Analysis

  • max time kernel
    152s
  • max time network
    147s
  • platform
    windows7_x64
  • resource
    win7-en-20211208
  • submitted
    13/12/2021, 15:18

General

  • Target

    CUSTOMS DOCUMENTS PDF.jar

  • Size

    95KB

  • MD5

    91f2de012a840b47d9d11d1507ca14be

  • SHA1

    79b813a33705605527483ead1aea2537c198e571

  • SHA256

    abacf97d6fd2b2c59717692c05fb25a5a9295aea2908b76324531e5e9fdc4311

  • SHA512

    46560661273593e550ce587b0c1d0effeb5cc21e04c920a6e9aff16ebcb4e93bc9785376015cb6496c0e452d478e25b62ad5f8912f62adc0d0f4f318e6b30506

Malware Config

Signatures

  • STRRAT

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

  • Drops startup file 1 IoCs
  • Loads dropped DLL 2 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • Looks up external IP address via web service 1 IoCs

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

  • 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 AdjustPrivilegeToken 64 IoCs
  • Suspicious use of WriteProcessMemory 36 IoCs

Processes

  • C:\Windows\system32\java.exe
    java -jar "C:\Users\Admin\AppData\Local\Temp\CUSTOMS DOCUMENTS PDF.jar"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:968
    • C:\Program Files\Java\jre7\bin\java.exe
      "C:\Program Files\Java\jre7\bin\java.exe" -jar "C:\Users\Admin\CUSTOMS DOCUMENTS PDF.jar"
      2⤵
      • Drops startup file
      • Loads dropped DLL
      • Adds Run key to start application
      • Suspicious use of WriteProcessMemory
      PID:1476
      • C:\Windows\system32\cmd.exe
        cmd /c schtasks /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Roaming\CUSTOMS DOCUMENTS PDF.jar"
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1296
        • C:\Windows\system32\schtasks.exe
          schtasks /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Roaming\CUSTOMS DOCUMENTS PDF.jar"
          4⤵
          • Creates scheduled task(s)
          PID:276
      • C:\Program Files\Java\jre7\bin\java.exe
        "C:\Program Files\Java\jre7\bin\java.exe" -jar "C:\Users\Admin\AppData\Roaming\CUSTOMS DOCUMENTS PDF.jar"
        3⤵
        • Loads dropped DLL
        • Suspicious use of WriteProcessMemory
        PID:316
        • C:\Windows\system32\cmd.exe
          cmd.exe /c "wmic /node:. /namespace:'\\root\cimv2' path win32_logicaldisk get volumeserialnumber /format:list"
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:1520
          • C:\Windows\System32\Wbem\WMIC.exe
            wmic /node:. /namespace:'\\root\cimv2' path win32_logicaldisk get volumeserialnumber /format:list
            5⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:1588
        • C:\Windows\system32\cmd.exe
          cmd.exe /c "wmic /node:. /namespace:'\\root\cimv2' path win32_operatingsystem get caption,OSArchitecture /format:list"
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:1976
          • C:\Windows\System32\Wbem\WMIC.exe
            wmic /node:. /namespace:'\\root\cimv2' path win32_operatingsystem get caption,OSArchitecture /format:list
            5⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:1416
        • C:\Windows\system32\cmd.exe
          cmd.exe /c "wmic /node:. /namespace:'\\root\cimv2' path win32_operatingsystem get version /format:list"
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:1608
          • C:\Windows\System32\Wbem\WMIC.exe
            wmic /node:. /namespace:'\\root\cimv2' path win32_operatingsystem get version /format:list
            5⤵
              PID:1676
          • C:\Windows\system32\cmd.exe
            cmd.exe /c "wmic /node:localhost /namespace:'\\root\securitycenter' path antivirusproduct get displayname /format:list"
            4⤵
            • Suspicious use of WriteProcessMemory
            PID:1984
            • C:\Windows\System32\Wbem\WMIC.exe
              wmic /node:localhost /namespace:'\\root\securitycenter' path antivirusproduct get displayname /format:list
              5⤵
                PID:1948

      Network

            MITRE ATT&CK Enterprise v6

            Replay Monitor

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            Downloads

            • memory/316-127-0x0000000000320000-0x0000000000321000-memory.dmp

              Filesize

              4KB

            • memory/316-118-0x0000000002270000-0x00000000024E0000-memory.dmp

              Filesize

              2.4MB

            • memory/316-119-0x0000000000320000-0x0000000000321000-memory.dmp

              Filesize

              4KB

            • memory/968-66-0x0000000000230000-0x0000000000231000-memory.dmp

              Filesize

              4KB

            • memory/968-55-0x0000000002090000-0x0000000002300000-memory.dmp

              Filesize

              2.4MB

            • memory/968-87-0x0000000000230000-0x0000000000231000-memory.dmp

              Filesize

              4KB

            • memory/968-86-0x0000000000230000-0x0000000000231000-memory.dmp

              Filesize

              4KB

            • memory/968-85-0x0000000000230000-0x0000000000231000-memory.dmp

              Filesize

              4KB

            • memory/968-54-0x000007FEFB571000-0x000007FEFB573000-memory.dmp

              Filesize

              8KB

            • memory/968-83-0x0000000000230000-0x0000000000231000-memory.dmp

              Filesize

              4KB

            • memory/968-57-0x0000000000230000-0x0000000000231000-memory.dmp

              Filesize

              4KB

            • memory/968-88-0x0000000000230000-0x0000000000231000-memory.dmp

              Filesize

              4KB

            • memory/968-56-0x0000000002090000-0x0000000002300000-memory.dmp

              Filesize

              2.4MB

            • memory/968-58-0x0000000000230000-0x0000000000231000-memory.dmp

              Filesize

              4KB

            • memory/968-91-0x0000000000230000-0x0000000000231000-memory.dmp

              Filesize

              4KB

            • memory/968-90-0x0000000000230000-0x0000000000231000-memory.dmp

              Filesize

              4KB

            • memory/968-89-0x0000000000230000-0x0000000000231000-memory.dmp

              Filesize

              4KB

            • memory/968-93-0x0000000000230000-0x0000000000231000-memory.dmp

              Filesize

              4KB

            • memory/968-63-0x0000000000230000-0x0000000000231000-memory.dmp

              Filesize

              4KB

            • memory/1476-98-0x0000000000230000-0x0000000000231000-memory.dmp

              Filesize

              4KB

            • memory/1476-115-0x0000000000230000-0x0000000000231000-memory.dmp

              Filesize

              4KB

            • memory/1476-107-0x0000000000230000-0x0000000000231000-memory.dmp

              Filesize

              4KB

            • memory/1476-97-0x0000000002160000-0x00000000023D0000-memory.dmp

              Filesize

              2.4MB