FA8000-memory.dmp

          Filesize

          608KB

        • memory/2304-17-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2304-6-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2304-4-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2304-5-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2304-3-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3664-37-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3664-39-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3664-32-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3664-31-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3664-33-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3664-35-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3664-23-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3664-21-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3664-38-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3664-41-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3664-24-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4732-57-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4732-58-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4732-59-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4732-62-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4760-54-0x0000000004890000-0x0000000004927000-memory.dmp

          Filesize

          604KB