Analysis

  • max time kernel
    1s
  • max time network
    154s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240709-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
  • submitted
    25/07/2024, 17:26

General

  • Target
    232d25948db02a80f05a71382a8fda0000fb08df82778f30322d5844ce7d167b.exe
  • Size 834KB
  • Sample240725-vz2faatfjp
  • SHA256 232d25948db02a80f05a71382a8fda0000fb08df82778f30322d5844ce7d167b
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • djvu

C2
  • http://fuyt.org/test1/get.php

Attributes
  • extension

    .iiof

  • offline_id

    rpx4UUTYZiAR5omq187UvM233jloVHyJUkA8s3t1

  • 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-hsmBOFHh66 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: 0410Jsfkjn

rsa_pubkey.plain

Signatures

  • Detected Djvu ransomware 18 IoCs
  • Djvu Ransomware

    Ransomware which is a variant of the STOP family.

  • ASPack v2.12-2.42 1 IoCs

    Detects executables packed with ASPack v2.12-2.42

  • Executes dropped EXE 1 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 3 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Suspicious use of SetThreadContext 1 IoCs
  • Drops file in Program Files directory 64 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 4 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of WriteProcessMemory 16 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\232d25948db02a80f05a71382a8fda0000fb08df82778f30322d5844ce7d167b.exe
    "C:\Users\Admin\AppData\Local\Temp\232d25948db02a80f05a71382a8fda0000fb08df82778f30322d5844ce7d167b.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4532
    • C:\Users\Admin\AppData\Local\Temp\XrmUTb.exe
      C:\Users\Admin\AppData\Local\Temp\XrmUTb.exe
      2⤵
      • Executes dropped EXE
      • Drops file in Program Files directory
      • System Location Discovery: System Language Discovery
      PID:1108
      • C:\Windows\SysWOW64\cmd.exe
        C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\438119a0.bat" "
        3⤵
          PID:4396
      • C:\Users\Admin\AppData\Local\Temp\232d25948db02a80f05a71382a8fda0000fb08df82778f30322d5844ce7d167b.exe
        "C:\Users\Admin\AppData\Local\Temp\232d25948db02a80f05a71382a8fda0000fb08df82778f30322d5844ce7d167b.exe"
        2⤵
        • Adds Run key to start application
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of WriteProcessMemory
        PID:4984
        • C:\Windows\SysWOW64\icacls.exe
          icacls "C:\Users\Admin\AppData\Local\6e2b7937-2ac4-42d6-95da-7f0fc6cdcc55" /deny *S-1-1-0:(OI)(CI)(DE,DC)
          3⤵
          • Modifies file permissions
          • System Location Discovery: System Language Discovery
          PID:2896
        • C:\Users\Admin\AppData\Local\Temp\232d25948db02a80f05a71382a8fda0000fb08df82778f30322d5844ce7d167b.exe
          "C:\Users\Admin\AppData\Local\Temp\232d25948db02a80f05a71382a8fda0000fb08df82778f30322d5844ce7d167b.exe" --Admin IsNotAutoStart IsNotTask
          3⤵
            PID:2212
            • C:\Users\Admin\AppData\Local\Temp\232d25948db02a80f05a71382a8fda0000fb08df82778f30322d5844ce7d167b.exe
              "C:\Users\Admin\AppData\Local\Temp\232d25948db02a80f05a71382a8fda0000fb08df82778f30322d5844ce7d167b.exe" --Admin IsNotAutoStart IsNotTask
              4⤵
                PID:2296

        Network

              MITRE ATT&CK Enterprise v15

              Replay Monitor

              Loading Replay Monitor...

              Downloads

              8B2B9A00839EED1DFDCCC3BFC2F5DF12

              • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\8B2B9A00839EED1DFDCCC3BFC2F5DF12
              • Size 1KB
              • SHA256 33a39e9ec2133230533a686ec43760026e014a3828c703707acbc150fe40fd6f
              • MD5 SHA1 SHA512

              B46811C17859FFB409CF0E904A4AA8F8

              • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B46811C17859FFB409CF0E904A4AA8F8
              • Size 436B
              • SHA256 f157ed17fcaf8837fa82f8b69973848c9b10a02636848f995698212a08f31895
              • MD5 SHA1 SHA512

