Analysis

  • max time kernel
    152s
  • max time network
    147s
  • platform
    windows7_x64
  • resource
    win7-en-20211208
  • submitted
    14/12/2021, 09:03

General

  • Target

    Remittance.jar

  • Size

    95KB

  • MD5

    1884f1dd8bc296512bc4cc4fa0d1731f

  • SHA1

    7d00c02445094f044a64029a1105bedfe71c7d8d

  • SHA256

    7166e6707991af3e05e2a9f04aedf913c83ff5e21301ab595e0b04d0f960eb9f

  • SHA512

    cd120e1507c2c9127455c9dd2f53f912508077367757daa685d97e7f5fb890a04a291e5e4697bffc8cfe151f8990adc2594f2883aef63a4180f2d66f1305d079

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 3 IoCs
  • Accesses Microsoft Outlook profiles 1 TTPs 7 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 behavior: EnumeratesProcesses 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of WriteProcessMemory 39 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Windows\system32\java.exe
    java -jar C:\Users\Admin\AppData\Local\Temp\Remittance.jar
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:480
    • C:\Program Files\Java\jre7\bin\java.exe
      "C:\Program Files\Java\jre7\bin\java.exe" -jar "C:\Users\Admin\Remittance.jar"
      2⤵
      • Drops startup file
      • Loads dropped DLL
      • Adds Run key to start application
      • Suspicious use of WriteProcessMemory
      PID:1508
      • C:\Windows\system32\cmd.exe
        cmd /c schtasks /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Roaming\Remittance.jar"
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1316
        • C:\Windows\system32\schtasks.exe
          schtasks /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Roaming\Remittance.jar"
          4⤵
          • Creates scheduled task(s)
          PID:1688
      • C:\Program Files\Java\jre7\bin\java.exe
        "C:\Program Files\Java\jre7\bin\java.exe" -jar "C:\Users\Admin\AppData\Roaming\Remittance.jar"
        3⤵
        • Loads dropped DLL
        • Accesses Microsoft Outlook profiles
        • Suspicious use of WriteProcessMemory
        • outlook_office_path
        • outlook_win_path
        PID:1932
        • 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:1988
          • C:\Windows\System32\Wbem\WMIC.exe
            wmic /node:. /namespace:'\\root\cimv2' path win32_logicaldisk get volumeserialnumber /format:list
            5⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:1812
        • 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:1600
          • 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:656
        • 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:1160
          • C:\Windows\System32\Wbem\WMIC.exe
            wmic /node:. /namespace:'\\root\cimv2' path win32_operatingsystem get version /format:list
            5⤵
              PID:572
          • 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:1940
            • C:\Windows\System32\Wbem\WMIC.exe
              wmic /node:localhost /namespace:'\\root\securitycenter' path antivirusproduct get displayname /format:list
              5⤵
                PID:1308
            • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
              powershell.exe "[void][Windows.Security.Credentials.PasswordVault,Windows.Security.Credentials,ContentType=WindowsRuntime] $vault = New-Object Windows.Security.Credentials.PasswordVault $vault.RetrieveAll() | % { $_.RetrievePassword();$_ }"
              4⤵
              • Suspicious behavior: EnumeratesProcesses
              PID:1284

      Network

            MITRE ATT&CK Enterprise v6

            Replay Monitor

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            Downloads

            • memory/480-78-0x0000000000220000-0x0000000000221000-memory.dmp

              Filesize

              4KB

            • memory/480-68-0x0000000000220000-0x0000000000221000-memory.dmp

              Filesize

              4KB

            • memory/480-75-0x0000000000220000-0x0000000000221000-memory.dmp

              Filesize

              4KB

            • memory/480-76-0x0000000000220000-0x0000000000221000-memory.dmp

              Filesize

              4KB

            • memory/480-77-0x0000000000220000-0x0000000000221000-memory.dmp

              Filesize

              4KB

            • memory/480-55-0x000007FEFBAB1000-0x000007FEFBAB3000-memory.dmp

              Filesize

              8KB

            • memory/480-83-0x0000000000220000-0x0000000000221000-memory.dmp

              Filesize

              4KB

            • memory/480-72-0x0000000000220000-0x0000000000221000-memory.dmp

              Filesize

              4KB

            • memory/480-71-0x0000000000220000-0x0000000000221000-memory.dmp

              Filesize

              4KB

            • memory/480-70-0x0000000000220000-0x0000000000221000-memory.dmp

              Filesize

              4KB

            • memory/480-56-0x0000000002130000-0x00000000023A0000-memory.dmp

              Filesize

              2.4MB

            • memory/480-69-0x0000000000220000-0x0000000000221000-memory.dmp

              Filesize

              4KB

            • memory/480-57-0x0000000002130000-0x00000000023A0000-memory.dmp

              Filesize

              2.4MB

            • memory/480-73-0x0000000000220000-0x0000000000221000-memory.dmp

              Filesize

              4KB

            • memory/480-58-0x0000000000220000-0x0000000000221000-memory.dmp

              Filesize

              4KB

            • memory/480-59-0x0000000000220000-0x0000000000221000-memory.dmp

              Filesize

              4KB

            • memory/480-66-0x0000000000220000-0x0000000000221000-memory.dmp

              Filesize

              4KB

            • memory/480-62-0x0000000000220000-0x0000000000221000-memory.dmp

              Filesize

              4KB

            • memory/1284-173-0x0000000002792000-0x0000000002794000-memory.dmp

              Filesize

              8KB

            • memory/1284-172-0x0000000002790000-0x0000000002792000-memory.dmp

              Filesize

              8KB

            • memory/1284-174-0x0000000002794000-0x0000000002797000-memory.dmp

              Filesize

              12KB

            • memory/1284-175-0x000000000279B000-0x00000000027BA000-memory.dmp

              Filesize

              124KB

            • memory/1508-88-0x0000000000320000-0x0000000000321000-memory.dmp

              Filesize

              4KB

            • memory/1508-106-0x0000000000320000-0x0000000000321000-memory.dmp

              Filesize

              4KB

            • memory/1508-87-0x0000000002240000-0x00000000024B0000-memory.dmp

              Filesize

              2.4MB

            • memory/1508-101-0x0000000000320000-0x0000000000321000-memory.dmp

              Filesize

              4KB

            • memory/1932-138-0x0000000000130000-0x0000000000131000-memory.dmp

              Filesize

              4KB

            • memory/1932-108-0x0000000000130000-0x0000000000131000-memory.dmp

              Filesize

              4KB

            • memory/1932-109-0x0000000002280000-0x00000000024F0000-memory.dmp

              Filesize

              2.4MB

            • memory/1932-110-0x0000000000130000-0x0000000000131000-memory.dmp

              Filesize

              4KB