Analysis

  • max time kernel
    32s
  • max time network
    141s
  • platform
    windows7_x64
  • resource
    win7-en-20211104
  • submitted
    07/12/2021, 14:07

General

  • Target

    SHIPMENTDOCUMENTS PDF.js

  • Size

    531KB

  • MD5

    cf4ec0d22c787775c9f46dd0fe19da33

  • SHA1

    f0379f9363c0c9955d9b71064a2879fd6b1cff5c

  • SHA256

    c399dbe473150a5d2a9d3676d81971de66f2daf5360d2be26e62b5533c4fcbad

  • SHA512

    7248e804832f6eb2fb13e73af73a41a695fa131d239ce2b5aa3495858bd387053569e1d1a0e530a1e4f1a949a7c87e0995ad9443b9e2ec49d9a09889e8ccbb1f

Malware Config

Signatures

  • STRRAT

    STRRAT is a remote access tool than can steal credentials and log keystrokes.

  • Vjw0rm

    Vjw0rm is a remote access trojan written in JavaScript.

  • Blocklisted process makes network request 3 IoCs
  • Drops startup file 3 IoCs
  • Loads dropped DLL 1 IoCs
  • Adds Run key to start application 2 TTPs 2 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 1 IoCs

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

  • Suspicious use of WriteProcessMemory 9 IoCs

Processes

  • C:\Windows\system32\wscript.exe
    wscript.exe "C:\Users\Admin\AppData\Local\Temp\SHIPMENTDOCUMENTS PDF.js"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1620
    • C:\Windows\System32\WScript.exe
      "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Roaming\IwhBHZSsWd.js"
      2⤵
      • Blocklisted process makes network request
      • Drops startup file
      • Adds Run key to start application
      PID:1632
    • C:\Program Files\Java\jre7\bin\javaw.exe
      "C:\Program Files\Java\jre7\bin\javaw.exe" -jar "C:\Users\Admin\AppData\Roaming\bkoqhlyydh.txt"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:688
      • C:\Program Files\Java\jre7\bin\java.exe
        "C:\Program Files\Java\jre7\bin\java.exe" -jar "C:\Users\Admin\bkoqhlyydh.txt"
        3⤵
        • Drops startup file
        • Loads dropped DLL
        PID:1376
        • C:\Program Files\Java\jre7\bin\java.exe
          "C:\Program Files\Java\jre7\bin\java.exe" -jar "C:\Users\Admin\AppData\Roaming\bkoqhlyydh.txt"
          4⤵
            PID:1456
          • C:\Windows\system32\cmd.exe
            cmd /c schtasks /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Roaming\bkoqhlyydh.txt"
            4⤵
              PID:1280
              • C:\Windows\system32\schtasks.exe
                schtasks /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Roaming\bkoqhlyydh.txt"
                5⤵
                • Creates scheduled task(s)
                PID:1972

      Network

            MITRE ATT&CK Enterprise v6

            Replay Monitor

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            Downloads

            • memory/688-67-0x0000000000110000-0x0000000000111000-memory.dmp

              Filesize

              4KB

            • memory/688-64-0x0000000000110000-0x0000000000111000-memory.dmp

              Filesize

              4KB

            • memory/688-72-0x0000000000110000-0x0000000000111000-memory.dmp

              Filesize

              4KB

            • memory/688-73-0x0000000000110000-0x0000000000111000-memory.dmp

              Filesize

              4KB

            • memory/688-75-0x0000000000110000-0x0000000000111000-memory.dmp

              Filesize

              4KB

            • memory/688-76-0x0000000000110000-0x0000000000111000-memory.dmp

              Filesize

              4KB

            • memory/688-77-0x0000000000110000-0x0000000000111000-memory.dmp

              Filesize

              4KB

            • memory/688-79-0x0000000000110000-0x0000000000111000-memory.dmp

              Filesize

              4KB

            • memory/688-68-0x0000000000110000-0x0000000000111000-memory.dmp

              Filesize

              4KB

            • memory/688-61-0x00000000022A0000-0x0000000002510000-memory.dmp

              Filesize

              2.4MB

            • memory/688-62-0x00000000022A0000-0x0000000002510000-memory.dmp

              Filesize

              2.4MB

            • memory/688-63-0x0000000000110000-0x0000000000111000-memory.dmp

              Filesize

              4KB

            • memory/688-71-0x0000000000110000-0x0000000000111000-memory.dmp

              Filesize

              4KB

            • memory/1376-83-0x0000000000220000-0x0000000000221000-memory.dmp

              Filesize

              4KB

            • memory/1376-84-0x0000000002060000-0x00000000022D0000-memory.dmp

              Filesize

              2.4MB

            • memory/1376-93-0x0000000000220000-0x0000000000221000-memory.dmp

              Filesize

              4KB

            • memory/1376-94-0x0000000000220000-0x0000000000221000-memory.dmp

              Filesize

              4KB

            • memory/1456-99-0x0000000002200000-0x0000000002470000-memory.dmp

              Filesize

              2.4MB

            • memory/1456-100-0x0000000000230000-0x0000000000231000-memory.dmp

              Filesize

              4KB

            • memory/1620-55-0x000007FEFC141000-0x000007FEFC143000-memory.dmp

              Filesize

              8KB