Analysis

  • max time kernel
    146s
  • max time network
    147s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    08/05/2024, 17:51

General

  • Target
    PO.jar
  • Size 301KB
  • Sample240508-we5smsad76
  • SHA256 d5ed6717c6b756c1604c1182f078107148dbe72dac5112a6cf3e1b772699676b
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Signatures

  • STRRAT

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

  • Checks computer location settings 2 TTPs 2 IoCs

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

  • Drops startup file 1 IoCs
  • Loads dropped DLL 1 IoCs
  • Modifies file permissions 1 TTPs 1 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.

  • Command and Scripting Interpreter: JavaScript 1 TTPs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • 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 34 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

Processes

  • C:\Program Files (x86)\Common Files\Oracle\Java\javapath\java.exe
    java -jar C:\Users\Admin\AppData\Local\Temp\PO.jar
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1048
    • C:\Windows\system32\icacls.exe
      C:\Windows\system32\icacls.exe C:\ProgramData\Oracle\Java\.oracle_jre_usage /grant "everyone":(OI)(CI)M
      2⤵
      • Modifies file permissions
      PID:2084
    • C:\Windows\SYSTEM32\wscript.exe
      wscript C:\Users\Admin\gopkygzvym.js
      2⤵
      • Checks computer location settings
      • Suspicious use of WriteProcessMemory
      PID:1220
      • C:\Program Files\Java\jre-1.8\bin\javaw.exe
        "C:\Program Files\Java\jre-1.8\bin\javaw.exe" -jar "C:\Users\Admin\AppData\Roaming\bsdacpgy.txt"
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1460
        • C:\Windows\SYSTEM32\wscript.exe
          wscript C:\Users\Admin\pnjtiaccyf.js
          4⤵
          • Checks computer location settings
          • Suspicious use of WriteProcessMemory
          PID:3768
          • C:\Program Files\Java\jre-1.8\bin\javaw.exe
            "C:\Program Files\Java\jre-1.8\bin\javaw.exe" -jar "C:\Users\Admin\AppData\Roaming\jyqizlf.txt"
            5⤵
            • Suspicious use of WriteProcessMemory
            PID:836
            • C:\Program Files\Java\jre-1.8\bin\java.exe
              "C:\Program Files\Java\jre-1.8\bin\java.exe" -jar "C:\Users\Admin\jyqizlf.txt"
              6⤵
              • Drops startup file
              • Adds Run key to start application
              • Suspicious use of WriteProcessMemory
              PID:2544
              • C:\Windows\SYSTEM32\cmd.exe
                cmd /c schtasks /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Roaming\jyqizlf.txt"
                7⤵
                • Suspicious use of WriteProcessMemory
                PID:3468
                • C:\Windows\system32\schtasks.exe
                  schtasks /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Roaming\jyqizlf.txt"
                  8⤵
                  • Creates scheduled task(s)
                  PID:1560
              • C:\Program Files\Java\jre-1.8\bin\java.exe
                "C:\Program Files\Java\jre-1.8\bin\java.exe" -jar "C:\Users\Admin\AppData\Roaming\jyqizlf.txt"
                7⤵
                • Loads dropped DLL
                • Suspicious use of WriteProcessMemory
                PID:4476
                • C:\Windows\SYSTEM32\cmd.exe
                  cmd.exe /c "wmic /node:. /namespace:'\\root\cimv2' path win32_logicaldisk get volumeserialnumber /format:list"
                  8⤵
                  • Suspicious use of WriteProcessMemory
                  PID:2580
                  • C:\Windows\System32\Wbem\WMIC.exe
                    wmic /node:. /namespace:'\\root\cimv2' path win32_logicaldisk get volumeserialnumber /format:list
                    9⤵
                    • Suspicious use of AdjustPrivilegeToken
                    PID:3700
                • C:\Windows\SYSTEM32\cmd.exe
                  cmd.exe /c "wmic /node:. /namespace:'\\root\cimv2' path win32_operatingsystem get caption,OSArchitecture /format:list"
                  8⤵
                  • Suspicious use of WriteProcessMemory
                  PID:3388
                  • C:\Windows\System32\Wbem\WMIC.exe
                    wmic /node:. /namespace:'\\root\cimv2' path win32_operatingsystem get caption,OSArchitecture /format:list
                    9⤵
                    • Suspicious use of AdjustPrivilegeToken
                    PID:2516
                • C:\Windows\SYSTEM32\cmd.exe
                  cmd.exe /c "wmic /node:. /namespace:'\\root\cimv2' path win32_operatingsystem get version /format:list"
                  8⤵
                  • Suspicious use of WriteProcessMemory
                  PID:4948
                  • C:\Windows\System32\Wbem\WMIC.exe
                    wmic /node:. /namespace:'\\root\cimv2' path win32_operatingsystem get version /format:list
                    9⤵
                      PID:4500
                  • C:\Windows\SYSTEM32\cmd.exe
                    cmd.exe /c "wmic /node:localhost /namespace:'\\root\securitycenter2' path antivirusproduct get displayname /format:list"
                    8⤵
                    • Suspicious use of WriteProcessMemory
                    PID:3608
                    • C:\Windows\System32\Wbem\WMIC.exe
                      wmic /node:localhost /namespace:'\\root\securitycenter2' path antivirusproduct get displayname /format:list
                      9⤵
                        PID:1912