              8B2B9A00839EED1DFDCCC3BFC2F5DF12

              • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\8B2B9A00839EED1DFDCCC3BFC2F5DF12
              • Size 174B
              • SHA256 12da885ab2c37a8110368e6946a5f45264d391a195941a397474fb2db9e7c058
              • MD5 SHA1 SHA512

              B46811C17859FFB409CF0E904A4AA8F8

              • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B46811C17859FFB409CF0E904A4AA8F8
              • Size 170B
              • SHA256 d2657654fb1355bef54d6ae5eba0b99f8dde0b61d85975e375d48f1d49c10fab
              • MD5 SHA1 SHA512

              232d25948db02a80f05a71382a8fda0000fb08df82778f30322d5844ce7d167b.exe

              • Path C:\Users\Admin\AppData\Local\6e2b7937-2ac4-42d6-95da-7f0fc6cdcc55\232d25948db02a80f05a71382a8fda0000fb08df82778f30322d5844ce7d167b.exe
              • Size 834KB
              • SHA256 232d25948db02a80f05a71382a8fda0000fb08df82778f30322d5844ce7d167b
              • MD5 SHA1 SHA512 SSDEEP

              k2[1].rar

              • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\IE\MDMHN06X\k2[1].rar
              • Size 4B
              • SHA256 b5bb9d8014a0f9b1d61e21e796d78dccdf1352f23cd32812f4850b878ae4944c
              • MD5 SHA1 SHA512

              438119a0.bat

              • Path C:\Users\Admin\AppData\Local\Temp\438119a0.bat
              • Size 187B
              • SHA256 47427dd942498b91b6423f216fe871f54597d14d9d95492793e95434442577bf
              • MD5 SHA1 SHA512

              687757E3.exe

              • Path C:\Users\Admin\AppData\Local\Temp\687757E3.exe
              • Size 4B
              • SHA256 9f2981a7cc4d40a2a409dc895de64253acd819d7c0011c8e80b86fe899464e31
              • MD5 SHA1 SHA512

              XrmUTb.exe

              • Path C:\Users\Admin\AppData\Local\Temp\XrmUTb.exe
              • Size 15KB
              • SHA256 4485df22c627fa0bb899d79aa6ff29bc5be1dbc3caa2b7a490809338d54b7794
              • MD5 SHA1 SHA512 SSDEEP

              memory/1108-5-0x00000000004C0000-0x00000000004C9000-memory.dmp

              memory/1108-77-0x00000000004C0000-0x00000000004C9000-memory.dmp

              memory/2212-68-0x0000000000400000-0x0000000000502000-memory.dmp

              memory/2212-47-0x0000000000400000-0x0000000000502000-memory.dmp

              memory/2212-62-0x0000000000400000-0x0000000000502000-memory.dmp

              memory/2296-65-0x0000000000400000-0x0000000000537000-memory.dmp

              memory/2296-94-0x0000000000400000-0x0000000000537000-memory.dmp

              memory/2296-99-0x0000000000400000-0x0000000000537000-memory.dmp

              memory/2296-98-0x0000000000400000-0x0000000000537000-memory.dmp

              memory/2296-64-0x0000000000400000-0x0000000000537000-memory.dmp

              memory/2296-97-0x0000000000400000-0x0000000000537000-memory.dmp

              memory/2296-80-0x0000000000400000-0x0000000000537000-memory.dmp

              memory/2296-96-0x0000000000400000-0x0000000000537000-memory.dmp

              memory/2296-78-0x0000000000400000-0x0000000000537000-memory.dmp

              memory/2296-67-0x0000000000400000-0x0000000000537000-memory.dmp

              memory/2296-85-0x0000000000400000-0x0000000000537000-memory.dmp

              memory/2296-81-0x0000000000400000-0x0000000000537000-memory.dmp

              memory/4532-7-0x00000000021F0000-0x0000000002282000-memory.dmp

              memory/4532-9-0x0000000002290000-0x00000000023AB000-memory.dmp

              memory/4532-10-0x0000000000400000-0x0000000000502000-memory.dmp

              memory/4532-1-0x0000000000400000-0x0000000000502000-memory.dmp

              memory/4984-45-0x0000000000400000-0x0000000000537000-memory.dmp

              memory/4984-12-0x0000000000400000-0x0000000000537000-memory.dmp

              memory/4984-11-0x0000000000400000-0x0000000000537000-memory.dmp

              memory/4984-13-0x0000000000400000-0x0000000000537000-memory.dmp

              memory/4984-8-0x0000000000400000-0x0000000000537000-memory.dmp