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

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            Downloads

            3903daac9bc4a3b7.timestamp

            • Path C:\ProgramData\Oracle\Java\.oracle_jre_usage\3903daac9bc4a3b7.timestamp
            • Size 46B
            • SHA256 2887d7dd041ae0ca2fdcfa0fe11d7ab94bbe79d75b9a8840181b1c21d9fb11b5
            • MD5 SHA1 SHA512

            3903daac9bc4a3b7.timestamp

            • Path C:\ProgramData\Oracle\Java\.oracle_jre_usage\3903daac9bc4a3b7.timestamp
            • Size 46B
            • SHA256 7499b036e4f3a2c6af98d432d18095e8fbbe7b1112460881d07e7995ae9524ab
            • MD5 SHA1 SHA512

            3903daac9bc4a3b7.timestamp

            • Path C:\ProgramData\Oracle\Java\.oracle_jre_usage\3903daac9bc4a3b7.timestamp
            • Size 46B
            • SHA256 03e3a2b7e27962e3358179e386fa46a4c7b765213d2633d266ee67c31f9ef4c9
            • MD5 SHA1 SHA512

            jna5143006415242504944.dll

            • Path C:\Users\Admin\AppData\Local\Temp\jna-63116079\jna5143006415242504944.dll
            • Size 241KB
            • SHA256 a66959bec2ef5af730198db9f3b3f7cab0d4ae70ce01bec02bf1d738e6d1ee7a
            • MD5 SHA1 SHA512 SSDEEP

            83aa4cc77f591dfc2374580bbd95f6ba_6833eb7b-8d4b-4cdd-9502-9bbf7fc1cf9f

            • Path C:\Users\Admin\AppData\Roaming\Microsoft\Crypto\RSA\S-1-5-21-1337824034-2731376981-3755436523-1000\83aa4cc77f591dfc2374580bbd95f6ba_6833eb7b-8d4b-4cdd-9502-9bbf7fc1cf9f
            • Size 45B
            • SHA256 11e6aca8e682c046c83b721eeb5c72c5ef03cb5936c60df6f4993511ddc61238
            • MD5 SHA1 SHA512

            bsdacpgy.txt

            • Path C:\Users\Admin\AppData\Roaming\bsdacpgy.txt
            • Size 219KB
            • SHA256 8d1f7af142e64bcc42117302ce5c20a1e8cce37485f5f8948f006924498cd997
            • MD5 SHA1 SHA512 SSDEEP

            jyqizlf.txt

            • Path C:\Users\Admin\AppData\Roaming\jyqizlf.txt
            • Size 164KB
            • SHA256 4a464631cf3f7f3261f79fc443dd63d0d205806077e33e9ea1477134d2f7c723
            • MD5 SHA1 SHA512 SSDEEP

            gopkygzvym.js

            • Path C:\Users\Admin\gopkygzvym.js
            • Size 457KB
            • SHA256 853111fcdee757c6cf5d95abd5a1925547ec68ae85d6bd98ceb09e54910cc6b2
            • MD5 SHA1 SHA512 SSDEEP

            jna-5.5.0.jar

            • Path C:\Users\Admin\lib\jna-5.5.0.jar
            • Size 1.4MB
            • SHA256 b308faebfe4ed409de8410e0a632d164b2126b035f6eacff968d3908cafb4d9e
            • MD5 SHA1 SHA512 SSDEEP

            jna-platform-5.5.0.jar

            • Path C:\Users\Admin\lib\jna-platform-5.5.0.jar
            • Size 2.6MB
            • SHA256 24d81621f82ac29fcdd9a74116031f5907a2343158e616f4573bbfa2434ae0d5
            • MD5 SHA1 SHA512 SSDEEP

            sqlite-jdbc-3.14.2.1.jar

            • Path C:\Users\Admin\lib\sqlite-jdbc-3.14.2.1.jar
            • Size 4.1MB
            • SHA256 2eae3dea1c3dde6104c49f9601074b6038ff6abcf3be23f4b56f6720a4f6a491
            • MD5 SHA1 SHA512 SSDEEP

            system-hook-3.5.jar

            • Path C:\Users\Admin\lib\system-hook-3.5.jar
            • Size 772KB
            • SHA256 2ddda8af6faef8bde46acf43ec546603180bcf8dcb2e5591fff8ac9cd30b5609
            • MD5 SHA1 SHA512 SSDEEP

            pnjtiaccyf.js

            • Path C:\Users\Admin\pnjtiaccyf.js
            • Size 347KB
            • SHA256 5eb64fbe30ab5c8d68fd358f31f9f3cf9c2cb52032a1736a4b327a3d02d8bd0a
            • MD5 SHA1 SHA512 SSDEEP

            memory/836-75-0x000001CF40C70000-0x000001CF40C71000-memory.dmp

            memory/836-92-0x000001CF40C70000-0x000001CF40C71000-memory.dmp

            memory/836-100-0x000001CF40C70000-0x000001CF40C71000-memory.dmp

            memory/836-113-0x000001CF40C70000-0x000001CF40C71000-memory.dmp

            memory/836-117-0x000001CF40C70000-0x000001CF40C71000-memory.dmp

            memory/836-73-0x000001CF40C70000-0x000001CF40C71000-memory.dmp

            memory/836-57-0x000001CF40C70000-0x000001CF40C71000-memory.dmp

            memory/836-90-0x000001CF40C70000-0x000001CF40C71000-memory.dmp

            memory/1048-15-0x0000021187650000-0x00000211878C0000-memory.dmp

            memory/1048-2-0x0000021187650000-0x00000211878C0000-memory.dmp

            memory/1048-14-0x0000021185DA0000-0x0000021185DA1000-memory.dmp

            memory/1460-33-0x00000180A7320000-0x00000180A7590000-memory.dmp

            memory/1460-21-0x00000180A7320000-0x00000180A7590000-memory.dmp

            memory/1460-32-0x00000180A5920000-0x00000180A5921000-memory.dmp

            memory/2544-152-0x000001DDA7C30000-0x000001DDA7C31000-memory.dmp

            memory/4476-179-0x0000029D48140000-0x0000029D48141000-memory.dmp

            memory/4476-193-0x0000029D48140000-0x0000029D48141000-memory.dmp